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1.
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
2.
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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4.
《中国畜牧杂志》2019,(8)
本实验旨在研究有无卵丘细胞对卵母细胞成熟及其胚胎发育能力的影响。实验分别设裸卵组、卵丘细胞与卵母细胞共培养组、卵丘-卵母细胞复合体(COCs)组(对照组),检测猪成熟卵母细胞的存活率、极体率、孤雌激活后的卵裂率、囊胚率及各组卵母细胞的谷胱甘肽合成相关基因的表达。结果表明:COCs组卵母细胞经体外培养42 h后其存活率最高(95.76%),高于裸卵组(P<0.05)和共培养组(P>0.05);COCs组第一极体排出率为71.77%,高于共培养组和裸卵组(P<0.05);COCs组在后期发育中卵裂率与囊胚率高于共培养组和裸卵组(P<0.05),而共培养组的卵裂率及囊胚率高于裸卵组(P<0.05);与COCs组相比,裸卵组显著下调了GCLM、GCLC的表达(P<0.05),共培养组中GCLM的表达与COCs组无显著差异。研究结果显示,卵丘细胞对卵母细胞的成熟及发育均有显著影响,在卵母细胞成熟过程中,卵母细胞与卵丘细胞的缝隙连接受损会对卵母细胞的成熟效率产生影响,并且在卵母细胞后期发育中,缝隙连接的完整性与否会影响后期发育能力,并可推论出随着卵丘细胞的减少和缝隙连接的破坏,会造成谷胱甘肽合成基因表达降低,从而影响卵母细胞内的谷胱甘肽合成。 相似文献
5.
为了初步了解组织型纤溶酶原激活剂(tissue-plasminogen activator,tPA)在牛卵丘－卵母复合体体外成熟进程中的潜在作用,试验运用实时定量RT-PCR技术分别检测体外成熟过程中不同时间段(0、8、16、24 h)以及添加不同浓度FSH成熟培养16 h后的牛卵丘细胞和卵母细胞中tPA基因相对表达变化,观察添加不同浓度FSH成熟培养16 h后卵丘细胞膨胀程度差异,并统计卵母细胞第一极体排出情况。结果显示,卵丘－卵母复合体在体外成熟初期,tPA mRNA相对表达水平在体外成熟16和24 h的卵丘细胞和卵母细胞中显著高于0和8 h组;在添加不同浓度FSH (0、0.01、0.1和1 IU/mL)体外成熟16 h的各处理组,卵丘细胞中tPA mRNA相对表达量随FSH添加浓度的升高而升高,卵丘细胞的扩散程度亦随之增加;同时tPA mRNA相对表达量在0.01 IU/mL FSH添加组卵母细胞中显著高于其他各FSH添加组。综合以上研究结果,本研究认为,牛卵丘细胞中tPA基因的表达受FSH正向调节;tPA可能促进了卵丘细胞在体外成熟过程中的扩散;同时,tPA在卵母细胞中的表达是否与其第一极体排出有关,需进一步试验验证。 相似文献
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卵丘细胞与卵母细胞的解离会降低小鼠卵母细胞的成熟质量,该研究将解离所得裸卵用不同种成分明确的成熟培养液进行体外成熟、体外受精、体外发育,从而确定卵丘细胞与卵母细胞的解离对小鼠卵母细胞成熟、受精、发育的影响,并通过筛选建立起最优的试验体系,为去除卵丘细胞的卵母细胞体外成熟质量的提高及后续研究提供参考依据。结果显示,裸卵的成熟率与成熟培养液的选择密切相关,TYH组、HTF组极显著优于M199组、α-MEM组;卵丘细胞与卵母细胞的解离与否对受精率的影响是巨大的,解离后(10%～28%)与解离前(48%～76%)差异极为显著(P<0.01);卵丘细胞与卵母细胞的解离与否对发育率的影响未发现显著差别(P>0.05)。因此,卵丘细胞与卵母细胞的解离主要影响了小鼠卵母细胞的体外受精率,通过选用适当的培养液可以相对改善该情况。 相似文献
7.
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
8.
主要探讨无卵丘水牛卵母细胞体外成熟的可行性,以便为研究卵母细胞成熟机理提供模型。无卵丘的水牛卵母细胞随机分为5组,然后分别进行直接成熟培养（M1）,与卵丘细胞单层共培养（M2）,用未扩展的卵丘细胞块包围培养（M3）,与扩展的卵丘细胞团共培养（M4）和用卵巢组织包围培养（M5）。无卵丘的水牛卵母细胞体外成熟培养24 h后检查第一极体（PB1）排出率,随后对这些卵母细胞进行孤雌激活,评定其成熟质量。结果发现,M4组的第一极体排出率明显高于M1组和M5组,其它各组间没有显著差异（P〉0.05）;M5组的孤雌激活卵裂率显著低于M1组和M4组（P〈0.05）,而与M2组和M3组没有显著差异（P〉0.05）,但M3和M4两组的囊胚发育率显著高于M1组和M5组（P〈0.05）。这些研究结果表明：（1）未扩展卵丘细胞包围法和扩展卵丘细胞团支撑法可促进无卵丘水牛卵母细胞的体外成熟,但与卵丘细胞单层共培养没有作用;（2）卵巢组织包围培养不利于水牛卵母细胞的体外成熟。 相似文献
9.
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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观察了卵丘细胞共培养对小鼠生发泡期部分裸露（PNO）和裸卵（NO）成熟和发育能力的影响；分别用小鼠、大鼠、猪的卵丘细胞与小鼠PNO和NO进行了共培养。检测了小鼠PNO和NO的减数分裂能力、生发泡构型、受精和胚胎发育能力。结果，PNO、NO的减数分裂能力显著（P〈0．05）低于卵丘完整复合体（COCs）的减数分裂能力。COCs中SN型卵母细胞比率显著高于PNO和NO中SN型卵母细胞比率（P〈0．05），大部分PNO和NO的卵母细胞核型为NSN型。与对照组相比，与小鼠或大鼠卵丘细胞共培养的小鼠PNO和NO的减数分裂能力没有显著提高，但是与猪卵丘细胞共培养却可以提高小鼠PNO和NO的减数分裂能力。结果表明，猪卵丘细胞能促进小鼠卵母细胞的体外成熟，但并不影响小鼠卵母细胞的受精和胚胎发育。 相似文献
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Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(9):324-328
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).
Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.
相似文献12.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(6):504-508
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
13.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(10):323-327
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal.
Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection.
相似文献14.
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Slocombe JO Villeneuve A 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(10):630-633
In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
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In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated.
Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively.
相似文献17.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(8):641-646
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
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Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):491-495
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%).
Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada.
相似文献19.
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Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1984,25(9):347-350
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario.
Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously.
相似文献