作者:颜政 周为 方驰华作者单位:(1.青海大学附属医院肿瘤外科;2.南方医科大学珠江医院肝胆外科) ( `9 x: [6 B+ g
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【摘要】 目的 探讨卵圆细胞部分表面标记在肝细胞癌中的表达状况和意义。方法 应用免疫组织化学SABC法检测20例肝细胞癌中CK7、CK19、CK18、CD34、c-kit 抗原的表达。结果 14例肝细胞癌CK7表达呈阳性,其阳性表达率为70%(14/20);9例c-kit 的阳性表达率为45%(9/20);在20例肝细胞癌癌组织中的CK18全部呈阳性表达,CK19和CD34全部呈阴性表达。CK7、c-kit表达与患者年龄、性别无关,与肿瘤大小、是否合并肝硬化以及组织学分级也不相关(P﹥0.05)。结论 肝细胞癌癌组织中存在表达卵圆细胞表面标记的细胞,其表达CK7、c-kit,不表达造血干细胞标记物CD34。其进一步提示,肝细胞癌可能不是起源于肝干细胞而是来源于过渡性的前体细胞/祖细胞,如来源于Hering管的卵圆细胞。 颜政(1963~),男,汉族,湖南籍,副主任医师,博士 1 U7 E8 ]0 L6 v8 J! `9 i8 u
【关键词】卵圆细胞 表面标记 肝细胞癌 肝脏干细胞, l4 ~! \- e$ e b
EXPRESSION AND SIGNIFICANCE OF SURFACE : a) p# n& W5 W+ @. f" ~- ~1 p2 A2 }: {: u) a, U
MARKERS OF OVAL CELLS IN HEPATIC CELLUL # H8 s( R, f$ _# g4 r9 l$ b- I 9 o3 W: Z: U5 X' X# [( m7 o) `/ AAR CARCINOMA : Z, h# o( d C+ {- M% i0 M2 g# O: s) V% \ - `$ I1 W) i$ @8 n# }Yan Zheng1,Zhou Wei1,Fangh Chihua2 # c6 n1 {/ g: z4 _( U6 w8 T& W1 E) {1 d: M* o * h q: Q) L1 V% c(1.Department of Tumor Surgery, Qinghai University Affiliated Hospital; + s+ w$ p8 b/ m# t% q0 A, U/ M& v( Z5 h9 }; I( E
2.Department of General Surgery,Zhujiang Hospital, The Southern Medical University) , [# }9 l5 P" b. Q; z$ l. K, T 1 b' C+ {: ?- y$ uAbstractObjectiveTo identify the expression of surface markers on oval cells and explore its implications in hepatic cellular carcinoma(HCC). MethodsSurface markers of oval cells (CK7, CK18, CK19, CD34 and c-kit)antigen was tested using histochemical method (SABC) in 20 cases with hepatic cellular carcinoma. ResultsExpression of CK18 was positive in all 20 hepatic cancer samples. Expression of CK19 was not observed in all hepatic cancer samples except in the sample of epithelial cell of small bile duct and expression of CD34 was not observed in all hepatic cancer samples. CK7 expression was positive in 14 HCC samples (14/20, 70%) and c-kit expression was positive in 9 samples (9/20, 45%). Expression of CK7 and c-kit were not found in 4 samples of parenchyma cells of normal hepatic tissues. The expression of CK7 and c-kit is not related to the age, gender of patients, neither to compilation of hepatocirrhosis or histological classification (P>0.05). Conclusion In HCC tissues, there are cells that can express surface markers of oval cells. These cells can express CK7 and c-kit, but cannot express CD34, the marker of hematopoietic stem cell. This suggests that HCC may not be originated by hepatic stem cell, but rather by transitional progenitor cell, such as the oval cell originated from Hering duct." D7 z$ }2 P2 k
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Key wordsOval cellSurface markerHepatic cellular carcinomaHepatic stem cell / e2 D5 L+ y# s- u8 x4 D( e W4 S9 W. @
目前,有关肝细胞癌的细胞源研究取得了较大进展,已有实验提示肝内卵圆细胞在致癌因素的作用下可向癌细胞异常分化,已经有不少学者从肝癌组织中发现了卵圆细胞(Oval cell,OVC)的存在[1,2]。但原发性肝癌是否来源于肝卵圆细胞成熟受阻的过程还未有定论,因此没有肝卵圆细胞发展为原发性肝癌的直接证据。肝卵圆细胞是肝干细胞的子代,被认为是由干细胞分化而来,具有双向分化潜能,既可分化为肝细胞,也可分化为胆管上皮细胞,具有一过性地表达肝细胞和胆管细胞的特性。因此,卵圆细胞既部分表达“肝细胞型”CK组型CK8和CK18,还表达“胆管型”CK组型CK7和CK19。许多学者提出上述特性甚至可以在肝细胞性肝癌(Hepatic Cellular Carcinoma,HCC)及胆管细胞性癌(Intrahepatic Cholanglo Carcinoma, ICC)中得到保持。然而,目前对此认识尚未统一。假设肝细胞癌来源于肝脏干细胞,我们拟利用免疫组织化学研究方法检测肝脏干细胞部分表面标记在肝细胞癌癌组织中的表达,探索肝细胞癌卵圆细胞可能的起源。8 I5 M+ W! m. U
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