RESUMO
[Summary] To investigate the effect of microRNA126 on glucose metabolism in the normal liver cell lines. In vitro, the chang liver cell lines were cultured. Under the most effective transfection conditions ascertained above, microRNA126 mimic, microRNA126 inhibitor, and relative negative control were transfected into the cultured normal liver cells. And the transfection efficiency was tested by realtime fluorescent quantitative PCR. After 48 hours, the cells were stimulated with synthetic insulin ( 100 nmol/L ) and respective substrates for 2 hours. Then the glycogenesis, gluconeogenesis, and glycolysis in cells were measured. The level of microRNA126 of the microRNA126 mimic group was higher than the other groups, and the difference was statistically significant ( P<0. 05 ). MicroRNA126 mimic group significantly decreased glucose utilization, reduced glycogen synthesis, effectively increased the account of gluconeogenesis, reduced lactate production, and pyruvate kinase activity ( all P<0. 05). The over-expressing microRNA126 in hepatocytes may reverse the function of glucose metabolism, and enhance output of hepatic glucose.