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• W2012122215 abstract "Integrin-extracellular matrix interactions are important determinants of beta cell behaviours. The β1 integrin is a well-known regulator of beta cell activities; however, little is known of its associated α subunits. In the present study, αβ1 integrin expression was examined in the rat insulinoma cell line (INS-1) to identify their role in beta cell survival and function. Seven α subunits associated with β1 integrin were identified, including α1-6 and αV. Among these heterodimers, α3β1 was most highly expressed. Common ligands for the α3β1 integrin, including fibronectin, laminin, collagen I and collagen IV were tested to identify the most suitable matrix for INS-1 cell proliferation and function. Cells exposed to collagen I and IV demonstrated significant increases in adhesion, spreading, cell viability, proliferation, and FAK phosphorylation when compared to cells cultured on fibronectin, laminin and controls. Integrin-dependent attachment also had a beneficial effect on beta cell function, increasing Pdx-1 and insulin gene and protein expression on collagens I and IV, in parallel with increased basal insulin release and enhanced insulin secretion upon high glucose challenge. Furthermore, functional blockade of α3β1 integrin decreased cell adhesion, spreading and viability on both collagens and reduced Pdx-1 and insulin expression, indicating that its interactions with collagen matrices are important for beta cell survival and function. These results demonstrate that specific αβ1 integrin-ECM interactions are critical regulators of INS-1 beta cell survival and function and will be important in designing optimal conditions for cell-based therapies for diabetes treatment." @default.
• W2012122215 created "2016-06-24" @default.
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• W2012122215 creator A5038646281 @default.
• W2012122215 creator A5038934949 @default.
• W2012122215 creator A5040917810 @default.
• W2012122215 date "2008-11-21" @default.
• W2012122215 modified "2023-10-12" @default.
• W2012122215 title "Expression and function of αβ1 integrins in pancretic beta (INS-1) cells" @default.
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• W2012122215 doi "https://doi.org/10.1007/s12079-008-0030-6" @default.
• W2012122215 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2648043" @default.
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