nm23-H1基因和增殖细胞核抗原在肝癌组织中的表达及其与癌细胞DNA含量的关系

目的　探讨转移抑制基因nm23-H1在肝癌组织中的表达和癌细胞增殖及DNA含量间的关系。方法　应用免疫组织化学染色法检测56例肝癌组织标本中nm23-H1基因和增殖细胞核抗原(PCNA)的表达，应用图像分析系统测定癌细胞DNA含量，分析与肝癌病理生物学行为之间的关系。结果　nm23-H1表达阳性率无包膜组肝癌(29.6%)比包膜完整(64.3%)和包膜突破组肝癌(66.7%)明显减低(P＜0.05)。DNA指数(DI)与肝癌包膜情况、组织类型、组织分级也有显著相关性(P＜0.05)。nm23-H1表达阴性的肝癌PCNA标记指数（LI）高于nm23-H1阳性者（P＜0.05)；PCNA标记指数高增殖组肝癌DI值（2.30±0.90）较低增殖组肝癌DI值（1.86±0.7）明显增高（P＜0.05）。结论　nm23-H1表达与肝癌包膜形成具有一定关系，并与肝癌增殖活性相关。DNA含量测定结合PCNA免疫组织化学染色可较为准确的反映肝癌浸润侵袭特征和增殖活性。

Relationship between nm23-H1, proliferating cell nuclear antigen expression and DNA content of human hepatocellular carcinoma

Objective　To evaluate the relationship be tween expressions of nm23-H1, proliferating cell nuclear antigen (PCNA) in hepa tocellular carcinoma and DNA content of cancer cells. Methods　The expression of nm23-H1 and PCNA were detected in 56 cases of HCC by us ing immunohistochemistry technique and DNA content of cancer cells were analyzed by DNA imaging analyses system as well in order to find their relationship with biopathologic characters of HCC. Results　The expression levels of nm23-H1 in HCC without encapsulation (29.6%) were significantly reduc ed when compared with that with encapsulation (64.3%) or with incomplete capsula tion (66.7%,P＜0.05). The increased DNA content of HCC was correlated with n on-encapsulation, compact type and high grade of the tumor (P＜0.05). The labeling indexes of PCNA in the group with negative nm23-H1 expression of HCC w ere significantly higher than those in the group with positive nm23-H1 expressi on of HCC (P＜0.05). The DI in high proliferating group of HCC(2.30±0.90) were significantly higher than in low proliferating group (1.86±0.70，P＜0 .05). Conclusio n　The expression of nm23-H1 in HCC was correlated with formation of tumor capsulation and cancer cell proliferating activity. The analysis of DNA c ontent of tumor cells in combination with the immuohistochemistry staining of PC NA could give accurate index for the malignant biopathologic characters of HCC.