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山羊GDF9基因在卵丘卵母细胞复合体体外成熟过程中的表达 总被引：1，自引：0，他引：1
本研究采用实时荧光定量PCR技术,从mRNA水平探讨了山羊卵丘卵母细胞复合体体外成熟(IVM)过程中(0、6、12、18、24和27h)GDF9基因的相对表达变化,分析其与卵丘细胞扩散之间的关系。结果表明,GDF9 mRNA在山羊卵丘卵母细胞复合体体外成熟过程中均有表达,且在成熟培养初期表达量较低,其表达峰值出现在IVM12h,与卵丘细胞开始扩散的时间一致,之后又有所下降。由此推测,GDF9基因在山羊卵丘扩散和卵母细胞体外成熟过程中起着重要的作用。 相似文献
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胰岛素对犬卵母细胞体外成熟的影响 总被引：2，自引：2，他引：0
研究不同浓度胰岛素及不同培养时间对犬卵母细胞体外成熟率的影响,为改善犬卵母细胞体外培养体系提供参考,采用切割法收集卵巢表面卵丘—卵母细胞复合体(cumulus oocyte complexes, COCs),在含有0.6%葡萄糖的TCM199中添加不同浓度的胰岛素（0、3、6、9 IU/mL）,38.5 ℃、5% CO2培养箱内成熟培养,观察卵丘扩散程度,剥离卵丘细胞获得裸卵后,室温下固定15 min;Hoechst 33342染色,压片,荧光显微镜下观察核形态,用SPSS 14.0软件统计试验数据。不同浓度胰岛素培养48 h后,各组卵丘细胞扩散效果都不明显;卵母细胞核成熟期没有达到减数分裂中期（MⅡ）,但是6 IU/mL胰岛素组生发泡破裂期（GVBD）比率（35.88%±14.63%）显著高于对照组（11.25%±9.75%）;6 IU/mL胰岛素组延长培养时间至72和96 h后,MⅠ-MⅡ期卵母细胞成熟率分别为13.33%±1.5%、20.8%±1.9%。以上结果表明,犬体外成熟培养基中添加胰岛素既没有提高犬卵母细胞核成熟到MⅡ期,也没有改善犬卵母细胞卵丘扩散效果。但是,在6 IU/mL浓度下延长培养时间,相对增加了成熟率。 相似文献
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在成熟过程中添加牛血清和猪卵泡液对猪卵母细胞核成熟及体外受精后早期胚胎发育的影响 总被引：24，自引：0，他引：24
研究目的在于探讨在成熟过程中添加牛血清和猪卵泡液对猪卵母细胞核成熟、卵丘细胞扩散及体外受精后早期胚胎发育的影响。卵母细胞·卵丘细胞复合体在含FSH和LH的以下处理组的成熟液中成熟培养 2 3～ 2 4h :(1)对照组-改良TCM - 199+0 .1%PVA ;(2 )试验组 1-改良TCM - 199+10 %新生牛血清 ;(3)试验组 2 -改良TCM - 199+10 %猪卵泡液 ,再移至无FSH和LH的不同处理组的成熟液中成熟培养 2 3～ 34h。试验 1中 ,卵母细胞在 4 6～ 4 8h成熟培养后 ,观察卵丘细胞扩散情况 ,并对卵母细胞进行固定和染色 ,鉴定卵母细胞减数分裂情况 :试验 2中 ,对在不同处理组的成熟液中成熟培养 4 6～ 4 8h的卵母细胞进行体外受精 ,再培养 8d。受精后第 2天检查分裂率、第 6天检查桑椹胚 /囊胚率、第 8天检查囊胚率。 4 6～ 4 8h成熟培养后试验组 1和试验组 2的大部分卵母细胞 -卵丘细胞复合体的卵丘细胞完全扩散 ,而对照组的卵丘细胞只有 5 0 %扩散。试验组 1和试验组 2的卵母细胞核成熟率分别为 39.9% (77/ 193)和 4 4 .3% (93/ 2 10 ) ,与对照组的卵母细胞核成熟率 4 8.1% (99/ 2 0 6 )相比没有显著差异 (P <0 .0 5 )。卵母细胞分裂率试验组 1(5 0 .0± 1.8) %和试验组 2 (49.9± 2 .6 ) %与对照组的卵母细胞分裂率 (49.0± 2 相似文献
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本实验旨在研究甘氨酸对卵丘细胞及卵母细胞体外成熟质量的影响,优化猪卵母细胞体外成熟(IVM)培养体系。在猪卵母细胞体外成熟培养液中添加6 mmol/L甘氨酸,体外培养至44 h后,通过倒置显微镜测量卵丘细胞扩散直径,结合流式细胞术与qPCR检测卵丘细胞凋亡情况;进一步检测成熟卵母细胞中谷胱甘肽(GSH)、细胞成熟促进因子(MPF)和丝裂原活化蛋白激酶(MAPK)水平及细胞成熟相关基因表达。结果表明:甘氨酸能显著提高卵丘细胞扩散直径,减少卵丘细胞的总凋亡率,并能显著提高卵丘细胞中Bcl-2的mRNA表达;甘氨酸能显著增加成熟卵母细胞中的GSH、MPF和MAPK水平以及成熟相关基因BMP15、GDF9、CyclinB1、CDK1、C-MOS的mRNA表达。综上可知,甘氨酸可提高猪卵母细胞体外成熟质量,降低卵丘细胞凋亡率。 相似文献
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《黑龙江畜牧兽医》2020,(2)
为了分析外源激素促卵泡激素(FSH)对绵羊卵丘颗粒细胞增殖的影响,试验分离并体外培养了绵羊卵丘颗粒细胞,然后使用促卵泡激素受体(FSHR)免疫组织化学法鉴定了分离培养的细胞,进而分析了添加不同浓度FSH对细胞增殖速度的影响。结果表明:将卵丘颗粒细胞从卵丘颗粒细胞-卵母细胞复合体(COCs)上分离24 h之后,能够观察到部分卵丘颗粒细胞开始贴壁,传代之后细胞形态未发生明显变化。FSHR免疫组织化学法鉴定结果证明分离培养的绵羊卵丘颗粒细胞能够特异性地表达FSHR。培养基中添加FSH后,在培养前4 d,高浓度(100 ng/mL)和低浓度(10 ng/mL)的FSH均能促进卵丘颗粒细胞的增殖,但在培养6 d之后,高浓度的FSH对卵丘颗粒细胞的增殖存在抑制作用。说明外源激素FSH在不同浓度下对卵母颗粒细胞的增殖具有不同的影响。 相似文献
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试验旨在研究不同激素配比及表皮生长因子(EGF)浓度对牛卵母细胞体外成熟及卵母细胞质量的影响。将随机分组的卵丘-卵母细胞复合体于添加FSH+LH、HMG、FSH+LH+E2、HMG+E2 4种不同激素组合配比的成熟基础液中培养,对比其体外成熟率,比较了EGF对牛卵母细胞体外成熟率和孤雌胚胎体外发育的影响,并采用TUNEL法检测添加不同浓度EGF的牛孤雌激活囊胚细胞凋亡情况。结果表明,添加HMG的成熟试验结果稳定,E2对牛卵母细胞成熟有一定的促进作用,HMG+E2联合使用可以得到高效稳定的成熟结果;在此基础上,在成熟液中添加30 ng/mL EGF对牛卵母细胞的成熟质量、胚胎发育及降低胚胎细胞凋亡都有明显的促进作用。因此,在体外成熟培养液中添加0.075 IU/mL HMG、1 μg/mL E2和30 ng/mL EGF对牛卵母细胞的成熟和质量较为有益。 相似文献
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《现代畜牧兽医》2021,(10)
试验旨在研究猪卵母细胞体外培养过程中粒细胞-巨噬细胞集落刺激因子(GM-CSF)对卵丘细胞的影响。在成熟培养液不变的情况下添加10μg/L和100μg/L的GM-CSF,对卵丘卵母细胞复合体(COC)分别培养12、24、48 h,运用CCK8检测试剂盒检测卵丘细胞活性。收集培养48 h的COC,观察卵丘细胞扩展情况,统计卵母细胞极体排出率。结果显示,GM-CSF对卵母细胞极体排出率无显著影响,但有助于3～4级卵丘细胞的扩散。100μg/L的GM-CSF作用48 h,能够极显著提高卵丘细胞的细胞活性(P0.01)。研究表明,100μg/L的GM-CSF可促进COC中3～4级卵丘细胞的扩展。 相似文献
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《畜牧兽医学报》2019,(12)
旨在探索SIRT1在牦牛卵母细胞体外成熟与老化过程中的作用。本研究在体外成熟液中分别添加SIRT1特异性激动剂SRT2104 (SRT组)和特异性抑制剂Inauhzin (INZ组),牦牛卵丘卵母细胞复合体(COCs)体外培养24 h后,观察卵丘细胞的扩展和第一极体的排出情况;利用免疫荧光检测体外培养24与36 h后卵母细胞内的ROS水平;采用实时荧光定量PCR法检测体外培养24与36 h后卵母细胞内SIRT1、FOXO3a、SOD2以及Bax的表达水平;体外培养24与36 h后的牦牛卵母细胞进行体外受精,观察并统计其卵裂率与囊胚形成率。结果显示,体外培养24 h,SRT组的卵丘细胞扩展程度显著高于对照组(P0.05),而INZ组的卵丘细胞扩展程度和第一极体排出率显著低于对照组(P0.05)。随着体外培养时间的增加,卵母细胞内的ROS水平显著增加(P0.05);添加SRT2104能显著抑制卵母细胞中ROS水平的积累(P0.05),而添加Inauhzin则显著上调卵母细胞内的ROS水平(P0.05)。体外培养24 h后,SRT组SIRT1、FOXO3a与SOD2的表达水平显著高于对照组(P0.05),但Bax的表达水平显著降低(P0.05);INZ组的SIRT1、FOXO3a与SOD2表达均显著低于对照组(P0.05),但Bax的表达水平显著上调(P0.05)。牦牛卵母细胞体外培养24 h后,SRT组的卵裂率与囊胚形成率显著高于INZ组和对照组(P0.05);卵母细胞体外培养36 h后,INZ组的卵裂率和囊胚形成率显著低于其他组(P0.05)。综上表明,SIRT1参与了牦牛卵母细胞的体外成熟,在体外培养液中适当添加SIRT1激动剂,有利于卵母细胞体外成熟及缓解老化,同时改善早期胚胎的发育能力。 相似文献
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牛卵丘细胞对卵母细胞体外成熟与孤雌发育的影响 总被引：1，自引：0，他引：1
试验以牛卵泡内卵丘-卵母细胞复合体(COCs)为材料,探讨了牛卵丘细胞包裹程度对卵母细胞体外成熟(IVM)和孤雌胚胎(PAEs)发育的影响。试验1,将COCs随机分为2组,在开展IVM前,将其中一组COCs的卵丘细胞机械吹打去除成为机械裸卵(DOs),研究卵丘细胞层存在与否对卵母细胞体外核成熟(排出第一极体)和孤雌激活后发育能力的影响;试验2,根据COCs卵丘细胞包裹层数将COCs分为3组,即卵丘细胞层少(1～4层)的COCs为A组、卵丘细胞层多(5层以上)的COCs为B组及包裹5层以上卵丘细胞且附带卵泡壁颗粒细胞层(FSP)的COCs为C组,研究卵丘细胞层包裹程度对卵母细胞的体外核成熟和孤雌激活后胚胎发育能力的影响。结果表明:卵丘细胞的存在更有利于卵母细胞体外成熟和孤雌胚胎发育;COCs中卵丘细胞包裹层数对卵母细胞体外核成熟率没有显著影响,但包裹卵丘细胞层数多且附带FSP的卵母细胞,其PAEs的囊胚率显著高于包裹卵丘细胞少的卵母细胞PAEs。 相似文献
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《中国畜牧杂志》2019,(10)
本研究旨在探讨锌对牛卵母细胞体外成熟及体外受精胚胎发育的影响。首先使用锌螯合剂TPEN去除锌,并检测缺锌对牛卵母细胞体外成熟的影响;然后在体外成熟液中分别添加0(对照组)、0.4、0.8、1.2、1.6μg/mL硫酸锌,探索不同浓度硫酸锌对体外成熟及后续胚胎发育的影响。结果表明:锌元素在体外成熟液中的含量低于牛卵泡液和颈静脉血清(P<0.05);去除体外成熟液中的锌后牛卵母细胞的体外成熟效率下降(P<0.05),且具有时间依赖性,补充适宜浓度硫酸锌后成熟效率恢复;向体外成熟液中添加硫酸锌并未对卵母细胞体外成熟效率产生显著影响,但添加0.8μg/mL硫酸锌成熟后的卵母细胞中活性氧含量显著降低,后续体外受精胚胎的囊胚发育效率显著提高;RT-qPCR分析结果显示,与对照组相比,添加0.8μg/mL硫酸锌成熟后的卵母细胞中抗氧化基因SOD1、CAT、TXN1、PRD1和卵丘扩展基因PTX3、TSG6的表达水平均提高(P<0.05)。研究表明,添加0.8μg/mL硫酸锌可以通过提高卵母细胞内抗氧化酶基因的表达水平,降低卵母细胞内活性氧含量,促进卵丘扩展,从而提高卵母细胞成熟质量和体外受精胚胎的发育效率。 相似文献
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组织蛋白酶对成年绵羊卵母细胞体外发育能力的影响 总被引：1，自引：0，他引：1
本研究旨在观察绵羊卵丘细胞中组织蛋白酶( CTSS、CTSB)的mRNA在体外成熟过程中的表达规律,探明卵丘细胞中组织蛋白酶( CTSS、CTSB) mRNA的表达与卵母细胞体外发育能力之间的相关性.采用Real-time PCR方法检测绵羊在体外成熟0、8、16和24 h的卵丘细胞中组织蛋白酶(CTSB、CTSS)的mRNA表达水平,以及在成熟液中添加组织蛋白酶抑制剂(E-64)后卵丘细胞中CTSB和CTSS的mRNA表达量在体外成熟前及体外成熟后的表达水平,并测定在成熟液中添加1、5、10 μmol·L-1 E-64对卵母细胞成熟率、受精率及囊胚发育率的影响.结果,卵丘细胞中的CTSS和CTSB mRNA表达均随着体外成熟时间的增加(IVM 0 h、IVM 8 h和IVM 16 h)呈下降的趋势(P＜0.01).添加5和10 μmol· L-1 E-64组的卵丘细胞中CTSS和CTSB mRNA表达水平较对照组和1 μmol· L-1组均显著性降低(P＜0.01),而5和10μmol·L-1组间的CTSS和CTSB mRNA表达水平无显著差异(P＞0.05).成熟液中添加5和10 μmol·L-1的E-64组的囊胚发育率(26.82％和30.95％)显著高于1 μmol· L-1组和对照组(18.23％和15.63％,P＜0.05),但5和10 μmol·L-1组对卵母细胞的成熟率及卵裂率与1 μmol· L-1组和对照组间无显著性差异(P＞0.05).结果表明,绵羊卵丘细胞中CTSS和CTSB的mRNA表达水平在体外成熟过程中呈下降趋势,其mRNA表达水平与胚胎的发育能力呈负相关;组织蛋白酶特异性抑制剂E-64可下调绵羊卵丘细胞中CTSS和CTSB的mRNA表达水平,并提高卵母细胞随后的体外发育能力. 相似文献
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Effect of Follicle Stimulation Hormone and Luteinizing Hormone on Cumulus Cell Expansion and In Vitro Nuclear Maturation of Canine Oocytes 总被引：2，自引：0，他引：2
H-S Lee Y-I Seo X-J Yin S-G Cho S-S Lee N-H Kim S-K Cho I-K Kong 《Reproduction in domestic animals》2007,42(6):561-565
In general, follicle-stimulating hormone (FSH) and luteinizing hormone (LH) play important roles in the regulation of cumulus cell expansion and oocyte maturation. We investigated the effects of supplementation of FSH or LH in in vitro maturation (IVM) medium on the incidence of cumulus cell expansion and nuclear maturation in canine oocytes. Cumulus-oocyte complexes (COCs) were cultured in TCM-199 supplemented with 10% foetal bovine serum (FBS), 1 mg/ml cysteine, 0.2 mm pyruvic acid and different concentrations of FSH or LH (control, 0.5, 5 or 50 microg/ml) at 38.5 degrees C, 5% CO(2) in air for 72 h. The cumulus cell expansion was measured by microscopic visualization, and nuclear maturation of denuded oocytes was determined by staining with 10 microg/ml Hoechst33342 for 30 min. The cumulus cell expansion in the 5 microg/ml FSH group (397.2 +/- 64.3 microm) was significantly higher than those in the control, 0.5, and 50 microg/ml FSH groups (168.3 +/- 19.1, 286.0 +/- 69.7 and 300.0 +/- 84.3 microm, respectively; p < 0.05). However, there was no difference in cumulus cell expansion among the control, 0.5, 5 and 50 microg/ml LH groups (165.6 +/- 20.2, 160 +/- 26.5, 172 +/- 20.5 and 168 +/- 23.1 microm, respectively; p > 0.05). After 72 h of IVM, the proportion of nuclear development to the MI-MII stage in the 0.5 microg/ml FSH group (15.1%) was higher than those in the control, 0.5 and 50 microg/ml FSH groups (0.9%, 6.5% and 8.0%, respectively; p < 0.05). However, there was no significant difference in nuclear maturation to the MI-MII stage among control, 0.5, 5 and 50 microg/ml LH groups (4.6%, 2.3%, 5.4% and 8.6%, respectively; p > 0.05). This study indicated that a FSH supplement in IVM medium can increase cumulus cell expansion and nuclear maturation, while the nuclear maturation rate remained low. Further studies are required to improve the nuclear development to the MI-MII stages in canine oocytes. 相似文献
17.
The aim of the present study was to improve cytoplasmic maturation of porcine oocytes by the addition of lycopene into in vitro maturation (IVM) media. We designed six experimental groups; IVM medium was supplemented with 10 IU/ml FSH, FSH and 10 IU/ml human chorionic gonadotrophin (hCG), or FSH and 7 μm lycopene in the first half of the IVM culture (0–22 h) followed by further culture (22–44 h) with or without hCG. The addition of lycopene into IVM media delayed the interruption of communication between an oocyte and the cumulus cells. Although meiotic competence was similar among the six groups, the glutathione level of matured oocytes was significantly higher in the lycopene‐supplemented group (9.89 pmol per oocyte) than that in other groups (7.25 and 7.81 pmol per oocyte). Fertilization rate was significantly improved in lycopene‐supplemented groups (58.3%) more than that in the group supplemented with FSH only (43.1%), whereas there were no differences in developmental competence among the groups (blastocyst rate: 20.1–29.5%). These results indicate that insufficient cytoplasmic maturation during conventional IVM resulted by disconnection of the gap junction between an oocyte and the cumulus cells in the early phase during IVM culture. We concluded that lycopene induced a prolonged sustainment of gap junctional communication between an oocyte and the cumulus cells during porcine IVM culture, which was an effective cytoplasmic maturation of porcine IVM oocytes. 相似文献
18.
The nature of cumulus--oocyte complexes was examined in PMSG (group 1, n = 18) and FSH (group 2, n = 30) stimulated heifers. Laparoscopy was performed 65 h after cloprostenol application. The number of follicles was 13.67 +/- 0.75 and 12.67 +/- 0.81 (P greater than 0.05) in group 1 and 2, respectively (Tab. I). The recovery rate of oocytes was 56% in the first and 67% in the second group (Tab. I). The cumulus oophorus was divided into three groups: compact, expanded and partial (Tab. II). Most oocytes (65 and 75% in the first and second group, respectively) exhibited an expanded cumulus (P greater than 0.05). In the first and second group 11 and 26% (P less than 0.01) of oocytes with the extruded first polar body were aspirated (Tab. III). As judged from the pool of visible follicles, the superovulation response to stimulatory treatment and recovery rate of oocytes in the present experiment were not different from the results published earlier. The degree of the cumulus oophorus expansion is an indicator for the evaluation of cumulus--oocyte complexes. After the preovulatory LH peak the disintegration of cumulus oophorus proceeds from glycosaminoglycan accumulation. In our experiment this effect resulted in a significantly higher number of oocytes with expanded cumulus in both treatments. The enlargement of perivitelline space is related to a subsequent release of the first polar body in the preovulatory period. It can be seen from our results that after FSH treatment it is possible to reach the high number of oocytes with the extruded polar body.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
19.
The present study was conducted to investigate whether a portable CO2 incubator was effective for in vitro maturation (IVM) of bovine, porcine and minke whale oocytes, and the effect of maturation media supplemented with different hormones; porcine follicle stimulating hormone (pFSH), estradiol-17beta (E2), or pregnant mare's serum gonadotropin (PMSG): human chorionic gonadotropin (hCG) for minke whale immature oocytes was also examined. In vitro maturation rates of bovine and porcine oocytes cultured in the portable CO2 incubator were not significantly different from the standard CO2 incubator. In minke whale IVM culture using the portable incubator, the maximum expansion of cumulus mass was observed by pFSH/E2 and PMSG/hCG at the end of IVM culture. Moreover, the IVM culture period was shortened to 28-30 h from 96-120 h previously reported. The proportion of matured oocytes cultured in the medium supplemented with pFSH/E2 (26.7%) was significantly higher (P<0.05) than that with PMSG/hCG (6.9%). The present study indicates that a portable CO2 incubator is a useful device for minke whale IVM culture on a research base ship, and the addition of pFSH/E2 into an IVM medium enhanced cumulus expansion and the proportion of minke whale matured oocytes. 相似文献