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人胚胎干细胞来源的肝细胞:一种具有潜力的乙肝病毒研究模型

孙平楠1,2,4,周小玲2,3,4,*,杨少哲1,2,4,程  琳2,3,4,姚伟城2,3,4   

  1. 汕头大学医学院分子病理实验室,广东  汕头515041
  • 收稿日期:2014-07-14 修回日期:2014-09-01 出版日期:2014-09-30 发布日期:2014-09-30
  • 通讯作者: 周小玲,E-mail:xiaolingsmiling_zhou@yahoo.com
  • 作者简介:孙平楠(1977- ),男,湖南省怀化市人,副教授,研究方向:应用人胚胎干细胞来源的肝脏细胞建立HBV研究新模型。
  • 基金资助:

    国家自然科学基金 (81261130312);广东省自然科学基金(S20120 10009414,S2012010009605);汕头大学医学院李嘉诚基金

Human embryonic stem cell-derived hepatocytes: a potential model for hepatitis B virus

SUN Ping-nan1,2,4,ZHOU Xiao-ling2,3,4,*,YANG Shao-zhe1,2,4,CHENG Lin2,3,4,YAO Wei-cheng2,3,4   

  1. Molecular Pathology Laboratory, Shantou University Medical College, Shantou 515041
  • Received:2014-07-14 Revised:2014-09-01 Online:2014-09-30 Published:2014-09-30

摘要:

目的: 初步探索应用人胚胎干细胞来源的肝细胞作为乙肝病毒(HBV)体外研究模型的潜力。方法:定向分化人胚胎干细胞为肝细胞(hESC-Heps);采用免疫荧光方法检测肝性因子如肝细胞核因子-4α(HNF4α)、白蛋白(ALB)和HBV功能性受体钠离子/牛磺胆酸共转运蛋白(NTCP)受体的表达;实时荧光定量PCR检测Ⅲ型干扰素受体表达,Western blotting 检测hESC-Heps在Ⅲ型干扰素刺激下干扰素通路中磷酸化转录信号传导子与激活子2 (STAT2)的表达。结果:成熟的hESC-Heps表达肝性因子HNF4α和ALB,表达HBV功能性受体NTCP受体,并且具有人原代肝细胞特异性的Ⅲ型干扰素反应。结论:人胚胎干细胞来源的肝细胞hESC-Heps可能成为一种具有潜力的HBV研究模型。

关键词: 人胚胎干细胞, 肝细胞, HBV研究模型

Abstract:

OBJECTIVE: To explore the potential of human embryonic stem cell-derived hepatocytes (hESC-Heps) for hepatitis B virus (HBV) model. METHODS:Human embryonic stem cells were directly induced to differentiate into hESC-Heps using a step-wised method. Expression of hepatocyte-enriched factors such as hepatocyte nuclear factor 4 alpha (HNF4α) and albumin (ALB),and HBV functional receptor Na+/taurocholate cotransporting polypeptide (NTCP) receptor in hESC-Heps were examined by immunofluorescence method. Moreover,activation of signal transducer and activator of transcription 2 (STAT2) in hESC-Heps treated with type Ⅲ interferon was examined by Western blotting. RESULTS:Mature hESC-Heps expressed HNF4α,ALB,and NTCP receptor as well as displayed type Ⅲ interferon response specific in primary human hepatocytes. CONCLUSION:hESC-Heps may be a potential model for HBV research.

Key words: human embryonic stem cell, hepatocytes, HBV model