Acute liver failure(ALF)is a multi-systemic disorder with severe impairment of liver function,and complicated with encephaledema,hepatic encephalopathy,and multiple organ dysfunction in a short time.Its true incidence in the pediatric population is unknown,but ALF accounts for 10 to 15% of all pediatric liver transplantations.The multi-center clinical studies for ALF in children are rare.So the management of ALF in children has relied on extrapolation from adult data.But the clinical features of ALF in children are distinguished with the adult's.This paper reviews the current knowledge of the definition,causes,clinical manifestation,diagnosis and treatment for ALF in children.
目的:研究乙型肝炎病毒x基因(hepatitis B virus x gene,HBx)蛋白调节细胞内钙离子可能分子机制,揭示乙型肝炎病毒(hepatitis B virus,HBV)诱导肝癌的可能途径.方法:培养HEK293细胞,取第2代HEK293细胞转染pcDNA-HBx质粒,培养12、24和48 h后,细胞活力细胞毒性检测(cell counting kit-8,CCK-8)观察转染后细胞生长情况,Western b l o t检测H B x蛋白的表达情况,当共同转染HBx基因、Orai1基因或STIM1基因后co-IP实验、免疫荧光检测观察细胞内蛋白结合情况.结果:转染pcDNA-HBx质粒后HBx蛋白可以在HEK293细胞高表达,转染后的24 h后细胞增殖加快(P<0.05),co-IP实验及免疫荧光检测结果均显示,HBx蛋白在细胞内可以与Orai1蛋白结合.结论:HBx蛋白通过与细胞膜钙离子通道Orai1结合,来升高细胞内钙离子浓度,从而影响细胞增殖等活性.
