共查询到19条相似文献，搜索用时 129 毫秒
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山羊除精浆冷冻精液的研究进展 总被引：8，自引：0，他引：8
山羊精浆中含有卵黄凝结酶等物质，对冷冻精液品质造成不良影响，应用离心处理等方法除去精浆后，可明显提高解冻后精子的品质。文章综述了这一领域的研究近况，并对其予以展望。 相似文献
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本试验旨在研究不同精液品质特征长白公猪血清和精浆中元素含量的差异,分析血清和精浆中元素含量对精液品质的影响。基于107头长白公猪的1402次精液品质记录,将公猪群按照精液可利用率划分为3组:低利用率组(利用率<60%,n=21)、中等利用率组(60%≤利用率≤80%,n=27)和高利用率组(利用率>80%,n=59)。采集每头长白公猪的血清和精浆样品,采用电感耦合等离子体质谱法检测血清和精浆中营养元素和毒性元素含量。结果表明:1)低利用率组长白公猪的有效精子数和精子活力显著低于中等利用率和高利用率组(P<0.01),精子畸形率显著高于中等利用率和高利用率组(P<0.01)。2)不同利用率组间长白公猪的血清和精浆元素含量无显著差异(P>0.05);但在血清和精浆元素含量与精液品质参数相关性分析中发现,精浆铅元素含量与精子活力呈显著负相关(P<0.05),与精子畸形率呈显著正相关(P<0.05)。3)对精浆铅含量分组进一步分析发现,精浆铅含量为0μg/L时长白公猪的精子畸形率显著低于精浆铅含量>10.0μg/L时(P<0.05),精子畸形率降低约6.11%。总的来说,长白公猪精浆中毒性元素铅的存在会通过损害精子活力和形态,影响公猪精液品质。 相似文献
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冷冻精液就是使精子在超低温（－１９６℃）下半永久性保存精子生存能力的一种技术。自从英国人Ｐｏｌｇｅ等将甘油用于冷冻保存牛精液取得成功以来的５０年里，该技术研究与应用取得了飞速的发展，尤其在乳牛上的应用效果已同鲜精无明显差异。然而近年来的研究发现精浆中亦同时存在着许多尚未被人类所了解清楚的蛋白质成分。这些物质对精子，尤其是冷冻后精子的品质有十分不利的作用。因此国外畜牧工作者已相继在牛、羊、马、猪等畜种上开展了去除精浆对冻后精子品质影响的研究，获得了良好效果。但国内尚未见此方面的系统报道，因此本文将… 相似文献
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为了研究精浆含量对绒山羊精液低温保存效果的影响,试验以低倍稀释(1∶2)为对照组,研究以高倍稀释(1∶10,高倍稀释组)和离心洗涤(洗涤组)两种方式去除精浆后的精子保存效果,再人为添加不同浓度精浆(0、10%、20%,30%、40%)于低温保存稀释液中,测定精子活率、运动速率、顶体完整性、质膜完整性及线粒体活性等精液品质指标。结果表明:高倍稀释组在各时间段内的精子活率、运动速率[直线速率(VSL)、曲线速率(VCL)及平均路径速率(VAP)]、质膜完整率均显著高于对照组和洗涤组(P0.05);高倍稀释组的精子顶体完整率和线粒体活性与对照组和洗涤组相比无显著差异(P0.05);在外源添加不同浓度精浆的试验中,10%、20%精浆组的精子活率、质膜完整率及运动速率均显著高于其他组(P0.05),而10%、20%精浆组之间无显著差异(P0.05),但20%精浆组的各项精子质量指标略高于10%精浆组。说明在低温保存山羊精液时存在一定浓度的精浆可以有效提高保存效果,在本试验条件下10%～20%的精浆添加量比较适宜,但20%精浆组的保存效果相对更好。 相似文献
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精子功能相关精浆蛋白质的蛋白组学研究进展 总被引：1，自引：1，他引：0
精浆蛋白质对生殖过程中的精子功能有显著影响,包括顶体反应、精子获能、精子贮存、精子竞争和受精。精浆蛋白质的研究已有很长的历史,而且牛精浆蛋白、热休克蛋白、富含半胱氨酸分泌蛋白等几种主要的精浆蛋白质已被成功分离鉴定。蛋白质组学研究方法和技术的迅速发展,为全面解析精浆蛋白质组提供了新的研究策略,提高了研究者探索精浆蛋白质未知领域的效率。作者综述了精子功能相关精浆蛋白质研究的相关信息及近年来精浆蛋白质组的研究进展,从蛋白质水平上阐述了精浆蛋白质与精子获能、贮存及受精等功能的关系。 相似文献
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除去精浆对波尔山羊冷冻精液品质的影响 总被引：2，自引：0，他引：2
以波尔山羊精液为实验材料,采用二步稀释法在降温前以葡萄糖-卵黄液为洗涤液,应用离心洗涤法对波尔山羊精液进行1000r/min离心处理,制作细管冻精,并进行超微结构分析.结果表明:经离心处理的冻精精子活率极显著优于对照组(P<0.01),精子顶体完整率极显著高于对照组(P<0.01) ,精子存活时间不同处理间未见显著差异(P>0.05).精浆中包含有多种物质,充当精子载体的作用,并可稀释精子,为精子提供代谢物质.试验中除去精浆后精子活率、 顶体完整率均优于对照组,表明除去精浆对冷冻后的精子品质有提高作用. 相似文献
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Eiichi KAWAKAMI Masanori KOBAYASHI Tatsuya HORI Takeharu KANEDA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(12):1711-1714
Four dogs with poor semen quality, low seminal plasma superoxide dismutase (SOD) activity
and low blood plasma testosterone (T) levels were orally administered one vitamin E tablet
containing 50 mg α-tocopheryl acetate per dog daily for 4 weeks. The mean values of semen
quality were temporarily improved after the start of vitamin E treatment and the values of
4, and 5 weeks after that were significantly different from those before the treatment
(P<0.05–0.001). The mean blood plasma T and seminal plasma SOD
activity values slightly increased in the 4 dogs after the treatment. The results of the
present study indicate that poor semen quality in dogs with low seminal plasma SOD can be
improved by vitamin E treatment. 相似文献
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Alghamdi AS Troedsson MH Xue JL Crabo BG 《American journal of veterinary research》2002,63(6):880-885
OBJECTIVE: To compare the effect of semen extender and seminal plasma on postthaw motility and filtration through a glass wool-Sephadex (GWS) filter for frozen stallion semen. SAMPLE POPULATION: 7 stallions from which we collected > or = 3 ejaculates/stallion. PROCEDURES: 4 experiments were conducted to evaluate postthaw quality of frozen stallion semen. Kenney extender was compared with glucose-EDTA extender by use of various dilution rates that resulted in differing concentrations of seminal plasma. Stallions known to produce semen with poor postthaw quality were used to investigate whether a particular extender or dilution rate could improve ability of such semen to survive freeze-thaw procedures. RESULTS: Use of Kenney extender as the centrifugation extender significantly improved postthaw motility and GWS filtration, compared with glucose-EDTA. Extending semen at a dilution of 1:3 was significantly better than 1:1 for both motility and GWS filtration. In addition, including seminal plasma at a concentration of 5% in the cryopreserved semen resulted in significantly higher yield of spermatozoa after GWS filtration, compared with complete removal of SP or use of seminal plasma at 25%. Lastly, semen with poor postthaw quality had significantly improved postthaw quality in regard to motility and GWS filtration when semen was frozen with seminal plasma at a concentration of 5%, compared with semen frozen with seminal plasma at a concentration of 25%. CONCLUSIONS AND CLINICAL RELEVANCE: Use of Kenney extender at a high dilution (> or = 1:3) immediately after collection of semen can improve postthaw quality of frozen stallion semen. 相似文献
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Effect of Seminal Plasma on Post‐Thaw Quality and Functionality of Corriedale Ram Sperm Obtained by Electroejaculation and Artificial Vagina 
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下载免费PDF全文 A Ledesma J Manes G Ríos J Aller A Cesari R Alberio F Hozbor 《Reproduction in domestic animals》2015,50(3):386-392
We have already shown that seminal collection method affects seminal plasma composition and sperm quality in Corriedale rams. In this study, we evaluated the effect of seminal plasma collected by electroejaculation or artificial vagina on sperm resistance to cryodamage. Seminal plasma of five rams of the Corriedale breed collected by artificial vagina or electroejaculation was added before freezing to sperm cells collected by the two methods, and post‐thaw quality parameters were evaluated. We found that seminal plasma has no effect on sperm resistance to cryodamage. However, we observed significantly higher percentages of sperm with intact and functional plasma membrane, intact acrosome and greater fertilizing potential after thawing in samples obtained by electroejaculation. This study demonstrates that sperm collected by electroejaculation are more resistant to damage caused by cryopreservation than those collected by artificial vagina. 相似文献
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I Barrier‐Battut C Bonnet A Giraudo C Dubois M Caillaud M Vidament 《Reproduction in domestic animals》2013,48(1):64-71
Fertility is reduced after semen cooling for a considerable number of stallions. The main hypotheses include alterations in plasma membrane following cooling and deleterious influence of seminal plasma. However, interindividual variability is controversial. We hypothesized that the removal of seminal plasma could enhance motility in some ‘poor cooler’ stallions, but could also affect, negatively or positively, membrane quality in some stallions. This study examined the effect of centrifugation, followed or not by removal of seminal plasma, on parameters indicating semen quality after 48 h at 4°C: motility, plasma membrane integrity as evaluated by hypo‐osmotic swelling test, acrosome integrity and response to a pharmacological induction of acrosome reaction using ionophore A23187. Sixty‐six ejaculates from 14 stallions were used, including stallions showing high or low sperm motility after cooled storage. Centrifugation without removal of seminal plasma did not affect sperm parameters. Removal of seminal plasma did not affect motility, but significantly stabilized sperm membranes, as demonstrated by a higher response to the osmotic challenge, and a reduced reactivity of the acrosome. Moreover, for the same semen sample, the response to an induction of acrosome reaction was significantly higher when the induction was performed in the presence of seminal plasma, compared with the induction in the absence of seminal plasma. This was observed both for fresh and cooled semen. When the induction of acrosome reaction with ionophore A23187 is used to evaluate sperm quality, care must therefore be taken to standardize the proportion of seminal plasma between samples. For the 10 stallions serving at least 25 mares, the only variable significantly correlated with fertility was motility. The influence of membrane stabilization regarding fertility requires further investigations. 相似文献
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Growing male Wistar rats were used to test in which way variations in the quality of dietary proteins (10% absorbable crude protein; casein supplemented with 4% methionine (K); casein/gelatine (1 : 3); maize gluten supplemented with 4 amino acids; and maize gluten) influenced the binding capacity of blood plasma for corticosterone, and the concentration of corticosteroid-binding globulin ("CBG"), total corticosterone, free corticosterone and albumin-bound corticosterone in blood plasma. The binding capacity of the blood plasma for corticosterone and the total concentration of corticosterone, CBG, free corticosterone and albumin-bound corticosterone were found to rise with the improving quality of the dietary proteins (r = 0.830). A close correlation was found to exist between the concentration of total corticosterone in the blood plasma and CBG. Increases in the total concentration of corticosterone in blood plasma are, in 84% of all cases, brought about by increases in CBG concentrations. In conclusion, reference is made to the significance which such results may have for the control of regulatory processes. 相似文献
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脂肪细胞膜免疫对动物体脂含量的调控 总被引：1，自引：0，他引：1
降低动物体内脂肪含量,改善畜产品质量一直是动物研究人员研究的重点。近年发展起来的脂肪细胞膜免疫为降低动物体脂含量提供了一种安全而有效的方法。本文简要介绍了脂肪细胞膜免疫的两种免疫方法,并对其发展前景进行了展望。 相似文献
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Human chorionic gonadotropin (hCG) is a glycoprotein used in the treatment of spermatogenic dysfunction. However, previous studies performed in dogs show that repeated administration of large doses of hCG produces antibodies against hCG. In this study, we examined the efficacy of low‐dose injections of hCG in four male dogs with spermatogenic dysfunction and low plasma testosterone (T) levels. We administered 100 IU hCG per animal, five times at 3‐day intervals, and evaluated the changes in semen quality and plasma T levels. The total number of sperm in ejaculate, the percentage of progressively motile sperm and the plasma T levels had increased by 3–5 weeks after the first injection of hCG in three of the four dogs, but were unchanged in the fourth dog. These findings indicate that temporary improvement of the semen quality of dogs with spermatogenic dysfunction and low plasma T levels is possible after five low‐dose injections of hCG. 相似文献
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A study was undertaken to compare the effect on fertility in the fowl of aqueous medium, natural homologous seminal plasma, heterologous turkey seminal plasma and whole turkey semen when whole fowl semen was excessively diluted with these media and inseminated fresh. High dilution with fowl seminal plasma resulted in the best fertility. Dilution with the turkey semen components produced fertility no different from that with aqueous diluent when the dose of spermatozoa was 5 X 5 or 10 X 10(6). The results of this study confirm that 5 X 5 to 10 X 10(6) good quality spermatozoa are sufficient to produce acceptable fertility in weekly inseminations of fresh semen. This enables good quality semen to be highly diluted. However, at high dilution rates there is a need to reconsider the composition of semen diluents, with respect to simulating as yet unknown properties provided by factor(s) in homologous ductus deferens seminal plasma. 相似文献