中国癌症杂志 ›› 2014, Vol. 24 ›› Issue (8): 568-574.doi: 10.3969/j.issn.1007-3969.2014.08.002

• 论著 • 上一篇    下一篇

RASSF10基因在贲门腺癌组织中的甲基化状态及表达

崔建利,郭炜,郭艳丽,沈素朋,董稚明   

  1. 河北医科大学第四医院河北省肿瘤研究所病理研究室,河北 石家庄 050011
  • 出版日期:2014-08-30 发布日期:2014-11-07
  • 通信作者: 董稚明 E-mail:dongzhiming2000@aliyun.com
  • 基金资助:
    国家自然科学基金(No:81101854);河北省医学研究重大专项基金(No:冀财预复[2012]2056号)

Methylation status and expression of RASSF10 gene in gastric cardia adenocarcinoma

CUI Jian-li, GUO Wei, GUO Yan-li, SHEN Su-peng, DONG Zhi-ming   

  1. Cancer Institute, Fourth Hospital of Hebei Medical University, Shijiazhuang Hebei 050011, China
  • Published:2014-08-30 Online:2014-11-07
  • Contact: DONG Zhi-ming E-mail: dongzhiming2000@aliyun.com

摘要:

背景与目的:Ras相关域家族10基因(Ras-association domain family 10RASSF10)在多种肿瘤组织中具有肿瘤抑制功能,然而在贲门腺癌组织中的研究尚未见报道。检测贲门腺癌(gastric cardia adenocarcinomaGCA)组织中RASSF10基因的甲基化状态及表达情况,进一步探讨RASSF10基因在GCA发生、发展中的作用。方法:分别应用甲基化特异性聚合酶链式反应(methylation specific polymerase chain reactionMSP)、逆转录-聚合酶链式反应(reverse transcription-polymerase chain reactionRT-PCR)及免疫组织化学方法检测81GCA患者癌组织及癌旁正常组织中RASSF10基因的甲基化状态及mRNA和蛋白表达情况。结果:RASSF10基因在GCA组织中的启动子区甲基化率(64.2%52/81)显著高于癌旁正常组织(21.0%17/81P<0.05),并与肿瘤组织的TNM分期、分化程度及淋巴结转移相关(P<0.05)RASSF10基因在GCA组织中的mRNA表达量(0.57±0.05)显著低于癌旁正常组织(0.78±0.02P<0.05),并与肿瘤组织的TNM分期及淋巴结转移相关(P<0.05)RASSF10蛋白在GCA组织中的阳性表达率(31.1%26/81)明显低于癌旁正常组织(71.6%58/81P<0.05),并与肿瘤组织的TNM分期、分化程度及淋巴结转移相关(P<0.05)RASSF10基因在GCA组织中的甲基化率与其蛋白表达呈明显的负相关。结论:RASSF10基因启动子区的异常高甲基化导致的基因沉默可能是GCA发生的机制之一。

关键词: 贲门腺癌, 甲基化, RASSF10基因

Abstract:

Background and purpose: RASSF10 acts as a kind of tumor suppressor in various tumor tissues, but researches in cardiac adenocarcinoma has not been reported. This study aimed to detect the methylation status and expression of Ras-association domain family 10 (RASSF10) in gastric cardia adenocarcinoma (GCA), and explore its role in occurrence and development of GCA. Methods: Methylation specific polymerase chain reaction (MSP), reverse transcription-polymerase chain reaction (RT-PCR) and immunohistochemistry method were respectively used to detect methylation status, mRNA expression and protein expression of RASSF10 in 81 GCA tissues and corresponding normal tissues.Results: The promoter methylation frequency of RASSF10 in GCA tissues (64.20%, 52/81) was significantly higher than that in corresponding normal tissues (20.99%, 17/81, P<0.05), and was closely correlated with TNM stages, differential degree and lymph node metastasis (P<0.05). RASSF10 mRNA expression in GCA tissues (0.57±0.05) was significantly lower than that in corresponding normal tissues (0.78±0.02, P<0.05), and was closely correlated with TNM stages and lymph node metastasis (P<0.05). Protein expression of RASSF10 in GCA tissues (31.10%, 26/81) was significantly lower than that in corresponding normal tissues (71.60%, 58/81, P<0.05), and was closely correlated with TNM stages, differential degree and lymph node metastasis (P<0.05). The promoter methylation frequency of RASSF10 in GCA tissues was inversely related to its protein expression.Conclusion: Inactivation of RASSF10 caused by aberrant methylation in the promoter region may be closely correlated with the GCA tumorgenesis.

Key words: Gastric cardia adenocarcinoma, Methylation, RASSF10 gene