| 分析大肠癌组织中抑癌基因及肿瘤相关基因位点的变化与预后的关系。方法 79例大肠癌组织经组织微解剖分离癌组织和正常组织,分别进行11个染色体上14个位点的杂合性丢失(loss of heterozygosity, LOH)分析。结果 肿瘤组织中LOH呈现一复杂的征象,5q12及RB基因位点的LOH与较好的预后有关。结论 不同的抑癌基因及肿瘤相关基因与大肠癌发生有关。5q12位点的LOH与较好预后相关的意义有待今后进一步研究。
LOH analysis of tumor associated gene loci in sporadic colorectal carcinoma
SUN Menghong*, Johannes Gebert, Magnus von Knebel Doeberitz.
*Institute of Molecular Pathology, Cancer Hospital, Shanghai Medical University, Shanghai 200032
【Abstract】 Objective To analyze the changes in suppressor genes and tumor associated gene loci in sporadic colorectal carcinoma and their relation to the prognosis.Methods Matched tumor and normal DNA from colorectal cancer (CRC) of 79 patients obtained by microdissection and LOH analysis in the 14 loci in 11 chromosomes were performed.Results LOH was seen in 86% of the tumors. Analysis showed that the patients with LOH at 5q12 locus revealed a better prognosis.Conclusion Different tumor suppressor gene and tumor associated gene were related to the CRC development. The underlying molecular mechanism of a better prognosis in the patients with LOH at 5q12 locus has to be evaluated in further studies.
【Key words】 Lntestinal neoplasms Tumor associated genes LOH Interstine, large
我们选取14个多位于基因内的微卫星标志,分析大肠癌组织中这些抑癌基因及肿瘤相关基因位点的变化,现将结果报道如下。
对象和方法
1. 实验对象 大肠癌患者79例来自1986~1988年德国海德堡大学外科医院,其中男44例,女35例。平均年龄为66.6岁。24例肿瘤位于右半结肠,其余55例位于左半结肠。45例为结肠癌,34例为直肠癌。61例组织学分级Ⅰ~Ⅱ级,18例组织学分类Ⅲ~Ⅳ级。79例患者均未经任何术前抗肿瘤治疗。
2. 方法 经微解剖提得配对癌细胞(>80%)和正常组织DNA模板。经PCR扩增的含微卫星序列的产物在ALF自动测序仪中行聚丙烯凝胶电泳。电泳结果用片段分析软件(Fragment Manager, Pharmacia)分析LOH结果。
3. 统计学分析 微卫星位点LOH与临床病理资料之间的相关性,着重分析与术后生存率的关系。Kaplan-Meier曲线与χ2分析用于随访资料的分析。
[1] [2] [3] 下一页 2006-4-12 15:36:22文章来自中健网79393疾病频道2006-4-12 15:36:22 作者:孙孟红
|