›› 2004, Vol. 24 ›› Issue (1): 7-10.

• 论文 • 上一篇    下一篇

大鼠肝卵圆细胞增殖模型建立及其纯化鉴定

  

  1. 1.上海第二医科大学附属瑞金医院感染病科,上海 200025;2.苏州大学附属第一医院感染病科,苏州 215006
  • 收稿日期:2003-11-11 出版日期:2004-01-25 发布日期:2013-03-19

Establishment of Hepatic Oval Cell Proliferation Model and Purification of Hepatic Oval Cell

  1. 1.Department of Infection Disease,Ruijin Hospital,Shanghai Second Medical University, Shanghai 200025,China 2.First AffiLated Hospital,Suzhou University,SuZhou 215006,China
  • Received:2003-11-11 Online:2004-01-25 Published:2013-03-19

摘要: 为建立大鼠卵圆细胞增殖模型,分离纯化卵圆细胞并对其特性进行研究,SD大鼠喂饲2-乙酰氨基芴(2-acetyailamifluorene,2-AAF),剂量分别为5、10、15、20mg/kg,连续给药6d,于第7天行三分之二部分肝切除,术后继续给药1周,每隔3 d取肝组织行常规组织学观察,作细胞增殖试验及免疫组化染色。通过免疫磁珠标记C-kit阳性细胞以纯化卵圆细胞(Magnetic activated cell sorting,MACS),用免疫细胞化学及RT-PCR对纯化细胞进行鉴定。结果:10、15、20mg/kg三种剂量2-AAF均可成功建立卵圆细胞增殖模型,卵圆细胞增殖于第8天较明显,至第11天达高峰,第14天有所减少。卵圆细胞胞核Brdu染色阳性,其除表达卵圆细胞特异性抗原OV6外,尚表达肝细胞标记白蛋白及胆管细胞标记CK19。胚胎期肝细胞抗原AFP、连接蛋白43在卵圆细胞中亦有高表达,同时还表达造血干细胞标记C-kit。以MACS纯化的C-kit阳性卵圆细胞,90%以上为OV6阳性,并有AFP、白蛋白、CK19mRNA转录。结论:2-AAF剂量为10~20mg/kg时可获得满意的大鼠卵圆细胞增殖模型,增生的卵圆细胞为具有双向分化潜能的肝干细胞/前体细胞,利用C-kit标记通过MACS可纯化这种肝干细胞/前体细胞。

关键词: 卵圆细胞, 肝前体细胞, 干细胞, 免疫组化

Abstract: To establish a rat model for hepatic oval cells proliferation and to analyze the characterization of oval cell,SD rats (about 150 g) were given 2-acetylaminofluorene (2-AAF)6 days before partial hepatectomy and 7 days after it. Liver tissue specimens were obtained every 2?3 days after partial hepatectomy and were investigated by HE staining and immunohistochemical staining for Brdu,OV6,cytokeratin-19,albumin,AFP, connexin-43 and C-kit. Oval cells were enriched by magnetic activated cell sorting (MACS) using C-kit antibody.RT-PCR was per-formed on sorted cells for the albumin,AFP and CK19 messenger RNA expression. Results:Ob-vious oval cell proliferation was seen in the liver in 10 mg/kg,15 mg/kg,20 mg/kg groups and o-val cell Brdu incorporation test is positive. Oval cells expressed the specific marker OV6,hepatic cell marker albumin, biliary cell marker CK19,fetal liver cell marker AFP and connexin-43 as well as hematopoietic stem cell receptor C-kit. More than 90% sorted oval cells were OV6 positive and all expressed the albumin,AFP and CK19 gene. Conclusions:Rat model for hepatic oval cell proliferation can be established with 2-AAF/partial hepatectomy at dosage of 10?20 mg/kg body weight. And such oval cells were hepatic stem/progenitor cells which expressed OV6/ CKl9/albumin/AFP/connexin43/C-kit. Oval cell population can be highly enriched with MACS using C-kit.

Key words: Oval cell, Hepatice progenitor cell, Stem cell, Immunohistochemistry