To describe pregnancies and live births that resulted from IVF of mature oocyt es retrieved from dominant follicles in a natural cycle combined with in vitro m aturation (IVM) of immature oocytes retrieved from small ...To describe pregnancies and live births that resulted from IVF of mature oocyt es retrieved from dominant follicles in a natural cycle combined with in vitro m aturation (IVM) of immature oocytes retrieved from small follicles. Case reports . McGill Reproductive Center, Royal Victoria Hospital, McGill University. Three women with normal ovaries or polycystic ovaries who underwent infertility treatm ent. Administration of SC hCG (10,000 IU) 36 hours before oocyte retrieval in a nat ural cycle. After aspiration of all follicles, mature oocytes were inseminated i mmediately; immature oocytes were matured in vitro, inseminated by intracytoplas mic sperm injection (ICSI), and then the embryos transferred. Pregnancy and live birth. Three pregnancies (two live births and one ongoing at time of writing) w ere achieved after the combination of natural-cycle IVF with IVM after transfer of the resulting embryos. Naturalcycle IVF combined with IVM might be a new app roach to IVF treatment for women with various causes of infertility.展开更多
本实验旨在探究Mic60在小鼠卵母细胞体外成熟中的作用。选取4~6周龄的雌性C57BL/6J小鼠,注射孕马血清促性腺激素(PMSG)48 h后采集卵母细胞并随机分为对照组和Mic60抑制组(包括50、100、130、150μmol/L组,Miclxin组为130μmol/L)。卵母...本实验旨在探究Mic60在小鼠卵母细胞体外成熟中的作用。选取4~6周龄的雌性C57BL/6J小鼠,注射孕马血清促性腺激素(PMSG)48 h后采集卵母细胞并随机分为对照组和Mic60抑制组(包括50、100、130、150μmol/L组,Miclxin组为130μmol/L)。卵母细胞体外培养16 h后,通过免疫荧光染色检测纺锤体形态、ROS水平、线粒体分布和质量,利用qPCR检测抗氧化基因表达、线粒体呼吸链亚基的表达、整合应激反应相关基因的表达。结果表明:与对照组相比,130μmol/L Mic60抑制剂会降低卵母细胞体外成熟率(78.29%vs.21.08%,P<0.01),并显著阻碍纺锤体的组装;与对照组相比,Miclxin组卵母细胞中的ROS水平升高(P<0.05),且Sod1(0.83 vs. 0.22)和Sod2(0.84 vs. 0.27)基因表达降低(P<0.05),线粒体分布异常比例升高(0.16 vs. 0.57,P<0.05),线粒体膜电位水平降低(1.61 vs. 1.05,P<0.05),ATP产生降低(1.16 vs. 0.79,P<0.05);Miclxin组卵母细胞线粒体呼吸链复合体亚基Ndufv2和Sdha表达降低(P<0.05),Cyc1表达升高(P<0.05),卵母细胞mtDNA拷贝数降低(19 324 vs. 9 066,P<0.05);与对照组相比,Miclxin组卵母细胞Oma1、Dele1、Eif2ak1、eIF2α基因表达上调(P<0.05),触发了整合应激反应(Integrated Stress Response,ISR)并上调了ISR主要效应因子Atf4、Atf5和Chop的表达(P<0.05)。可见,抑制Mic60会通过损害线粒体功能并触发ISR影响卵母细胞体外成熟效果。展开更多
文摘To describe pregnancies and live births that resulted from IVF of mature oocyt es retrieved from dominant follicles in a natural cycle combined with in vitro m aturation (IVM) of immature oocytes retrieved from small follicles. Case reports . McGill Reproductive Center, Royal Victoria Hospital, McGill University. Three women with normal ovaries or polycystic ovaries who underwent infertility treatm ent. Administration of SC hCG (10,000 IU) 36 hours before oocyte retrieval in a nat ural cycle. After aspiration of all follicles, mature oocytes were inseminated i mmediately; immature oocytes were matured in vitro, inseminated by intracytoplas mic sperm injection (ICSI), and then the embryos transferred. Pregnancy and live birth. Three pregnancies (two live births and one ongoing at time of writing) w ere achieved after the combination of natural-cycle IVF with IVM after transfer of the resulting embryos. Naturalcycle IVF combined with IVM might be a new app roach to IVF treatment for women with various causes of infertility.
文摘本实验旨在探究Mic60在小鼠卵母细胞体外成熟中的作用。选取4~6周龄的雌性C57BL/6J小鼠,注射孕马血清促性腺激素(PMSG)48 h后采集卵母细胞并随机分为对照组和Mic60抑制组(包括50、100、130、150μmol/L组,Miclxin组为130μmol/L)。卵母细胞体外培养16 h后,通过免疫荧光染色检测纺锤体形态、ROS水平、线粒体分布和质量,利用qPCR检测抗氧化基因表达、线粒体呼吸链亚基的表达、整合应激反应相关基因的表达。结果表明:与对照组相比,130μmol/L Mic60抑制剂会降低卵母细胞体外成熟率(78.29%vs.21.08%,P<0.01),并显著阻碍纺锤体的组装;与对照组相比,Miclxin组卵母细胞中的ROS水平升高(P<0.05),且Sod1(0.83 vs. 0.22)和Sod2(0.84 vs. 0.27)基因表达降低(P<0.05),线粒体分布异常比例升高(0.16 vs. 0.57,P<0.05),线粒体膜电位水平降低(1.61 vs. 1.05,P<0.05),ATP产生降低(1.16 vs. 0.79,P<0.05);Miclxin组卵母细胞线粒体呼吸链复合体亚基Ndufv2和Sdha表达降低(P<0.05),Cyc1表达升高(P<0.05),卵母细胞mtDNA拷贝数降低(19 324 vs. 9 066,P<0.05);与对照组相比,Miclxin组卵母细胞Oma1、Dele1、Eif2ak1、eIF2α基因表达上调(P<0.05),触发了整合应激反应(Integrated Stress Response,ISR)并上调了ISR主要效应因子Atf4、Atf5和Chop的表达(P<0.05)。可见,抑制Mic60会通过损害线粒体功能并触发ISR影响卵母细胞体外成熟效果。