The aim of this article was to investigate the influence and the related mechanism of the Retn gene on glucose uptake and insulin resistance in 3T3-L1 cells.Radioimmunoassay was used to determine glucose uptake in 3T3...The aim of this article was to investigate the influence and the related mechanism of the Retn gene on glucose uptake and insulin resistance in 3T3-L1 cells.Radioimmunoassay was used to determine glucose uptake in 3T3-L1 cells with different Retn gene expression levels,whether cells were stimulated by insulin or not.RT-PCR and real-time RT-PCR analysis were used to determine the mRNA levels of several glucose transport proteins in 3T3-L1 cells with different Retn gene expression levels,including insulin receptor substrate-1(IRS-1),phosphatidylinositol 3-kinase(PI-3K),AKT-2,glucose transporter-4(GLUT-4),p38 mitogen-activated protein kinase(p38MAPK)and glycogen synthase kinase-3b(GSK-3b).The glucose uptake decreased with the increase in Retn gene expression in 3T3-L1 cells,which was independent of whether the cells were stimulated by insulin or not.The mRNA expression of two signal proteins PI-3K and AKT-2 decreased and the other two signal proteins,GSK-3b and p38MAPK,increased with Retn overexpression in 3T3-L1 cells.Resistin could induce insulin resistance in adipocytes,which might be related to the changes of some proteins in PI-3K and Ras pathways.展开更多
基金The study was supported by the National Natural Science Foundation of China(Grant No.30370802).
文摘The aim of this article was to investigate the influence and the related mechanism of the Retn gene on glucose uptake and insulin resistance in 3T3-L1 cells.Radioimmunoassay was used to determine glucose uptake in 3T3-L1 cells with different Retn gene expression levels,whether cells were stimulated by insulin or not.RT-PCR and real-time RT-PCR analysis were used to determine the mRNA levels of several glucose transport proteins in 3T3-L1 cells with different Retn gene expression levels,including insulin receptor substrate-1(IRS-1),phosphatidylinositol 3-kinase(PI-3K),AKT-2,glucose transporter-4(GLUT-4),p38 mitogen-activated protein kinase(p38MAPK)and glycogen synthase kinase-3b(GSK-3b).The glucose uptake decreased with the increase in Retn gene expression in 3T3-L1 cells,which was independent of whether the cells were stimulated by insulin or not.The mRNA expression of two signal proteins PI-3K and AKT-2 decreased and the other two signal proteins,GSK-3b and p38MAPK,increased with Retn overexpression in 3T3-L1 cells.Resistin could induce insulin resistance in adipocytes,which might be related to the changes of some proteins in PI-3K and Ras pathways.
