應(yīng)用微陣列分析技術(shù)對(duì)胃癌基因組的相關(guān)性研究
發(fā)布時(shí)間:2018-05-15 11:48
本文選題:胃癌 + 全基因組微陣列分析; 參考:《吉林大學(xué)》2015年碩士論文
【摘要】:背景:隨著醫(yī)療技術(shù)的發(fā)展和人們的逐漸重視,胃癌的早期診斷率有所增加,治療方法日益完善,但盡管采用手術(shù)、化療和放療等綜合措施治療胃癌,對(duì)晚期胃癌患者的整體效果仍不甚滿(mǎn)意。腫瘤是多基因病,腫瘤的全基因組研究逐漸被人們所重視,明確腫瘤細(xì)胞的基因結(jié)構(gòu),干預(yù)細(xì)胞的基因表達(dá)過(guò)程,是腫瘤治療研究的重要方向。目前,對(duì)于胃癌的全基因組研究較少,基因治療效果局限。微陣列分析可以大規(guī)模的分析基因組數(shù)據(jù),,明確胃癌基因組的異常變化,以達(dá)到個(gè)性化治療的目的。 目的:通過(guò)對(duì)胃癌標(biāo)本進(jìn)行全基因組高分辨率微陣列分析,明確胃癌染色體組基因拷貝數(shù)異常以及雜合子缺失情況,分析其發(fā)生變化區(qū)域所包含的腫瘤相關(guān)基因,為早期診斷提供新標(biāo)志物,同時(shí)為基因治療提供新靶點(diǎn)。 方法:本實(shí)驗(yàn)收集附屬醫(yī)院綜合臨床、影像學(xué)及術(shù)后病理明確診斷為胃癌的組織標(biāo)本,提取其DNA,通過(guò)應(yīng)用CGH+SNP芯片的全基因組高分辨率微陣列分析技術(shù),分析胃癌基因組的染色體拷貝數(shù)異常及雜合子缺失情況,明確其與胃癌的相關(guān)性,為提出新的腫瘤標(biāo)志物以及個(gè)性化基因治療做鋪墊。 結(jié)果:35例胃癌標(biāo)本均有復(fù)雜的拷貝數(shù)丟失和(或)擴(kuò)增以及雜合子缺失情況,其中胃癌DNA1p,3p,4p,5q,6q,8p,9p,10q,11q,14q,15q,16q,17p,18p,19p,21q,22q,WholeY均存在基因拷貝數(shù)丟失,1q,3q,5p,6p,7p,8q,9q,11p,12q,13q,17q,19q,20q,Xq存在基因拷貝數(shù)擴(kuò)增。50%以上的病例發(fā)現(xiàn)8q24.11q24.21,8q24.21q24.22,8q24.3的拷貝數(shù)擴(kuò)增,45%的病例存在3p14.2拷貝數(shù)丟失,多例標(biāo)本發(fā)現(xiàn)20號(hào)染色體整條拷貝數(shù)擴(kuò)增及Y號(hào)染色體整條拷貝數(shù)丟失,是進(jìn)一步研究的新方向。同時(shí)發(fā)現(xiàn)一些腫瘤相關(guān)基因如FHIT、APC、DCC、WWOX等基因拷貝數(shù)丟失,以及CDKs、EGFR、PIK3CA等基因的染色體拷貝數(shù)擴(kuò)增與胃癌相關(guān)性大,并發(fā)現(xiàn)其他腫瘤相關(guān)基因MTAP、NDUFA13等基因拷貝數(shù)的丟失以及SET、RAP2B、SRC等基因拷貝數(shù)的擴(kuò)增與胃癌有相關(guān)性,目前這些基因與胃癌相關(guān)研究較少,可作為進(jìn)一步研究的方向。雖多例胃癌標(biāo)本DNA均存在雜合子缺失,但其中所發(fā)現(xiàn)有意義的基因較少,PAX1有研究表明與乳腺癌相關(guān),可在將來(lái)結(jié)合胃癌的分組進(jìn)一步做相關(guān)研究。 結(jié)論: 1、胃癌DNA1p,3p,4p,5q,6q,8p,9p,10q,11q,14q,15q,16q,17p,18p,19p,21q,22q,WholeY均存在基因拷貝數(shù)丟失,1q,3q,5p,6p,7p,8q,9q,11p,12q,13q,17q,19q,20q,Xq存在基因拷貝數(shù)擴(kuò)增。其中50%以上的病例發(fā)現(xiàn)8q24.11q24.21,8q24.21q24.22,8q24.3的拷貝數(shù)擴(kuò)增,45%的病例存在3p14.2拷貝數(shù)丟失,多例標(biāo)本發(fā)現(xiàn)20號(hào)染色體整條拷貝數(shù)擴(kuò)增及Y號(hào)染色體整條拷貝數(shù)丟失,是進(jìn)一步研究的新方向。 2、發(fā)現(xiàn)FHIT、APC、DCC、WWOX等基因拷貝數(shù)丟失,以及CDKs、EGFR、PIK3CA等基因的染色體拷貝數(shù)擴(kuò)增與胃癌相關(guān)性較高。 3、發(fā)現(xiàn)其他腫瘤相關(guān)基因MTAP、NDUFA13等基因拷貝數(shù)的丟失以及SET、RAP2B、SRC等基因拷貝數(shù)的擴(kuò)增與胃癌有相關(guān)性,是胃癌基因?qū)W研究的新方向。
[Abstract]:Background: with the development of medical technology and people's attention gradually, the early diagnosis rate of gastric cancer has increased and the treatment method has been improved. However, although comprehensive measures such as surgery, chemotherapy and radiotherapy are used to treat gastric cancer, The overall effect on patients with advanced gastric cancer is still not satisfactory. Tumor is a polygenic disease, and the whole genome of tumor has been paid more and more attention. It is an important direction of tumor therapy to clarify the gene structure of tumor cells and interfere with the gene expression process of tumor cells. At present, there is little research on the whole genome of gastric cancer, and the effect of gene therapy is limited. Microarray analysis can analyze genomic data on a large scale and identify abnormal changes of gastric cancer genome in order to achieve individualized treatment. Objective: to identify the aberrant copy number and heterozygote deletion of the chromosomes of gastric cancer samples by high resolution microarray analysis of the whole genome, and to analyze the tumor-related genes contained in the region in which they change. To provide a new marker for early diagnosis and a new target for gene therapy. Methods: the tissue samples from general clinical, imaging and postoperative pathological diagnosis of gastric cancer in affiliated hospitals were collected, and their DNA was extracted. The whole genome microarray technique was used to analyze the DNA of gastric cancer by using CGH SNP chip. The chromosome copy number abnormality and heterozygote deletion in the genome of gastric cancer were analyzed, and the correlation between them and gastric cancer was clarified, which paved the way for the development of new tumor markers and personalized gene therapy. Results all 35 cases of gastric cancer had complicated copy loss and / or amplification and heterozygote deletion. 鍏朵腑鑳冪檶DNA1p,3p,4p,5q,6q,8p,9p,10q,11q,14q,15q,16q,17p,18p,19p,21q,22q,WholeY鍧囧瓨鍦ㄥ熀鍥犳嫹璐濇暟涓㈠け,1q,3q,5p,6p,7p,8q,9q,11p,12q,13q,17q,19q,20q,Xq瀛樺湪鍩哄洜鎷瘋礉鏁版墿澧
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