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1.
牛体外受精胚冷冻保存的研究 总被引：9，自引：0，他引：9
对牛卵泡卵母细胞体外受精（ＩＶＦ）１６８ｈ的致密桑椹胚、囊胚用常规快速冷冻法、预冷和不预冷的超快速冷冻法进行了冷冻保存试验。结果表明：ＩＶＦ囊胚采用含１０％甘油的常规快速冷冻法、含２．１ｍｏｌ／Ｌ甘油和０．２５ｍｏｌ／Ｌ蔗糖预冷５ｍｉｎ的一步冷冻法及含２５％甘油和２５％乙二醇预冷５ｍｉｎ的玻璃化冷冻法等３种方法进行冷冻保存，解冻后的继续发育率（６８．０％，５９．０％，６５．７％）均无显著差异（Ｐ＞０．０５），可用快速、简便、预冷的一步冷冻法或玻璃化冷冻法替代常规快速冷冻法；ＩＶＦ致密桑椹胚可用一步冷冻法（２．１ｍｏｌ／Ｌ甘油＋０．２５ｍｏｌ／Ｌ蔗糖）和玻璃化冷冻法（２５％甘油＋２５％乙二醇或２５％甘油＋２５％１，２－丙二醇）进行预冷的超快速冷冻保存；冻前预冷（５ｍｉｎ）能显著提高ＩＶＦ囊胚的冻后形态正常率和继续发育率（Ｐ＜０．０５）；ＩＶＦ囊胚冷冻—解冻后的继续发育率高于ＩＶＦ致密桑椹胚。 相似文献
2.
小鼠桑椹胚简易玻璃化冷冻技术再探讨 总被引：12，自引：0，他引：12
本试验继小鼠扩张囊胚玻璃化冷冻保存成功后，在室温（２５℃）下利用不同浓度的ＥＦＳ玻璃化溶液，对小鼠的桑椹胚简易玻璃化冷冻技术进行再探讨。结果是胚胎在１０％ＥＧ溶液中预先处理５分钟，再移入事先配置好含有ＥＦＳ３０的０．２５ｍｌ塑料细管中１分钟平衡后直接投入液氮中冷冻，解冻后获得的发育率最高（９４％）。冻胚移植后妊娠率和产仔率分别为５６％（９／１６）及４２％（４９／１１６）。与对照组相比差异不显著（Ｐ＞０．０５） 相似文献
3.
影响玻璃化冷冻兔胚胎效果的一些因素 总被引：4，自引：0，他引：4
试验对影响玻璃化冷冻兔胚胎效果的一些因素进行探讨，以找出理想的玻璃化冷冻方法。在测试的５种玻璃化溶液中，含３５％乙二醇（ＥＧ）和１．０ｍｏｌ／Ｌ蔗糖的溶液（ＶＳ１）对胚胎的毒性最小。用ＶＳ１冷冻桑椹胚和囊胚的理想程序是：在室温下使胚胎分别在２０％ＥＧ和３５％ＥＧ中平衡２、３分钟后，移入ＶＳ１中，０．５分钟内（囊胚也可在２分钟后）投入液氮中冷冻。桑椹胚的存活率为９１．７％（３３／３６），囊胚的存活率为９７．１％（３３／３４）～９７．３％（３６／３７）。８～１６细胞胚胎的理想冷冻程序为：在室温下使胚胎在２０％ＥＧ、３５％ＥＧ中平衡２、３分钟，移入４℃的３７％ＥＧ＋１．０ｍｏｌ／Ｌ蔗糖溶液中平衡２分或１０分钟后冷冻，胚胎存活率分别为１００％（３７／３７）、８６．１％（３１／３６）。 相似文献
4.
家兔扩张囊胚玻璃化冷冻保存技术的研究 总被引：16，自引：0，他引：16
本试验对家兔扩张囊胚的玻璃化冷冻保存技术进行了探讨。首先在２０℃室温下，将扩张囊胚直接移入ＥＦＳ４０溶液中短时间平衡后，直接投入液氮中冷冻保存（一步法）；或胚胎在１０％～２０％ＥＧ（或ＥＦＳ２０）溶液中经预先处理后，再移入ＥＦＳ４０中冷冻保存（二步法），解冻后的胚胎发育率达到９５％～１００％。当室温提高到２５℃时，一步法和二步法冷冻的胚胎均得到了较高的发育率（８９％～９０％）。利用２０℃条件下一步法即２分钟平衡后冷冻的胚胎移植后，妊娠受体的产仔率为２９．２％（７／２４），同对照组产仔率３２．４％（１１／３４）相比无显著性差异（Ｐ＞０．０５）。 相似文献
5.
绒山羊超数排卵和胚胎冷冻技术的初步研究 总被引：10，自引：0，他引：10
为了建立适合于绒山羊的超数排卵方法和胚胎冷冻程序，为开发绒山羊胚胎移植技术奠定物质基础，使用两种ＦＳＨ制剂（宁波生物制剂厂生产的ＦＳＨ和中科院动物所生产的ＦＳＨ）对３７只供体羊进行了超排处理，每种制剂使用两种不同剂量。超排结果如下：每组供体平均排卵数分别为９．５０±４．４４（１３８ＩＵ），１２．４０±５．１８（１５０ＩＵ）和８．１４±３．９８（２．４ｍｇ），１１．２９±１．８７（２．７ｍｇ）。每组可用胚胎数分别为７．５０±４．２１（１３８ＩＵ），７．８０±１．３２（１５０ＩＵ），４．２９±３．５４（２．４ｍｇ），５．５９±４．５４（２．７ｍｇ）。宁波产ＦＳＨ对绒山羊的超排效果好于中科院产ＦＳＨ。共冷冻１０７枚胚胎，其中孵化囊胚３１枚、紧缩桑椹胚至扩张囊胚期胚胎７６枚。解冻６３枚胚胎进行了移植，包括１８枚孵化囊胚和４５枚有透明带的胚胎。解冻胚胎的存活率分别为３３．３％（孵化囊胚）和８４．４４％（其它胚胎）。移植妊娠率分别为５０．００％（孵化囊胚）和５９．２６％（其它胚胎）。这说明绒山羊胚胎移植技术是一项具有较大经济潜力的实用技术，通过对各个技术环节进一步改进，可以进行产业化开发。 相似文献
6.
本文研究了小鼠胚胎快速冷冻方法,以ＰＢＳ＋２．０Ｍ甘油＋０．５Ｍ蔗糖为冷冻液,以ＰＢＳ＋０．５Ｍ蔗糖为称释液。结果桑椹胚冷冻解冻后的存活率为６９．３％,早期囊胚冷冻解冻后的存活率为６０．４％,二者之间无显著差异。 相似文献
7.
BFF,rbGH对牛卵泡卵母细胞体外受精后发育的影响 总被引：12，自引：3，他引：9
利用屠宰黄牛卵巢，对２～５ｍｍ卵泡卵母细胞的体外成熟（ＩＶＭ）、体外受精（ＩＶＦ）、受精卵的体外培养（ＩＶＣ）进行了系列研究。结果表明，在成熟培养液中单独添加１０％Ｄ０ＥＣＳ（发情当天牛血清）获得了卵泡卵母细胞受精后较高的卵裂率（６４．７％）、桑椹胚发育率（３９．９％）和囊胚发育率（２４．８％），说明在成熟培养液中单独添加Ｄ０ＥＣＳ是可行的；在含１０％Ｄ０ＥＣＳ的成熟培养液中再添加１０％或２０％ＢＦＦ（牛卵泡液），均能提高受精卵的卵裂率以及桑椹胚和囊胚的发育率，以添加２０％ＢＦＦ效果较好，其囊胚发育率（３５．０％）显著高于对照组（２４．８％，Ｐ＜０．０５）；在卵泡卵母细胞成熟培养系统和受精卵共同培养系统中添加１０μｇ／Ｌ重组牛生长因子（ｒｂＧＨ），虽对体外受精卵的卵裂率无显著影响（Ｐ＞０．０５），但能显著提高卵裂胚的囊胚发育率（Ｐ＜０．０５） 相似文献
8.
对从澳大利亚进口的304枚德克赛尔肉羊冷冻胚胎进行移植，产羔178只，产羔率为58.55%，并对冷冻胚胎解冻，移植过程中的主要环节进行研究。其结果如下：（1）解冻后的A、B级孵化囊胚所占比例为（43.75%)，桑椹胚-扩张囊胚解冻后的A、B级胚胎所占比例为（84.02%)，两者有显著差异；（2）解冻后的A、B级桑椹胚-扩张囊胚移植产羔率（64.88%)显著高于解冻后的A、B级孵化囊胚移植产羔率（42.85%)；解冻后的C级胚胎移植后也能得到一定的产羔率；（3）经产母羊胚胎移植产羔率（68.62%)，显著高于育成母羊产羔率（51.85%)。 相似文献
9.
扩张囊胚玻璃化超低温冷冻保存及移植技术的研究 总被引：8，自引：0，他引：8
本试验探讨了对鼠扩张囊胚玻璃化冷冻保存后，提高发育率的最佳条件。玻璃化溶液是用ＰＢＳ液稀释成的３０％聚蔗糖＋０．５Ｍ蔗糖混合法，再将乙二醇（ＥＧ）调制成２０、３０及４０％（ｖ／ｖ）的溶液，即ＥＦＳ２０、３０及４０。玻璃化冷冻保存是１０、２０及２５℃温度下，将扩张囊胚直接移入ＥＰＳ溶液后投入液氮中一步法令冻保存，其中２５℃下保存后的发育率最高（８７％）。继之将扩张囊胚用１０％ＥＧ溶液经５分钟处理后，再移入ＥＦＳ４０中二步法冷冻保存，发育率高达９４％。利用二步法冷冻保存的扩张囊胚移植后，妊娠受体的产仔率为６６％（１６８／２５５），同时照组产仔率６１％（８０／１３２）相比无显著性差异（Ｐ＞０．０５）。 相似文献
10.
采用常规冷冻法冷冻保存圭山山羊桑椹胚、囊胚、扩张囊胚期胚胎,解冻后体外发育率分别为41.94%、67.50%、84.09%,桑椹胚与囊胚、扩张囊胚间差异显著(P<0.05),囊胚和扩张囊胚间虽无显著性差异(P>0.05),但扩张囊胚体外发育率高于囊胚.在胚胎的冷冻-解冻过程中,桑椹胚、囊胚、扩张囊胚的透明带受损伤率分别为6.45%、20.00%、31.82%,透明带受损的桑椹胚、囊胚、扩张囊胚体外发育率分别为0%、50.00%、78.57%.初步说明发育程度越高的胚胎,在冷冻-解冻过程中其透明带越易受到损伤,但随发育程度的加深,胚胎生长发育时对透明带的依赖程度也变得越来越弱,表明圭山山羊早期扩张囊胚最适宜进行冷冻保存. 相似文献
11.
Q-H Hong S-J Tian S-E Zhu J-Z Feng C-L Yan X-M Zhao G-S Liu S-M Zheng 《Reproduction in domestic animals》2007,42(1):34-38
The aim of this study was to investigate the effects of different vitrification solutions [EFS30 or EFS40 contains 30% (v/v) ethylene glycol (EG), 40% (v/v) EG; EDFS30 or EDFS40 contains 15% (v/v) EG and 15% (v/v) dimethyl sulfoxide (DMSO), 20% (v/v) EG and 20% (v/v) DMSO], equilibrium time during vitrification (0.5-2.5 min) and vitrification protocols [one-step straw, two-step straw and open-pulled straw (OPS)] on in vivo development of vitrified Boer goat morulae and blastocysts after embryo transfer. In the one-step straw method, the lambing rates of vitrified embryos in EFS30 (37.5%), EFS40 (40.5%) or EDFS30 (38.2%) group were similar to that of fresh embryos (57.5%) and conventional freezing method (46.7%) when the equilibrium time was 2 min. In the two-step straw method, the highest lambing rate was obtained when embryos were pretreated with 10% EG for 5 min and then exposed to EFS40 for 2 min (51.4%), showing similar lambing rates compared with fresh embryos (56.1%) or the embryos cryopreserved by conventional freezing method (45.2%). In the OPS method, the lambing rate in EFS40, EDFS30 or EDFS40 groups were similar to that (57.1%) of fresh embryos, or to that (46.0%) of embryos cryopreserved by conventional freezing method. The highest lambing rate (51.4%) of the group of OPS was obtained when the embryos were vitrified with EDFS30. In conclusion, either the two-step straw method in which embryos were pretreated in 10% EG for 5 min and then exposed to EFS40 for 2 min, or the OPS method in which embryos were pretreated in 10% EG + 10% DMSO for 30 s and then exposed to EDFS30 for 25 s was a simple and efficient method for the vitrification of Boer goat morulae and blastocysts. 相似文献
12.
绵羊玻璃化冷冻胚胎直接移植试验研究 总被引：1，自引：0，他引：1
应用EFS40玻璃化液对6.5～7日龄的绵羊胚胎进行玻璃化冷冻及解冻后直接移植试验.结果:桑椹胚、囊胚冷冻解冻后移植的妊娠率分别为37.50%(3/8)和54.55%(6/11),胚胎存活率分别为33.33%(3/9)和50.00%(6/12),差异均不显著(P＞0.05);胚胎解冻后用0.5 mol/L蔗糖脱防冻剂与直接用胚胎存放液脱除防冻剂的妊娠率分别为44.44%(4/9)和50.00%(5/10),胚胎存活率分别为40.00%(4/10)、45.45%(5/11)差异不显著(P＞0.05);10枚解冻后的胚胎细管内脱防冻剂后,直接装管移植给8只受体,妊娠率为50.00%(4/8),胚胎成活率为40.00%(4/10),与同期常规冷冻解冻组相比无显著差异(P＞0.05). 相似文献
13.
Ushijima H Yoshioka H Esaki R Takahashi K Kuwayama M Nakane T Nagashima H 《The Journal of reproduction and development》2004,50(4):481-486
An efficient cryopreservation protocol for porcine morulae was investigated with three types of vitrification having different cooling rates (Exp. 1). Survival of embryos vitrified after removal of cytoplasmic lipid droplets was also examined by means of the minimum volume cooling (MVC) method (Exp. 2). In Exp. 1, the morula stage embryos were vitrified with a 0.25 ml plastic straw (ST-method), gel loading tip (GLT-method) and the MVC-method, respectively, and stored in liquid nitrogen after which they were warmed in sucrose solutions with cryoprotectants being subsequently removed in a stepwise manner. In Exp. 2, morulae were centrifuged with 7.5 microg/ml cytocharasin B at 12000 x g for 20 min to polarize the cytoplasmic lipid droplets that were then removed from the embryos by micromanipulation (delipation). Both those delipated at the morula stage and the intact embryos at the morula to blastocyst stages were vitrified by the MVC-method. In vitro survival of the vitrified embryos was assessed in both experiments by culturing in NCSU-23 + 10% FCS for 48 h. In vitro developments of vitrified embryos after warming to blastocysts were 20% (6/30) for the ST-method, 39% (18/46) for the GLT-method, and 60% (26/43) for the MVC-method. Embryo survival was further improved by vitrification after delipation (95%, 35/37) compared to intact vitrified morulae (24/42, 57%, P<0.001) and blastocysts (23/31, 74%, P<0.05). Moreover, the number of cells in blastocysts (92 +/- 25) derived from the delipated-vitrified morulae was comparable to those derived from intact control non-vitrified embryos (103 +/- 31). Our results demonstrate that vitrified porcine morulae have the highest survival when using the MVC-method in conjunction with delipation. 相似文献
14.
Solid surface vitrification (SSV) was compared with in-straw vitrification for cryopreservation of biopsied mouse embryos. Eight-cell stage embryos were zona drilled and one blastomere was removed. Developed morulae or blastocysts were vitrified in microdrop (35% EG + 5% PVP + 0.4 M trehalose) or in straw (7.0 M EG + 0.5 M sucrose). Following recovery, embryos were cultivated in vitro or transferred into recipients. Cryopreservation had an effect not only on the survival of biopsied embryos but also on their subsequent development in vitro. Cryosurvival of biopsied morulae vitrified in straw was significantly inferior to SSV. The post-warm development of biopsied and non-biopsied morulae was delayed on Day 3.5 and 4.5 in both vitrification groups. A delay in development was observed on Day 5.5 among vitrified non-biopsied blastocysts. The percentage of pups born from biopsied morulae or blastocysts following cryopreservation did not differ from that of the control. No significant differences could be detected between methods within and between embryonic stages in terms of birth rate. The birth rate of biopsied embryos vitrified in straw was significantly lower compared to the non-biopsied embryos. The novel cryopreservation protocol of SSV proved to be effective for cryopreservation of morula- and blastocyst-stage biopsied embryos. 相似文献
15.
16.
Juan QIU Kazutsugu MATSUKAWA Chihiro KOSHIMOTO Keisuke EDASHIGE 《The Journal of reproduction and development》2021,67(2):109
We previously developed a new vitrification method (equilibrium vitrification) by which two-cell mouse embryos can be vitrified in liquid nitrogen in a highly dehydrated/concentrated state using low concentrations of cryoprotectants. In the present study, we examined whether this method is effective for mouse embryos at multiple developmental stages. Four-cell embryos, eight-cell embryos, morulae, and blastocysts were vitrified with EDFS10/10a, 10% (v/v) ethylene glycol and 10% (v/v) DMSO in FSa solution. The FSa solution was PB1 medium containing 30% (w/v) Ficoll PM-70 plus 0.5 M sucrose. The state of dehydration/concentration was assessed by examining the survival of vitrified embryos after storage at –80°C. When four-cell embryos and eight-cell embryos were vitrified with EDFS10/10a in liquid nitrogen and then stored at –80°C, the survival rate was high, even after 28 days, with relatively high developmental ability. On the other hand, the survival of morulae and blastocysts vitrified in liquid nitrogen and stored at –80°C for four days was low. Therefore, morulae and blastocysts cannot be vitrified in a highly dehydrated/concentrated state using the same method as with two-cell embryos. However, when blastocysts were shrunken artificially before vitrification, survival was high after storage at –80°C for four days with high developmental ability. In conclusion, the equilibrium vitrification method using low concentrations of cryoprotectants, which is effective for two-cell mouse embryos, is also useful for embryos at multiple stages. This method enables the convenient transportation of vitrified embryos using dry ice. 相似文献
17.
Manjunatha BM Gupta PS Ravindra JP Devaraj M Nandi S 《Veterinary journal (London, England : 1997)》2009,179(2):287-291
This study examined the effects of different vitrification medium compositions and exposure times (2, 4 and 6min) on the post-thaw development of buffalo embryos produced in vitro (IVP). The compositions were (1) 40% ethylene glycol (EG); (2) 25% glycerol (G)+25% EG, and (3) 25% EG+25% dimethylsulfoxide (DMSO). The base medium was 25mM Hepes-buffered TCM-199+10% steer serum +50microg/mL gentamycin. The IVP embryos were cryopreserved by a two-step vitrification method at 24 degrees C. After warming, the embryos were cultured in vitro for 72h. The vitrification of morulae and blastocysts in 25% EG+25% DMSO with an exposure time of 2 and 4min, respectively, resulted in a better hatching rate than other combinations. The hatching rate of morulae vitrified in 25% EG+25% G, 25% EG+25% DMSO, and blastocysts vitrified in 40% EG, 25% EG+25% DMSO were negatively correlated with exposure time. However, the hatching rate of blastocysts vitrified in 25% EG+25% G was positively correlated with exposure time. The study demonstrated that the post-thaw in vitro development of IVP buffalo embryos was affected by the vitrification medium composition and exposure time. 相似文献
18.
Taniguchi M Ikeda A Arikawa E Wongsrikeao P Agung B Naoi H Nagai T Otoi T 《The Journal of reproduction and development》2007,53(4):963-969
In this study the efficacy of the combination of glycerol (GLY) and ethylene glycol (EG) as cryoprotectants in a vitrification method developed for direct embryo transfer was evaluated by in vitro development of in vitro fertilized (IVF) and somatic cell nuclear transfer (SCNT) embryos after vitrification. The IVF and SCNT blastocysts were vitrified in either 40% GLY, 30% GLY + 10% EG, or 20% GLY + 20% EG using French straws. After warming, the straws were held vertically for 1 min without shaking and were then placed horizontally for 5 min to dilute the cryoprotectants. After washing, the vitrified-warmed embryos were cultured in vitro for 72 h. There were no differences among the vitrification solutions with respect to the rates of vitrified-warmed IVF and SCNT embryos surviving and developing to the hatched blastocyst stage. However, the rates of development to the hatched blastocyst stage of the SCNT embryos vitrified with 40% GLY tended to be higher than those vitrified with 30% GLY + 10% EG or 20% GLY + 20% EG (26% vs. 7-8%, respectively). The development rates to the hatched blastocyst stage of the IVF and SCNT embryos vitrified with solution containing EG were significantly lower (P<0.05) than those of non-vitrified embryos. These results suggest that use of the combination of GLY and EG as cryoprotectants had no beneficial effect on the viability of embryos after in-straw dilution. However, this method is so simple that it can be used for practical direct transfer of vitrified embryos in the field. 相似文献
19.
Yan CL Yang QE Zhou GB Hou YP Zhao XM Fan ZQ Liu MQ Liu L Zhu SE 《Acta veterinaria Hungarica》2008,56(2):245-253
The present study was designed to investigate the cryotolerance of in vitro fertilised (IVF) mouse embryos at various preimplantation developmental stages. IVF mouse embryos were vitrified by the open-pulled straw (OPS) method. After warming, embryos were morphologically evaluated and assessed by their development to blastocysts, hatched blastocysts or term. The results showed that a high proportion (93.3-100.0%) of vitrified embryos at all developmental stages were morphologically normal after recovery. The developmental rate of vitrified 1-cell embryos to blastocyst (40.0%) or hatched blastocyst (32.7%) or term (9.3%) was significantly lower than that from other stages (P < 0.05). Vitrified embryos from 2-cell to early blastocyst stage showed similar blastocyst (71.8-89.5%) and hatched blastocyst rates (61.1-69.6%) and could develop to term without a significant loss of survival compared with those of fresh embryos (P > 0.05). Vitrified 2-cell embryos showed the highest survival rate in vivo (50.6%, 88/174), compared with that from other stages (9.3-30.5%, P < 0.05). The data demonstrate that the OPS method is suitable for the cryopreservation of IVF mouse embryos from 2-cell stage to early blastocyst stage without a significant loss of survival. Embryos at the 2-cell stage had the best tolerance for cryopreservation in the present study. 相似文献