Cited by 264Pancreatic function and diabetesDiabetes Treatment and ManagementDiabetes and associated disorders

Glucose or Insulin, but not Zinc Ions, Inhibit Glucagon Secretion From Mouse Pancreatic α-Cells

Ravier, Magalie A., Rutter, Guy A.·2005·Diabetes

Abstract

The mechanisms by which hypoglycemia stimulates glucagon release are still poorly understood. In particular, the relative importance of direct metabolic coupling versus paracrine regulation by β-cell secretory products is unresolved. Here, we compare the responses to glucose of 1) α-cells within the intact mouse islet, 2) dissociated α-cells, and 3) clonal αTC1-9 cells. Free cytosolic concentrations of ATP ([ATP]c) or Ca2+ ([Ca2+]c) were imaged using α-cell–targeted firefly luciferase or a green fluorescent protein–based Ca2+ probe (“pericam”), respectively. Consistent with a direct effect of glucose on α-cell oxidative metabolism, an increase in glucose concentration (from 0 or 3 mmol/l to 20 mmol/l) increased [ATP]c by 7–9% in α-cells within the intact islet and by ∼4% in αTC1-9 cells. Moreover, glucose also dose-dependently decreased the frequency of [Ca2+]c oscillations in both dissociated α-cells and αTC1-9 cells. Although the effects of glucose were mimicked by exogenous insulin, they were preserved when insulin signaling was blocked with wortmannin. Addition of ZnCl2 slightly increased the frequency of [Ca2+]c oscillations but failed to affect glucagon release from either islets or αTC1-9 cells under most conditions. We conclude that glucose and insulin, but not Zn2+ ions, independently suppress glucagon secretion in the mouse.

Integrity signals

Registry

Crossref · 10.2337/diabetes.54.6.1789

Cites

55 of 55 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Ravier, M. A., & Rutter, G. A.
Affiliations
University of Bristol (GB)
Venue
Diabetes
Published
2005-06-01
Volume
54
Issue
6
Pages
1789-1797
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2166243077
Cited by
264
References
55
Citations by year
2026: 3 · 2025: 3 · 2024: 6 · 2023: 8 · 2022: 9 · 2021: 17 · 2020: 10 · 2019: 8 · 2018: 9 · 2017: 11 · 2016: 14 · 2015: 9 · 2014: 20 · 2013: 16 · 2012: 16
FWCI
14.59
Type
journal article
Language
en
Open access
closed
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
Keywords
glucagon secretion, alpha cells, glucose, insulin, zinc ions, hypoglycemia, calcium oscillations, ATP, wortmannin, insulin signaling, islets, paracrine regulation, metabolic coupling
MeSH terms
Adenosine Triphosphate, Animals, Calcium, Cell Line, Cells, Cultured, Clone Cells, Glucagon, Glucose, Insulin, Islets of Langerhans, Zinc, Mice

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review