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1.
主要比较了离子霉素、电脉冲及培养基更换对牛羊体外成熟卵母细胞孤雌激活的影响。两种方法对牛胚胎的研究中,牛胚胎卵裂率无显著差异(90.61%vs94.40%,P>0.05),而离子霉素激活胚胎的囊胚发育率极显著高于电激活方法(12.3%vs2.4%,P<0.01)。两种方法对羊胚胎的研究中,羊胚胎卵裂率无显著差异(72.4%vs77.4%,P>0.05)。但是离子霉素激活胚胎的囊胚发育率显著高于电激活方法(3.67%vs10.4%,P<0.05)。本试验还采用两种方法来培养牛化学激活孤雌胚。方法一是把化学激活牛体外成熟卵母细胞放于SOFaa(Synthetic Oviduct Fluid aa)培养基中连续培养7d;方法二是把化学激活牛体外成熟卵母细胞放于SOFaa培养基中4 d后,再转移进入含有10?S(Fetal Bovine Serum)的SOFaa培养基中继续培养3 d。试验结果表明:方法一中的囊胚发育率显著高于方法二(11.64%vs3.49%,P<0.01)。这也说明了更换培养基不利于其体外囊胚发育率。 相似文献
2.
曲古抑菌素A（Trichostatin A,TSA）是一种组蛋白去乙酰化抑制剂,用TSA处理鼠核移植胚胎可显著提高胚胎的囊胚率。检验TSA对猪卵母细胞体外成熟以及孤雌胚胎发育的影响。在猪卵母细胞体外成熟液及胚胎培养液中添加TSA,比较不同浓度TSA对卵母细胞成熟的影响,不同浓度TSA对孤雌胚胎发育能力的影响以及TSA处理不同时间对孤雌胚胎发育能力的影响。结果发现：（1）5nmol／LTSA处理对卵母细胞体外核成熟无显著影响,却显著提高了卵母细胞孤雌胚胎的卵裂率和囊胚率（P〈0．05）;（2）50nmol／LTSA处理显著提高了孤雌胚胎的卵裂率及囊胚率（P〈0．05）;（3）50nmol／LTSA处理24h能显著提高胚胎的卵裂率及囊胚率（P〈0．05,82．1％±2．6％和37．4％±3．1％）。结果表明TSA对猪卵母细胞的体外成熟及孤雌胚胎发育具有显著的促进作用。5nmol／L的添加量对卵母细胞的体外胞质成熟具有促进作用;胚胎培养基中添加50nmol／LTSA处理24h能提高孤雌胚胎的发育能力。 相似文献
3.
应用绵羊精子提取物体外激活绵羊体细胞核移植胚和山羊-绵羊异种核移植胚，比较了不同浓度的绵羊精子提取物对绵羊同种和异种重构胚的激活作用，并与传统的化学激活方法对重构胚的卵裂率、囊胚率和囊胚细胞数做了比较。结果表明，绵羊精子提取物可以有效地激活绵羊体细胞核移植胚和山羊-绵羊异种核移植胚，每一重构胚注射3pL浓度为5mg／mL的绵羊精子提取物，对同种和异种胚的发育效果均为最好，并显著高于其他试验组（P〈0．05）。注射绵羊精子提取物对绵羊-山羊异种核移植胚的卵裂率、囊胚率和囊胚细胞数的影响，与离子霉素联合6-DAMP激活法差异不显著（P〉0．05）。注射绵羊精子提取物对绵羊同种核移植胚的卵裂率和囊胚率的影响，与离子霉素联合6-DAMP激活法差异也不显著（P〉0．05），但精子提取物注射法的绵羊核移植胚的囊胚细胞数显著（P〈0．05）高于化学激活法的细胞数（72．4vs65．2）。 相似文献
4.
牛胚胎体外生产技术的简化研究 总被引：2，自引：0，他引：2
利用屠宰牛卵巢分离的卵母细胞，以卵裂率和囊胚发育率为标准，对牛胚胎体外生产过程进行了简化试验。结果显示：不加卵丘细胞的高密度卵母细胞体外成熟（１００￣２００枚／平皿）可代替加卵丘细胞的标准密度（５０枚／平皿）培养，其卵裂率（５７．６％比６２．５％）和囊胚发育率（２３．７％比２９．１％）没有显著差异（Ｐ〉０．０５），体外授精时间可从成熟培养后２２ｈ延长至２７ｈ，卵裂率和囊胚发育率均没有显著变化，卵母 相似文献
5.
研究培养液中血清的添加时间和添加浓度及不同培养体系对牛孤雌胚胎体外发育潜力的影响。结果表明：牛成熟卵母细胞孤雌激活后的第3天添加10％的FBS对孤雌胚的体外发育效果；良好。4种培养体系在孤雌激活后的第3天添加10％的FBS，平均囊胚率分别可达46．25％（SOFaar）、43．58％（CRlaa）、40．25％（KSOMaa）、17．98％（TCM199）；TCM199组的囊胚率显著低于其他3组（P〈0.05），SOFaa优于CRlaa和KSOMaa组，但差异不显著（P〉0．05）。 相似文献
6.
牛胚胎体外生产技术的简化研究 总被引：2，自引：0，他引：2
利用屠宰牛卵巢分离的卵母细胞，以卵裂率和囊胚发育率为标准，对牛胚胎体外生产过程进行了简化试验。结果显示：不加卵丘细胞的高密度卵母细胞体外成熟（１００～２００枚／平皿）可代替加卵丘细胞的标准密度（５０枚／平皿）培养，其卵裂率（５７．６％比６２．５％）和囊胚发育率（２３．７％比２９．１％）没有显著差异（Ｐ＞０．０５），体外授精时间可从成熟培养后２２ｈ延长至２７ｈ，卵裂率和囊胚发育率均没有显著变化，卵母细胞体外成熟后可以不经洗涤直接移入受精滴，原成熟培养皿内残留卵丘细胞再培养４８ｈ形成的单层细胞，可代替标准方法制作的单层小滴用于体外受精胚胎的共同培养，供胚胎发育培养的单层细胞使用多次不影响囊胚发育率，经简化的ＩＶＦ技术获得的胚胎非手术移入情期同步受体牛子宫角２～２．５个月后直检有５８．３％（７／１２）妊娠。我们认为，传统的牛胚胎体外生产技术经过简化可以提高生产效率，不会减少囊胚发育率和妊娠率，值得推广应用。 相似文献
7.
不同细胞因子对山羊卵母细胞体外成熟与早期胚胎发育的影响 总被引：1，自引：0，他引：1
研究在培养液中添加不同浓度的GDNF、LIF、SCF及其不同组合对山羊卵母细胞体外成熟和早期胚胎发育的影响。结果表明：SCF、LIF、GDNF对山羊卵母细胞体外成熟有显著影响（62．0％、75．5％、63．7％vs53．0％,P〈0．05）,不同浓度间无显著影响（P〉0．05）,添加LIF、GDNF对卵裂率有显著影响（48．1％、43．3％vs26．2％,P〈0．05）,SCF对卵裂率无显著影响（37．6％vs26．2％P〉0．05）,不同细胞因子都能显著提高囊胚率（21．6％、27．3％、26．2％vs6．3％,P〈0．05）。10IU·mL^-1的LIF、15Iu·mL^-1的GDNF和15IU·mL^-1的SCF对山羊胚胎体外生产最好;GDNF＋LIF＋SCF组和GDNF＋LIF组卵母细胞成熟率显著高于LIF＋SCF,GDNF＋SCF,GDNF和LIF组（83．3％、80．3％vs72．8％、65．4％、63．3％、77．9％,P〈0．05）,GDNF＋SCF和LIF＋SCF添加组间对卵母细胞体外成熟无差异（72．8％vs65．4％,P〉0．05）,早期胚胎发育上GDNF＋LIF＋SCF组优于GDNF＋LIF、LIF＋SCF和GDNF＋SCF组,且均能显著提高卵裂率（50．2％、48．9％、47．9％、43．7％vs21．4％,P〈0．05）和囊胚率（31．3％、27．6％、25．5％、24．3％vs13．6％,P〈0．05）。可见GDNF、LIF和SCF能提高卵母细胞的成熟率,早期胚胎的卵裂率和囊胚率,LIF和GDNF对卵母细胞体外成熟有协同作用。 相似文献
8.
利用Leptin和ITS促进体外成熟和体外培养的牛卵母细胞的发育和质量,探讨提高胚胎体外生产的质量和数量的方法和技术。试验1：体外受精胚胎的培养液：添加BSA的KSOM中添加10mL/L浓度的ITS,结果使胚胎的桑椹胚率和囊胚率显著（P〈0.05）高于培养液中不加ITS的对照组（桑椹胚率：43.48%vs29.07%,囊胚率：22.83%vs11.63%）,卵裂率、正常分裂率和8细胞率与对照组差异不显著（P〉0.05）。试验2：在卵母细胞的体外成熟液中添加10μg/L具有生物学活性的重组鸡Leptin成熟肽融合蛋白,Leptin处理组和对照组卵母细胞经体外成熟、受精后转入加有10mL/LITS的KSOM培养液进行体外培养。试验组卵裂率和正常分裂率极显著（P〈0.01）高于对照组（88.96%vs66.81%和61.11%vs29.36%）,8细胞率显著（P〈0.05）高于对照组（84.84%vs69.57%）。Leptin处理的卵母细胞在受精后的桑椹胚率和囊胚率与对照组差异不显著,但最后的囊胚数量较对照组增加1倍多,分别为IVF卵母细胞总数的14.8%和6.4%（P〈0.01）。这说明,添加Leptin对牛卵母细胞体外成熟有促进作用,可显著提高卵母细胞受精后早期胚胎的卵裂率、正常分裂率和8细胞率;加入ITS则能提高桑椹胚率和囊胚率;而Leptin和ITS的按顺序结合使用,则能大大增加体外生产胚胎的桑椹胚和囊胚的数量,从而提高胚胎体外生产的效率。 相似文献
9.
《广东畜牧兽医科技》2015,(4)
通过后期去除激素培养比较了卵丘卵母细胞成熟及构建克隆胚后的发育情况,同时孤雌胚胎和体外受精胚胎体外培养48 h后全量换液,比较了其卵裂率和囊胚率之间的差异。结果显示,卵丘卵母细胞培养22h后换成不含激素的成熟培养液继续培养至44 h,其成熟率与对照组无显著差异(P0.05);后期克隆胚胎卵裂率和囊胚率与对照组均无显著差异(P0.05)。孤雌胚胎换液培养卵裂率高于未换液组,囊胚率低于未换液组,但差异均不显著(P0.05)。体外受精胚胎换液培养卵裂率以及囊胚率和未换液组差异不显著(P0.05)。本实验结果说明换液培养对卵母细胞的成熟及后续的体细胞克隆胚发育无显著影响,孤雌和体外受精胚胎换液培养对后期发育也无显著影响。 相似文献
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11.
采用高场强单次脉冲（1600V/cm,80μs）及低场强3次脉冲（400V/cm,20μs,每次间隔20min）刺激体外成熟牛卵母细胞（成熟26h）,激活率分别为86.5%（167/193）和92.7%（101/109）,差异不显著（P>0.05）,其中多原核率分别为8.3%（16/193）和59.6%（65/109）,差异极显著（P<0.01）,但发育率差异不显著（20.6％和23.3％）。实验表明,电脉冲能显著提高牛成熟卵母细胞的激活率;多次电激会造成很大比例的多原核,但对卵母细胞的发育影响不大。 相似文献
12.
为了探讨人颗粒细胞共培养对牛卵母细胞体外成熟及孤雌激活的影响,将穿刺获得的牛卵母细胞随机分为试验组和对照组,试验组以人颗粒细胞作为滋养层与牛卵母细胞在体外成熟液中共培养,对照组仅使用与试验组相同的体外成熟液培养,观察并比较两组的极体排出率、孤雌激活囊胚形成率。结果发现,试验组的极体排出率（72.35％）显著高于对照组的极体排出率（52.86％）（P＜0.01）;经过孤雌激活后,试验组的囊胚形成率为12.82％,对照组为4.76％,两组之间无显著性差异（P＞0.05）。说明人颗粒细胞可以作为牛卵母细胞体外成熟时的滋养层,两者共培养可以提高牛卵母细胞体外培养的核成熟率。 相似文献
13.
不同培养液及血清浓度对绵羊孤雌生殖胚胎发育的影响 总被引：1，自引：0，他引：1
体外成熟的绵羊卵母细胞，经5 μmol/L A23187 5 min和2 mmol/L 6-DMAP 4 h激活后，分别在SOFaa、M-199两种培养液中进行培养，试验比较了SOFaa、M-199液分别添加BSA和不同浓度（10%、20%）胎牛血清对绵羊孤雌生殖胚体外发育的影响。M-199+FCS组的卵裂率显著低于SOFaa+BSA和SOFaa+FCS组（P<0.05），SOFaa+BSA组的囊胚率显著低于M-199+BSA、SOFaa+FCS、M-199+FCS三组（P<0.05）；SOFaa+10% FCS与SOFaa+20% FCS组的卵裂率及囊胚率均无显著差异，M-199+10% FCS和M-199+20% FCS组的卵裂率及囊胚率间均无显著差异。结果表明：SOFaa比M-199更适合绵羊孤雌生殖胚体外发育，此外添加10%的FCS即可达到较好的培养效果。 相似文献
14.
绵羊卵母细胞的孤雌激活 总被引：2，自引：0，他引：2
本文探讨了不同激活方法对绵羊卵母细胞的孤雌激活和其后的发育。结果表明 ,电激活可以激活绵羊卵母细胞孤雌发育到囊胚 ;Ca2 + 载体A2 3187和CHX组合 ,Ionomycin和 6 DMAP组合可以激活绵羊卵母细胞 ,其卵裂率与电激活相比差异显著。 7%乙醇激活绵羊卵母细胞 7min效果较好。不同场强、不同脉冲次数对绵羊卵母细胞激活都有影响 ,以 1.2kV/cm ,间隔 30 μs和 3次脉冲效果较好。而电激活与化学激活联合可以更好的激活绵羊卵母细胞 相似文献
15.
Miki H Ogonuki N Inoue K Baba T Ogura A 《The Journal of reproduction and development》2006,52(2):239-248
In micromanipulation experiments using immature oocytes, final ooplasmic maturation is often compromised because the oocytes are usually first freed from their nurturing cumulus cells. This study was undertaken to determine whether cumulus-free in vitro maturation (IVM) in mice could be improved by modifying IVM medium having defined components. Cumulus-free germinal vesicle (GV) stage oocytes were subjected to IVM in either alphaMEM medium, TYH medium, or a 1:1 mixture of the two (termed TaM). TYH medium produced a better maturation rate (181/196; 92.3%) than alphaMEM (184/257; 71.6%). However, alphaMEM supported better embryo development to the morula/blastocyst stage than TYH following in vitro fertilization (93.3% vs. 76.5%) or parthenogenetic activation (82.4% vs. 60.4%). Mitochondrial distribution in MII oocytes was diffuse following IVM in alphaMEM, but was aggregated with TYH. The maturation promoting factor (MPF) activity in MII oocytes was significantly higher in TYH than in alphaMEM (P<0.05). Oocytes cultured in TaM had intermediate characteristics and essentially resembled in vivo matured oocytes, with the mitochondrial distribution pattern being most typical of that condition. The highest rate of development from GV oocytes to full-term fetuses following in vitro fertilization and embryo transfer to foster mothers (23.8%) was obtained using TaM. When this IVM system was applied to MI oocytes injected with spermatocytes, offspring were first obtained without cytoplasmic replacement at MII. Thus, optimization of the culture medium can considerably improve the quality of cumulus-free oocyte IVM in mice. 相似文献
16.
培养液及血清浓度对山羊孤雌胚胎体外培养的影响 总被引：7，自引：0，他引：7
试验比较了在SOFaa，CRlaa，mCRlaa3种培养液中添加不同浓度的成年山羊血清(NGS)对山羊孤雌胚胎进行体外培养的效果。结果表明：在3种培养液中，添加10％的NGS对山羊孤雌胚胎的体外发育效果较好，囊胚率分别可达62．79％(81／129)、53．52%(38／71)、13．64％(12／88)；mCRlaa组囊胚发育率和囊胚细胞数显著低于SOFaa组和CRlaa组，SOFaa组优于CRlaa组．但SOFaa组和CRlaa组间无显著差异。在现有试验条件下，以在SOFaa培养液中．山羊孤雌胚胎的体外培养的第72小时时加入10％的NGS的发育效果较好，囊胚率可达62．79％。 相似文献
17.
A George RA Shah R Sharma P Palta SK Singla RS Manik MS Chauhan 《Reproduction in domestic animals》2011,46(3):444-447
Parthenogenetic activation using zona‐free oocytes offers an alternative model that could be applied to develop protocols for the activation of reconstructed embryos for cloning. The aim of this study was to compare the efficacy of different methods for the activation of zona‐free buffalo oocytes in terms of their effects on the developmental competence of parthenogenetic embryos. The effects of zona removal on parthenogenetic activation and in vitro developmental competence of metaphase II oocytes were also examined. All activation methods were followed by incubation of 2 mm 6‐dimethylaminopurine (6‐DMAP) for 4 h. Out of three different pulse strengths (1.2, 2.1 or 3.3 kV/cm) used, 2.1 kV/cm resulted in the highest blastocyst rate (25.3%). On comparing different chemical agents and electric pulse, highest blastocyst rate was observed for calcium ionophore (CaI) (28.6%) followed by ethanol (25.0%), electric pulse (22.5%) and combined CaI and ethanol treatment (16.7%) although differences among them were not significant. Furthermore, a significantly reduced developmental potential was observed in zona‐free oocytes when compared to zona‐intact ones up to the blastocyst stage (44.3% vs 27.1%). In conclusion, zona‐free buffalo oocytes can be successfully activated for parthenogenetic development using chemical or electrical stimulation. Out of different agents examined, CaI followed by 6‐DMAP resulted in the highest blastocyst rate. 相似文献
18.
Karja NW Otoi T Murakami M Wongsrikeao P Budiyanto A Fahrudin M Nagai T 《The Journal of reproduction and development》2005,51(6):783-786
This study was conducted to improve parthenogenetic development in vitro of feline oocytes following a combined activation treatment of electrical stimulation and cycloheximide. In vitro matured (IVM) oocytes were stimulated electrically by a DC electrical pulse of 2 kV/cm for 50 micros. The stimulated oocytes were then incubated in MK-1 medium with or without cycloheximide and subsequently cultured in vitro for 6 days. No significant differences were observed between the two groups with respect to the proportions of cleavage, development to the morula stage, and the cell number of blastocysts. However, exposure of electrically stimulated oocytes to cycloheximide significantly increased the rate of development of the stimulated oocytes into the blastocyst stage compared with oocytes stimulated by electrical stimulation alone (31.0% vs 6.7%). The results from the present study suggested that a single electrical stimulation was insufficient to activate the IVM cat oocytes at 24 h of maturation and that exposure to cycloheximide following electrical stimulation improved the efficacy of the parthenogenetic development of domestic cat oocytes. 相似文献
19.
Hyun S Lee B Lee G Lee E Lim J Kang S Hwang W 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2003,65(1):51-56
To evaluate whether oocytes excluded from somatic cell nuclear transfer (SCNT) could be utilized for embryo production by parthenogenetic activation (PA), porcine oocytes with poor morphology after maturation culture were excluded from SCNT and subsequently used for PA with different stimuli. In the first set of experiment, either electric pulse of different strengths (1.75, 2.0 or 2.25 kV/cm for 30 microsec each) or chemicals with different treatment durations [7% ethanol for 5 min followed by exposure to 6-dimethylaminopurine (6-DMAP) for 0, 2, 3 or 4 hr] was employed. Development to the 8-cell and morula stages was significantly (P<0.05) improved by electric stimulation of 2.0 kV/cm, while blastocyst formation was enhanced by chemical treatment of ethanol and 6-DMAP for 4 hr. Subsequently, oocytes were parthenogenetically activated by one of four stimuli; 1) optimal electric (2.0 kV/cm for 30 microsec), 2) optimal chemical (ethanol followed by 6-DMAP for 4 hr), 3) electric then chemical and 4) vice versa. On the other hand, oocytes with normal morphology were subjected to the same experimental treatments for the control. Regardless of oocyte type, a combination of electric and chemical stimulations did not further stimulate preimplantation development, compared with electric activation only. However, combinational treatment greatly increased the cell number of blastocysts in SCNT-excluded oocytes (21.9 to 22.9 vs. 16.9 cells/blastocyst), while such effect was not found in normal oocytes (22.2 to 23.3 cells/blastocyst). In conclusion, porcine oocytes excluded from SCNT still have a potential to develop blastocysts after PA and this might contribute to increasing the efficiency of SCNT for various purposes. A combined activation by electricity and chemical yielded the best rate of preimplantation development with increasing the quality of blastocyst. 相似文献
20.
试验旨在研究不同种类、不同浓度的糖对牦牛卵母细胞体外成熟和发育能力的影响,进一步探索和优化牦牛卵母细胞培养体系,提高卵母细胞体外成熟和胚胎生产效率。在牦牛卵母细胞成熟液中添加不同浓度（0、5和10 mmol/L）的葡萄糖或蔗糖,培养24 h或预培养2 h后移入无糖培养基中继续培养22 h,统计卵母细胞体外成熟率及体外受精（IVF）后的胚胎卵裂率和囊胚率。结果显示,与对照组（0 mmol/L）相比,5和10 mmol/L葡萄糖组牦牛卵母细胞核成熟率和体外受精胚胎卵裂率均显著提高（P<0.05）,10 mmol/L葡萄糖组的囊胚率最高,且与对照组相比差异显著（P<0.05）。添加10 mmol/L蔗糖可以显著提高牦牛卵母细胞核成熟率（P<0.05）,但胚胎囊胚率与对照组相比差异不显著（P>0.05）。此外,用10 mmol/L葡萄糖预处理牦牛卵母细胞后其核成熟率、胚胎卵裂率和囊胚率最高,且均显著高于对照组（P<0.05）。由此可见,糖对牦牛卵母细胞体外成熟和发育有一定的影响,在成熟过程中添加适当浓度的糖能提高卵母细胞成熟率及体外受精胚胎发育能力。 相似文献