Keywords dairy cows;hypoglycemia;ketosis;fatty liver;quantitive RT-PCR;calf hepatocyte and adipocyte culture in vitro;neuroendocrine factors;

• 奶牛;低血糖;酮病;脂肪肝;定量RT-PCR;犊牛肝细胞和脂肪细胞;体外培养;神经内分泌因子;