• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Elucidation of the mechanism of impaired insulin release in diabetes mellitus by the molecular cell biological techniques

Research Project

Project/Area Number 11670148
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Pathological medical chemistry
Research InstitutionKyorin University

Principal Investigator

NAGAMATSU Shinya  Kyorin University School of Medicine, Professor, 医学部, 教授 (80231489)

Co-Investigator(Kenkyū-buntansha) WATANABE Takashi  Kyorin University School of Medicine, Professor, 医学部, 教授 (00191768)
ISHIDA Hitoshi  Kyorin University School of Medicine, Professor, 医学部, 教授 (80212893)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2001: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1999: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsInsulin / GFP / Fusion / confocal microscoov / evanescent / secretory granule / diabetes mellitus / fusion / インスリン分泌 / Exocytosis / SNARE / Ca^<2+>
Research Abstract

In order to elucidate the mechanism of impaired insulin release in diabetes mellitus, we firstly investigated the expression of SNAREs and its related proteins in pancreatic β cells. We revealed that MIN6 β cells expressed syntaxin 1A, syntaxin 2 (epimorphin), synaptosomal associated protein of 25 kDa (SNAP25), vesicle associated membrane protein-2 (VAMP2 or synaptobrevin), synaptotagmin I, III, IV. To examine how these proteins are involved in the etiology and progression of diabetes mellitus, we examined the expression levels of syntaxin 1A and SNAP25 in pancreatic β cells of GK rats, type 2 DM animal model. These protein levels were decreased to about a half-fold that of control. Then, we tried to recover the decreased expression levels to the normal levels using recombinant adenovirus system. Infection of Adex 1CA-syntaxin 1A and Adex 1CA-SNAP25 with GK rat islets recovered these protein levels, thereby the impaired insulin release was partly normalized. Thus, our data strongly indicated the involvement of t-SNAREs expression in the etiology and progression of type 2-DM. We then investigated how endocytosis insulin secretory granules post fusion is associated with insulin release. For this purpose, we have cloned the novel-cellubrevin related peptide (NGRP), which was localized in the early endosome. To determine the functional role of NCRP (endobrevin) in the exocytosis of insulin, wild-type and dominant-negative endobrevin were overexpressed using adenovirus system. The data revealed that endobrevin plays a physiological role in the exo-endocytosis of insulin via an interaction between endocytic vesicles and the endosome. Finally, we developed the new strategy to detect the insulin fusion per se by fusion protein between insulin and pH-sensitive GFP mutant (pHluorin).

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] Mica Ohara-Imaizumi et al.: "Mastoparan Stimiulates GABA Release from MIN6 Cell : Relationship betweem SNARE Proteins and Mastoparan Action"Biochemical and Biophysical Research Communications. 289. 1025-1030 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shinya Nagamatsu et al.: "Adenovirus-mediated preproinsulin gene transfer into adipose tissues ameliorates hyperglycemia in obese diabetic KKAy mice"FEBS Lett.. 509. 106-110 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yasuo Shinoda et al.: "Expression of Sugar Transporters by In Vivo Electroporation and Particle Gun Methods in the Rat Liver : Localization to Specific Membrance Domain"Acta Histochem.Cytochem.. 34. 15-24 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 永松信哉, 石田均: "インスリン分泌機構と糖尿病"ニュー・サイエンス社. 5 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nagamatsu S, Watanabe T, Nakamichi Y, Yamamura C, Tsuzuki K, and Matsushima S: "a-soluble N-ethylmaleimide-sensitive factor attachment protein is expressed in pancreatic b-cells and functions in insulin, but g-aminobutyric acid secretion"J Biol Chem. 274. 8053-8060 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Watanabe T, Nagamatsu S, Matsushima S, Kirino T, Uchimura H: "Co-localization of GLUT3 and choline acetyltransferase immunoreactivity in the rat retina"Biochem. Biophys. Res. Commun.. 256. 505-511 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Watanabe T, Nagamatsu S, Matsushima S, Kondo K, Motobu H, Hirosawa K, Mabuchi K, Kinno T, Uchimura H: "Developmental expression of GLUT2 in the rat retina"Cell Tissue Res. 298. 217-223 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nakamichi Y, and Nagamatsu S: "a-SNAP functions in insulin exocytosis from mature, but not immature secretory granules in pancreatic b cells"Biochem. Biophys. Res. Commun.. 260. 127-132 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nagamatsu S, Nakamichi Y, Yamamura C, Matsushima S, Watanabe T, Ozawa S, Furukawa H, and Ishida H: "Decrcased expression of t-SNARE, syntaxin 1, and SNAP-25 in pancreatic b-cells is involved in impaired insulin secretion from diabetic GK rat islets."Diabetes. 48. 2367-2373 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shiokawa S, Sakai K, Akimoto Y, Suzuki N, Hanashi H, Nagamatsu S, Iwashita M, Nakamura Y, Hirano H, & Yoshimura Y: "Function of the Small Guanosine Triphosphate-Binding Protein RhoA in the Process of Implantation"J. Clin Endocrinol Metab. 85. 4742-4749 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nagamatsu S, Nakamichi Y, Watanabe T, Matsushima S, Yamaguchi S, Ni J, Itagaki E & Ishida H: "Localization of cellubrevin-related peptide, endobrevin, in the early endosome in pancreatic β cells and its physiological function in exo-endocytosis of secretory granules"J. Cell Science. 114. 219-227 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ohara-Imaizumi, Nakamichi Y, Ozawa S, Katsuta H, Ishida H, and Nagamatsu S: "Mastoparan Stimulates GABA Release from MIN6 Cells: Relationship between SNARE Proteins and Mastoparan Action"Biochem. Biophys. Res. Commun.. 289. 1025-1030 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nagamatsu S, Nakamichi Y, Ohara-Imaizumi M, Ozawa S, Katahira H, Watanabe T, Ishida H: "Adenovirus-mediated preproinsulin gene transfer into adipose tissues ameliorates hyperglyucemia in obese diabetic KKA mice"FEBS Lett. 509. 106-110 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Katahira H, Nagamatsu S, Ozawa S, Nakamichi Y Yamaguchi S, Furukawa H, Takizawa M, Yoshimoto K, Itagaki E, and Ishida H: "Acute Inhibition of Proinsulin Biosynthesis at the Translation Level by Palmitic Acid"Biochem. Biophys. Res. Commun.. 282. 507-510 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shinoda Y, Suzuki T, Sugawara-Yokoo M, Nagamatsu S, Kuwano H, and Takata K: "Expression of Sugar Transporters by In Vivo Electroporation and Particle Gun Methods in the Rat Liven Localization to Specific Membrane Domains"Acta Histochem. Cytochem.. 34. 15-24 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ohara-lmaizumi M, Nakamichi Y, Tanaka T, Ishida H, Nagamatsu S: "Imaging Exocytosis of Single Insulin Secretory Granules with Evanescent Wave Microscopy"J. Biol. Chem.. 277. 3805-3808 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Mica Ohara-Imaizui et al.: "Mastoparan Stimiulates GABA Release from MIN6 Cell : Relationship betweem SNARE Proteins and Mastoparan Action"Biochemical and Biophysical Research Communications. 289. 1025-1030 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Shinya Nagamatsu et al.: "Adenovirus-mediated preproinsulin gene transfer into adipose tissues ameliorates hyperglycemia in obese diabetic KKA^y mice"FEBS Lett.. 509. 106-110 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yasuo Shinoda et al.: "Expression of Sugar Transporters by In Vivo Electroporation and Particle Gun Methods in the Rat Liver : Localization to Specific Membrance Domains"Acta Histochem.Cytochem. 34. 15-24 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 永松信哉, 石田均: "インスリン分泌機構と糖尿病"ニュー・サイエンス社. 5 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nagamatsu S. et.al(8人中1番目): "Localization of cellubrevin-related peptide, endobrevin, in the early endosome in pancreatic β cells and its physiological function in exo-endocytosis of secretory granules."J.Cell.Sci.. 114. 219-227 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Shiokawa S.Nagamatsu. et.al(10人中6番目): "Function of the Small Guanosine Triphosphate-Binding Protein RhoA in the Process of Implantation."J.Clin.Endocrinol.Metab.. 85. 4742-4749 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 永松信哉: "インスリン開口放出の分子機構"医学のあゆみ. 192. 365-368 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 永松信哉: "インスリン分泌顆粒放出機構の分子生物学"Diabetis Frontier. 11. 243-248 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 石田均,永松信哉: "糖尿病学2000"インスリン分泌機構-現状と今後の課題-. 12 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nagamatsu S,他: "Decreased expression of t-SNAREs,Syntaxin 1 and SNAP-25,in pancreatic β-cells is involved in impaired insulin secretion from diabetic GK rat islets."Diabetes. 48. 2367-2373 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Nakamichi Y,Nagamatsu S: "α-SNAP functions in insulin exocytosis from mature,but not immature secretory granules in pancreatic β-cells."Biochem. Biophys. Res. Commun.. 260. 127-132 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Watanabe T,Nagamatsu S,他: "Co-localization of GLUT3 and choline acetyltransferase innunoreactivity in the rat retina,"Biochem. Biophys. Res. Commun.. 256. 505-511 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Nagamatsu S,他: "α-soluble N-ethylmaleimide-sensitive factor attachmentprotein is expressed in pancreatic β-cells and iunctions in insulin,but γ-aminobutric acid secretion."J. Biol. Chem.. 274. 8053-8060 (1999)

    • Related Report
      1999 Annual Research Report

URL: 

Published: 1999-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi