【摘要】 背景与目的:细胞周期蛋白(Cyclins)在许多肿瘤中过度表达,但其在肝细胞癌(hepatocellular carcinoma,HCC)的表达情况及与细胞增殖和凋亡的关系研究甚少,本研究旨在通过检测原发性HCC中细胞周期蛋白、增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)表达和细胞凋亡的情形,探讨它们之间的相互关系。方法:应用组织芯片技术,采用SP免疫组织化学方法检测122例HCC组织中CyclinsA、B1、D1、E和PCNA表达,应用原位脱氧核糖核酸末端转移酶(in situterminal deoxyribonucleotide transferase,ISTdT)标记技术检测细胞凋亡的情况。结果:122例HCC组织中,CyclinA的阳性率为50.0%,CyclinB1为47.5%,CyclinD1为42.6%,CyclinE为35.2%;组织学分级为Ⅱ级、Ⅲ级、Ⅳ级的HCC组织Cyclins表达高于Ⅰ级(P﹤0.05);HCC组织中组织学分级为Ⅱ级、Ⅲ级、Ⅳ级的凋亡细胞密度均低于Ⅰ级(P﹤0.05),分化愈差,凋亡细胞密度愈低;HCC组织中组织学分级为Ⅱ级、Ⅲ级、Ⅳ级的PCNA评分高于Ⅰ级(P﹤0.01),分化愈差,PCNA评分愈高;HCC组织中Cyclins蛋白表达与凋亡细胞密度呈负相关(r=-0.686,P<0.01),与PCNA评分呈正相关(r=0.599,P<0.01),HCC组织中凋亡细胞密度与PCNA评分呈负相关(r=-0.701,P<0.01)。结论:Cyclins在肝细胞癌组织中呈不同程度更多还原

【Abstract】 BACKGROUND & OBJECTIVE: Cyclins overexpress in various tumors, but its expression in hepatocellular carcinoma (HCC) and its correlation to cell proliferation and apoptosis are unclear. This study was to determine the expression of Cyclins, proliferating cell nuclear antigen (PCNA), and cell apoptosis in HCC, and to analyze their interrelations. METHODS: Tissue microarray technology and SP immunohistochemistry were used to detect expressions of Cyclins A, B1, D1, E, and PCNA in 122 specimens of HCC. In situ terminal deoxyribonucleotide transferase labeling was used to detect cell apoptosis. RESULTS: In the 122 HCC specimens, positive rate of Cyclin A was 50.0%, of Cyclin B1 was 47.5%, of Cyclin D1 was 42.6%, of Cyclin E was 35.2%. Cyclins levels were significantly higher in HCC tissues of grade Ⅱ,Ⅲ, and Ⅳ than in HCC tissues of grade Ⅰ(P ﹤ 0.05). Densities of apoptotic cells were significantly lower in HCC tissues of grade Ⅱ, Ⅲ, and Ⅳ than in HCC tissues of grade Ⅰ(P ﹤ 0.05); PCNA scores were significantly higher in HCC tissues of grade Ⅱ,Ⅲ, and Ⅳ than in HCC tissues of grade Ⅰ(P ﹤ 0.01). The poorer differentiation, the lower density of apoptotic cells in HCC, the higher PCNA score in HCC. Cyclins levels were negatively related to density of apoptotic cells (r=-0.686, P < 0.01), and positively related to PCNA score (r=0.599, P < 0.01); density of apoptotic cells was negatively related to PCNA score (r=-0.701, P < 0.01). CONCLUSION: Cyclins overexpress in HCC, which may shorten tumor cell cycle phase, accelerate cell proliferation and decrease apoptosis, and result in increased malignant phenotypes.更多还原