摘要
目的 多数前列腺癌有两个以上病灶,试图探索这些不同病灶是同源还是各自独立起源.方法 选用19例有两个以上病灶的前列腺癌标本,应用显微切割技术获取肿瘤组织,提取DNA.进行PCR扩增,检测染色体8p(D8S133、D8S136、D8S137)和17q(D17S855)4个位点的等位基因杂合性缺失(LOH).结果 在19例前列腺癌中发现40个病灶,其D8S133,D8S136,D8S137和D17S855 LOH 率分别为74%、38%、86%和46%.18例中有15例(83%)多发灶LOH不相同,显示其病灶各为独立起源.3例组织学结构显著不同的多发癌灶,LOH为单克隆性(同一来源).结论 多数前列腺癌同一肿瘤中不同病灶的起源不同.
Objecfive Most prostate cancer contains two or more widely separate turnors.To study the origin of prostate cancer based on the analysis of microsatellite alteration in separate tumors from the same prostate.Methods A polymerase chain reaction (PCR) was used to examine the allelic loss pattern of 4 microsatellite polymorphic markers on chromosome 8p (D8S133,D8S136,D8S137) and 17q (D17S855) in multifocal tumors of prostate from 19 patients.DNA samples were obtained from different regions of distinctly separate tumors on single case using microdissection technique.Results The overall frequence of LOH at D8S133,D8S136,D8S137 and D17S855 for all informative cases was 74%,38%,86% and 46%respectively in 40 separate tumors of prostate from 19 patients.The pattern of allelic loss was not identical in 15 of 18 (83%) informative cases. It showed that the different regions of prostate cancer were independent origin respectively.Discordant pattern of histology was observe in distantly separate regions.whereas the same allele was consistently lost in samples from different regions of the same tumor in 3 cases. Condusion Current data supports independent origin of multiple tumors in most prostate cancer patients.
出处
《肿瘤研究与临床》
CAS
2008年第3期185-186,189,共3页
Cancer Research and Clinic
