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Syntaxin 4 Expression in Pancreatic β-Cells Promotes Islet Function and Protects Functional β-Cell Mass.

Publication ,  Journal Article
Oh, E; Ahn, M; Afelik, S; Becker, TC; Roep, BO; Thurmond, DC
Published in: Diabetes
December 2018

Syntaxin 4 (Stx4) enrichment in human and mouse islet grafts improves the success of transplants in reversing streptozotocin (STZ)-induced diabetes in mice, although the underlying molecular mechanisms remain elusive. Toward a further understanding of this, human islets and inducible transgenic mice that selectively overexpress Stx4 in islet β-cells (βTG-Stx4) were challenged with proinflammatory stressors in vitro and in vivo. Remarkably, βTG-Stx4 mice resisted the loss of β-cell mass and the glucose intolerance that multiple low doses of STZ induce. Under standard conditions, glucose tolerance was enhanced and mice maintained normal fasting glycemia and insulinemia. Conversely, Stx4 heterozygous knockout mice succumbed rapidly to STZ-induced glucose intolerance compared with their wild-type littermates. Human islet β-cells overexpressing Stx4 exhibited enhanced insulin secretory capability; resilience against proinflammatory cytokine-induced apoptosis; and reduced expression of the CXCL9, CXCL10, and CXCL11 genes coordinate with decreased activation/nuclear localization of nuclear factor-κB. Finding ways to boost Stx4 expression presents a novel potential therapeutic avenue for promoting islet function and preserving β-cell mass.

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Published In

Diabetes

DOI

EISSN

1939-327X

Publication Date

December 2018

Volume

67

Issue

12

Start / End Page

2626 / 2639

Location

United States

Related Subject Headings

  • Qa-SNARE Proteins
  • Mice, Knockout
  • Mice
  • Insulin-Secreting Cells
  • Humans
  • Glucose Intolerance
  • Endocrinology & Metabolism
  • Diabetes Mellitus, Experimental
  • Cytokines
  • Blood Glucose
 

Citation

APA
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Oh, E., Ahn, M., Afelik, S., Becker, T. C., Roep, B. O., & Thurmond, D. C. (2018). Syntaxin 4 Expression in Pancreatic β-Cells Promotes Islet Function and Protects Functional β-Cell Mass. Diabetes, 67(12), 2626–2639. https://doi.org/10.2337/db18-0259
Oh, Eunjin, Miwon Ahn, Solomon Afelik, Thomas C. Becker, Bart O. Roep, and Debbie C. Thurmond. “Syntaxin 4 Expression in Pancreatic β-Cells Promotes Islet Function and Protects Functional β-Cell Mass.Diabetes 67, no. 12 (December 2018): 2626–39. https://doi.org/10.2337/db18-0259.
Oh E, Ahn M, Afelik S, Becker TC, Roep BO, Thurmond DC. Syntaxin 4 Expression in Pancreatic β-Cells Promotes Islet Function and Protects Functional β-Cell Mass. Diabetes. 2018 Dec;67(12):2626–39.
Oh, Eunjin, et al. “Syntaxin 4 Expression in Pancreatic β-Cells Promotes Islet Function and Protects Functional β-Cell Mass.Diabetes, vol. 67, no. 12, Dec. 2018, pp. 2626–39. Pubmed, doi:10.2337/db18-0259.
Oh E, Ahn M, Afelik S, Becker TC, Roep BO, Thurmond DC. Syntaxin 4 Expression in Pancreatic β-Cells Promotes Islet Function and Protects Functional β-Cell Mass. Diabetes. 2018 Dec;67(12):2626–2639.

Published In

Diabetes

DOI

EISSN

1939-327X

Publication Date

December 2018

Volume

67

Issue

12

Start / End Page

2626 / 2639

Location

United States

Related Subject Headings

  • Qa-SNARE Proteins
  • Mice, Knockout
  • Mice
  • Insulin-Secreting Cells
  • Humans
  • Glucose Intolerance
  • Endocrinology & Metabolism
  • Diabetes Mellitus, Experimental
  • Cytokines
  • Blood Glucose