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- W3097263684 abstract "Background: Deleterious effects of high levels of free fatty acids lead to a phenomenon known as “lipotoxicity”, associated with insulin resistance and beta pancreatic cell damage, key events in development of type 2 diabetes mellitus. Lipotoxicity has been associated with cellular oxidative stress and beta-cell apoptosis. Caveolin-1 is a membrane protein that has been associated with many cellular functions as cell signalling regulation and apoptosis, and it is normally present in beta pancreatic cells. We previously reported that the expression of the membrane protein Caveolin-1 promotes free fatty acids-induced apoptosis in vitro in a mouse beta cell line; remains to be elucidated if this phenomenon is relevant in vivo.Methods: We used C57BL6J mice lacking expression of Caveolin-1 (CAV-1 K.O. mice). We evaluated free fatty acids and triglycerides levels in blood in fasting conditions, oral glucose tolerance test (OTTG), carbonylated proteins in serum and C-peptide in wild type (WT) and Caveolin-1 K.O. and wild type mice exposed to a high fat diet for three months. Also, the presence of apoptosis was evaluated by TUNEL staining in beta pancreatic islets.Results: The results indicated that we found that CAV-1 K.O. mice fed with high fat diet showed higher levels of triglycerides, cholesterol, free fatty acids and carbonylated proteins, although also a better response OGTT and C-peptide levels. Islets from K.O. mice showed lower levels of apoptosis.Conclusion: Although K.O. mice showed a lipotoxic profile, our results suggest that their pancreatic islets were more resistant to the high fat diet deleterious effects over beta cells" @default.
- W3097263684 created "2020-11-09" @default.
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- W3097263684 date "2020-01-01" @default.
- W3097263684 modified "2023-09-23" @default.
- W3097263684 title "Caveolin-1 K.O. Mice exposed to high fat diet exhibit a lipotoxic milieu but less beta pancreatic damage compared with wild type mice" @default.
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