目的通过研究线粒体DNA^4977缺失在盆腔器官脱垂(pelvic organ prolapse,POP)患者子宫骶韧带中的变化,初步探讨POP可能的发生机制。方法取2016年9月～2017年4月我科因POPⅡ～Ⅳ期切除子宫26例为研究组,同期因良性疾病切除子宫的非POP患...目的通过研究线粒体DNA^4977缺失在盆腔器官脱垂(pelvic organ prolapse,POP)患者子宫骶韧带中的变化,初步探讨POP可能的发生机制。方法取2016年9月～2017年4月我科因POPⅡ～Ⅳ期切除子宫26例为研究组,同期因良性疾病切除子宫的非POP患者21例为对照组,取子宫骶韧带组织,提取其中的线粒体DNA,应用荧光定量PCR方法检测线粒体DNA和DNA^4977缺失的相对含量,应用琼脂糖凝胶电泳方法对PCR产物进行比对分析。结果①研究组子宫骶韧带组织中线粒体DNA^4977缺失明显高于对照组,差异有统计学意义(Z=-2. 086,P=0. 037);而2组总线粒体DNA含量无明显差异(P=0. 447)。②研究组线粒体DNA^4977缺失与年龄、孕次、产次、BMI、初产年龄、绝经年龄均无明显相关性(P>0.05);对照组患者线粒体DNA^4977缺失与年龄有明显相关性,随着年龄的增加,线粒体DNA4977缺失增多(r=0. 465,P=0. 034),而与孕次、产次、BMI、初产年龄、绝经年龄无明显相关性(P>0.05)。结论子宫骶韧带线粒体DNA^4977缺失在POP患者中显著增加,可能是导致POP的原因之一。展开更多
Objective: To study the 4977-bp deletion of mitochondiral DNA in lung cancer, adjacent normal tissue and health lung and its significance in the development of cancer. Methods:Thirty-seven matched lung cancer/adjacent...Objective: To study the 4977-bp deletion of mitochondiral DNA in lung cancer, adjacent normal tissue and health lung and its significance in the development of cancer. Methods:Thirty-seven matched lung cancer/adjacent histologically normal and 20 “true” normal lung tissue samples from patients without lung cancer were analyzed by long PCR technique. Results: Mitochondrial DNA 4977-bp deletion was detected in 54.1% (20/37) of lung cancers, 59.5% (22/37) of adjacent normal and 30.0% (6/30) of “true” normal lung tissues. The correlation of 4977-bp deletion with age and smoking factors was present in our data. Conclusion: Mitochondrial DNA 4977-bp deletion is not specific to lung cancer and unlikely to play an important role in carcinogenesis, and may only reflect the environmental and genetic influences during tumor progression.展开更多
Alterations of mitochondria DNA(mtDNA)4977 bp common deletion(CD)and mtDNA copy number induced by ionizing radiation were observed in human different cell lines and total body irradiation patients.However,only few exp...Alterations of mitochondria DNA(mtDNA)4977 bp common deletion(CD)and mtDNA copy number induced by ionizing radiation were observed in human different cell lines and total body irradiation patients.However,only few experiments have evaluated the levels of the CD and mtDNA copy number in human peripheral blood exposed to ionizing radiation till now.The aim of this study is to analyze the mtDNA alterations in irradiated human peripheral blood from healthy donors as well as to explore their feasibility as biomarkers for constructing new biodosimeter.Peripheral blood samples were collected from six healthy donors,and exposed to 60Co gamma ray with the doses of 0 Gy,1 Gy,2 Gy,3 Gy,4 Gy and 5 Gy.Levels of the CD and mtDNA copy number in irradiated samples after 2h or 24h incubation were detected using TaqMan real-time PCR,and the CD ratio was calculated.The results showed that the mean of the CD ratio and the CD copy number exhibited a dose-dependent increase 2 h in the dose range from 0–5 Gy,and of the mtDNA copy number significantly increased 24 h in irradiated groups compared with 0 Gy group after irradiation.It indicates that the parameters in human peripheral blood may be considered as molecular biomarkers to applying construction of new biodosimeter.展开更多
文摘Objective: To study the 4977-bp deletion of mitochondiral DNA in lung cancer, adjacent normal tissue and health lung and its significance in the development of cancer. Methods:Thirty-seven matched lung cancer/adjacent histologically normal and 20 “true” normal lung tissue samples from patients without lung cancer were analyzed by long PCR technique. Results: Mitochondrial DNA 4977-bp deletion was detected in 54.1% (20/37) of lung cancers, 59.5% (22/37) of adjacent normal and 30.0% (6/30) of “true” normal lung tissues. The correlation of 4977-bp deletion with age and smoking factors was present in our data. Conclusion: Mitochondrial DNA 4977-bp deletion is not specific to lung cancer and unlikely to play an important role in carcinogenesis, and may only reflect the environmental and genetic influences during tumor progression.
基金Supported by grants from the building project for the National Key Clinical Special Department of China(No.2011-17)the Medical Science and Technology Foundation of Henan Province(No.201204123)the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘Alterations of mitochondria DNA(mtDNA)4977 bp common deletion(CD)and mtDNA copy number induced by ionizing radiation were observed in human different cell lines and total body irradiation patients.However,only few experiments have evaluated the levels of the CD and mtDNA copy number in human peripheral blood exposed to ionizing radiation till now.The aim of this study is to analyze the mtDNA alterations in irradiated human peripheral blood from healthy donors as well as to explore their feasibility as biomarkers for constructing new biodosimeter.Peripheral blood samples were collected from six healthy donors,and exposed to 60Co gamma ray with the doses of 0 Gy,1 Gy,2 Gy,3 Gy,4 Gy and 5 Gy.Levels of the CD and mtDNA copy number in irradiated samples after 2h or 24h incubation were detected using TaqMan real-time PCR,and the CD ratio was calculated.The results showed that the mean of the CD ratio and the CD copy number exhibited a dose-dependent increase 2 h in the dose range from 0–5 Gy,and of the mtDNA copy number significantly increased 24 h in irradiated groups compared with 0 Gy group after irradiation.It indicates that the parameters in human peripheral blood may be considered as molecular biomarkers to applying construction of new biodosimeter.
