Journal
CELL REPORTS
Volume 3, Issue 2, Pages 401-410Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2013.01.007
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Funding
- NIH [RO1 DK 067536]
- Societe Francophone du Diabete
- Association Francaise des Diabetiques
- American Diabetes Association
- Burroughs Wellcome Fund [NIH 5 P30 DK36836-20, NIH 1 DP2 OD004345]
- Harvard Stem Cell Institute Seed Grant
- Juvenile Diabetes Research Foundation/Sanofi Aventis Strategic Alliance [17-2011-644]
- [R01 DK 074795]
- Grants-in-Aid for Scientific Research [23591309] Funding Source: KAKEN
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Integrative organ crosstalk regulates key aspects of energy homeostasis, and its dysregulation may underlie metabolic disorders such as obesity and diabetes. To test the hypothesis that crosstalk between the liver and pancreatic islets modulates beta cell growth in response to insulin resistance, we used the liver-specific insulin receptor knockout (LIRKO) mouse, a unique model that exhibits dramatic islet hyperplasia. Using complementary in vivo parabiosis and transplantation assays, as well as in vitro islet culture approaches, we demonstrate that humoral, nonneural, non-cell-autonomous factor(s) induces beta cell proliferation in LIRKO mice. Furthermore, we report that a hepatocyte-derived factor(s) stimulates mouse and human beta cell proliferation in ex vivo assays, independent of ambient glucose and insulin levels. These data implicate the liver as a critical source of beta cell growth factor(s) in insulin-resistant states.
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