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| 1 | Detection of RASSF1A promoter hypermethylation in serum from gastric and colorectal adenocarcinoma patients显示文摘AIM:To evaluate the diagnostic role of serum RASSF1A promoter hypermethylation in gastric and colorectal ad- enocarcinoma. METHODS:Methylation-specific polymerase chain reac- tion (MSPCR) was used to examine the promoter meth- ylation status of the serum RASSF1A gene in 47 gastric adenocarcinoma patients, 45 colorectal adenocarcinoma patients, 60 patients with benign gastrointestinal dis- ease (30 with benign gastric disease and 30 with benign colorectal disease), and 30 healthy donor controls. Apaired study of RASSF1A promoter methylation status in primary tumor, adjacent normal tissue, and postopera- tive serum were conducted in 25 gastric and colorectal adenocarcinoma patients who later were underwent sur- gical therapy. RESULTS:The frequencies of detection of serum RASSF1A promoter hypermethylation in gastric (34.0%) and colorectal (28.9%) adenocarcinoma patients were significantly higher than those in patients with benign gastric (3.3%) or colorectal (6.7%) disease or in healthy donors (0%) (P < 0.01). The methylation status of RASSF1A promoter in serum samples was consistent with that in paired primary tumors, and the MSPCR results for RASSF1A promoter methylation status in paired preoperative samples were consistent with those in postoperative serum samples. The serum RASSF1A promoter hypermethylation did not correlate with patient sex, age, tumor differentiation grade, surgical therapy, or serum carcinoembryonic antigen level. Although the serum RASSF1A promoter hypermethylation frequency tended to be higher in patients with distant metastases, there was no correlation between methylation status and metastasis. CONCLUSION:Aberrant CpG island methylation within the promoter region of RASSF1A is a promising biomark- er for gastric and colorectal cancer. | Yu-Cai Wang Zheng-HongYu Chang Liu Li-Zhi Xu Wen Yu Jia Lu Ren-Min Zhu Guo-Li Li Xin-Yi Xia Xiao-Wei Wei Hong-Zan Ji Heng Lu Yong Gao Wei-Min Gao Long-Bang Chen | 2008 | World Journal of Gastroenterology2008，14，19： | 26 |
| 2 | 鼻咽癌组织RASSF1A基因的表达显示文摘目的探讨RASSF1A基因在鼻咽癌发病过程中的作用。方法采用逆转录-聚合酶链技术在4种鼻咽癌细胞株、32例鼻咽癌组织和16例正常鼻咽部组织中检测RASSF1A基因的表达,并分析鼻咽癌组织在3p21.3 D3S4604微卫星多态性位点的等位基因杂合性丢失状况。结果RASSF1A基因在4种鼻咽癌细胞株中低表达,32例鼻咽癌组织的RASSF1A基因表达显著低于16例正常鼻咽部组织(P=0.001);43.75%(14/32)的鼻咽癌组织在3p21.3 D3S4604位点发生了杂合性丢失。鼻咽癌RASSF1A基因表达与性别、年龄、颈部淋巴结转移、TNM临床分期、D3S4604位点杂合性丢失和血清EB病毒VCA/IgA抗体滴度无显著相关性,但伴远处转移的鼻咽癌组织的RASSF1A表达显著低于无远处转移的鼻咽癌(P=0.014)。结论RASSF1A基因的表达下调可能是鼻咽癌发病过程中的晚期事件,3p21区域可能还存在与鼻咽癌发生密切相关的抑瘤基因。 | 彭宏 赵彤 姚开泰 | 2003 | 第一军医大学学报2003，23，7： | 6 |
| 3 | 稳定表达RASSF1A基因肝癌细胞株的建立显示文摘目的建立稳定表达RASSF1A基因的肝癌细胞株。方法真核表达载体pcDNA3.1(+)RASSF1A经阳离子脂质体介导转染肝癌细胞株QGY-7703和Hep3B,通过G418筛选阳性细胞克隆,逆转录-聚合酶链反应(RT-PCR)和Western blot鉴定目的基因的表达。结果 (1)QGY-7703,Hep3B细胞株的G418最佳筛选浓度分别为800 μg/ml和400 μg/ml;(2)QGY-7703和Hep3B细胞株各获得2个稳定表达RASSF1A基因的细胞克隆。结论成功建立了稳定表达RASSF1A基因的肝癌细胞株。 | 薛万江 钱海鑫 周晓俊 管洪庚 秦磊 王月珍 | 2005 | 江苏医药2005，31，1： | 1 |
| 4 | 抑癌基因RASSF1A及其甲基化的研究进展显示文摘RASSF1A基因位于染色体3p21.3区,是一种新型抑癌基因,多项研究表明它可参与细胞凋亡和多种恶性肿瘤的发生。在多种肿瘤中失活,该基因的失活与其启动子区CpG岛甲基化有关。通过逆转RASSF1A基因甲基化状态使其重新表达,为肿瘤的治疗提供了新思路。 | 周颉 黄耀 | 2007 | 临床和实验医学杂志2007，6，3： | 1 |
| 5 | Ras相关结构域家族蛋白1A基因的肿瘤抑制效应机制初探显示文摘目的:探讨RASSF1A肿瘤抑制效应的可能机制及其与细胞凋亡和MOAP-1蛋白表达的关系。方法:利用细胞培养及转染技术,将RASSF1A和/或MOAP-1质粒转染到H1299细胞中,用TRAIL诱导瞬时转染细胞H1299或稳定转染细胞HCT116,以及Hela细胞,用免疫共沉淀、Western Blot和激光共聚焦等方法检测RASSF1A与MOAP-1的相关性。结果:RASSF1A与MOAP-1共表达时,可发生蛋白-蛋白交互作用;RASSF1A可改变MOAP-1的表达模式,使其从线粒体进入微管,呈现与RASSF1A相似的表达形态;当RASSF1A高表达时,MOAP-1的蛋白表达亦相应增高,进而促进细胞凋亡的发生。结论:RASSF1A可通过与MOAP-1的蛋白交互作用,促进MOAP-1的表达,激活Bax介导的凋亡通路的信号传导,发挥其抑癌效应。 | 卞倩 | 2008 | 江苏预防医学2008，19，4： | 0 |
| 6 | 人类遗传因素、HPV与宫颈癌显示文摘高危人乳头瘤病毒(HPV)的感染是导致宫颈癌的必要但非充分条件,还有其他因素影响宫颈癌的发生。宿主本身的遗传因素在宫颈癌的发生、发展过程中也起着关键作用。本文对人类遗传因素与HPV的相互作用与宫颈癌的相关研究进展加以综述。 | 韩延霞 | 2007 | 辽宁医药2007，22，1： | 0 |
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