鼻咽癌患者EBV LMP1基因C端区的缺失突变及序列分析

目的：研究LMP1基因C端区缺失突变在我国南方广东、广西鼻咽癌高发区的存在状况和探讨其在鼻咽癌中所起的作用。方法：采用聚合酶链反应技术（PCR）扩增鼻咽癌患者鼻咽组织中LMP1基因的C末端，并对其进行了克隆和序列分析。结果：20份鼻咽癌组织标本中，有17份扩增出特异性条带，阳性率为85％，阳性个体中只有1份未发生缺失。我们选择其中的4份样品进行了克隆和序列分析，结果显示，4份样品均存在30个碱基的缺失和某些位点的单点突变。结论：广东、广西鼻咽癌高发区鼻咽癌组织中LMP1基因C端区存在较高比例的碱基缺失和点突变。

Sequence analysis of the deletion and mutation in carboxy terminal region of the Epsteini-Barr virus latent membrane protein 1 derived from nasopharygeal carcinoma patients

Objective To study the deletion and mutation in carboxy terminal region of LMP1 gene derived from nasopharyngeal carcinoma (NPC) in Guangdong and Guangxi, the high risk areas of nasopharyngeal carcinoma in China. Methods LMP1 gene carboxy terminal region was amplified from nasopharyngeal carcinoma tissues by PCR, and then cloned and sequenced. Results Of the 20 cases, 17 were LMP1 positive. In all positive cases, only 1 case did not show deletion. Four positive cases were chosen for DNA sequencing, The rusult showed that all the four cases had mutation and the 30bp deletion. Conclusion High frequency of deletion and mutation in LMP1 gene of nasopharyngeal carcinoma tissues was found in Guangdong and Guangxi. Whether it related to the high incidence of NPC should be further studied.