肝细胞核因子6在小鼠肝内胆管发育过程中的表达

目的 探讨肝细胞核因子6(HNF6)在肝内胆管发育过程中的作用. 方法 用RT-PCR及免疫组织化学等方法 检测HNF6在小鼠胚胎发育的各个阶段以及成年肝中的表达. 结果 RT-PCR结果 显示,HNF6 mRNA的表达在E9d开始出现,与肝芽形成的时间吻合,E13d HNF6 mRNA的表达消失,E15d又重新出现,并一直维持到出生.免疫组织化学显示,CK19免疫反应在E13d开始出现,此时免疫反应阳性细胞在肝索内散在分布.E15d时在近肝门处的门管区丌始出现由单层的、CK19阳性细胞组成的胆管板,之后,阳性细胞反应主要分布于胆管板和小叶间胆管.E9～11d,多数肝索细胞呈HNF6阳性反应,E13d的肝索中未观察剑HNF6的表达.E15～17d,HNF6阳性反应的分布与CK19相似,成年小鼠肝的胆管上皮细胞仍呈HNF6阳性反应. 结论 HNF6可能与肝干细胞的特化关系不大,而与肝发育的启动、肝干细胞向胆管上皮细胞的分化及其分化状态的维持有关.

EXPRESSION OF HEPATOCYTE NUCLEAR FACTOR 6 DURING THE PROCESS OF INTRAHEPATIC BILIARY DEVELOPMENT

Objective To investigate the function of hepatocyte nuclear factor 6(HNF 6) during the development of intrahepatic biliary.Methods The expression of HNF6 at different stages of intrahepatic bile ducts embryonic development and in the adult mouse liver were detected by RT-PCR and immunohistochemical staining.Results RT-PCR results showed that the expression of HNF6 was detected in the liver at E9d,the time of liver formation onset.Then,HNF6 disappeared transiently at E13d,but it appeared again at E15d.Its ex...