ABSTRACT
Objective To investigate the changes of calcium /calmodulin - dependent protein kinase Ⅱ (CAMKⅡD) gene expression in 3T3 - L1 preadipocyte diffe-rentiation and TNF - ? regulation of CAMKⅡD gene expression on matured adipocytes. Methods 3T3 - L1 preadipocytes were cultured and differentiated into adipocytes. The levels of CAMKⅡD gene mRNA expression at various times were evaluated by RT-PCR. Matured adipocytes were interfered with 0.1,1.0,10.0 ?g/L TNF - ? and the levels of CAMKⅡD gene mRNA expression were evaluated. Results The levels of CAMKⅡD gene mRNA expression in 3T3 - L1 adipocytes were significantly down- regulated at first day, compared with those at zero day (P0. 05). CAMKⅡD gene mRNA expression decreased significantly at 12 hours after treatment with 10.0 ?g/L TNF-?, treatment of matured adipocytes with TNF - ? did not have any regulation role on it. Conclusions CAMKⅡD gene is involved in the differentiation of adipocytes and related to the etiology of obesity. The changes in the level of CAMKⅡD gene mRNA expression during 3T3 - L1 preadipocyte differentiation may contribute to the differentiation and adipogenesis of adipocytes. It seems that TNF - ? does not have any regulation role on the expression of CAMKⅡD genes.