共查询到20条相似文献，搜索用时 156 毫秒
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研究表明颗粒细胞凋亡是卵泡闭锁的重要原因,调控颗粒细胞凋亡的因素是多种的,而生殖激素如生长激素、抑制素、活化素、卵泡抑素等间接地和直接地对卵巢卵泡颗粒细胞凋亡发挥重要的综合调控作用,这些激素通过多种信号转导途径调节颗粒细胞的凋亡,成为卵泡的存活因子和死亡因子.这些途径相互交联,构成信号网络,与卵巢的旁分泌、内分泌、自分泌途径一起参与卵泡闭锁和颗粒细胞的凋亡. 相似文献
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与哺乳动物不同,家禽的卵泡发育无明显发情周期,其卵泡发育遵循严格的等级发育体系。禽类卵泡的等级发育是一个复杂的调节过程,受卵泡细胞内外的内分泌激素、自分泌/旁分泌因子的共同调节。促卵泡刺激素(Follicle stimulating hormone,FSH)和促黄体激素(Luteinizing hormone,LH)在调控卵泡发育、卵母细胞成熟和排卵中起着重要的作用。此外,局部产生的生长因子如转化生长因子β超家族(Transforming growth factor superfamily,TGF-β)成员,包括抗缪勒氏激素(Anti-Müllerian hormone,AMH)、骨形态蛋白家族(Bone morphogenetic proteins,BMPs)、抑制素(Inhibin)和激活素(Activin)等,与促性腺激素一起协同调控卵泡的生长发育、卵母细胞的成熟等过程。文章综述了TGF-β家族成员,包括AMH、BMPs、抑制素、激活素在家禽卵泡发育中的作用及其未来的研究方向。 相似文献
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抑制素-激活素-卵泡抑素轴系统在动物繁殖生理中的作用日益突出,它参与调节下丘脑-垂体-卵巢轴系统,调节腺垂体FSH的分泌和合成;并可作为自分泌或旁分泌因子调节卵泡的发育和成熟.本综述着重阐述INH、ACT在雌性动物生殖调控、卵泡发育中的作用及其在生产中的应用. 相似文献
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《中国草食动物科学》2017,(2)
动物精子通过多次复杂的细胞分化最终形成精子,此过程受许多因素的调控,其中起着决定性作用的是生精细胞内的激素调控。文章对动物精子发生调控的相关激素,如促卵泡激素、促黄体生成素、抑制素、褪黑素的研究进展进行了综述,并对动物精子发生调控激素的研究进展进行了展望,以期为研究者提供一定参考。 相似文献
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实验以高繁殖力的大足黑山羊和繁殖力较低的萨能奶山羊为研究对象,比较2个山羊品种在一个发情周期内血浆中抑制素B(INHB)、活化素A(ACTA)和促卵泡激素(FSH)的分泌变化规律,旨在研究这3种激素与山羊繁殖力之间的关系。结果表明:大足黑山羊和萨能奶山羊血浆中FSH的分泌与ACTA呈正相关(P<0.01,P=0.361),与INHB呈负相关(P=0.022,P=0.005),大足黑山羊在整个发情周期内血浆中FSH、ACTA平均浓度略高于萨能奶山羊(P>0.05),而INHB平均浓度显著低于萨能奶山羊(P<0.05)。从发情征状明显至排卵前这段时间内,大足黑山羊血浆中FSH平均浓度显著高于萨能奶山羊(P<0.05)。结果提示,大足黑山羊卵泡期比萨能奶山羊长,发情周期内INHB与FSH的差异可能是导致大足黑山羊和萨能奶山羊繁殖力差异的根本原因之一。 相似文献
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The objectives of two studies were to determine 1) whether plasma concentrations of inhibin (INH) changed with age in prepubertal bulls and whether these changes were related to changes in FSH, testosterone or testis length; and 2) whether castration and(or) estradiol implants affected plasma concentrations of INH and FSH. In Exp. 1, plasma INH remained constant from 4 until 8 wk of age then increased from 120 pM to 202 pM between 8 and 12 wk. Thereafter, INH decreased to 90 pM by 36 wk. Between 4 and 10 wk, plasma FSH increased from .32 to .43 ng/ml, apparently increasing before the initial rise in plasma INH. Between 10 and 12 wk, FSH declined from .43 to .33 ng/ml. After 12 wk, FSH increased as INH decreased. Initial increases in testis length and concentrations of plasma testosterone occurred at 14 wk coincident with the second rise in FSH. In Exp. 2, bull calves were either left intact, castrated, castrated and implanted with estradiol, or left intact and implanted with estradiol at 7.5 wk of age. Castration decreased concentrations of INH and increased concentrations of FSH. Castrated calves implanted with estradiol had decreased concentrations of both INH and FSH. Intact bulls implanted with estradiol had decreased concentrations of FSH relative to intact unimplanted bulls; however, concentrations of INH did not display the age-related changes observed in intact, unimplanted bulls. In summary, age-related changes in plasma INH and FSH occur in bulls. Furthermore, plasma concentrations of INH and FSH increased before changes in gonadal size were detected. The bovine testis may be a major source of circulating INH because castration decreased concentrations of plasma INH. 相似文献
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为了研究抑制素α（INHα）主动和被动免疫对哈萨克羊生殖激素含量的影响，本试验在对抑制素α重组质粒表达菌株进行诱导表达的基础上，将经纯化、鉴定的抑制素α重组蛋白免疫接种新疆双峰骆驼，制备驼抗抑制素α多克隆抗体，并对其进行纯化，检测抗体效价，验证抗体的特异性。之后选择3~5岁、发情时间相近并处于间情期的45只成年哈萨克羊随机分为3组，分别作为抑制素α多克隆抗体免疫组（A组）、抑制素α重组蛋白免疫组（B组）及对照组（C组），每隔10 d连续进行3次加强免疫，应用ELISA法检测在绵羊繁殖活动中具有重要功能的5种生殖激素：促卵泡素（FSH）、促黄体素（LH）、孕酮素（P4）、雌激素（E2）、抑制素（INH），并检测血液生化指标。结果显示，IPTG的最佳诱导浓度是0.6 mmol/L，在4 h时诱导出产量较高的抑制素α包涵体蛋白，纯化后的抑制素α重组蛋白纯度较高，并具有较好的免疫原性，经进一步验证发现，制备的抑制素α抗体效价为1：512 000，该抗体可与抑制素α重组蛋白特异性结合。说明成功制备了具有免疫原性的抑制素α重组蛋白和高效价的驼抗抑制素α多克隆抗体。免疫后A组LH、P4含量和B组FSH、LH、P4、E2、INH含量与C组相比差异不显著（P>0.05），而A组FSH含量和E2含量显著高于C组（P<0.05），INH含量显著低于C组（P<0.05）。通过血液生化指标检测发现，抑制素α蛋白和抑制素α抗血清两种免疫制剂免疫后，试验动物均没有出现不良症状。说明两种抑制素α抗原均可对哈萨克羊血液生殖激素的分泌产生良好效果，相比之下抑制素α抗血清免疫效果更佳。 相似文献
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Katayama T Nakashima M Kyan H Murakami N Kuroda H 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2000,62(7):731-736
Pituitary folliculo-stellate (FS) cells were able to modify the effect of activin-A on gonadotropes through the paracrine factor, follistatin. The present study was aimed to examine whether a hypothalamic peptide, pituitary adenylate cyclase activating polypeptide (PACAP), could be a regulator of this paracrine interaction. Co-culture of FS cell-originated cell line TtT/GF cells with rat anterior pituitary cells showed faint inhibitory effect on the stimulatory action of activin-A on FSH secretion. When PACAP was added to the culture during the co-culture period, however, the presence of TtT/GF cells caused significant suppression of the effect of activin-A on FSH secretion. Conditioned-media (CM) from TtT/GF cells, obtained by incubation of TtT/GF cells in the presence or absence of PACAP, were next added to the cultures of anterior pituitary cells alone. CM from TtT/GF cells without PACAP treatment revealed slight, but not significant, suppressive effect on activin-induced increases in FSH secretion and the percentage of FSH cells. Meanwhile, CM from PACAP-treated TtT/GF cells attenuated both effects of activin-A. Furthermore, the inhibitory effect of the CM was neutralized when follistatin antibody was present in the culture. These results suggest that PACAP is able to regulate the paracrine action of FS cells on pituitary gonadotropes. Besides expressing direct actions on pituitary endocrine cells, PACAP may have roles as a regulator of cell-to-cell interactions within the pituitary gland. 相似文献
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GnIH与INH表位多肽疫苗主动免疫对甘肃高山细毛羊生殖激素的影响 总被引：1，自引：0，他引：1
本试验通过合成促性腺激素类的抑制激素——抑制素(inhibit hormone,INH)与促性腺激素抑制激素(gonadotropin inhibiting hormone,GnIH)的INH表位多肽疫苗和GnIH表位多肽疫苗,主动免疫甘肃高山细毛羊并对促卵泡素(follicle stimulating hormone,FSH)和促黄体素(luteinizing hormone,LH)激素水平进行比较分析。试验选用15只处在非发情季节的3.5岁的甘肃高山细毛羊,注射INH表位多肽疫苗与GnIH表位多肽疫苗分别为表位多肽疫苗A组和表位多肽疫苗B组,对照组注射等量生理盐水。采血后进行免疫,每隔7 d免疫和采血,同时在发情后每隔15 min采集一次血液,分离血清,用ELISA试剂盒检测抗体水平及FSH和LH激素变化。结果表明,表位多肽疫苗A组和表位多肽疫苗B组在初次免疫后都产生了相应的抗体,且表位多肽疫苗B组较表位多肽疫苗A组产生的抗体浓度高,75 、90、105 min时,表位多肽疫苗B组相对表位多肽疫苗A组显著促进了FSH的分泌水平(P<0.05)。在45~105 min时,表位多肽疫苗B组相对表位多肽疫苗A组显著促进了LH的分泌水平(P<0.05),且在90到105 min时表位多肽疫苗A组和表位多肽疫苗B组血清中FSH和LH的水平均显著高于对照组(P<0.05)。本试验结果表明,INH表位多肽疫苗和GnIH表位多肽疫苗主动免疫促进了甘肃高山细毛羊的FSH、LH的分泌,GnIH表位多肽疫苗在甘肃高山细毛羊上具有更好的免疫作用,本研究为该表位多肽疫苗在绵羊上的运用奠定了基础。 相似文献
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ZHANG Ling-ling YANG Bo-hui YUE Yao-jing GUO Ting-ting LIU Jian-bin YUAN Chao NIU Chun-e FENG Rui-lin GUO Jian SUN Xiao-ping LIU Shan-bo 《中国畜牧兽医》2016,43(4):1039-1044
This study aimed to detect the reproductive hormones levels of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in Gansu Alpine Fine-wool sheep by active immunization of two synthesized epitope peptide vaccines A and B which were combined inhibit hormone (INH) and gonadotropin inhibit hormone (GnIH).15 Gansu Alpine Fine-wool sheep were selected which were 3.5 year old and lived in anoestrus season, 3 groups each had 5 sheep, GnIH epitope peptide vaccine and INH epitope peptide vaccine were named epitope peptide vaccine A and B groups, while blank group was injected with saline.The blood was collected before immunization and immuned, and bloods were collected once every 7 days, meanwhile collected blood every 15 min after estrus.The serum was used to detect antibody, FSH and LH levels by ELISA Kits.The results showed that the epitope peptide vaccine A and B groups produced the corresponding antibodies after the initial immunization, and epitope peptide vaccine B group produced more antibodies than epitope peptide vaccine A group.Epitope peptide vaccine B group promoted the FSH secretion levels was significantly higher than epitope peptide vaccine A group in 75, 90 and 105 min (P<0.05);In 45 to 105 minutes, the LH secretion levels of epitope peptide vaccine B group was significantly higher than epitope peptide vaccine A group (P<0.05), while the LH and FSH levels in epitope peptide vaccine A and B groups were significantly higher than control group (P<0.05).This study indicated that the epitope peptide vaccine A and B groups could promote the FSH and LH secretion levels through active immunity in Gansu Alpine Fine-wool sheep and had a good immune function.This study laid a foundation for the application of epitope peptide vaccine on sheep. 相似文献
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为了探索FSH剂量和不同超排处理方法对无角陶赛特羊超数排卵的效果,分别用总剂量为120 IU、180 IU、240 IU和300 IU四个剂量水平的FSH进行超数排卵.结果表明：240 IU的FSH对无角陶赛特羊的超排效果最好,回收胚胎数和可用胚胎数显著高于120 IU（P≤0.05）,同时效果也明显优于120 IU和180 IU剂量组;两种超排方案FSH＋PG和CIDR＋FSH进行超数排卵对无角陶赛特羊排卵数、回收胚胎数以及可用胚胎数之间无显著差异（P＞0.05）. 相似文献