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- W2038030189 abstract "The aim of this study was to investigate whether strain-dependent differences in beta-cell sensitivity to interleukin (IL) 1 beta exist in vitro and in vivo and if so, whether these differences correlate to variations in IL-1 beta-induced islet inducible nitric oxide synthase (iNOS) mRNA expression and nitrite production in vitro and islet iNOS protein content in vivo. Isolated islets of Langerhans in vitro from Wistar-Kyoto/Møllegården (WK/Mol) rats were sensitive to the inhibitory effect of IL-1 beta on accumulated and acute insulin secretion, whereas islets from Brown Norway/Charles River (BN/CR) rats were resistant. Furthermore, IL-1 beta induced higher islet iNOS mRNA expression and nitric oxide production from WK/Mol islets compared with BN/CR islets. WK/Mol, WK/CR, BN/Mol, BN/CR, and Lewis-Scripps/Mol (LS/Mol) rats received one daily injection of recombinant human IL-1 beta (4.0 microg/kg) or vehicle for 5 days. All the strains investigated were susceptible to IL-1 beta-induced changes in body weight, food intake, temperature, and plasma glucagon and corticosterone. However, IL-1 beta induced hyperglycemia and impairment of beta-cell glucose responsiveness in WK/Mol and LS/Mol rats, but not in BN rats. Furthermore, IL-l beta-induced islet iNOS expression in vivo determined by immunostaining was greater in WK/Mol rats compared with WK/CR and BN/CR rats. No restriction fragment length polymorphisms, using 20 restriction enzymes, were identified in the iNOS gene in six rat strains including BioBreeding rats. In conclusion, the relative resistance of BN rat islets to IL-1 beta-induced inhibition of beta-cell function in vitro was associated with lower islet iNOS mRNA expression and nitrite production in this strain. Further, the resistance of BN rats to IL-1 beta-induced hyperglycemia was associated with a lower islet iNOS expression in vivo." @default.
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- W2038030189 date "1996-06-01" @default.
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- W2038030189 title "Strain-Dependent Differences in Sensitivity of Rat β-Cells to Interleukin 1β In Vitro and In Vivo" @default.
- W2038030189 doi "https://doi.org/10.2337/diab.45.6.771" @default.
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