Cited by 316Pancreatic function and diabetesDiabetes Treatment and ManagementDiabetes and associated disorders

Insulin Signaling in α Cells Modulates Glucagon Secretion In Vivo

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Kawamori, Dan, Kurpad, Amarnath J., Hu, Jiang, Liew, Chong Wee, Shih, Judy L., Ford, Eric L., Herrera, Pedro L., Polonsky, Kenneth S. +2 more·2009·Cell Metabolism

Abstract

Glucagon plays an important role in glucose homeostasis by regulating hepatic glucose output in both normo- and hypoglycemic conditions. In this study, we created and characterized alpha cell-specific insulin receptor knockout (alphaIRKO) mice to directly explore the role of insulin signaling in the regulation of glucagon secretion in vivo. Adult male alphaIRKO mice exhibited mild glucose intolerance, hyperglycemia, and hyperglucagonemia in the fed state and enhanced glucagon secretion in response to L-arginine stimulation. Hyperinsulinemic-hypoglycemic clamp studies revealed an enhanced glucagon secretory response and an abnormal norepinephrine response to hypoglycemia in alphaIRKO mice. The mutants also exhibited an age-dependent increase in beta cell mass. Furthermore, siRNA-mediated knockdown of insulin receptor in glucagon-secreting InR1G cells promoted enhanced glucagon secretion and complemented our in vivo findings. Together, these data indicate a significant role for intraislet insulin signaling in the regulation of alpha cell function in both normo- and hypoglycemic conditions.

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Crossref · 10.1016/j.cmet.2009.02.007

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Authors
Kawamori, D., Kurpad, A. J., Hu, J., Liew, C. W., Shih, J. L., Ford, E. L., Herrera, P. L., Polonsky, K. S., McGuinness, O. P., & Kulkarni, R. N.
Affiliations
  • Joslin Diabetes Center (US)
  • Washington University in St. Louis (US)
  • University of Geneva (CH)
  • Vanderbilt University (US)
Corresponding author
Kulkarni, Rohit N.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2009-04
Volume
9
Issue
4
Pages
350-361
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2054111620
Cited by
316
References
65
Citations by year
2026: 13 · 2025: 13 · 2024: 12 · 2023: 12 · 2022: 17 · 2021: 22 · 2020: 17 · 2019: 22 · 2018: 20 · 2017: 19 · 2016: 15 · 2015: 24 · 2014: 27 · 2013: 16 · 2012: 18
FWCI
22.39
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (publishedVersion, other-oa)
  • PubMed Central (acceptedVersion)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
Funders
  • National Institutes of Health (UL1TR000448, 5p60dk020593-31)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P60-DK020593, R01DK031842, DK-31842, DK59637, DK56341, DK 20593, U24DK059637, DK-67536, R37DK031842, P30DK036836, P30DK056341, R01DK067536, P30DK020593)
  • National Center for Research Resources (UL1RR024992)
  • National Center for Advancing Translational Sciences
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
insulin signaling, alpha cells, glucagon secretion, insulin receptor, glucose homeostasis, hyperglucagonemia, hypoglycemia, norepinephrine, beta-cell mass, hepatic glucose production
MeSH terms
Animals, Arginine, Diabetes Mellitus, Experimental, Fasting, Feeding Behavior, Gene Expression Regulation, Glucagon, Hyperinsulinism, Hypoglycemia, Insulin, Organ Specificity, Organ Size, Receptor, Insulin, Streptozocin, Signal Transduction, Glucose Intolerance, Mice, Knockout, Glucagon-Secreting Cells, Insulin-Secreting Cells, Mice

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