mRNA氧化损伤检测方法的优化及p53 mRNA氧化损伤分析  

Optimization of method to detect mRNA oxidative damage and quantification of p53 mRNA oxidative damage

作　　者：马春花[1,2] 铁轶[2] 付汉江[2] 刘斌[2] 邢瑞云[2] 朱捷[2] 丁勇[3] 郑晓飞[1,2] 

机构地区：[1]安徽医科大学研究生院,合肥230032 [2]军事医学科学院放射与辐射医学研究所,北京100850 [3]军事医学科学院附属医院核医学科,北京10007

出　　处：《军事医学》2013年第3期180-183,200,共5页Military Medical Sciences

基　　金：航天医学基础与应用国家重点实验室开放基金资助项目(SMFA12K16);北京市自然科学基金资助项目(5112029);国家自然科学基金资助项目(31070702;31170713)

摘　　要：目的建立并优化检测真核细胞mRNA氧化损伤的方法——反转录阻断-双引物扩增法,检测p53 mRNA氧化损伤。方法建立非细胞体系和细胞体系mRNA氧化损伤模型,提取RNA并反转录成cDNA,根据所检测mRNA的5'端和3'端各设计一对引物,以cDNA为模板进行实时定量PCR。结果非细胞体系和细胞体系氧化处理组GAPDH和p53 mRNA的氧化损伤程度均明显高于对照组,且随着过氧化氢浓度增加RNA氧化损伤增强;同时一定限度内降低反转录酶用量能提高检测灵敏度。结论本研究建立并优化的RNA氧化损伤检测方法能检测特定mRNA对氧化的敏感性及损伤程度,为分析相关疾病造成的RNA氧化损伤以及探索其发病机制和治疗方法提供了技术支持。Objective To develop and optimize the blocking reverse transcription and double-primer method to assay eukaryotic cell mRNA oxidative damage a p53 mRNA oxidative damage. Methods An oxidative mRNA damage model involving both cell-free systems and cell systems was established using hydrogen peroxide. The total RNA was extracted and reversely transcribed into eDNA. According to the detection of mRNA 5＇ and 3＇ terminals, two pairs of primers were designed. The real-time quantitative PCR was performed using primers which paired with the 5＇ terminals or 3＇terminals of specific mRNA respectively. Results In both cell-free systems and cell systems of oxidative mRNA damage, the GAPDH and p53 mRNA oxidative damage degree of the group treated by hydrogen peroxide were significantly higher than those in control group, and mRNA oxidative damage was enhanced with the increasing concentration of hydrogen peroxide. At the same time, the detection sensitivity could be improved by reducing the dosage of reverse transcriptase. Conclusion The oxidative mRNA damage detection method developed and optimized in this study can detect specific mRNA oxidative damage, providing technical support for the analysis of pathogenesis of the relatcd diseases.

关 键 词：RNA 氧化损伤 P53 MRNA 

分 类 号：R341[医药卫生—基础医学]