Insulin protects acinar cells during pancreatitis by preserving glycolytic ATP supply to calcium pumps
AuthorsBruce, Jason I. E.; orcid: 0000-0002-4503-1981; email: firstname.lastname@example.org
Sans, Maria Dolors; orcid: 0000-0002-9271-2106
Sugden, Sarah A.
James, Andrew D.; orcid: 0000-0002-2432-5948
Williams, John A.
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AbstractAbstract: Acute pancreatitis (AP) is serious inflammatory disease of the pancreas. Accumulating evidence links diabetes with severity of AP, suggesting that endogenous insulin may be protective. We investigated this putative protective effect of insulin during cellular and in vivo models of AP in diabetic mice (Ins2Akita) and Pancreatic Acinar cell-specific Conditional Insulin Receptor Knock Out mice (PACIRKO). Caerulein and palmitoleic acid (POA)/ethanol-induced pancreatitis was more severe in both Ins2Akita and PACIRKO vs control mice, suggesting that endogenous insulin directly protects acinar cells in vivo. In isolated pancreatic acinar cells, insulin induced Akt-mediated phosphorylation of 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 2 (PFKFB2) which upregulated glycolysis thereby preventing POA-induced ATP depletion, inhibition of the ATP-dependent plasma membrane Ca2+ ATPase (PMCA) and cytotoxic Ca2+ overload. These data provide the first mechanistic link between diabetes and severity of AP and suggest that phosphorylation of PFKFB2 may represent a potential therapeutic strategy for treatment of AP.
CitationNature Communications, volume 12, issue 1, page 4386
PublisherNature Publishing Group UK
DescriptionFrom Springer Nature via Jisc Publications Router
History: received 2020-02-17, accepted 2021-06-11, registration 2021-06-23, pub-electronic 2021-07-19, online 2021-07-19, collection 2021-12
Publication status: Published
Funder: U.S. Department of Health & Human Services | NIH | National Institute of Diabetes and Digestive and Kidney Diseases (National Institute of Diabetes & Digestive & Kidney Diseases); doi: https://doi.org/10.13039/100000062; Grant(s): DK-059578