控制性超促排卵对小鼠卵母细胞线粒体数目和功能的影响  被引量:3

Effects of controlled ovarian hyperstimulation on mitochondria copy number and functions in murine oocytes

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作  者:葛红山[1] 张帆[1] 李晓和[1] 陈华[1] 习海涛[1] 黄检英[1] 朱春芳[1] 吕杰强[1] 

机构地区:[1]温州医科大学附属第二医院生殖医学中心,325000

出  处:《中华妇产科杂志》2013年第11期858-861,共4页Chinese Journal of Obstetrics and Gynecology

基  金:国家自然科学基金(30900516,81370674);浙江省自然科学基金(Y2081011,LY13H040012)

摘  要:目的 探讨控制性超促排卵(COH)对小鼠卵母细胞胞质内线粒体数目、分布、氧化磷酸化(OXPHOS)活性以及活性氧生成的影响,进而分析COH来源的卯母细胞高损失率的可能机制.方法 将实验小鼠随机分为COH组(20只)和对照组(40只),采用实时定量PCR技术、免疫荧光和荧光素-荧光素酶反应发光法分别检测两组小鼠卵母细胞线粒体DNA (mtDNA)拷贝数、线粒体膜电位(△Ψm)强度、三磷酸腺苷(ATP)含量、线粒体分布和胞质内活性氧水平.结果 卵母细胞mtDNA平均拷贝数对照组为(2.16±0.19)× 105,COH组(1.15±0.10) ×105,两组比较,差异有统计学意义(P<0.05);COH组卵母细胞的平均△Ψm强度和ATP平均含量分别为0.34±0.03和(241±20)fmol/枚,对照组分别为0.82±0.07和(325±11) fmol/枚,两组分别比较,差异均有统计学意义(P<0.05).两组间线粒体呈均匀分布的卵母细胞比率[COH组76.5%(78/102)、对照组82.1%(69/84)]比较,差异均无统计学意义(P>0.05).卵母细胞胞质内活性氧水平COH组为1.07±0.07,对照组为0.93±0.08,两组比较,差异也无统计学意义(P>0.05).结论 非生理性的COH过程抑制了卵母细胞线粒体DNA复制和OXPHOS活性,继而可能影响卵母细胞细胞质的成熟进程,这可能是COH周期卵母细胞高损失率的发生机制.Objective To investigate the effect of whether controlled ovarian hyperstimulation (COH) on mitochondrial DNA (mtDNA) copy number,mitochondrial function,distribution,the level of reactive oxygen species(ROS) in oocytes and the mechanism of oocyte loss in COH.Methods Matured murine oocytes were classified into COH group and natural cycles (NC) group.The copies of mtDNA,the magnitude of mitochondrial membrane potential (△Ψm) and oocyte adenosine triphosphate (ATP) content,pattern of mitochondrial distribution,and ROS levels were evaluated by realtime PCR,immunofluorescence and fluorescence-luciferase mensuration.Results The copies of mtDNA,the levels of △Ψm,and ATP content in oocytes between COH and NC groups showed statistical difference [(1.15 ±0.01) × 105,0.34 ±0.03 and (241 ±20) fmol/oocyte (COH)] versus [(2.15 ±0.19) × 105,0.82 ±0.07 and (325 ±11) fmol/oocyte (NC)],respectively(P < 0.05).However,there were no significant differences in the rate of evenly distributed mitochondria and the level of ROS in oocytes from COH and NC [(76.5% (78/102) in COH versus 82.1% (69/84)]; 1.07 ±0.07 in COH versus 0.93 ±0.08 in NC (P>0.05).Conclusion It was indicated that non-physiological COH treatments inhibit mtDNA replication,alter mitochondrial function,which might partly be involved in the low development potential of COH oocyte.

关 键 词:排卵诱导 卵母细胞 线粒体 氧化磷酸化 活性氧 

分 类 号:R321[医药卫生—人体解剖和组织胚胎学]

 

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