Details of the Researcher

PHOTO

Takafumi Toyohara
Section
Tohoku University Hospital
Job title
Associate Professor
Degree
  • 博士(医学)(東北大学)

Research History 10

  • 2023/04 -
    東北大学病院 腎臓・高血圧内科 准教授

  • 2021/12 -
    Tohoku University

  • 2019/02 -
    Tohoku University Graduate School of Biomedical Engineering

  • 2017/09 -
    Beth Israel Deaconess Medical Center Cardiology Research Fellow

  • 2015/01 -
    Harvard University Stem Cell Research Institute Research Fellow

  • 2010/09 -
    京都大学iPS細胞研究所 特定研究員

  • 2010/04 -
    Tohoku University

  • 2009/09 -
    虎の門病院 腎センター 医師

  • 2005/04 -
    聖路加国際病院 チーフレジデント、腎臓内科

  • 2002/04 -
    聖路加国際病院 初期研修医

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Education 2

  • Tohoku University

    2009/09 -

  • Tohoku University Faculty of Medicine School of Medicine

    2002/03 -

Committee Memberships 4

  • 仙台市医師会 仙台市立学校検診 尿検査・腎臓病精密検査専門委員会委員

    2024/04 - Present

  • 日本高血圧学会 評議員

    2023/09 - Present

  • 日本高血圧学会 基礎研究推進部会

    2023/01 - Present

  • 日本腎臓学会 基礎研究推進小委員会

    2020/04 - Present

Professional Memberships 6

  • 日本分子生物学会

  • 日本糖尿病学会

  • 日本高血圧学会

  • 日本透析医学会

  • 日本腎臓学会

  • 日本内科学会

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Research Interests 7

  • 老化

  • 腸内細菌

  • 動脈硬化

  • iPS細胞

  • 再生医療

  • 高血圧

  • 腎臓

Research Areas 4

  • Life sciences / Developmental biology /

  • Life sciences / Biomedical engineering /

  • Life sciences / Cardiology /

  • Life sciences / Nephrology /

Awards 18

  1. 優秀研究賞

    2024/11 化学とマイクロ・ナノシステム学会 螺旋状の高密度平滑筋層を含有し生理的収縮弛緩機能を実現したiPS由来人工血管による老化病態再現

  2. HLGC-NAM 2024 Catalyst Awardee

    2024/10 National Academy of Medicine Aiming for Vascular Regeneration and Rejuvenation Using iPSC-3D Vasculature

  3. 最優秀演題賞 臨床研究部門

    2024/04 日本Uremic toxin研究会 尿毒症物質産生に関与する腸内細菌の解析と同定

  4. 第120回日本内科学会「日本内科学会ことはじめ」 指導教官賞

    2023/04

  5. 第119回日本内科学会「日本内科学会ことはじめ」 指導教官賞

    2022/04

  6. 日本高血圧学会総会SHR賞

    2021/10

  7. International Symposium on Atherosclerosis APSAVD Basic Oral Award

    2021/10

  8. 東北医学会奨学賞

    2021/01

  9. 艮陵医学振興会 医学研究奨励賞

    2020/09

  10. 第117回日本内科学会「日本内科学会ことはじめ」 指導教官賞

    2020/08

  11. International Society for Stem Cell Research (ISSCR) Annual Meeting Travel Award

    2018/06

  12. 第18回武田科学振興財団 生命科学シンポジウムPoster Award

    2015/01

  13. Kidney summit 2013 最優秀演題賞

    2013/12

  14. 東北大学辛酉優秀学生賞特別賞受賞

    2010/10

  15. 東北大学医学部 教育貢献賞

    2008/03

  16. 東北大学大学院医学系研究科第1回リトリート最優秀演題賞

    2008/02

  17. 東北大学大学院医学系研究科 ブースター研究奨励賞

    2007/12

  18. 聖路加国際病院 The Best Resident Award

    2004/03

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Papers 60

  1. Hypoglycemia and hyperinsulinemia induced by phenolic uremic toxins in CKD and DKD patients. International-journal

    Yoshiyasu Tongu, Tomoko Kasahara, Yasutoshi Akiyama, Takehiro Suzuki, Hsin-Jung Ho, Yotaro Matsumoto, Ryota Kujirai, Koichi Kikuchi, Koji Nata, Makoto Kanzaki, Kenshin Suzuki, Shun Watanabe, Chiharu Kawabe, Yui Miyata, Shun Itai, Takafumi Toyohara, Chitose Suzuki, Tetsuhiro Tanaka, Jun Wada, Yoshihisa Tomioka, Takaaki Abe

    Scientific reports 15 (1) 5762-5762 2025/02/17

    DOI: 10.1038/s41598-025-87501-x  

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    Patients with end-stage renal disease have lower fasting plasma glucose and HbA1c levels, with significantly higher insulin levels. For a long time, it has been believed that this higher insulin level in renal failure is due to decreased insulin clearance caused by reduced renal function. However, here we reported that accumulation of the gut microbiota-derived uremic toxin, phenyl sulfate (PS) in the renal failure, increased insulin secretion from the pancreas by enhanced glucose-stimulated insulin secretion. Other endogenous sulfides compounds which accumulated as in the renal failure also increased glucose-stimulated insulin secretion from β-cell. With RNA-seq analyses and gene knock down, we demonstrated that insulin secretion evoked by PS was mediated by Ddah2. In addition, we also found that PS increased insulin resistance through lncRNA expression and Erk phosphorylation in the adipocytes. To confirm the relationship between PS and glucose metabolism in human, we recruited 2 clinical cohort studies (DKD and CKD) including 462 patients, and found that there was a weak negative correlation between PS and HbA1c. Because these trials did not measure fasting insulin level, we alternatively used the urinary C-peptide/creatinine ratio (UCPCR) as an indicator of insulin resistance. We found that PS may induce insulin resistance in patients with eGFR < 60 mL/min/1.73 m2. These data suggest that the accumulation of uremic toxins modulates glucose metabolism and induced insulin resistance in CKD and DKD patients. Considering HbA1c as a reflection of chronic hyperglycemia and UCPCR as a reflection of chronic hyperinsulinemia, our findings indicate that PS is negatively associated with hyperglycemia independent of CKD, and positively associated with hyperinsulinemia in DKD patients.

  2. Waldenström's Macroglobulinemia/Lymphoplasmacytic Lymphoma Developing Renal AA Amyloidosis: A Case Report and Literature Review.

    Yusuke Ishizuka, Yuji Oe, Sosuke Kinomura, Saori Kin, Yuji Noguchi, Koichi Kikuchi, Mai Yoshida, Rui Makino, Koji Okamoto, Tasuku Nagasawa, Takafumi Toyohara, Mariko Miyazaki, Hiroshi Sato, Yasushi Onishi, Hitoshi Warita, Tetsuhiro Tanaka

    Internal medicine (Tokyo, Japan) 2025/02/08

    DOI: 10.2169/internalmedicine.4678-24  

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    AA amyloidosis is a rare renal complication of Waldenström's macroglobulinemia/lymphoplasmacytic lymphoma (WM/LPL). A 66-year-old man with WM/LPL presented with nephrotic syndrome. A renal biopsy showed AA amyloidosis. Chemotherapy resulted in the remission of hematologic and nephrotic syndromes. Two years into follow-up, he became infected with COVID-19 and had massive proteinuria, despite no relapse of WM/LPL. A second renal biopsy confirmed a diagnosis of AA amyloidosis. However, increased prednisolone did not improve proteinuria. The patient ultimately died of cryptococcal meningitis. This case highlights the diverse spectrum of renal involvement in monoclonal IgM-secreting diseases and difficulty in managing fatal complications.

  3. Impacts of low birthweight on kidney development and intergenerational growth of the offspring. International-journal Peer-reviewed

    Akiyo Sekimoto, Yoko Takaso, Haruka Saruyama, Masataka Ookawa, Mari Yamamoto, Takafumi Toyohara, Daisuke Saigusa, Tomoko Fukuuchi, Mayu Otsuka, Yui Fushiki, Seiko Yamakoshi, Kayo Tanaka, Tomoaki Ikeda, Tetsuhiro Tanaka, Nobuyuki Takahashi, Eikan Mishima, Emiko Sato

    iScience 27 (11) 111159-111159 2024/11/15

    DOI: 10.1016/j.isci.2024.111159  

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    Low birthweight (LBW) increases the risk of adult-onset diseases, including kidney diseases, with intergenerational consequences; however, the underlying mechanisms and effective interventions are unclear. To examine the cross-generational effects of LBW, we established an LBW mouse model through reduced uterine perfusion pressure (RUPP) and investigated the therapeutic potential of tadalafil, a phosphodiesterase 5 inhibitor, on LBW-associated consequences. RUPP-pups (R1) had lower fetal and birth weights, delayed renal development, and fewer glomeruli than Sham-pups. In adulthood, R1 mice exhibited persistently fewer glomeruli and elevated blood pressure, while Tadalafil-R1 mice showed reduced hypertension in both sexes and improved renal pathological changes in males. Additionally, pregnant R1 mice displayed inadequate gestational liver hypertrophy, impaired hepatic purine metabolism, and diminished placental angiogenesis, resulting in fetal growth restriction in the subsequent generation. These findings underscore the lasting impact of LBW on adult health and future generations and suggest tadalafil's potential to mitigate LBW-associated risks.

  4. 分娩時大量出血により発症した妊娠関連血栓性微小血管症(TMA)の一例

    吉田 舞, 石塚 悠奨, 木之村 聡介, 野口 雄司, 金 沙織, 菊地 晃一, 大江 佑治, 岡本 好司, 豊原 敬文, 宮崎 真理子, 田中 哲洋

    日本腎臓学会誌 66 (6-E) 884-884 2024/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  5. WM/LPL及びAA型アミロイドーシスの治療中にクリプトコッカス髄膜炎を発症した一例

    石塚 悠奨, 大江 佑治, 木之村 聡介, 野口 雄司, 金 沙織, 菊地 晃一, 吉田 舞, 長澤 将, 豊原 敬文, 宮崎 真理子, 割田 仁, 田中 哲洋

    日本腎臓学会誌 66 (6-E) 888-888 2024/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  6. 溶血性尿毒症症候群に伴う意識障害が遷延した一例

    野口 雄司, 豊原 敬文, 石塚 悠奨, 木之村 聡介, 金 沙織, 菊地 晃一, 吉田 舞, 牧野 塁, 岡本 好司, 長澤 将, 宮崎 真理子, 田中 哲洋

    日本腎臓学会誌 66 (6-E) 913-913 2024/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  7. 原発性アルドステロン症加療中に腎血管性高血圧を診断・治療し得た難治性高血圧の一例

    石垣 駿, 豊原 敬文, 石塚 悠奨, 渡邉 駿, 菊地 晃一, 吉田 舞, 牧野 塁, 大江 佑治, 手塚 雄太, 小野 美澄, 宮崎 真理子, 片桐 秀樹, 田中 哲洋

    日本腎臓学会誌 66 (6-E) 926-926 2024/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  8. 非典型的な臨床経過と腎病理を呈した多発血管炎性肉芽腫症

    木之村 聡介, 豊原 敬文, 白井 剛志, 秋保 真穂, 菊地 晃一, 牧野 塁, 吉田 舞, 大江 佑治, 岡本 好司, 長澤 将, 宮崎 真理子, 佐藤 博, 藤井 博司, 田中 哲洋

    日本腎臓学会誌 66 (6-E) 957-957 2024/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  9. Sporadic inclusion body myositis-derived myotube culture revealed muscle cell-autonomous expression profiles. International-journal Peer-reviewed

    Naoki Suzuki, Makoto Kanzaki, Masashi Koide, Rumiko Izumi, Ryo Fujita, Tadahisa Takahashi, Kazumi Ogawa, Yutaka Yabe, Masahiro Tsuchiya, Masako Suzuki, Ryuhei Harada, Akiyuki Ohno, Hiroya Ono, Naoko Nakamura, Kensuke Ikeda, Hitoshi Warita, Shion Osana, Yoshitsugu Oikawa, Takafumi Toyohara, Takaaki Abe, Muliang Rui, Satoru Ebihara, Ryoichi Nagatomi, Yoshihiro Hagiwara, Masashi Aoki

    PloS one 19 (8) e0306021 2024

    DOI: 10.1371/journal.pone.0306021  

    eISSN: 1932-6203

  10. Development of a LC–MS/MS analytical method of 15 compounds related to renal function for a prognostic method of progression risk in patients with diabetic kidney disease

    Ryota Kujirai, Yotaro Matsumoto, Mizuki Abe, Kodai Hiramoto, Takumi Watanabe, Chitose Suzuki, Takafumi Toyohara, Takaaki Abe, Yoshihisa Tomioka

    Journal of Pharmaceutical and Biomedical Analysis Open 2 100021-100021 2023/12

    Publisher: Elsevier BV

    DOI: 10.1016/j.jpbao.2023.100021  

    ISSN: 2949-771X

  11. Urinary growth differentiation factor 15 predicts renal function decline in diabetic kidney disease. International-journal Peer-reviewed

    Toma Oshita, Shun Watanabe, Takafumi Toyohara, Ryota Kujirai, Koichi Kikuchi, Takehiro Suzuki, Chitose Suzuki, Yotaro Matsumoto, Jun Wada, Yoshihisa Tomioka, Tetsuhiro Tanaka, Takaaki Abe

    Scientific reports 13 (1) 12508-12508 2023/08/02

    DOI: 10.1038/s41598-023-39657-7  

    eISSN: 2045-2322

  12. "Coexistence of IgA nephropathy and renal artery stenosis in Takayasu arteritis: case report and literature review". International-journal Peer-reviewed

    Nono Ito, Tsuyoshi Shirai, Takafumi Toyohara, Hideaki Hashimoto, Hiroko Sato, Hiroshi Fujii, Tomonori Ishii, Hideo Harigae

    Rheumatology international 43 (2) 391-398 2023/02

    DOI: 10.1007/s00296-021-05066-0  

    ISSN: 0172-8172

    eISSN: 1437-160X

  13. SGLT‐1‐specific inhibition ameliorates renal failure and alters the gut microbial community in mice with adenine‐induced renal failure International-journal Peer-reviewed

    Hsin‐Jung Ho, Koichi Kikuchi, Daiki Oikawa, Shun Watanabe, Yoshitomi Kanemitsu, Daisuke Saigusa, Ryota Kujirai, Wakako Ikeda‐Ohtsubo, Mariko Ichijo, Yukako Akiyama, Yuichi Aoki, Eikan Mishima, Yoshiaki Ogata, Yoshitsugu Oikawa, Tetsuro Matsuhashi, Takafumi Toyohara, Chitose Suzuki, Takehiro Suzuki, Nariyasu Mano, Yoshiteru Kagawa, Yuji Owada, Takane Katayama, Toru Nakayama, Yoshihisa Tomioka, Takaaki Abe

    Physiological Reports 9 (24) e15092 2021/12

    Publisher: Wiley

    DOI: 10.14814/phy2.15092  

    ISSN: 2051-817X

    eISSN: 2051-817X

  14. Fibromuscular dysplasia with recurrence after “long-term” following percutaneous transcatheter renal angioplasty: two case reports with a review of 26 patients International-journal Peer-reviewed

    Shuntaro Oribe, Takafumi Toyohara, Eikan Mishima, Takehiro Suzuki, Koichi Kikuchi, Shun Watanabe, Yoshiaki Morita, Hideki Ota, Kazumasa Seiji, Mariko Miyazaki, Kei Takase, Takaaki Abe

    BMC Nephrology 22 (1) 187-187 2021/12

    DOI: 10.1186/s12882-021-02342-w  

    eISSN: 1471-2369

  15. 血中・尿中GDF15の糖尿病性腎症および腎内環境の予測因子としての有用性の臨床検討

    大下 冬馬, 豊原 敬文, 渡邉 駿, 菊池 晃一, 鈴木 健弘, 鯨井 涼太, 宮崎 真理子, 富岡 佳久, 阿部 高明

    日本高血圧学会総会プログラム・抄録集 43回 269-269 2021/10

    Publisher: (NPO)日本高血圧学会

  16. 腎スライス培養を用いたATPイメージング法の確立

    山本 恵則, 高橋 昌宏, 山本 伸也, 豊原 敬文, 阿部 高明, 山本 正道, 柳田 素子

    日本腎臓学会誌 63 (4) 448-448 2021/06

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  17. CE-MS-based Identification of Uremic Solutes Specific to Hemodialysis Patients International-journal Peer-reviewed

    Akiyama, Y, Kikuchi, K, Toyohara, T, Mishima, E, Suzuki, C, Suzuki, T, Nakayama, M, Tomioka, Y, Soga, T, Abe, T

    Toxins 13 (5) 324-324 2021/04/30

    Publisher: MDPI AG

    DOI: 10.3390/toxins13050324  

    eISSN: 2072-6651

  18. Treatment of Refractory Hypertension with Timely Angioplasty in Total Renal Artery Occlusion with Atrophic Kidney. Peer-reviewed

    Yuri Sasaki, Eikan Mishima, Koichi Kikuchi, Takafumi Toyohara, Takehiro Suzuki, Hideki Ota, Kazumasa Seiji, Mariko Miyazaki, Hideo Harigae, Sadayoshi Ito, Kei Takase, Takaaki Abe

    Internal medicine (Tokyo, Japan) 60 (2) 287-292 2021/01/15

    DOI: 10.2169/internalmedicine.5290-20  

    ISSN: 0918-2918

    eISSN: 1349-7235

  19. L-type amino acid transporter 1 is associated with chemoresistance in breast cancer via the promotion of amino acid metabolism. International-journal Peer-reviewed

    Miku Sato, Narumi Harada-Shoji, Takafumi Toyohara, Tomoyoshi Soga, Masatoshi Itoh, Minoru Miyashita, Hiroshi Tada, Masakazu Amari, Naohiko Anzai, Shozo Furumoto, Takaaki Abe, Takashi Suzuki, Takanori Ishida, Hironobu Sasano

    Scientific Reports 11 (1) 589-589 2021/01/12

    DOI: 10.1038/s41598-020-80668-5  

    eISSN: 2045-2322

  20. Concurrent analogous organ damage in the brain, eyes, and kidneys in malignant hypertension: reversible encephalopathy, serous retinal detachment, and proteinuria. International-journal Peer-reviewed

    Eikan Mishima, Yukino Funayama, Takehiro Suzuki, Fumiko Mishima, Fumihiko Nitta, Takafumi Toyohara, Koichi Kikuchi, Hiroshi Kunikata, Junichiro Hashimoto, Mariko Miyazaki, Hideo Harigae, Toru Nakazawa, Sadayoshi Ito, Takaaki Abe

    Hypertension research : official journal of the Japanese Society of Hypertension 44 (1) 88-97 2021/01

    DOI: 10.1038/s41440-020-0521-2  

    ISSN: 0916-9636

    eISSN: 1348-4214

  21. Kidney enlargement effect of angioplasty for nonatherosclerotic renovascular disease: reversibility of ischemic kidney. International-journal Peer-reviewed

    Tomoyuki Iwasaki, Eikan Mishima, Takehiro Suzuki, Koichi Kikuchi, Takafumi Toyohara, Kazumasa Seiji, Kei Takase, Mariko Miyazaki, Hideo Harigae, Sadayoshi Ito, Takaaki Abe

    Hypertension research : official journal of the Japanese Society of Hypertension 43 (11) 1214-1221 2020/11

    DOI: 10.1038/s41440-020-0473-6  

    ISSN: 0916-9636

    eISSN: 1348-4214

  22. Germ-Free Conditions Modulate Host Purine Metabolism, Exacerbating Adenine-Induced Kidney Damage. International-journal Peer-reviewed

    Eikan Mishima, Mariko Ichijo, Takeshi Kawabe, Koichi Kikuchi, Yukako Akiyama, Takafumi Toyohara, Takehiro Suzuki, Chitose Suzuki, Atsuko Asao, Naoto Ishii, Shinji Fukuda, Takaaki Abe

    Toxins 12 (9) 2020/08/26

    DOI: 10.3390/toxins12090547  

    eISSN: 2072-6651

  23. HPRT-related hyperuricemia with a novel p.V35M mutation in HPRT1 presenting familial juvenile gout. Peer-reviewed

    Eikan Mishima, Takayasu Mori, Yoko Nakajima, Takafumi Toyohara, Koichi Kikuchi, Yoshitsugu Oikawa, Tetsuro Matsuhashi, Yasuhiro Maeda, Takehiro Suzuki, Masataka Kudo, Sadayoshi Ito, Eisei Sohara, Shinichi Uchida, Takaaki Abe

    CEN case reports 9 (3) 210-214 2020/08

    DOI: 10.1007/s13730-020-00459-9  

    eISSN: 2192-4449

  24. Patient hiPSCs Identify Vascular Smooth Muscle Arylacetamide Deacetylase as Protective against Atherosclerosis. International-journal Peer-reviewed

    Takafumi Toyohara, Filip Roudnicky, Mary H C Florido, Toshiaki Nakano, Haojie Yu, Shunsuke Katsuki, Minjin Lee, Torsten Meissner, Max Friesen, Lance S Davidow, Leon Ptaszek, Takaaki Abe, Lee L Rubin, Alexandre C Pereira, Masanori Aikawa, Chad A Cowan

    Cell stem cell 27 (1) 147-157 2020/07/02

    DOI: 10.1016/j.stem.2020.04.018  

    ISSN: 1934-5909

    eISSN: 1875-9777

  25. Patient hiPSCs Identify Vascular Smooth Muscle Arylacetamide Deacetylase as Protective against Atherosclerosis. International-journal

    Takafumi Toyohara, Filip Roudnicky, Mary H C Florido, Toshiaki Nakano, Haojie Yu, Shunsuke Katsuki, Minjin Lee, Torsten Meissner, Max Friesen, Lance S Davidow, Leon Ptaszek, Takaaki Abe, Lee L Rubin, Alexandre C Pereira, Masanori Aikawa, Chad A Cowan

    Cell stem cell 27 (1) 178-180 2020/07/02

    DOI: 10.1016/j.stem.2020.05.013  

    ISSN: 1934-5909

    eISSN: 1875-9777

  26. A nonhuman primate model of liver fibrosis towards cell therapy for liver cirrhosis. International-journal Peer-reviewed

    Katsutaro Yasuda, Maki Kotaka, Takafumi Toyohara, Shin-Ichi Sueta, Yuko Katakai, Naohide Ageyama, Shinji Uemoto, Kenji Osafune

    Biochemical and biophysical research communications 526 (3) 661-669 2020/06/04

    DOI: 10.1016/j.bbrc.2020.03.148  

    ISSN: 0006-291X

    eISSN: 1090-2104

  27. Apparent Diffusion Coefficient in the Resolution of Renal Ischemia after Angioplasty on Diffusion-weighted Imaging: Renal Artery Stenosis Caused by Progressive Thrombosis in Residual Chronic Aortic Dissection. Peer-reviewed

    Eikan Mishima, Hideki Ota, Takehiro Suzuki, Takafumi Toyohara, Kazumasa Seiji, Sadayoshi Ito, Yoshikatsu Saiki, Kei Takase, Takaaki Abe

    Internal medicine (Tokyo, Japan) 59 (9) 1173-1177 2020/05/01

    DOI: 10.2169/internalmedicine.3855-19  

    ISSN: 0918-2918

    eISSN: 1349-7235

  28. Mitoregulin Controls β-Oxidation in Human and Mouse Adipocytes. International-journal Peer-reviewed

    Max Friesen, Curtis R Warren, Haojie Yu, Takafumi Toyohara, Qiurong Ding, Mary H C Florido, Carolyn Sayre, Benjamin D Pope, Loyal A Goff, John L Rinn, Chad A Cowan

    Stem cell reports 14 (4) 590-602 2020/04/14

    DOI: 10.1016/j.stemcr.2020.03.002  

    ISSN: 2213-6711

  29. Drugs repurposed as antiferroptosis agents suppress organ damage, including AKI, by functioning as lipid peroxyl radical scavengers. International-journal Peer-reviewed

    Eikan Mishima, Emiko Sato, Junya Ito, Ken-Ichi Yamada, Chitose Suzuki, Yoshitsugu Oikawa, Tetsuro Matsuhashi, Koichi Kikuchi, Takafumi Toyohara, Takehiro Suzuki, Sadayoshi Ito, Kiyotaka Nakagawa, Takaaki Abe

    Journal of the American Society of Nephrology : JASN 31 (2) 280-296 2020/02

    DOI: 10.1681/ASN.2019060570  

    ISSN: 1046-6673

    eISSN: 1533-3450

  30. Mitochondrial dysfunction underlying sporadic inclusion body myositis is ameliorated by the mitochondrial homing drug MA-5. International-journal Peer-reviewed

    Yoshitsugu Oikawa, Rumiko Izumi, Masashi Koide, Yoshihiro Hagiwara, Makoto Kanzaki, Naoki Suzuki, Koichi Kikuchi, Tetsuro Matsuhashi, Yukako Akiyama, Mariko Ichijo, Shun Watanabe, Takafumi Toyohara, Takehiro Suzuki, Eikan Mishima, Yasutoshi Akiyama, Yoshiaki Ogata, Chitose Suzuki, Hironori Hayashi, Eiichi N Kodama, Ken-Ichiro Hayashi, Eiji Itoi, Masashi Aoki, Shigeo Kure, Takaaki Abe

    PloS one 15 (12) e0231064 2020

    DOI: 10.1371/journal.pone.0231064  

    eISSN: 1932-6203

  31. GPR146 Deficiency Protects against Hypercholesterolemia and Atherosclerosis. International-journal Peer-reviewed

    Haojie Yu, Antoine Rimbert, Alice E Palmer, Takafumi Toyohara, Yulei Xia, Fang Xia, Leonardo M R Ferreira, Zhifen Chen, Tao Chen, Natalia Loaiza, Nathaniel Brooks Horwitz, Michael C Kacergis, Liping Zhao, Alexander A Soukas, Jan Albert Kuivenhoven, Sekar Kathiresan, Chad A Cowan

    Cell 179 (6) 1276-1288 2019/11/27

    DOI: 10.1016/j.cell.2019.10.034  

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    Although human genetic studies have implicated many susceptible genes associated with plasma lipid levels, their physiological and molecular functions are not fully characterized. Here we demonstrate that orphan G protein-coupled receptor 146 (GPR146) promotes activity of hepatic sterol regulatory element binding protein 2 (SREBP2) through activation of the extracellular signal-regulated kinase (ERK) signaling pathway, thereby regulating hepatic very low-density lipoprotein (VLDL) secretion, and subsequently circulating low-density lipoprotein cholesterol (LDL-C) and triglycerides (TG) levels. Remarkably, GPR146 deficiency reduces plasma cholesterol levels substantially in both wild-type and LDL receptor (LDLR)-deficient mice. Finally, aortic atherosclerotic lesions are reduced by 90% and 70%, respectively, in male and female LDLR-deficient mice upon GPR146 depletion. Taken together, these findings outline a regulatory role for the GPR146/ERK axis in systemic cholesterol metabolism and suggest that GPR146 inhibition could be an effective strategy to reduce plasma cholesterol levels and atherosclerosis.

  32. Gut microbiome-derived phenyl sulfate contributes to albuminuria in diabetic kidney disease. International-journal Peer-reviewed

    Kikuchi K, Saigusa D, Kanemitsu Y, Matsumoto Y, Thanai P, Suzuki N, Mise K, Yamaguchi H, Nakamura T, Asaji K, Mukawa C, Tsukamoto H, Sato T, Oikawa Y, Iwasaki T, Oe Y, Tsukimi T, Fukuda N, Ho H, Nanto-Hara F, Ogura J, Saito R, Nagao S, Ohsaki Y, Shimada S, Suzuki T, Toyohara T, Mishima E, Shima H, Akiyama Y, Akiyama Y, Ichijo M, Matsuhashi T, Matsuo A, Ogata Y, Yang C, Suzuki C, Breeggemann M, Heymann J, Shimizu M, Ogawa S, Takahashi N, Suzuki T, Owada Y, Kure S, Mano N, Soga T, Wada T, Kopp J, Fukuda S, Hozawa A, Yamamoto M, Ito S, Wada J, Tomioka Y, Abe T

    Nat. Commun. 10 (1) 1835-1835 2019/04/23

    DOI: 10.1038/s41467-019-09735-4  

    eISSN: 2041-1723

  33. Significance of dopamine D1 receptor signalling for steroidogenic differentiation of human induced pluripotent stem cells. International-journal Peer-reviewed

    Koji Matsuo, Masakatsu Sone, Kyoko Honda-Kohmo, Takafumi Toyohara, Takuhiro Sonoyama, Daisuke Taura, Katsutoshi Kojima, Yorihide Fukuda, Youichi Ohno, Mayumi Inoue, Akira Ohta, Kenji Osafune, Kazuwa Nakao, Nobuya Inagaki

    Scientific reports 7 (1) 15120-15120 2017/11/09

    DOI: 10.1038/s41598-017-15485-4  

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    Human induced pluripotent stem cells (hiPSCs) are expected to be both a revolutionary cell source for regenerative medicine and a powerful tool to investigate the molecular mechanisms underlying human cell development in vitro. In the present study, we tried to elucidate the steroidogenic differentiation processes using hiPSC-derived intermediate mesoderm (IM) that is known to be the origin of the human adrenal cortex and gonads. We first performed chemical screening to identify small molecules that induce steroidogenic differentiation of IM cells expressing Odd-skipped related 1 (OSR1), an early IM marker. We identified cabergoline as an inducer of 3β-hydroxysteroid dehydrogenase, an essential enzyme for adrenogonadal steroidogenesis. Although cabergoline is a potent dopamine D2 receptor agonist, additional experiments showed that cabergoline exerted effects as a low-affinity agonist of D1 receptors by increasing intracellular cyclic AMP. Further analysis of OSR1+ cells transfected with steroidogenic factor-1/adrenal 4 binding protein revealed that D1 receptor agonist upregulated expression of various steroidogenic enzymes and increased secretion of steroid hormones synergistically with adrenocorticotropic hormone. These results suggest the importance of dopamine D1 receptor signalling in steroidogenic differentiation, which contributes to effective induction of steroidogenic cells from hiPSCs.

  34. Human pluripotent stem cell-derived erythropoietin-producing cells ameliorate renal anemia in mice. International-journal Peer-reviewed

    Hirofumi Hitomi, Tomoko Kasahara, Naoko Katagiri, Azusa Hoshina, Shin-Ichi Mae, Maki Kotaka, Takafumi Toyohara, Asadur Rahman, Daisuke Nakano, Akira Niwa, Megumu K Saito, Tatsutoshi Nakahata, Akira Nishiyama, Kenji Osafune

    Science translational medicine 9 (409) 2017/09/27

    DOI: 10.1126/scitranslmed.aaj2300  

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    The production of erythropoietin (EPO) by the kidneys, a principal hormone for the hematopoietic system, is reduced in patients with chronic kidney disease (CKD), eventually resulting in severe anemia. Although recombinant human EPO treatment improves anemia in patients with CKD, returning to full red blood cell production without fluctuations does not always occur. We established a method to generate EPO-producing cells from human induced pluripotent stem cells (hiPSCs) by modifying previously reported hepatic differentiation protocols. These cells showed increased EPO expression and secretion in response to low oxygen conditions, prolyl hydroxylase domain-containing enzyme inhibitors, and insulin-like growth factor 1. The EPO protein secreted from hiPSC-derived EPO-producing (hiPSC-EPO) cells induced the erythropoietic differentiation of human umbilical cord blood progenitor cells in vitro. Furthermore, transplantation of hiPSC-EPO cells into mice with CKD induced by adenine treatment improved renal anemia. Thus, hiPSC-EPO cells may be a useful tool for clarifying the mechanisms of EPO production and may be useful as a therapeutic strategy for treating renal anemia.

  35. Novel regenerative therapy for acute kidney injury

    Takafumi Toyohara, Kenji Osafune

    Renal Replacement Therapy 2 34 2016/08/22

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1186/s41100-016-0052-0  

    eISSN: 2059-1381

  36. Mitochonic Acid 5 Binds Mitochondria and Ameliorates Renal Tubular and Cardiac Myocyte Damage International-journal Peer-reviewed

    Takehiro Suzuki, Hiroaki Yamaguchi, Motoi Kikusato, Osamu Hashizume, Satoru Nagatoishi, Akihiro Matsuo, Takeya Sato, Tai Kudo, Tetsuro Matsuhashi, Kazutaka Murayanna, Yuki Ohba, Shun Watanabe, Shin-ichiro Kanno, Daichi Minaki, Daisuke Saigusa, Hiroko Shinbo, Nobuyoshi Mori, Akinori Yuri, Miyuki Yokoro, Eikan Mishima, Hisato Shima, Yasutoshi Akiyama, Yoichi Takeuchi, Koichi Kikuchi, Takafumi Toyohara, Chitose Suzuki, Takaharu Ichimura, Jun-ichi Anzai, Masahiro Kohzuki, Nariyasu Mario, Shigeo Kure, Teruyuki Yanagisawa, Yoshihisa Tomioka, Masaaki Toyomizu, Kohei Tsumoto, Kazuto Nakada, Joseph V. Bonventre, Sadayoshi Ito, Hitoshi Osaka, Ken-ichi Hayashi, Takaaki Abe

    JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY 27 (7) 1925-1932 2016/07

    DOI: 10.1681/ASN.2015060623  

    ISSN: 1046-6673

    eISSN: 1533-3450

  37. Quantitative Targeted Absolute Proteomics for 28 Transporters in Brush-Border and Basolateral Membrane Fractions of Rat Kidney International-journal Peer-reviewed

    Yasuo Uchida, Takafumi Toyohara, Sumio Ohtsuki, Yoshinori Moriyama, Takaaki Abe, Tetsuya Terasaki

    JOURNAL OF PHARMACEUTICAL SCIENCES 105 (2) 1011-1016 2016/02

    DOI: 10.1002/jps.24645  

    ISSN: 0022-3549

    eISSN: 1520-6017

  38. Cell Therapy Using Human Induced Pluripotent Stem Cell-Derived Renal Progenitors Ameliorates Acute Kidney Injury in Mice. International-journal Peer-reviewed

    Takafumi Toyohara, Shin-Ichi Mae, Shin-Ichi Sueta, Tatsuyuki Inoue, Yukiko Yamagishi, Tatsuya Kawamoto, Tomoko Kasahara, Azusa Hoshina, Taro Toyoda, Hiromi Tanaka, Toshikazu Araoka, Aiko Sato-Otsubo, Kazutoshi Takahashi, Yasunori Sato, Noboru Yamaji, Seishi Ogawa, Shinya Yamanaka, Kenji Osafune

    Stem cells translational medicine 4 (9) 980-92 2015/09

    DOI: 10.5966/sctm.2014-0219  

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    UNLABELLED: Acute kidney injury (AKI) is defined as a rapid loss of renal function resulting from various etiologies, with a mortality rate exceeding 60% among intensive care patients. Because conventional treatments have failed to alleviate this condition, the development of regenerative therapies using human induced pluripotent stem cells (hiPSCs) presents a promising new therapeutic option for AKI. We describe our methodology for generating renal progenitors from hiPSCs that show potential in ameliorating AKI. We established a multistep differentiation protocol for inducing hiPSCs into OSR1+SIX2+ renal progenitors capable of reconstituting three-dimensional proximal renal tubule-like structures in vitro and in vivo. Moreover, we found that renal subcapsular transplantation of hiPSC-derived renal progenitors ameliorated the AKI in mice induced by ischemia/reperfusion injury, significantly suppressing the elevation of blood urea nitrogen and serum creatinine levels and attenuating histopathological changes, such as tubular necrosis, tubule dilatation with casts, and interstitial fibrosis. To our knowledge, few reports demonstrating the therapeutic efficacy of cell therapy with renal lineage cells generated from hiPSCs have been published. Our results suggest that regenerative medicine strategies for kidney diseases could be developed using hiPSC-derived renal cells. SIGNIFICANCE: This report is the first to demonstrate that the transplantation of renal progenitor cells differentiated from human induced pluripotent stem (iPS) cells has therapeutic effectiveness in mouse models of acute kidney injury induced by ischemia/reperfusion injury. In addition, this report clearly demonstrates that the therapeutic benefits come from trophic effects by the renal progenitor cells, and it identifies the renoprotective factors secreted by the progenitors. The results of this study indicate the feasibility of developing regenerative medicine strategy using iPS cells against renal diseases.

  39. Vascularized and Complex Organ Buds from Diverse Tissues via Mesenchymal Cell-Driven Condensation. International-journal Peer-reviewed

    Takanori Takebe, Masahiro Enomura, Emi Yoshizawa, Masaki Kimura, Hiroyuki Koike, Yasuharu Ueno, Takahisa Matsuzaki, Takashi Yamazaki, Takafumi Toyohara, Kenji Osafune, Hiromitsu Nakauchi, Hiroshi Y Yoshikawa, Hideki Taniguchi

    Cell stem cell 16 (5) 556-65 2015/05/07

    DOI: 10.1016/j.stem.2015.03.004  

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    Transplantation of in-vitro-generated organ buds is a promising approach toward regenerating functional and vascularized organs. Though it has been recently shown in the context of liver models, demonstrating the applicability of this approach to other systems by delineating the molecular mechanisms guiding organ bud formation is critical. Here, we demonstrate a generalized method for organ bud formation from diverse tissues by combining pluripotent stem cell-derived tissue-specific progenitors or relevant tissue samples with endothelial cells and mesenchymal stem cells (MSCs). The MSCs initiated condensation within these heterotypic cell mixtures, which was dependent upon substrate matrix stiffness. Defining optimal mechanical properties promoted formation of 3D, transplantable organ buds from tissues including kidney, pancreas, intestine, heart, lung, and brain. Transplanted pancreatic and renal buds were rapidly vascularized and self-organized into functional, tissue-specific structures. These findings provide a general platform for harnessing mechanical properties to generate vascularized, complex organ buds with broad applications for regenerative medicine.

  40. Mitochonic Acid 5 (MA-5), a Derivative of the Plant Hormone Indole-3-Acetic Acid, Improves Survival of Fibroblasts from Patients with Mitochondrial Diseases Peer-reviewed

    Suzuki Takehiro, Yamaguchi Hiroaki, Kikusato Motoi, Matsuhashi Tetsuro, Matsuo Akihiro, Sato Takeya, Oba Yuki, Watanabe Shun, Minaki Daichi, Saigusa Daisuke, Shimbo Hiroko, Mori Nobuyoshi, Mishima Eikan, Shima Hisato, Akiyama Yasutoshi, Takeuchi Yoichi, Yuri Akinori, Kikuchi Koichi, Toyohara Takafumi, Suzuki Chitose, Kohzuki Masahiro, Anzai Jun-ichi, Mano Nariyasu, Kure Shigeo, Yanagisawa Teruyuki, Tomioka Yoshihisa, Toyomizu Masaaki, Ito Sadayoshi, Osaka Hitoshi, Hayashi Ken-ichiro, Abe Takaaki

    Tohoku J. Exp. Med. 236 (3) 225-232 2015

    Publisher: Tohoku University Medical Press

    DOI: 10.1620/tjem.236.225  

    ISSN: 0040-8727

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    Mitochondria are key organelles implicated in a variety of processes related to energy and free radical generation, the regulation of apoptosis, and various signaling pathways. Mitochondrial dysfunction increases cellular oxidative stress and depletes ATP in a variety of inherited mitochondrial diseases and also in many other metabolic and neurodegenerative diseases. Mitochondrial diseases are characterized by the dysfunction of the mitochondrial respiratory chain, caused by mutations in the genes encoded by either nuclear DNA or mitochondrial DNA. We have hypothesized that chemicals that increase the cellular ATP levels may ameliorate the mitochondrial dysfunction seen in mitochondrial diseases. To search for the potential drugs for mitochondrial diseases, we screened an in-house chemical library of indole-3-acetic-acid analogs by measuring the cellular ATP levels in Hep3B human hepatocellular carcinoma cells. We have thus identified mitochonic acid 5 (MA-5), 4-(2,4-difluorophenyl)-2-(1H-indol-3-yl)-4-oxobutanoic acid, as a potential drug for enhancing ATP production. MA-5 is a newly synthesized derivative of the plant hormone, indole-3-acetic acid. Importantly, MA-5 improved the survival of fibroblasts established from patients with mitochondrial diseases under the stress-induced condition, including Leigh syndrome, MELAS (myopathy encephalopathy lactic acidosis and stroke-like episodes), Leber's hereditary optic neuropathy, and Kearns-Sayre syndrome. The improved survival was associated with the increased cellular ATP levels. Moreover, MA-5 increased the survival of mitochondrial disease fibroblasts even under the inhibition of the oxidative phosphorylation or the electron transport chain. These data suggest that MA-5 could be a therapeutic drug for mitochondrial diseases that exerts its effect in a manner different from anti-oxidant therapy.

  41. Conformational Change in Transfer RNA Is an Early Indicator of Acute Cellular Damage International-journal Peer-reviewed

    Eikan Mishima, Chisako Inoue, Daisuke Saigusa, Ryusuke Inoue, Koki Ito, Yusuke Suzuki, Daisuke Jinno, Yuri Tsukui, Yosuke Akamatsu, Masatake Araki, Kimi Araki, Ritsuko Shimizu, Haruka Shinke, Takehiro Suzuki, Yoichi Takeuchi, Hisato Shima, Yasutoshi Akiyama, Takafumi Toyohara, Chitose Suzuki, Yoshikatu Saiki, Teiji Tominaga, Shigehito Miyagi, Naoki Kawagisihi, Tomoyoshi Soga, Takayoshi Ohkubo, Kenichi Yamamura, Yutaka Imai, Satohiro Masuda, Venkata Sabbisetti, Takaharu Ichimura, David B. Mount, Joseph V. Bonventre, Sadayoshi Ito, Yoshihisa Tomioka, Kunihiko Itoh, Takaaki Abe

    JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY 25 (10) 2316-2326 2014/10

    DOI: 10.1681/ASN.2013091001  

    ISSN: 1046-6673

    eISSN: 1533-3450

  42. The kidney and uremic toxin removal: glomerulus or tubule? International-journal Peer-reviewed

    Rosalinde Masereeuw, Henricus A M Mutsaers, Takafumi Toyohara, Takaaki Abe, Sachin Jhawar, Douglas H Sweet, Jerome Lowenstein

    Seminars in nephrology 34 (2) 191-208 2014/03

    DOI: 10.1016/j.semnephrol.2014.02.010  

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    Chronic kidney disease (CKD) is a condition that affects approximately 10% of the adult population in developed countries. In patients with CKD adequate renal clearance is compromised, resulting in the accumulation of a plethora of uremic solutes. These uremic retention solutes, also known as uremic toxins, are a heterogeneous group of organic compounds, many are too large to be filtered (middle molecules) or are protein-bound. Tubular secretion shifts the binding and allows for active secretion of such solutes. To mediate urinary solute excretion, renal proximal tubules are equipped with a range of transporters that cooperate in basolateral uptake and luminal excretion. These putative uremic toxins are poorly filtered across dialysis membranes because they are protein bound and current dialysis therapy does not correct the full spectrum of uremic toxicity. Residual renal function, which may represent an important contribution of solutes secreted by the proximal tubule rather than unreabsorbed filtrate, is an important predictor of survival of CKD patients. Many of the transporters that mediate the renal excretion of uremic retention solutes were first recognized as mediators of drug trafficking and drug-drug interactions, and a considerable amount of literature concerning the actions of these transporters antedates the recognition of their importance in the proximal renal tubular transport of uremic retention solutes. These transporters include members belonging to the organic cation/anion/zwitterion solute carrier family, such as the organic anion transporters (OAT)1, OAT3, and OATP4C1, and to the adenosine triphosphate binding cassette superfamily of transmembrane transporters, including the multidrug resistance proteins and breast cancer resistance protein. This article draws on this body of information to describe the renal tubular clearance mechanisms for uremic toxins, as well as the intracellular events associated with their accumulation, involving activation of the aryl hydrocarbon receptor, disturbance of mitochondrial functioning, and competition with metabolizing enzymes.

  43. Indoxyl Sulfate Down-Regulates SLCO4C1 Transporter through Up-Regulation of GATA3 International-journal Peer-reviewed

    Yasutoshi Akiyama, Koichi Kikuchi, Daisuke Saigusa, Takehiro Suzuki, Yoichi Takeuchi, Eikan Mishima, Yasuaki Yamamoto, Ayako Ishida, Daiki Sugawara, Daisuke Jinno, Hisato Shima, Takafumi Toyohara, Chitose Suzuki, Tomokazu Souma, Takashi Moriguchi, Yoshihisa Tomioka, Sadayoshi Ito, Takaaki Abe

    PLOS ONE 8 (7) e66518 2013/07

    DOI: 10.1371/journal.pone.0066518  

    ISSN: 1932-6203

  44. A metabolomic approach to clarifying the effect of AST-120 on 5/6 nephrectomized rats by capillary electrophoresis with mass spectrometry (CE-MS). International-journal Peer-reviewed

    Yasutoshi Akiyama, Yoichi Takeuchi, Koichi Kikuchi, Eikan Mishima, Yasuaki Yamamoto, Chitose Suzuki, Takafumi Toyohara, Takehiro Suzuki, Atsushi Hozawa, Sadayoshi Ito, Tomoyoshi Soga, Takaaki Abe

    Toxins 4 (11) 1309-22 2012/11/14

    DOI: 10.3390/toxins4111309  

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    The oral adsorbent AST-120 is composed of spherical carbon particles and has an adsorption ability for certain small-molecular-weight compounds that accumulate in patients with chronic kidney disease (CKD). So far, very few compounds are known to be adsorbed by AST-120 in vivo. To examine the effect of AST-120 in vivo, we comprehensively evaluated the plasma concentrations of 146 compounds (61 anions and 85 cations) in CKD model rats, with or without four weeks of treatment with AST-120. By capillary electrophoresis with mass spectrometry, we identified 6 anions and 17 cations that were significantly decreased by AST-120 treatment. In contrast, we also identified 2 cations that were significantly increased by AST-120. Among them, 4&#160;anions, apart from indoxyl sulfate and hippurate, and 19 cations were newly identified in this study. The plasma levels of N-acetyl-neuraminate, 4-pyridoxate, 4-oxopentanoate, glycine, &#947;-guanidinobutyrate, N-&#947;-ethylglutamine, allantoin, cytosine, 5-methylcytosine and imidazole-4-acetate were significantly increased in the CKD model compared with the sham-operated group, and were significantly decreased by AST-120 treatment. Therefore, these 10 compounds could be added as uremic compounds that indicate the effect of AST-120 treatment. This study provides useful information not only for identifying the indicators of AST-120, but also for clarifying changes in the metabolic profile by AST-120 treatment in the clinical setting.

  45. Global gene expression profiling in PPAR-γ agonist-treated kidneys in an orthologous rat model of human autosomal recessive polycystic kidney disease International-journal Peer-reviewed

    Daisuke Yoshihara, Masanori Kugita, Tamio Yamaguchi, Harold M. Aukema, Hiroki Kurahashi, Miwa Morita, Yoshiyuki Hiki, James P. Calvet, Darren P. Wallace, Takafumi Toyohara, Takaaki Abe, Shizuko Nagao

    PPAR Research 2012 695898-695898 2012

    DOI: 10.1155/2012/695898  

    ISSN: 1687-4757

    eISSN: 1687-4765

  46. Successful peritoneal dialysis after renal transcatheter arterial embolization in autosomal dominant polycystic kidney disease. International-journal Peer-reviewed

    Takafumi Toyohara, Noriko Hayami, Yoshifumi Ubara

    American journal of kidney diseases : the official journal of the National Kidney Foundation 58 (5) 860-1 2011/11

    DOI: 10.1053/j.ajkd.2011.07.008  

  47. Metabolomic profiling of the autosomal dominant polycystic kidney disease rat model Peer-reviewed

    Takafumi Toyohara, Takehiro Suzuki, Yasutoshi Akiyama, Daisuke Yoshihara, Yoichi Takeuchi, Eikan Mishima, Koichi Kikuchi, Chitose Suzuki, Masayuki Tanemoto, Sadayoshi Ito, Shizuko Nagao, Tomoyoshi Soga, Takaaki Abe

    Clinical and Experimental Nephrology 15 (5) 676-687 2011/10

    DOI: 10.1007/s10157-011-0467-4  

    ISSN: 1342-1751

    eISSN: 1437-7799

  48. Transcriptional Regulation of Organic Anion Transporting Polypeptide SLCO4C1 as a New Therapeutic Modality to Prevent Chronic Kidney Disease International-journal Peer-reviewed

    Suzuki, T, Toyohara, T, Akiyama, Y, Takeuchi, Y, Mishima, E, Suzuki, C, Ito, S, Soga, T, Abe, T

    J. Pharm. Sci. 100 (9) 3696-3707 2011/09

    DOI: 10.1002/jps.22641  

    ISSN: 0022-3549

  49. Analysis of transporter function and development to clinical application Peer-reviewed

    TOYOHARA Takafumi, ABE Takaaki

    Seikagaku. The Journal of Japanese Biochemical Society 83 (4) 323-328 2011/04/25

    Publisher:

    ISSN: 0037-1017

  50. Luminal Alkalinization Attenuates Proteinuria-Induced Oxidative Damage in Proximal Tubular Cells International-journal Peer-reviewed

    Tomokazu Souma, Michiaki Abe, Takashi Moriguchi, Jun Takai, Noriko Yanagisawa-Miyazawa, Eisuke Shibata, Yasutoshi Akiyama, Takafumi Toyohara, Takehiro Suzuki, Masayuki Tanemoto, Takaaki Abe, Hiroshi Sato, Masayuki Yamamoto, Sadayoshi Ito

    JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY 22 (4) 635-648 2011/04

    DOI: 10.1681/ASN.2009111130  

    ISSN: 1046-6673

    eISSN: 1533-3450

  51. Prognosis of patients on continuous ambulatory peritoneal dialysis (CAPD) for over 10 years. Peer-reviewed

    Takafumi Toyohara, Yoshifumi Ubara, Yasushi Higa, Tatsuya Suwabe, Junichi Hoshino, Keiichi Sumida, Rikako Hiramatsu, Motonori Nagasawa, Eiko Hasegawa, Masayuki Yamanouchi, Noriko Hayami, Yuji Marui, Naoki Sawa, Michio Nakamura, Shinji Tomikawa, Kenmei Takaichi

    Internal medicine (Tokyo, Japan) 50 (21) 2519-23 2011

    eISSN: 1349-7235

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    BACKGROUND: Patients who have been on continuous ambulatory peritoneal dialysis (CAPD) for over 10 years are known to have a risk of developing encapsulating peritoneal sclerosis (EPS). However, the prognosis of patients on CAPD for over 10 years remains unclear. METHODS: To better understand the efficacy of a variety of treatments for EPS, we retrospectively reviewed 25 patients who started CAPD at Toranomon Hospital from 1981 to 1997 and continued it for longer than 10 years. RESULTS: The CAPD catheter was removed without peritoneal lavage in the initial 3 patients and they developed massive ascites. They all died of infection without resolution of the ascites. Accordingly, in the remaining 13 patients who did not undergo kidney transplantation, peritoneal lavage therapy was performed for 12 months before removing the CAPD catheter. As a result, 4 patients did not develop EPS. However, 9 patients had EPS with ascites, among whom 4 died of EPS-related diseases and 5 are alive. Five patients underwent cadaveric donor kidney transplantation. At the time of surgery, the CAPD catheter was removed without peritoneal lavage; 1 patient suffered from massive ascites immediately, although this subsided within 3 months after kidney transplantation, and 4 patients remain free from EPS-related symptoms and are doing well. CONCLUSION: Kidney transplantation may be an option for preventing EPS. This study showed that improvement of the uremic state as well as treatment with immunosuppressants including corticosteroids may contribute to preventing EPS.

  52. Metabolomic profiling of uremic solutes in CKD patients International-journal Peer-reviewed

    Toyohara, T, Akiyama, Y, Suzuki, T, Takeuchi, Y, Mishima, E, Tanemoto, M, Momose, A, Toki, N, Sato, H, Nakayama, M, Hozawa, A, Tsuji, I, Ito, S, Soga, T, Abe. T

    Hypertens. Res. 33 (9) 944-952 2010/09

    DOI: 10.1038/hr.2010.113   10.1038/hr.2010.158(Erratum)  

    ISSN: 0916-9636

  53. Transport of Estrone 3-sulfate Mediated by Organic Anion Transporter OATP4C1: Estrone 3-sulfate binds to the Different Recognition Site for Digoxin in OATP4C1 International-journal Peer-reviewed

    Hiroaki Yamaguchi, Misa Sugie, Masahiro Okada, Tsuyoshi Mikkaichi, Takafumi Toyohara, Takaaki Abe, Junichi Goto, Takanori Hishinuma, Miki Shimada, Nariyasu Mano

    DRUG METABOLISM AND PHARMACOKINETICS 25 (3) 314-317 2010

    DOI: 10.2133/dmpk.25.314  

    ISSN: 1347-4367

    eISSN: 1880-0920

  54. SLCO4C1 Transporter Eliminates Uremic Toxins and Attenuates Hypertension and Renal Inflammation International-journal Peer-reviewed

    Takafumi Toyohara, Takehiro Suzuki, Ryo Morimoto, Yasutoshi Akiyama, Tomokazu Souma, Hiromi O. Shiwaku, Yoichi Takeuchi, Eikan Mishima, Michiaki Abe, Masayuki Tanemoto, Satohiro Masuda, Hiroaki Kawano, Koji Maernura, Masaaki Nakayama, Hiroshi Sato, Tsuyoshi Mikkaichi, Hiroaki Yamaguchi, Shigefumi Fukui, Yoshihiro Fukumoto, Hiroaki Shimokawa, Ken-ichi Inui, Tetsuya Terasaki, Junichi Goto, Sadayoshi Ito, Takanori Hishinuma, Isabelle Rubera, Michel Tauc, Yoshiaki Fujii-Kuriyama, Hikaru Yabuuchi, Yoshinori Moriyama, Tomoyoshi Soga, Takaaki Abe

    JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY 20 (12) 2546-2555 2009/12

    DOI: 10.1681/ASN.2009070696  

    ISSN: 1046-6673

    eISSN: 1533-3450

  55. MAGI-1a functions as a scaffolding protein for the distal renal tubular basolateral K+ channels. International-journal Peer-reviewed

    Masayuki Tanemoto, Takafumi Toyohara, Takaaki Abe, Sadayoshi Ito

    The Journal of biological chemistry 283 (18) 12241-7 2008/05/02

    Publisher: 18

    DOI: 10.1074/jbc.M707738200  

    ISSN: 0021-9258

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    As the K(+) recycling pathway for renal Na(+) reabsorption, renal tubular K(+) channels participate in the fluid and electrolyte homeostasis. Previously, we showed that the Kir5.1/Kir4.1 heteromer, which is a heteromeric assembly of two inwardly rectifying K(+) channels, composes the principal basolateral K(+) channels in distal renal tubules and that two motifs in the carboxyl-terminal portion of the Kir4.1 subunit regulate its functional expression. In this study, by using yeast two-hybrid screening, we identified a new isoform of membrane-associated guanylate kinase with inverted domain structure 1 (MAGI-1a-long) as a scaffolding protein for the basolateral K(+) channels. MAGI-1a-long interacted with the PSD-95/Dlg/ZO-1 (PDZ)-binding motif of Kir4.1 by its fifth PDZ domain, and a high salt diet, which could suppress mineralocorticoid secretion, facilitated the interaction. The phosphorylation of serine 377 in the PDZ-binding motif disrupted the interaction, and the disruption of the interaction altered the intracellular localization of the channels from the basolateral side to perinuclear components. These results demonstrate that the phosphorylation-dependent scaffolding of the basolateral K(+) channels by MAGI-1a-long participates in the renal regulation of the fluid and electrolyte homeostasis.

  56. A case of rhabdomyolysis induced by the approved daily dose of a traditional Chinese medicine Peer-reviewed

    TOYOHARA Takafumi, TANEMOTO Masayuki, URUNO Akira, ABE Michiaki, ABE Takaaki, ITO Sadayoshi

    The Japanese journal of nephrology 50 (2) 135-139 2008/03/25

    Publisher:

    ISSN: 0385-2385

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    We report a case of a 67-year-old woman with hypokalemic rhabdomyolysis induced by pseudohyperaldosteronism. The pseudohyperaldosteronism in this case was caused by the administration of a traditional Chinese medicine, which contained 2.0 g of licorice in the approved daily dose. She started to suffer from hypertension and general fatigue after taking the medication, but continued it for two years until admission after an episode of diarrhea and vomiting. On admission, severe hypokalemia (1.6 mEq/L) and increased serum creatinine kinase (8,778 IU/L) was noted. With the findings of a high transtubular potassium concentration gradient (TTKG) in spite of low plasma renin activity and a low plasma aldosterone concentration, we suspected licorice-induced pseudohyperaldosteronism as the cause of her hypokalemic rhabdomyolysis. The Chinese medicine was terminated, and she received appropriate hydration and potassium replacement therapy as judged by the value of TTKG with the result that her serum potassium and creatinine kinase levels were normalized without any more adverse events. Since it was only a low dose of licorice (2.0 g/day) that induced hypokalemic rhabdomyolysis in this case, serum electrolytes should be examined in all cases under the possible consumption of licorice.

  57. PRAVASTATIN, HMG-COA REDUCTASE INHIBITOR, STIMULATES INSULIN SECRETION THROUGH ORGANIC ANION TRANSPORTER IN THE PANCREAS Peer-reviewed

    Takafumi Toyohara, Takehiro Suzuki, Michiaki Abe, Hiromi Shiwaku, Yasutoshi Akiyama, Eisuke Shibata, Masayuki Tanemoto, Sumio Ohtsuki, Tetsuya Terasaki, Sadayoshi Ito, Takaaki Abe

    DRUG METABOLISM REVIEWS 39 279-279 2007

    ISSN: 0360-2532

  58. Nocardia exalbida sp. nov., isolated from Japanese patients with nocardiosis. International-journal Peer-reviewed

    Soji Iida, Akiko Kageyama, Katsukiyo Yazawa, Noboru Uchiyama, Takafumi Toyohara, Naohiko Chohnabayashi, Shin-Ichi Suzuki, Fumio Nomura, Reiner M Kroppenstedt, Yuzuru Mikami

    International journal of systematic and evolutionary microbiology 56 (Pt 6) 1193-1196 2006/06

    DOI: 10.1099/ijs.0.63850-0  

    More details Close

    Two bacterial strains isolated from different hospitals in Japan were subjected to a polyphasic analysis. Strains IFM 0803(T) and IFM 10383 were found to have morphological, biochemical, physiological and chemotaxonomic properties consistent with their classification in the genus Nocardia. Strains IFM 0803(T) and IFM 10383 clustered with the type strain of Nocardia xishanensis, showing 16S rRNA gene sequence similarities of 98.6-98.9 % with this species. The novel strains could be distinguished from N. xishanensis by a range of phenotypic properties. Based on their phenotypic and phylogenetic characteristics, the two isolates are proposed as members of a novel species of the genus Nocardia, Nocardia exalbida sp. nov., with the type strain IFM 0803(T) (=NBRC 100660(T) = JCM 12667(T) = DSM 44883(T)).

  59. Molecular characterization of human and rat organic anion transporter OATP-D. International-journal Peer-reviewed

    Hisanobu Adachi, Takehiro Suzuki, Michiaki Abe, Naoki Asano, Hiroya Mizutamari, Masayuki Tanemoto, Toshiyuki Nishio, Tohru Onogawa, Takafumi Toyohara, Satoshi Kasai, Fumitoshi Satoh, Masanori Suzuki, Taro Tokui, Michiaki Unno, Tooru Shimosegawa, Seiki Matsuno, Sadayoshi Ito, Takaaki Abe

    American journal of physiology. Renal physiology 285 (6) F1188-97-97 2003/12

    Publisher: 6

    DOI: 10.1152/ajprenal.00402.2002  

    ISSN: 1931-857X

    More details Close

    We have isolated and characterized a novel human and rat organic anion transporter subtype, OATP-D. The isolated cDNA from human brain encodes a polypeptide of 710 amino acids (Mr 76,534) with 12 predicted transmembrane domains. The rat clone encodes 710 amino acids (Mr 76,821) with 97.6% amino acid sequence homology with human OATP-D. Human and rat OATP-D have moderate amino acid sequence homology with LST-l/rlst-1, the rat oatp family, the prostaglandin transporter, and moatl/MOAT1/KIAA0880/OATP-B. Phylogenetic tree analysis revealed that OATP-D is branched in a different position from all known organic anion transporters. OATP-D transports prostaglandin E1 (Km 48.5 nM), prostaglandin E2 (Km 55.5 nM), and prostaglandin F2,, suggesting that, functionally, OATP-D encodes a protein that has similar characteristics to those of the prostaglandin transporter. Rat OATP-D also transports prostaglandins. The expression pattern of OATP-D mRNA was abundant mainly in the heart, testis, brain, and some cancer cells. Immunohistochemical analysis further revealed that rat OATP-D is widely expressed in the vascular, renal, and reproductive system at the protein level. These results suggest that OATP-D plays an important role in translocating prostaglandins in specialized tissues and cells.

  60. Molecular characterization of human and rat organic anion transporter OATP-D Peer-reviewed

    Hisanobu Adachi, Takehiro Suzuki, Michiaki Abe, Naoki Asano, Hiroya Mizutamari, Masayuki Tanemoto, Toshiyuki Nishio, Tohru Onogawa, Takafumi Toyohara, Satoshi Kasai, Fumitoshi Satoh, Masanori Suzuki, Taro Tokui, Michiaki Unno, Tooru Shimosegawa, Seiki Matsuno, Sadayoshi Ito, Takaaki Abe

    American Journal of Physiology - Renal Physiology 285 (6) F1188-F1197 2003/12

    ISSN: 0363-6127

Show all ︎Show first 5

Misc. 108

  1. Developing new therapies for atherosclerosis in chronic kidney disease through microbiome manipulation

    豊原敬文, 渡辺駿, 阿部高明

    臨床薬理の進歩 (45) 71-78 2024/06

    Publisher: (公財)臨床薬理研究振興財団

    ISSN: 0914-4366

  2. ミトコンドリア治療によるcGAS-STING経路とNLRP3インフラマソームを介した炎症調節とゴーシェ病の新規治療法の開発

    頓宮慶泰, 笠原朋子, 三枝大輔, 沼倉周彦, 曽我朋義, 村山圭, 豊原敬文, 阿部高明

    日本分子生物学会年会プログラム・要旨集(Web) 47th 2024

  3. Development of LC-MS/MS simultaneous quantitative method for biomarker candidate compounds aimed to realize a prognostic method for renal function in diabetic kidney disease

    鯨井涼太, 安部水輝, 平本航大, 渡辺匠, 鈴木千登世, 豊原敬文, 豊原敬文, 阿部高明, 阿部高明, 松本洋太郎, 富岡佳久

    日本薬学会年会要旨集(Web) 144th 2024

    ISSN: 0918-9823

  4. 老化による細胞内脂質代謝酵素変化に着目した新規動脈硬化治療法の開発

    豊原敬文

    ライフサイエンス振興財団助成成果報告書 2023 2024

  5. 高血圧と腎 腎血管性高血圧の最新の知見

    豊原 敬文, 阿部 高明, 田中 哲洋

    日本腎臓学会誌 65 (6-E) 569-569 2023/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  6. 家族性慢性偽性腸閉塞症に対する小腸移植12年後に透析導入に至った一例

    豊原 敬文, 玉懸 直人, 古田 銀次, 吉田 舞, 牧野 塁, 長澤 将, 渥美 淑子, 和田 基, 宮崎 真理子, 田中 哲洋

    日本腎臓学会誌 65 (6-E) 578-578 2023/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  7. 悪性高血圧症を契機に診断に至った腎サルコイドーシスの1例

    木之村 聡介, 豊原 敬文, 千葉 祐貴, 菊地 晃一, 牧野 塁, 吉田 舞, 岡本 好司, 長澤 将, 佐藤 博, 宮崎 真理子, 田中 哲洋

    日本腎臓学会誌 65 (6-E) 581-581 2023/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  8. 横隔膜による呼気時腎動脈圧迫により腎血管性高血圧を来した一例

    玉懸 直人, 豊原 敬文, 古田 銀次, 吉田 舞, 牧野 塁, 菊地 晃一, 長澤 将, 鈴木 健弘, 宮崎 真理子, 阿部 高明, 田中 哲洋

    日本腎臓学会誌 65 (6-E) 581-581 2023/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  9. 急性腎障害と手指壊死を呈したCOVID-19の一例

    野口 雄司, 菊地 晃一, 玉懸 直人, 古田 銀次, 吉田 舞, 牧野 塁, 岡本 好司, 長澤 将, 豊原 敬文, 宮崎 真理子, 田中 哲洋

    日本腎臓学会誌 65 (6-E) 598-598 2023/09

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  10. Computational fluid dynamic analysis to investigate pathophysiology of renovascular hypertension

    是方真悠子, 板井駿, 豊原敬文, 渡邉駿, 菊地晃一, 鈴木健弘, 阿部高明, 田中哲洋

    日本高血圧学会総会プログラム・抄録集(CD-ROM) 45回 300-300 2023/09

    Publisher: (NPO)日本高血圧学会

  11. 尿毒素フェニル硫酸はインスリン分泌を刺激し糖尿病性腎症におけるインスリン抵抗性を惹起する

    頓宮 慶泰, 笠原 朋子, 川邊 千陽, 鈴木 健新, 菊地 晃一, 三瀬 広記, 鯨井 涼太, 松本 洋太郎, 秋山 泰利, 渡邉 駿, 豊原 敬文, 鈴木 健弘, 和田 淳, 富岡 佳久, 田中 哲洋, 阿部 高明

    日本腎臓学会誌 65 (3) 336-336 2023/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  12. 糖尿病性腎臓病の腎予後予測マーカーとしてのフェニル硫酸の有用性

    菊地 晃一, 鯨井 涼太, 松本 洋太郎, 中村 智洋, 渡邉 駿, 三瀬 広記, 豊原 敬文, 鈴木 健弘, 富岡 佳久, 和田 淳, 阿部 高明

    日本腎臓学会誌 65 (3) 288-288 2023/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  13. 血液透析導入期における血中腸内細菌由来尿毒素の解析

    豊原 敬文, 山本 多恵, 金光 祥臣, 菊地 晃一, 渡邉 駿, 鈴木 健弘, 田中 哲洋, 阿部 高明

    日本透析医学会雑誌 56 (Suppl.1) 653-653 2023/05

    Publisher: (一社)日本透析医学会

    ISSN: 1340-3451

    eISSN: 1883-082X

  14. 腎不全患者の尿毒症物質生成に関与する腸内細菌の解析

    豊原 敬文, 杉峯 諒, 渡邉 駿, 菊地 晃一, 鈴木 健弘, 鯨井 涼太, 富岡 佳久, 田中 哲洋, 阿部 高明

    日本腎臓学会誌 65 (3) 254-254 2023/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  15. 糖尿病性腎臓病の腎予後予測マーカーとしてのフェニル硫酸の有用性

    菊地 晃一, 鯨井 涼太, 松本 洋太郎, 中村 智洋, 渡邉 駿, 三瀬 広記, 豊原 敬文, 鈴木 健弘, 富岡 佳久, 和田 淳, 阿部 高明

    日本腎臓学会誌 65 (3) 288-288 2023/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  16. Elobixibat投与マウスにおける胆汁酸および腸内細菌叢の検討

    蓑輪 圭太, 秋山 由雅子, 笠原 朋子, 何 欣蓉, 前川 正充, 菊池 晃一, 豊原 敬文, 鈴木 健弘, 鈴木 千登世, 鯨井 涼太, 松本 洋太郎, 富岡 佳久, 阿部 高明

    日本腎臓学会誌 65 (3) 294-294 2023/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  17. 尿毒素フェニル硫酸はインスリン分泌を刺激し糖尿病性腎症におけるインスリン抵抗性を惹起する

    頓宮 慶泰, 笠原 朋子, 川邊 千陽, 鈴木 健新, 菊地 晃一, 三瀬 広記, 鯨井 涼太, 松本 洋太郎, 秋山 泰利, 渡邉 駿, 豊原 敬文, 鈴木 健弘, 和田 淳, 富岡 佳久, 田中 哲洋, 阿部 高明

    日本腎臓学会誌 65 (3) 336-336 2023/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  18. 糖尿病性腎症におけるインスリン分泌促進とインスリン抵抗性亢進の原因に尿毒素フェニル硫酸が存在する

    頓宮 慶泰, 笠原 朋子, 川邊 千陽, 鈴木 健新, 菊地 晃一, 三瀬 広記, 鯨井 涼太, 松本 洋太郎, 秋山 泰利, 鈴木 千登世, 渡邉 駿, 豊原 敬文, 鈴木 健弘, 和田 淳, 富岡 佳久, 田中 哲弘, 阿部 高明

    糖尿病 66 (Suppl.1) S-209 2023/04

    Publisher: (一社)日本糖尿病学会

    ISSN: 0021-437X

    eISSN: 1881-588X

  19. Beneficial Effects of Mitochondrial-homing Drug on Pyruvate Dehydrogenase Complex Deficiency

    小川裕美佳, 豊原敬文, 豊原敬文, 松橋徹郎, 及川善嗣, 渡邉駿, 菊地晃一, 鈴木健弘, 鈴木健弘, 呉繁夫, 村山圭, 曽我朋義, 阿部高明

    日本小児科学会雑誌 127 (2) 289-289 2023/02

    Publisher: (公社)日本小児科学会

    ISSN: 0001-6543

  20. MA-5 a novel therapeutic approach, for Gaucher disease, via mitochondrial dysfunction/NLRP3 inflammasome axis

    頓宮慶泰, 頓宮慶泰, 豊原敬文, 藤田理彩子, 藤田理彩子, 三枝大輔, 及川善嗣, 松橋徹郎, 沼倉周彦, 兪志前, 香川慶輝, 渡邉駿, 菊地晃一, 鈴木健弘, 新妻邦泰, 呉繁夫, 村山圭, 大和田祐二, 蘇我朋義, 富田博秋, 阿部高明

    日本小児科学会雑誌 127 (2) 289-289 2023/02

    Publisher: (公社)日本小児科学会

    ISSN: 0001-6543

  21. 糖尿病性腎臓病の腎予後予測マーカーとしてのフェニル硫酸の有用性

    菊地晃一, 鯨井涼太, 松本洋太郎, 中村智洋, 渡邉駿, 三瀬広記, 豊原敬文, 鈴木健弘, 富岡佳久, 和田淳, 阿部高明

    日本腎臓学会誌(Web) 65 (3) 2023

    ISSN: 1884-0728

  22. Elobixibat投与マウスにおける胆汁酸および腸内細菌叢の検討

    蓑輪圭太, 秋山由雅子, 笠原朋子, 何欣蓉, 前川正充, 菊池晃一, 豊原敬文, 鈴木健弘, 鈴木千登世, 鯨井涼太, 松本洋太郎, 富岡佳久, 阿部高明

    日本腎臓学会誌(Web) 65 (3) 2023

    ISSN: 1884-0728

  23. 尿毒素フェニル硫酸はインスリン分泌を刺激し糖尿病性腎症におけるインスリン抵抗性を惹起する

    頓宮慶泰, 笠原朋子, 川邊千陽, 鈴木健新, 菊地晃一, 三瀬広記, 鯨井涼太, 松本洋太郎, 秋山泰利, 渡邉駿, 豊原敬文, 鈴木健弘, 和田淳, 富岡佳久, 田中哲洋, 阿部高明

    日本腎臓学会誌(Web) 65 (3) 2023

    ISSN: 1884-0728

  24. 腎不全患者の尿毒症物質生成に関与する腸内細菌の解析

    豊原敬文, 杉峯諒, 渡邉駿, 菊地晃一, 鈴木健弘, 鯨井涼太, 富岡佳久, 田中哲洋, 阿部高明

    日本腎臓学会誌(Web) 65 (3) 2023

    ISSN: 1884-0728

  25. iPS細胞由来3D血管を用いた動脈硬化の病態解析

    豊原敬文

    医科学応用研究財団研究報告(CD-ROM) 40 2023

    ISSN: 2185-2561

  26. 急性腎障害と手指壊死を呈したCOVID-19の一例

    野口雄司, 菊地晃一, 玉懸直人, 古田銀次, 吉田舞, 牧野塁, 岡本好司, 長澤将, 豊原敬文, 宮崎真理子, 田中哲洋

    日本腎臓学会誌(Web) 65 (6-E) 2023

    ISSN: 1884-0728

  27. 悪性高血圧症を契機に診断に至った腎サルコイドーシスの1例

    木之村聡介, 豊原敬文, 千葉祐貴, 菊地晃一, 牧野塁, 吉田舞, 岡本好司, 長澤将, 佐藤博, 宮崎真理子, 田中哲洋

    日本腎臓学会誌(Web) 65 (6-E) 2023

    ISSN: 1884-0728

  28. 横隔膜による呼気時腎動脈圧迫により腎血管性高血圧を来した一例

    玉懸直人, 豊原敬文, 古田銀次, 吉田舞, 牧野塁, 菊地晃一, 長澤将, 鈴木健弘, 宮崎真理子, 阿部高明, 田中哲洋

    日本腎臓学会誌(Web) 65 (6-E) 2023

    ISSN: 1884-0728

  29. 家族性慢性偽性腸閉塞症に対する小腸移植12年後に透析導入に至った一例

    豊原敬文, 玉懸直人, 古田銀次, 吉田舞, 牧野塁, 長澤将, 渥美淑子, 和田基, 宮崎真理子, 田中哲洋

    日本腎臓学会誌(Web) 65 (6-E) 2023

    ISSN: 1884-0728

  30. 腎血管性高血圧の最新の知見

    豊原敬文, 阿部高明, 田中哲洋

    日本腎臓学会誌(Web) 65 (6-E) 2023

    ISSN: 1884-0728

  31. 糖尿病性腎症におけるインスリン分泌促進とインスリン抵抗性亢進の原因に尿毒素フェニル硫酸が存在する

    頓宮慶泰, 笠原朋子, 川邊千陽, 鈴木健新, 菊地晃一, 菊地晃一, 三瀬広記, 鯨井涼太, 松本洋太郎, 秋山泰利, 鈴木千登世, 渡邉駿, 渡邉駿, 豊原敬文, 豊原敬文, 鈴木健弘, 鈴木健弘, 和田淳, 富岡佳久, 田中哲弘, 阿部高明, 阿部高明

    糖尿病(Web) 66 (Suppl) 2023

    ISSN: 1881-588X

  32. 尿毒素フェニル硫酸は糖尿病性腎症におけるインスリン分泌促進とインスリン抵抗性に関与する

    頓宮 慶泰, 菊地 晃一, 鈴木 健新, 三瀬 広記, 和田 淳, 秋山 泰利, 那谷 耕司, 鯨井 涼太, 松本 洋太郎, 富岡 佳久, 渡邉 駿, 豊原 敬文, 鈴木 健弘, 田中 哲弘, 阿部 高明

    日本高血圧学会総会プログラム・抄録集 44回 77-77 2022/10

    Publisher: (NPO)日本高血圧学会

  33. 尿毒素フェニル硫酸は糖尿病性腎症におけるインスリン分泌促進とインスリン抵抗性に関与する

    頓宮 慶泰, 菊地 晃一, 鈴木 健新, 三瀬 広記, 和田 淳, 秋山 泰利, 那谷 耕司, 鯨井 涼太, 松本 洋太郎, 富岡 佳久, 渡邉 駿, 豊原 敬文, 鈴木 健弘, 田中 哲弘, 阿部 高明

    日本高血圧学会総会プログラム・抄録集 44回 77-77 2022/10

    Publisher: (NPO)日本高血圧学会

  34. 【腎臓症候群(第3版)-その他の腎臓疾患を含めて-[I]】腎血管系障害 腎動脈線維筋性異形成

    豊原 敬文, 阿部 高明, 田中 哲洋

    日本臨床 別冊 (腎臓症候群I) 221-225 2022/08

    Publisher: (株)日本臨床社

    ISSN: 0047-1852

  35. 糖尿病患者由来のiPS細胞を用いた動脈硬化抑制因子の発見—Patient iPSCs identify vascular smooth muscle AADAC as protective against atherosclerosis

    豊原 敬文, Chad A. Cowan, 阿部 高明

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    Publisher: 東京 : 科学評論社

    ISSN: 2435-1946

  36. 糖尿病性腎症の新規予後予測マーカーとしての尿中フェニル硫酸

    菊地 晃一, 鯨井 涼太, 松本 洋太郎, 中村 智洋, 三瀬 広記, 渡邉 駿, 豊原 敬文, 鈴木 健弘, 和田 淳, 富岡 佳久, 阿部 高明

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    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  37. 特集 こんなときどうする?他科とのコミュニケーションガイド (第8章)腎臓内科・泌尿器科 高血圧

    豊原 敬文, 阿部 高明

    産科と婦人科 89 (13) 330-335 2022/03/25

    Publisher: (株)診断と治療社

    DOI: 10.34433/j00525.2022140476  

    ISSN: 0386-9792

  38. 動脈硬化における小胞体リパーゼとミトコンドリアの働きについて

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    生体膜と薬物の相互作用シンポジウム講演要旨集 43rd 2022

    ISSN: 0919-2131

  39. ケモカインレセプターCCR10を介した腸腎連関の調節と腎不全治療

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    日本腎臓学会誌 63 (4) 520-520 2021/06

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  40. 腸内細菌叢と胆汁酸の調節による腎不全治療

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    日本腎臓学会誌 63 (4) 459-459 2021/06

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  41. 腸内細菌叢と胆汁酸の調節による腎不全治療

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    日本腎臓学会誌 63 (4) 459-459 2021/06

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  42. iPS細胞由来3D血管を用いた動脈硬化の病態解析

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    医科学応用研究財団研究報告 / 鈴木謙三記念医科学応用研究財団 [編] 40 222-225 2021

    Publisher: 名古屋 : 鈴木謙三記念医科学応用研究財団

    ISSN: 0914-5117

    eISSN: 2185-2561

  43. ケモカインレセプターCCR10を介した腸腎連関の調節と腎不全治療

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    日本腎臓学会誌(Web) 63 (4) 2021

    ISSN: 1884-0728

  44. 糖尿病性腎症の発症・進展予測マーカーとしてのフェニル硫酸の有用性

    菊地 晃一, 三枝 大輔, 金光 祥臣, 松本 洋太郎, 三瀬 広記, 中村 智洋, 三島 英換, 豊原 敬文, 鈴木 健弘, 寳澤 篤, 和田 淳, 富岡 佳久, 阿部 高明

    日本腎臓学会誌 62 (4) 276-276 2020/07

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  45. 糖尿病性腎症の発症・進展予測マーカーとしてのフェニル硫酸の有用性

    菊地 晃一, 三枝 大輔, 金光 祥臣, 松本 洋太郎, 三瀬 広記, 中村 智洋, 三島 英換, 豊原 敬文, 鈴木 健弘, 寳澤 篤, 和田 淳, 富岡 佳久, 阿部 高明

    日本腎臓学会誌 62 (4) 276-276 2020/07

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  46. ラット多発性嚢胞腎におけるPPARγアゴニスト投与の治療効果に関する網羅的遺伝子発現プロファイリング

    吉原 大輔, 釘田 雅則, 倉橋 浩樹, 森田 美和, 比企 能之, 山口 太美雄, 豊原 敬文, 阿部 高明, 長尾 枝澄香

    日本腎臓学会誌 54 (3) 281-281 2012/04

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  47. 尿毒症物質によるエリスロポエチン産生低下の発症機序の解明

    秋山 泰利, 鈴木 健弘, 豊原 敬文, 竹内 陽一, 三島 英換, 佐藤 博, 伊藤 貞義, 阿部 高明

    日本内分泌学会雑誌 88 (1) 374-374 2012/04

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  48. スタチンによる尿毒症物質排泄トランスポーター発現制御と腎不全治療

    鈴木 健弘, 豊原 敬文, 秋山 泰利, 竹内 陽一, 三島 英換, 佐藤 博, 伊藤 貞嘉, 曽我 朋義, 阿部 高明

    Therapeutic Research 33 (2) 201-203 2012/02

    Publisher: ライフサイエンス出版(株)

    ISSN: 0289-8020

  49. 尿毒症物質による尿毒症物質排泄トランスポーターSLCO4C1の転写制御と排泄促進の意義

    鈴木 健弘, 豊原 敬文, 秋山 泰利, 竹内 陽一, 三島 英換, 佐藤 博, 伊藤 貞嘉, 曽我 朋義, 阿部 高明

    日本高血圧学会総会プログラム・抄録集 34回 422-422 2011/10

    Publisher: (NPO)日本高血圧学会

  50. 尿毒症物質による尿毒症物質排泄トランスポーターSLCO4C1の転写制御の意義

    鈴木 健弘, 豊原 敬文, 秋山 泰利, 竹内 陽一, 三島 英換, 鈴木 千登世, 山口 浩明, 曽我 朋義, 伊藤 貞嘉, 阿部 高明

    日本腎臓学会誌 53 (3) 385-385 2011/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  51. スタチンによる尿毒書物質排泄トランスポーターの発現制御と腎不全治療

    鈴木 健弘, 豊原 敬文, 秋山 泰利, 竹内 陽一, 三島 英換, 佐藤 博, 伊藤 貞嘉, 曽我 朋義, 阿部 高明

    日本内分泌学会雑誌 87 (1) 287-287 2011/04

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  52. 尿細管管腔内アルカリ化は蛋白尿による近位尿細管細胞酸化ストレスをPyk2経路を介して改善させる.

    相馬 友和, 阿部 倫明, 森口 尚, 高井 淳, 秋山 泰利, 豊原 敬文, 鈴木 健弘, 種本 雅之, 阿部 高明, 山本 雅之, 伊藤 貞嘉

    血管 34 (1) 32-33 2011

    Publisher: 日本心脈管作動物質学会

    ISSN: 0911-4637

  53. トランスポーター研究の臨床薬理 尿細管排泄機構と尿毒症物質 トランスポーター発現制御による腎不全治療

    鈴木 健弘, 豊原 敬文, 秋山 泰利, 竹内 陽一, 三島 英換, 中山 昌明, 佐藤 博, 伊藤 貞嘉, 曽我 朋義, 阿部 高明

    臨床薬理 41 (Suppl.) S139-S139 2010/11

    Publisher: (一社)日本臨床薬理学会

    ISSN: 0388-1601

    eISSN: 1882-8272

  54. Erratum: Metabolomic profiling of uremic solutes in CKD patients (Hypertension Research (2010) 33 (945) DOI: 10.1038/hr.2010.113)

    Takafumi Toyohara, Yasutoshi Akiyama, Takehiro Suzuki, Yoichi Takeuchi, Eikan Mishima, Masayuki Tanemoto, Ayako Momose, Naoko Toki, Hiroshi Sato, Masaaki Nakayama, Atsushi Hozawa, Ichiro Tsuji, Sadayoshi Ito, Tomoyoshi Soga, Takaaki Abe

    Hypertension Research 33 1089 2010/10/01

    DOI: 10.1038/hr.2010.158  

    ISSN: 0916-9636

  55. トランスポーターを介したスタチンによる尿毒症性物質排泄強化による新たな慢性腎臓病治療

    豊原 敬文, 鈴木 健弘, 秋山 泰利, 竹内 陽一, 三島 英換, 種本 雅之, 中山 昌明, 伊藤 貞嘉, 曽我 朋義, 阿部 高明

    Diabetes Frontier 21 (5) 631-632 2010/10

    Publisher: (株)メディカルレビュー社

    ISSN: 0915-6593

  56. 尿毒症物質排泄を担う腎臓特異的有機アニオントランスポーターSLCO4C1のスタチンによる発現誘導効果の検討

    鈴木 健弘, 豊原 敬文, 秋山 泰利, 竹内 陽一, 三島 英換, 種本 雅之, 中山 昌明, 佐藤 博, 伊藤 貞嘉, 曽我 朋義, 阿部 高明

    日本高血圧学会総会プログラム・抄録集 33回 250-250 2010/10

    Publisher: (NPO)日本高血圧学会

  57. 動脈硬化性腎動脈狭窄を発見する為の予測因子の検討

    三島 英換, 齋藤 陽孝, 竹内 陽一, 秋山 泰利, 豊原 敬文, 鈴木 健弘, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本高血圧学会総会プログラム・抄録集 33回 396-396 2010/10

    Publisher: (NPO)日本高血圧学会

  58. CKD患者における尿毒症物質の解析

    秋山 泰利, 鈴木 健弘, 豊原 敬文, 竹内 陽一, 三島 英換, 種本 雅之, 中山 昌明, 佐藤 博, 寳澤 篤, 辻 一郎, 伊藤 貞嘉, 曽我 朋義, 阿部 高明

    日本高血圧学会総会プログラム・抄録集 33回 365-365 2010/10

    Publisher: (NPO)日本高血圧学会

  59. スタチンによる尿毒症物質排泄のメカニズムとその臨床応用

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    Therapeutic Research 31 (9) 1221-1223 2010/09

    Publisher: ライフサイエンス出版(株)

    ISSN: 0289-8020

  60. CKD患者と腎不全ラットにおける腎不全物質の網羅的解析

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    日本透析医学会雑誌 43 (Suppl.1) 363-363 2010/05

    Publisher: (一社)日本透析医学会

    ISSN: 1340-3451

    eISSN: 1883-082X

  61. CE-MSを用いた血液透析前後の尿毒症物質除去効率の網羅的解析

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    日本透析医学会雑誌 43 (Suppl.1) 800-800 2010/05

    Publisher: (一社)日本透析医学会

    ISSN: 1340-3451

    eISSN: 1883-082X

  62. 腎臓特異的有機アニオントランスポーターSLCO4C1による腎不全物質排泄促進を介した高血圧と腎内炎症の改善

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    日本腎臓学会誌 52 (3) 281-281 2010/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  63. キャピラリー電気泳動質量分析により同定された新規ヒト腎不全物質18種類の毒性と酸化ストレス惹起

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    日本腎臓学会誌 52 (3) 281-281 2010/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  64. CE-MSを用いた血液透析前後の尿毒症物質除去効率の網羅的解析

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    日本腎臓学会誌 52 (3) 378-378 2010/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  65. ADPKDモデルラットにおける腎不全物質の網羅的解析

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    日本腎臓学会誌 52 (3) 396-396 2010/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  66. CKD患者の尿毒症物質と早期診断マーカーの網羅的解析

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    日本腎臓学会誌 52 (3) 340-340 2010/05

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  67. Statin-inducible uremic toxin transporter prevents hypertension, renal function and inflammation

    Takehiro Suzuki, Takafumi Toyohara, Yasutoshi Akiyama, Masayuki Tanemoto, Sadayoshi Ito, Tomoyoshi Soga, Takaaki Abe

    ENDOCRINE JOURNAL 57 S330-S331 2010/03

    ISSN: 0918-8959

  68. High glucose augments susceptibility of AT1R-induced NAD(P)H oxidase activation in mesangial cell

    Michiaki Abe, Tomokazu Souma, Yanagisawa-Miyazawa Noriko, Yasutoshi Akiyama, Takafumi Toyohara, Masayuki Tanemoto, Takaaki Abe, Hiroshi Sato, Masaaki Nakayama, Sadayoshi Ito

    ENDOCRINE JOURNAL 57 S400-S400 2010/03

    ISSN: 0918-8959

  69. UREMIC TOXIN TRANSPORTER SLCO4C1 IS ENHANCED BY STATINS

    Suzuki Takehiro, Toyohara Takahumi, Akiyama Yasutoshi, Takuuchi Yoichi, Mishima Eikan, Tanemoto Masayuki, Ito Sadayoshi, Soga Tomoyoshi, Abe Takaaki

    Abstracts of Annual meeting of Japanese Society for the Study of Xenobiotics 25 44-44 2010

    Publisher: The Japanese Society for the Study of Xenobiotics

    DOI: 10.14896/jssxmeeting.25.0.44.0  

  70. Acidification Aggravates Fatty Acid-Bound Albumin-Induced Superoxide Production in Renal Proximal Tubular Cells Through Activation of Pyk2 Pathways

    Tomokazu Souma, Michiaki Abe, Yasutoshi Akiyama, Takafumi Toyohara, Shiwaku O. Hiromi, Takehiro Suzuki, Masayuki Tanemoto, Takaaki Abe, Sadayoshi Ito

    HYPERTENSION 54 (4) E84-E84 2009/10

    ISSN: 0194-911X

  71. 尿細管管腔内酸性化は脂肪酸結合アルブミンによる近位尿細管細胞からの活性酸素産生を増悪させる

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    日本高血圧学会総会プログラム・抄録集 32回 172-172 2009/10

    Publisher: (NPO)日本高血圧学会

  72. ヒト腎臓特異的有機アニオントランスポーターSLCO4C1の転写活性調節と臨床応用

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    日本高血圧学会総会プログラム・抄録集 32回 236-236 2009/10

    Publisher: (NPO)日本高血圧学会

  73. 狭窄部血行動態指標と血行再建術による降圧効果の動脈硬化性腎動脈狭窄での検討

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    日本高血圧学会総会プログラム・抄録集 32回 313-313 2009/10

    Publisher: (NPO)日本高血圧学会

  74. スタチンによる血圧降下作用機序の解析

    豊原 敬文, 秋山 泰利, 竹内 陽一, 三島 英換, 相馬 友和, 鈴木 健弘, 阿部 倫明, 種本 雅之, 曽我 朋義, 伊藤 貞嘉, 阿部 高明

    日本高血圧学会総会プログラム・抄録集 32回 323-323 2009/10

    Publisher: (NPO)日本高血圧学会

  75. 腎動脈ステント留置後再狭窄の治療適応判定における腎動脈エコーの有用性

    竹内 陽一, 三島 英換, 秋山 泰利, 豊原 敬文, 鈴木 健弘, 阿部 倫明, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本腎臓学会誌 51 (6) 692-692 2009/08

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  76. Low luminal pH aggravates fatty acid bound albumin induced O-2(.-) production in renal proximal tubular cell

    Tomokazu Souma, Michiaki Abe, Yasutoshi Akiyama, Takafumi Toyohara, Takehiro Suzuki, Hiromi O. Shiwaku, Masayuki Tanemoto, Takaaki Abe, Sadayoshi Ito

    FASEB JOURNAL 23 2009/04

    ISSN: 0892-6638

  77. ミネラルコルチコイドによるイオン輸送制御の分子機構

    種本 雅之, 豊原 敬文, 相馬 友和, 秋山 泰利, 岩倉 芳倫, 塩飽 浩美, 鈴木 健弘, 阿部 倫明, 阿部 高明, 伊藤 貞嘉

    日本内分泌学会雑誌 85 (1) 374-374 2009/04

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  78. 腎遠位尿細管イオンチャネルの機能局在を制御する分子機構

    種本 雅之, 豊原 敬文, 塩飽 浩美, 島 久登, 岩倉 芳倫, 相馬 友和, 秋山 泰利, 鈴木 健弘, 阿部 倫明, 阿部 高明, 伊藤 貞嘉

    日本腎臓学会誌 51 (3) 298-298 2009/04

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  79. 妊娠高血圧症候群8症例における血中エンドグリン濃度と血中ADMA濃度の検討

    秋山 泰利, 岩倉 芳倫, 相馬 友和, 豊原 敬文, 鈴木 健弘, 阿部 倫明, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本腎臓学会誌 51 (3) 307-307 2009/04

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  80. フルバスタチンはオレイン酸結合アルブミン刺激に伴う尿細管酸化ストレスを抑制する

    相馬 友和, 阿部 倫明, 秋山 泰利, 豊原 敬文, 鈴木 健弘, 塩飽 博美, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本腎臓学会誌 51 (3) 339-339 2009/04

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  81. 腎遠位尿細管管腔側カリウムチャネルの機能的発現機構の解明

    島 久登, 種本 雅之, 相馬 友和, 秋山 泰利, 岩倉 芳倫, 塩飽 浩美, 豊原 敬文, 鈴木 健弘, 阿部 倫明, 阿部 高明, 伊藤 貞嘉

    日本腎臓学会誌 51 (3) 350-350 2009/04

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

    eISSN: 1884-0728

  82. Manipulate expression of the kidney specific organic anion transporter SLCO4C1

    Toyohara Takafumi, Suzuki Takehiro, Akiyama Yasutoshi, Takeuchi Yoichi, Mishima Eikan, Abe Michiaki, Tanemoto Masayuki, Ito Sadayoshi, Abe Takaaki

    Abstracts of Annual meeting of Japanese Society for the Study of Xenobiotics 24 56-56 2009

    Publisher: The Japanese Society for the Study of Xenobiotics

    DOI: 10.14896/jssxmeeting.24.0.56.0  

  83. LOW LUMINAL PH AGGRAVATES FATTY ACID BOUND ALBUMIN INDUCED O2 center dot- PRODUCTION IN RENAL PROXIMAL TUBULAR CELL

    Tomokazu Souma, Michiaki Abe, Yasutoshi Akiyama, Takafumi Toyohara, Hiromi O. Shiwaku, Takehiro Suzuki, Masayuki Tanemoto, Takaaki Abe, Sadayoshi Ito

    JOURNAL OF VASCULAR RESEARCH 46 99-99 2009

    ISSN: 1018-1172

  84. LOW LUMINAL pH AGGRAVATES FATTY ACID BOUD ALBUMIN INDUCED O-2(center dot-) PRODUCTION IN RENAL PROXIMAL TUBULAR CELL

    Tomokazu Souma, Michiaki Abe, Yasutoshi Akiyama, Takafumi Toyohara, Hiromi O. Shiwaku, Takehiro Suzuki, Masayuki Tanemoto, Takaaki Abe, Sadayoshi Ito

    JOURNAL OF PHYSIOLOGICAL SCIENCES 59 485-485 2009

    ISSN: 1880-6546

  85. プラバスタチンは有機アニオントランスポーターを介して膵β細胞からのインスリン分泌を刺激する

    鈴木 健弘, 阿部 倫明, 豊原 敬文, 石井 晶子, 野口 直哉, 秋山 泰利, 相馬 友和, 塩飽 浩美, 種本 雅之, 伊藤 貞嘉, 阿部 高明

    日本高血圧学会総会プログラム・抄録集 31回 190-190 2008/10

    Publisher: (NPO)日本高血圧学会

  86. 妊娠高血圧症候群8症例における血中エンドグリン濃度の検討

    秋山 泰利, 相馬 友和, 豊原 敬文, 鈴木 健弘, 阿部 倫明, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本高血圧学会総会プログラム・抄録集 31回 360-360 2008/10

    Publisher: (NPO)日本高血圧学会

  87. 褐色細胞腫および傍神経節腫の診断における随時尿メタネフリン分画・クレアチニン比の有用性について

    相馬 友和, 秋山 泰利, 豊原 敬文, 鈴木 健弘, 阿部 倫明, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本高血圧学会総会プログラム・抄録集 31回 365-365 2008/10

    Publisher: (NPO)日本高血圧学会

  88. メサンギウム細胞における高グルコース曝露がアンジオテンシンII刺激による酸化ストレス産生を増強させる機序について

    阿部 倫明, 宮澤 紀子, 豊原 敬文, 相馬 友和, 鈴木 健弘, 秋山 泰利, 塩飽 浩美, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本内分泌学会雑誌 84 (2) 693-693 2008/09

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  89. トランスポーター研究の新展開 医療現場におけるトランスポーター研究の応用

    阿部 高明, 豊原 敬文, 秋山 泰利, 阿部 倫明, 鈴木 健弘, 種本 雅之, 野口 直哉, 高沢 伸

    薬剤学: 生命とくすり 68 (Suppl.) 24-24 2008/04

    Publisher: (公社)日本薬剤学会

    ISSN: 0372-7629

    eISSN: 2188-3149

  90. 褐色細胞腫および傍神経節腫への非イオン性ヨード造影剤使用に伴う合併症の検討

    相馬 友和, 秋山 泰利, 豊原 敬文, 鈴木 健弘, 阿部 倫明, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本内分泌学会雑誌 84 (1) 252-252 2008/04

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  91. メサンギウム細胞におけるアンギオテンシンII負荷と糖負荷による酸化ストレス反応性の相違について

    阿部 倫明, 宮澤 紀子, 豊原 敬文, 中山 謙二, 鈴木 健弘, 塩飽 浩美, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本高血圧学会総会プログラム・抄録集 30回 226-226 2007/10

    Publisher: (NPO)日本高血圧学会

  92. アンジオテンシンIIとブドウ糖は異なる様式でメサンギウム細胞の酸化ストレスを産生させた

    阿部 倫明, 宮澤 紀子, 豊原 敬文, 中山 謙二, 鈴木 健弘, 秋山 泰利, 塩飽 浩美, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本内分泌学会雑誌 83 (2) 589-589 2007/09

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  93. Pravastatinは有機アニオントランスポーターを介して膵β細胞からのインスリン分泌を刺激する

    阿部 倫明, 豊原 敬文, 鈴木 健弘, 秋山 泰利, 種本 雅之, 伊藤 貞嘉, 阿部 高明

    日本内分泌学会雑誌 83 (2) 593-593 2007/09

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  94. 近位尿細管特異的GFP-tTA発現マウスの作製と解析

    豊原 敬文, 鈴木 健弘, 阿部 倫明, 秋山 泰利, 種本 雅之, 伊藤 貞嘉, 阿部 高明

    日本内分泌学会雑誌 83 (2) 595-595 2007/09

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  95. 経皮経管腎動脈拡張術後の再狭窄がロサルタン内服後の正常血圧の維持により改善した一例

    秋山 泰利, 種本 雅之, 豊原 敬文, 鈴木 健弘, 阿部 倫明, 阿部 高明, 伊藤 貞嘉

    日本内分泌学会雑誌 83 (2) 598-598 2007/09

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

    eISSN: 2186-506X

  96. 近位尿細管特異的遺伝子調節マウスの作製と解析

    豊原 敬文, 鈴木 健弘, 阿部 倫明, 種本 雅之, 柴田 英介, 進藤 智彦, 島 彦仁, 伊藤 貞嘉, 阿部 高明

    日本腎臓学会誌 49 (3) 338-338 2007/04

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

  97. Pravastatinは有機アニオントランスポーターを介して膵β細胞からのインスリン分泌を刺激する

    豊原 敬文, 阿部 倫明, 石井 晶子, 塩飽 浩美, 鈴木 健弘, 柴田 英介, 種本 雅之, 伊藤 貞嘉, 阿部 高明

    日本内分泌学会雑誌 83 (1) 115-115 2007/04

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

  98. 尿細管における酸化ストレス増幅機構の潜在性について

    阿部 倫明, 宮沢 紀子, 豊原 敬文, 柴田 英介, 鈴木 健弘, 塩飽 浩美, 種本 雅之, 佐藤 文俊, 阿部 高明, Cowley Jr. Allen W, 伊藤 貞嘉

    血管 30 (1) 32-32 2007/01

    Publisher: 日本心脈管作動物質学会

    ISSN: 0911-4637

  99. DEVELOPMENT OF THE RENAL PROXIMAL TUBULE SPECIFIC-INDUCIBLE GENE EXPRESSION SYSTEM

    Takafumi Toyohara, Takehiro Suzuki, Michiaki Abe, Yasutoshi Akiyama, Hiromi Shiwaku, Eisuke Shibata, Masayuki Tanemoto, Sadayoshi Ito, Takaaki Abe

    DRUG METABOLISM REVIEWS 39 331-331 2007

    ISSN: 0360-2532

  100. Effects of sarpogrelate hydrochloride on metabolic function

    Michiaki Abe, Akiko Ishii, Takehiro Suzuki, Takafumi Toyohara, Hiromi Shiwaku, Ryo Morimoto, Tatsuji Chaki, Masayuki Tanemoto, Toshifumi Satoh, Toshiaki Abe, Sadayoshi Ito, Takaaki Abe

    JOURNAL OF HYPERTENSION 24 353-353 2006/12

    ISSN: 0263-6352

  101. Hydrogen peroxide, produced by high sodium stimulation, potentially stimulates the production of superoxide anion in mTAL

    Michiaki Abe, Paul O'Connor, Takafumi Toyohara, Takehiro Suzuki, Masayuki Tanemoto, Takaaki Abe, Sadayoshi Ito, Allen W. Cowley

    JOURNAL OF HYPERTENSION 24 397-397 2006/12

    ISSN: 0263-6352

  102. Chronic or acute interaction of angiotensin II on oxidative stress production by glucose pretreated mesangial cells

    Noriko Miyazawa, Michiaki Abe, Takafumi Toyohara, Takehiro Suzuki, Kenji Nakayama, Akiko Ishii, Hiromi Shiwaku, Eisuke Shibata, Masayuki Tanemoto, Fumitoshi Satoh, Takaaki Abe, Sadayoshi Ito

    JOURNAL OF HYPERTENSION 24 181-181 2006/12

    ISSN: 0263-6352

  103. 腎動脈エコーが腎血管性高血圧の診断に有用であった3症例

    豊原 敬文, 宇留野 晃, 阿部 倫明, 種本 雅之, 佐藤 文俊, 阿部 高明, 竹内 和久, 伊藤 貞嘉

    日本腎臓学会誌 48 (6) 597-597 2006/08

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

  104. メサンジウム細胞におけるアンジオテンシンIIとグルコースの共依存的活性酸素合成について

    宮沢 紀子, 阿部 倫明, 中山 謙二, 豊原 敬文, 鈴木 健弘, 種本 雅之, 佐藤 文俊, 阿部 高明, 伊藤 貞嘉

    日本腎臓学会誌 48 (3) 274-274 2006/04

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

  105. 甲状腺ホルモントランスポーター遺伝子群の単離と機能解析

    鈴木 健弘, 三日市 剛, 茶木 辰治, 森本 玲, 豊原 敬文, 阿部 倫明, 佐藤 文俊, 種本 雅之, 阿部 高明, 伊藤 貞嘉

    日本内分泌学会雑誌 82 (1) 96-96 2006/04

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

  106. 塩酸サルポグレラートの代謝機能における作用の検討

    阿部 倫明, 石井 晶子, 鈴木 健弘, 豊原 敬文, 塩飽 浩美, 森本 玲, 茶木 辰治, 種本 雅之, 阿部 俊明, 伊藤 貞嘉, 阿部 高明

    糖尿病 49 (Suppl.1) S247-S247 2006/04

    Publisher: (一社)日本糖尿病学会

    ISSN: 0021-437X

  107. 塩酸サルポグレラートによる糖尿病性腎症の改善効果

    阿部 倫明, 鈴木 健弘, 石井 晶子, 豊原 敬文, 塩飽 浩美, 森本 玲, 茶木 辰治, 種本 雅之, 佐藤 文俊, 竹島 浩, 阿部 俊明, 伊藤 貞嘉, 阿部 高明

    日本腎臓学会誌 48 (3) 238-238 2006/04

    Publisher: (一社)日本腎臓学会

    ISSN: 0385-2385

  108. 塩酸サルポグレラートによる代謝作用の検討

    阿部 倫明, 鈴木 健弘, 石井 晶子, 豊原 敬文, 塩飽 浩美, 森本 玲, 茶木 辰治, 種本 雅之, 佐藤 文俊, 竹島 浩, 阿部 俊明, 伊藤 貞嘉, 阿部 高明

    日本内分泌学会雑誌 82 (1) 137-137 2006/04

    Publisher: (一社)日本内分泌学会

    ISSN: 0029-0661

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Books and Other Publications 6

  1. 【動脈・静脈の疾患2024(下)-最新の診断・治療動向-】動脈・静脈の疾患(臓器別)腎臓疾患 腎臓脈狭窄症

    金 沙織, 豊原 敬文, 田中 哲洋

    (株)日本臨床社 2024/07

  2. 【腸内細菌叢のバランス異常と疾患とのかかわりをつきとめろ】ミトコンドリア・腸内細菌連関 ミトコンドリア機能や腸内フローラが健康長寿の未来を決める

    豊原 敬文, 阿部 高明

    (同)クリニコ出版 2024/05

    ISBN: 9784910396446

  3. 【腎臓症候群(第3版)-その他の腎臓疾患を含めて-[I]】腎血管系障害 腎動脈線維筋性異形成

    豊原 敬文, 阿部 高明, 田中 哲洋

    (株)日本臨床社 2022/08

  4. 腎保護からみた降圧薬の選択—特集 降圧薬と臓器保護

    豊原 敬文, 伊藤 貞嘉

    大阪 : 医薬ジャーナル社 2008/09

  5. トランスポーター研究の新展開 医療現場におけるトランスポーター研究の応用

    阿部 高明, 豊原 敬文, 秋山 泰利, 阿部 倫明, 鈴木 健弘, 種本 雅之, 野口 直哉, 高沢 伸

    (公社)日本薬剤学会 2008/04

  6. 内科レジデントの鉄則

    聖路加国際病院内科チーフレジデント, 岡田, 定, 児玉, 知之, 豊原, 敬文, 和田, 匡史

    医学書院 2006/10

    ISBN: 9784260002417

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Presentations 5

  1. Hypoglycemia and hyperinsulinemia induced by phenolic uremic toxins in CKD and DKD patients

    Yoshiyasu Tongu, Tomoko Kasahara, Yasutoshi Akiyama, Hsin-Jung Ho, Yotaro Matsumoto, Ryota Kujirai, Koichi Kikuchi, Koji Nata, Makoto Kanzaki, Kenshin Suzuki, Shun Watanabe, Takafumi Toyohara, Takehiro Suzuki, Chiharu Kawabe, Chitose Suzuki, Tetsuhiro Tanaka, Jun Wada, Yoshihisa Tomioka, Takaaki ABE

    2024/03/04

    More details Close

    Abstract Patients with end-stage renal disease have lower fasting plasma glucose and HbA1c levels, with significantly higher insulin levels. For a long time, it has been believed that this higher insulin level in renal failure is due to decreased insulin clearance caused by reduced renal function. However, here we reported that accumulation of the gut microbiota-derived uremic toxin, phenyl sulfate (PS) in the renal failure, increased insulin secretion from the pancreas by enhanced glucose-induced insulin secretion. Other endogenous sulfides compounds which accumulated as in the renal failure also increased glucose-induced insulin secretion form b-cells. In addition, we also found that PS increased insulin resistance through lncRNA expression and Erk1/2 phosphorylation in the adipocytes. To confirm the relationship between PS and glucose metabolism in human, we recruited 2 clinical cohort studies (DKD and CKD), and found that here was a weak negative correlation between PS and HbA1c. Because these trials did not collect fasting insulin level, we alternatively used the urinary C-peptide/creatinine ratio (UCPCR) as an indicator of insulin resistance. We found that PS-induced insulin resistance in patients with eGFR &lt; 60 ml/min/1.73 m2. These data suggest that the accumulation of uremic toxins modulates glucose metabolism and induced insulin resistance in CKD and DKD patients.

  2. ヒトiPS 細胞由来3D 血管モデルを用いた動脈硬化発症機序の解明 Invited

    豊原敬文, 板井駿, 是方真悠子, 阿部高明, 田中哲洋

    第46回日本高血圧学会総会 2024

  3. 尿毒素フェニル硫酸はインスリン分泌を刺激し糖尿病性腎症におけるインスリン抵抗性を惹起する

    頓宮 慶泰, 笠原 朋子, 川邊 千陽, 鈴木 健新, 菊地 晃一, 三瀬 広記, 鯨井 涼太, 松本 洋太郎, 秋山 泰利, 渡邉 駿, 豊原 敬文, 鈴木 健弘, 和田 淳, 富岡 佳久, 田中 哲洋, 阿部 高明

    日本腎臓学会誌 2023/05

  4. 腎血管性高血圧の最新の知見 Invited

    豊原敬文, 阿部高明, 田中哲洋

    第53回日本腎臓学会東部学術大会 2023

  5. 患者由来iPS細胞を用いた新規動脈硬化抑制因子の発見と腎疾患への応用 Invited

    豊原敬文

    第94回日本生化学会大会 2021

Industrial Property Rights 3

  1. 管腔構造体,及び管腔構造体の製造方法

    尾上 弘晃, 田中 秀磨, 板井 駿, 豊原 敬文

    特許第7558544号

    Property Type: Patent

    Holder: 尾上 弘晃、田中 秀磨、板井 駿、豊原 敬文

  2. 腎前駆細胞の製造方法及び腎前駆細胞を含む医薬

    長船 健二, 豊原 敬文, 山岸 幸子

    特許第6450311号

    Property Type: Patent

  3. 腎前駆細胞の製造方法及び腎前駆細胞を含む医薬

    長船 健二, 豊原 敬文, 山岸 幸子

    Property Type: Patent

Research Projects 10

  1. Elucidating the pathological mechanism and developing the clinical markers for nephrosclerosis by iPS cells

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2024/04/01 - 2027/03/31

  2. Elucidation of the pathogenesis of moyamoya disease through Endothelial-Smooth Muscle Interaction and RNF213

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2023/04/01 - 2026/03/31

  3. Elucidation of the pathogenesis of ulcerative colitis using an early-onset model of human artificial intestine

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2022/04/01 - 2025/03/31

  4. リン脂質を調節する新規動脈硬化抑制系路を介した動脈防御戦略の国際共同研究

    Offer Organization: AMED

    System: 循環器疾患・糖尿病等生活習慣病対策実用化研究事業

    Institution: 国立大学法人東北大学

    2022/04 - 2025/03

  5. Development of mitochondria homing drug for kidney disease

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2021/04/01 - 2024/03/31

  6. Development of novel therapy for diabetic nephropathy using lipid metabolism

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2021/04/01 - 2024/03/31

  7. ミトコンドリアtRNA修飾核酸の網羅的測定による新規ミトコンドリア病診断法の確立

    秋山 泰利, 豊原 敬文

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(C)

    Institution: 東北大学

    2021/04/01 - 2024/03/31

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    本研究は、(1)ミトコンドリアからのtRNAsの効率的な抽出、(2) ミトコンドリア病患者から樹立したヘテロプラスミーの異なるiPS細胞クローンからの心筋誘導、(3) LC-MS/MSによる修飾核酸の一斉定量、の3項目を大きな柱としている。ミトコンドリアtRNAsの抽出に関しては最適化を進め、まず培養細胞のtotal RNAを用いてtRNAs特異的なプルダウンによるtRNAs抽出法の確立を行なった。さらにミトコンドリアRNAの簡易かつ効率的な精製の条件検討を行ない、前述のtRNAs抽出法がミトコンドリアtRNAsに対しても同様に効率よく行えることを確認した。iPS細胞からの心筋への誘導はクローンごとの誘導効率の差異が認められることから、クローン間の誘導効率の均一性を上昇させるためにさらなる検討を進めている。LC-MS/MSの測定系では、一斉定量可能な修飾核酸種の拡充を進めており、τm5s2U, ms2i6A, τm5U, f5Cといったミトコンドリア特異的な修飾核酸も測定系に加えることができた。実際ミトコンドリアRNAを培養細胞から抽出し、サンプル調整を行い測定を行うことで、これらの修飾核酸の検出および定量に成功した。 申請者の考案したtRNAsの濃縮法は、tRNAsの高次構造(tRNAの3'-CCA末端)特異的に結合するDNAオリゴと成熟tRNAsを連結させるものである。本研究の予備検討としてこの手法の最適化を行い、さらにこの手法を用いて、tRNAsの3'-CCA末端が細胞のストレスにより切断されることを明らかにした。以上の結果は本研究の重要な基礎データとなるものであり論文として報告を行なった。

  8. Developing the differentiation methods from pluripotent stem cells to glomerular endothelial cells for diabetic research

    Toyohara Takafumi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Research Activity Start-up

    Institution: Tohoku University

    2019/08/30 - 2021/03/31

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    In this project, we aimed to establish differentiation methods from pluripotent stem cells to glomerular endothelial cells for developing new therapy against diabetic nephropathy. We screened some growth factors existing at glomerulus that increase the expression of DKK2, one of the potential markers for glomerular endothelial cells. Some factors induced DKK2 when they were added at the late time point of the previous differentiation method (Patsch et al. Nat Cell Biol., 2015). Some factors also synergistically induced DKK2. DKK2 expression was more upregulated on the laminin 512-coating plate.

  9. Development of cell therapy using hiPS-derived nephron progenitors

    TOYOHARA Takafumi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Kyoto University

    2013/04/01 - 2015/03/31

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    In this study, we generated double reporter hiPSC lines, allowing us to monitor and isolate OSR1+SIX2+ nephron progenitors. We then established a multistep differentiation protocol from hiPSCs into OSR1+SIX2+ nephron progenitors with the induction efficiency nearly 40%. These human nephron progenitors differentiate into multiple renal epithelia including glomerular podocytes and tubular cells, and reconstitute three-dimensional renal structures in vitro and in vivo. Moreover, we found that renal subcapsular transplantation of hiPSC-derived OSR1+SIX2+ nephron progenitors ameliorated acute kidney injury in mice induced by ischemic reperfusion injury. Our results suggest that regenerative medicine strategies for kidney diseases could be developed using the hiPSC-derived renal cells.

  10. Development of differentiation methods from human pluripotent stemcells into renal progenitor cells

    TOYOHARA Takafumi, OSAFUNE Kenji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Kyoto University

    2011 - 2012

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    During the study period, we have generated double reporter human iPSC lines(OSR1-GFP/SIX2-tdTomato double knock-in hiPSC lines). We have also established adifferentiation protocol for inducing human OSR1(+) IM cells into SIX2(+) cells usinga combinational treatment of growth factors, which produces up to 30% SIX2(+) cells. TheseSIX2(+) cells expressed other marker genes for nephron progenitors and have similardevelopmental potential to those in embryos.

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Teaching Experience 6

  1. 基礎医学修練

  2. 高次臨床修練

  3. 高血圧チュートリアル

  4. 系統講義 腎臓内科学

  5. 臨床修練前準備実習

  6. 症候学チュートリアル

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