Analysis of the mechanisms of incretin secretion: similarities or differences of GIP and GLP-1 secretion
Project/Area Number |
16H05326
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Metabolomics
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Research Institution | Kyoto University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
原田 範雄 京都大学, 医学研究科, 講師 (50530169)
林 良敬 名古屋大学, 環境医学研究所, 准教授 (80420363)
山根 俊介 京都大学, 医学研究科, 助教 (90582156)
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Project Period (FY) |
2016-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2018: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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Keywords | インクレチン分泌 / インクレチン / GIP / GLP-1 / K細胞 / L細胞 / Incretin |
Outline of Final Research Achievements |
We examined FABP5 localization in K-cells before and after oral fat intake using electron microscopy and confocal microscopy.FABP5 was present both in the nucleus and in the cytoplasm of K-cells before loading. In contrast, 60 minutes after fat loading, the intranuclear localization has disappeared. The expression of Regulator of G protein signaling 4(RGS4) was found to be elevated in the K cells of FABP5-deficient mouse. We clarified that both GPR120 and GPR40 are involved in GIP secretion after fat intake. It is suggested that GPR40 expressed in K-cells directly sense LCFA, and in contrast, GPR120 expressed in I-cells indirectly regulates GIP secretion in the presence of bile via CCK secretion.We also obtained results suggesting that carbonic anhydrase 8 (Car8), which shows high expression in L-cells, negatively regulates GLP-1 secretion in response to fatty acid stimulation.
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Academic Significance and Societal Importance of the Research Achievements |
肥満・2型糖尿病患者の数は増加の一途をたどっており、全世界的に重要な健康問題であるが、有効かつ安全性の高い治療法は未だ確立されていないのが現状である。本研究で注目しているインクレチンはその治療標的として大変有望であり、GIP制御に関わる重要な分子としてFABP5に、GLP-1分泌制御に関与するものとしてCar8に着目し、作用機構の解明に着手している。本研究の結果、薬剤によるFABP5、Car8の制御を介してインクレチン分泌制御が可能となれば、糖尿病・肥満症の新たな治療法の開発、創薬につながることが期待され研究の意義は大きい。
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Report
(4 results)
Research Products
(48 results)
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[Journal Article] Sphingosine kinase 1-interacting protein is a dual regulator of insulin and incretin secretion2019
Author(s)
Liu Y, Harashima SI, Wang Y, Suzuki K, Tokumoto S, Usui R, Tatsuoka H, Tanaka D, Yabe D, Harada N, Hayashi Y, Inagaki N.
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Journal Title
FASEB J.
Volume: 33
Issue: 5
Pages: 6239-6253
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Medium-chain triglyceride diet stimulates less GIP secretion and suppresses body weight and fat mass gain compared with long-chain triglyceride diet.2019
Author(s)
Murata Y, Harada N, Yamane S, Iwasaki K, Ikeguchi E, Kanemaru Y, Harada T, Sankoda A, Shimazu-Kuwahara S, Joo E, Poudyal H, Inagaki N.
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Journal Title
Am J Physiol Endocrinol Metab.
Volume: accept
Pages: 0-0
Related Report
Peer Reviewed
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[Journal Article] Transcriptional factor Pdx1 is involved in age-related GIP hypersecretion in mice.2018
Author(s)
Ikeguchi E, Harada N, Kanemaru Y, Sankoda A, Yamane S, Iwasaki K, Imajo M, Murata Y, Suzuki K, Joo E, Inagaki N.
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Journal Title
Am J Physiol Gastrointest Liver Physiol.
Volume: 315
Issue: 2
Pages: 272-272
DOI
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Peer Reviewed
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[Journal Article] Dietary habits associated with reduced insulin resistance: The Nagahama Study.2018
Author(s)
Ikeda K, Sato T, Nakayama T, Tanaka D, Nagashima K, Mano F, Joo E, Fujimoto S, Takahashi Y, Kosugi S, Sekine A, Tabara Y, Matsuda F, Inagaki N; Nagahama Study Group.
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Journal Title
Diabetes Res Clin Pract
Volume: In press
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Peer Reviewed
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[Journal Article] Glucose-dependent insulinotropic polypeptide is required for moderate high fat diet, but not high carbohydrate diet-induced weight gain.2018
Author(s)
Maekawa R, Ogata H, Murase M, Harada N, Suzuki K, Joo E, Sankoda A, Iida A, Izumoto T, Tsunekawa S, Hamada Y, Oiso Y, Inagaki N, Arima H, Hayashi Y, Seino Y.
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Journal Title
Am J Physiol Endocrinol Metab.
Volume: 6
Issue: 6
Pages: 111-112
DOI
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Peer Reviewed / Open Access
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[Journal Article] Prevalence of Cardiovascular Disease and Its Risk Factors in Primary Aldosteronism: A Multicenter Study in Japan.2018
Author(s)
Ohno, Y., Sone, M., Inagaki, N., Yamasaki, T., Ogawa, O., Takeda, Y., Kurihara, I., Itoh, H., Umakoshi, H., Tsuiki, M., et al.
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Journal Title
Hypertension
Volume: 71
Issue: 3
Pages: 530-537
DOI
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Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Evaluation of 18F-labeled exendin(9-39) derivatives targeting glucagon-like peptide-1 receptor for pancreatic β-cell imaging.2018
Author(s)
Kimura H, Ogawa Y, Fujimoto H, Mukai E, Kawashima H, Arimitsu K, Toyoda K, Fujita N, Yagi Y, Hamamatsu K, Murakami T, Murakami A, Ono M, Nakamoto Y, Togashi K, Inagaki N, Saji H.
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Journal Title
Bioorganic & Medicinal Chemistry
Volume: 26
Issue: 2
Pages: 463-469
DOI
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Peer Reviewed
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[Journal Article] Significance of dopamine D1 receptor signalling for steroidogenic differentiation of human induced pluripotent stem cells.2017
Author(s)
Matsuo K, Sone M, Honda-Kohmo K, Toyohara T, Sonoyama T, Taura D, Kojima K, Fukuda Y, Ohno Y, Inoue M, Ohta A, Osafune K, Nakao K, Inagaki N.
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Journal Title
Sci Rep.
Volume: Nov 9;7(1)
Issue: 1
Pages: 15120-15120
DOI
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Peer Reviewed / Open Access
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[Journal Article] Glucose-lowering effects and safety of DS-8500a, a G protein-coupled receptor 119 agonist, in Japanese patients with type 2 diabetes: results of a randomized, double-blind, placebo-controlled, parallel-group, multicenter, phase II study.2017
Author(s)
Inagaki N, Chou HS, Tsukiyama S, Washio T, Shiosakai K, Nakatsuka Y, Taguchi T.
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Journal Title
BMJ Open Diabetes Res Care
Volume: 5(1)
Issue: 1
Pages: e000424-e000424
DOI
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Peer Reviewed / Open Access
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[Journal Article] Circulating osteocrin stimulates bone growth by limiting C-type natriuretic peptide clearance.2017
Author(s)
Kanai Y, Yasoda A, Mori KP, Watanabe-Takano H, Nagai-Okatani C, Yamashita Y, Hirota K, Ueda Y, Yamauchi I, Kondo E, Yamanaka S, Sakane Y, Nakao K, Fujii T, Yokoi H, Minamino N, Mukoyama M, Mochizuki N, Inagaki N.
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Journal Title
Journal of Clinical Investigation
Volume: 127
Issue: 11
Pages: 4136-4147
DOI
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Peer Reviewed / Open Access
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[Journal Article] Long chain free fatty acid receptor GPR120 mediates oil-induced GIP secretion through CCK in male mice.2017
Author(s)
19.Sankoda A, Harada N, Iwasaki K, Yamane S, Murata Y, Shibue K, Thewjitcharoen Y, Suzuki K, Harada T, Kanemaru Y, Shimazu-Kuwahara S, Hirasawa A, Inagaki N.
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Journal Title
Endocrinology.
Volume: In press
Issue: 5
Pages: 0-0
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Myotonic dystrophy type 1 patient-derived iPSCs for the investigation of CTG repeat instability.2017
Author(s)
Ueki J, Nakamori M, Nakamura M, Nishikawa M, Yoshida Y, Tanaka A, Morizane A, Kamon M, Araki T, Takahashi MP, Watanabe A, Inagaki N, Sakurai H.
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Journal Title
Sci Rep.
Volume: 13
Issue: 1
Pages: 42522-42522
DOI
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Peer Reviewed / Open Access
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[Journal Article] Inhibition of Gastric Inhibitory Polypeptide Receptor Signaling in Adipose Tissue Reduces Insulin Resistance and Hepatic Steatosis in High-Fat Diet-Fed Mice.2017
Author(s)
Joo E, Harada N, Yamane S, Fukushima T, Taura D, Iwasaki K, Sankoda A, Shibue K, Harada T, Suzuki K, Hamasaki A, Inagaki N.
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Journal Title
Diabetes.
Volume: 66
Issue: 4
Pages: 868-868
DOI
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] C-type natriuretic peptide restores impaired skeletal growth in a murine model of glucocorticoid-induced growth retardation.2016
Author(s)
Ueda Y, Yasoda A, Yamashita Y, Kanai Y, Hirota K, Yamauchi I, Kondo E, Sakane Y, Yamanaka S, Nakao K, Fujii T, Inagaki N.
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Journal Title
Bone.
Volume: 92
Pages: 157-157
DOI
Related Report
Peer Reviewed
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[Journal Article] Src regulates insulin secretion and glucose metabolism by influencing subcellular localization of glucokinase in pancreatic β-cells.2016
Author(s)
Sato H, Nagashima K, Ogura M, Sato Y, Tahara Y, Ogura K, Yamano G, Sugizaki K, Fujita N, Tatsuoka H, Usui R, Mukai E, Fujimoto S, Inagaki N.
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Journal Title
Journal of Diabetes Investigation
Volume: 7
Issue: 2
Pages: 171-178
DOI
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] 転写因子Pancreatic duodenal homeobox-1(Pdx1)は加齢に伴うGIP分泌亢進に関与する2018
Author(s)
池口 絵理, 原田 範雄, 金丸 良徳, 三小田 亜希子, 山根 俊介, 岩﨑 可南子, 今城 正道, 村田 由貴, 鈴木 和代, 城尾 恵里奈, 稲垣 暢也.
Organizer
第31回日本糖尿病・肥満動物学会学術集会
Related Report
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[Presentation] Long chain free fatty acid receptor GPR120 mediates oil-induced GIP secretion through CCK in mice.2017
Author(s)
Sankoda A, Harada N, Iwasaki K, Yamane S, Murata Y, Shibue K, Thewjitcharoen Y, Suzuki K, Harada T, Kanemaru Y, Shimazu-Kuwahara S, Hirasawa A, Inagaki N.
Organizer
Asia Islet Biology and Incretin Symposium
Related Report
Int'l Joint Research
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[Presentation] 長鎖脂肪酸受容体GPR120とGPR40は異なる機序で脂肪摂取時のGIP分泌に関与する2017
Author(s)
三小田 亜希子, 原田 範雄, 岩﨑 可南子, 山根 俊介, 村田 由貴, 金丸 良徳, 鈴木 和代, 渋江 公尊, 原田 貴成, 城尾 恵里奈, 平澤 明, 稲垣 暢也.
Organizer
第60回日本糖尿病学会年次学術集会
Related Report
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[Presentation] 過食肥満下におけるインクレチンGIPの生体内への影響について2017
Author(s)
桑原 智子, 原田 範雄, 金丸 良徳, 山根 俊介, 村田 由貴, 三小田 亜希子, 岩崎 可南子, 城尾 恵里奈, 渋江 公尊, 原田 貴成, 池口 絵理, 藤原 雄太, 稲垣 暢也.
Organizer
第60回日本糖尿病学会年次学術集会
Related Report
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