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为探索番鸭等级前卵泡发育过程中主要生殖激素及卵泡发育的变化规律,试验以同批孵化、饲养条件相同、体况相近的产蛋期番鸭为对象,分别采集小白卵泡(SWF)、大白卵泡(LWF)、小黄卵泡(SYF)、大黄卵泡(LYF)。通过组织形态学方法观测卵泡的发育情况,酶联免疫吸附试验(ELISA)测定激素水平。结果表明:在等级前卵泡发育过程中,促卵泡素(FSH)和促黄体素(LH)呈现上升的趋势,且LYF时期浓度最高,差异不显著(P0.05);而孕酮(P4)和雌二醇(E2)均呈现下降趋势,从SWF至SYF时期极显著下降(P0.01),SYF至LYF时期,下降不显著(P0.05)。伴随卵泡的发育,颗粒细胞层和卵泡膜层不断增厚,且卵泡膜厚度在LWF至LYF时期增长极显著(P0.01)。由此可见,FSH、LH、P4、E2在番鸭等级前卵泡发育中起重要作用,且SYF阶段是番鸭等级前卵泡发育的关键阶段。 相似文献
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《中国家禽》2020,(10)
为探讨矮小型品系S3系和苏禽3号不同等级卵泡的膜层和颗粒层中生长分化因子9(Growth differentiation factor9,GDF9)的表达差异和表达模式,分别于24和43周龄采集两个品系母鸡的大白卵泡(Large white follicle,LWF,4～6 mm)、小黄卵泡(Small yellow follicle,SYF,6～8 mm)以及等级卵泡F_1、F_2、F_3、F_4、F_5的膜层和颗粒层,每个组织5个重复;采取荧光定量PCR法检测两个品种各级卵泡中GDF9 mRNA的表达量。结果显示:GDF9 mRNA在2个鸡种卵泡膜层和颗粒层的表达均呈"低-高-低"趋势,表达高峰在SYF期,且明显高于其他卵泡期(P0.05),在F_1和F_2期几乎不表达;同一等级卵泡的膜层和颗粒层在不同时期表达模式十分相似,均为24周龄高于43周龄(P0.05);不同品种鸡卵泡颗粒层和膜层GDF9 mRNA的表达规律为苏禽3号略高于S3系(P0.05)。研究结果提示,GDF9基因在鸡卵泡中的表达存在组织、时间及品种差异,GDF9主要影响鸡的分级前卵泡,其高表达可能对维持大量卵泡生长有重要作用。 相似文献
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卵泡FSH受体mRNA的表达及其对卵母细胞体外培养成熟率的影响 总被引：1，自引：3，他引：1
本研究采用RT-PCR技术检测了猪大、中、小卵泡颗粒细胞中FSH受体(FSHR)mRNA的表达差异,比较和分析了受体表达差异及其对卵母细胞体外成熟培养的影响。结果表明大、中、小卵泡中颗粒细胞都有FSHR mRNA表达,大卵泡的颗粒细胞与小、中卵泡的颗粒细胞FSHR mRNA相对表达量有显著差异(P<0.05),中、小卵泡的颗粒细胞FSHR mRNA相对表达量之间无显著差异(P>0.05)。不同大小卵泡卵母细胞体外成熟培养结果表明,小卵泡与大、中卵泡比较,卵丘细胞扩展率和第一极体排出率差异显著(P<0.05)。这表明猪不同大小卵泡颗粒细胞FSHR mRNA的表达量与其卵母细胞体外培养成熟率呈相关性,进一步证实FSHR在猪卵泡及卵母细胞发育中起着重要作用。 相似文献
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实验探讨了大豆黄酮(DAI)对伊莎鸡卵泡发育及其芳香化酶(P450arom)mRNA表达的影响。实验选取16只产蛋后期伊莎鸡,等分为对照组和DAI处理组。对照组饲喂基础日粮,实验组在基础日粮中添加10 mg/kgDAI。实验持续7周后,分离排卵前卵泡(F1、F2、F3……)的颗粒层及小黄卵泡和大白卵泡,通过RT-PCR法检测P450arom mRNA表达的相对丰度。结果表明:DAI明显提高了伊莎鸡小黄卵泡和大白卵泡的数量,P450arommRNA在伊莎鸡不同发育阶段卵泡中的表达存在差异,部分卵泡P450arom mRNA表达的相对丰度显著增加。因此,在产蛋后期伊莎鸡基础日粮中添加DAI可增加不同发育阶段卵泡的数目,上调部分卵泡中与发育相关的基因表达以促进卵泡发育。 相似文献
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为了阐明绵羊卵泡颗粒细胞功能调控机制，试验选取不同条件培养的绵羊卵泡壁层颗粒细胞(MGCs)和卵丘颗粒细胞(CCs),分别设置对照组、FSH组和GDF9+FSH组，利用qPCR、Western blot和免疫荧光法分别检测MGCs和CCs中NPPC和NPR2的mRNA和蛋白表达量。结果表明：对于壁层颗粒细胞，FSH组NPPC 12 h mRNA及12,24 h蛋白水平显著高于对照组(P<0.05),极显著低于GDF9+FSH组(P<0.01);体外培养16 h后，与对照组相比，FSH组NPR2 mRNA及蛋白表达水平显著提高(P<0.05),但与GDF9+FSH组差异不显著(P>0.05)。对于卵丘颗粒细胞，FSH组NPPC mRNA及蛋白水平极显著高于对照组和GDF9+FSH组(P<0.01);FSH组NPR2 mRNA及蛋白表达水平显著高于对照组和GDF9+FSH组(P<0.05)。说明FSH可以显著提高体外培养的绵羊卵泡颗粒细胞中NPPC、NPR2的表达；GDF9可以促进FSH诱导的壁层颗粒细胞中NPPC的表达，但抑制了FSH诱导的卵丘细胞颗粒... 相似文献
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《中国兽医学报》2019,(8):1628-1634
为探讨卵泡期卵泡颗粒细胞促卵泡素特异性受体(FSHR)差异剪接体表达的变化,选择30只道寒杂交一代育成母羊肌注PG+埋植CIDR+肌注PG进行同期发情处理,选取9只发情母羊屠宰,取两侧卵巢组织,按小卵泡(≤3.0 mm),中等卵泡(3.0～5.0 mm)和大卵泡(≥5.0 mm)级别分别收集卵泡液和颗粒细胞,采用放射性免疫法测定类固醇激素(E_2和P_4)和FSH浓度,实时定量PCR检测不同直径卵泡颗粒细胞FSHR差异剪接体表达水平。结果表明,小卵泡和中等卵泡中FSHR1和FSHR3 mRNA的表达量极显著高于FSHR2和FSHR4(P0.01),在中等卵泡中FSHR3 mRNA的表达量显著高于FSHR1(P0.01);大卵泡中FSHR2 mRNA的表达量显著高于FSHR1、FSHR3和FSHR4(P0.01),FSHR1、FSHR3和FSHR4 mRNA的表达量差异不显著(P0.05)。大卵泡中雌激素浓度极显著高于小卵泡和中等卵泡(P0.01),孕酮浓度无显著性差异(P0.05),E_2/P_4比值与大卵泡中FSHR3 mRNA的表达量呈极显著负相关(P0.01)。由结果可知,卵泡发育过程中FSHR1和FSHR3可能是小卵泡和中等卵泡颗粒细胞增殖的2种主要剪接形式。 相似文献
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《中国兽医学报》2020,(7)
为探讨RAC1基因在鸡前等级卵泡的表达特性及定位,本试验以海兰褐蛋鸡为供试材料,采用半定量RT-PCR方法对RAC1基因在鸡前等级卵泡组织中的mRNA表达水平进行测定分析,并进一步采用免疫组化的方法对RAC1蛋白在前等级卵泡的表达模式进行蛋白质定位研究。结果表明,RAC1基因在鸡不同直径的前等级卵泡内均有表达,但表达丰度存在一定的差异,在直径6～8 mm卵泡中相对表达量显著高于直径4～5.9,1～3.9 mm的卵泡(P0.05);RAC1蛋白主要在卵母细胞、颗粒细胞和膜层细胞中表达,且主要分布在细胞质中,为进一步研究RAC1在鸡前等级卵泡发育中的作用提供了理论基础。 相似文献
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瘦素和FSH对绵羊卵泡颗粒细胞孕激素分泌的影响 总被引：1，自引：0，他引：1
试验旨在探明瘦素和卵泡刺激素(FSH)对绵羊卵泡颗粒细胞孕激素分泌的影响并建立瘦素和FSH之间的相互作用。从屠宰场收集健康母羊的卵巢,机械分离卵泡,收集卵泡颗粒细胞。在细胞培养液中加入不同浓度的FSH(0 U/mL,2.5 U/mL,5 U/mL,7.5 U/mL,10 U/mL)培养24 h和48 h,通过MTT检测细胞增殖,以确定后续试验FSH的使用浓度。在细胞培养液中加入瘦素(0 ng/mL,25 ng/mL,50 ng/mL)和FSH(5 U/mL)单独或联合作用48 h后,通过ELISA检测细胞培养液中孕酮(P_4)的浓度。收集细胞,通过qPCR和Western blotting检测CYP11A1、STAR、3β-HSD的表达。结果表明:5 U/mL的FSH浓度可显著促进细胞生长,使类固醇相关基因(CYP11A1、STAR、3β-HSD)的表达升高(P<0.05),但对其蛋白无显著影响,对P4分泌无刺激作用。单独添加瘦素时,25 ng/mL瘦素降低了CYP11A1、STAR、3β-HSD基因的表达(P<0.05),但相应蛋白无显著性差异,同时对P_4的分泌无影响;50 ng/mL瘦素降低了STAR、CYP11A1基因的表达,但相应蛋白表达和P4分泌未受影响。瘦素和FSH联合使用时,P4分泌显著降低,STAR表达降低(P<0.05),但对其他类固醇合成基因和蛋白(CYP11A1、3β-HSD)的表达无显著影响(P>0.05)。综上所述,FSH对绵羊卵泡颗粒细胞增殖和类固醇合成基因表达有促进作用;瘦素对FSH诱导下P_4的分泌有抑制作用,且具有剂量依赖性,提示瘦素参与卵泡的发育过程。 相似文献
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为了明确Ghrelin在绵羊卵巢有腔卵泡上是否存在表达,本研究利用实时定量RT-PCR技术检测了绵羊卵巢有腔卵泡内的卵母细胞、卵丘细胞和壁层颗粒细胞的Ghrelin蛋白的表达量情况。结果揭示绵羊卵巢有腔卵泡内各类型细胞Ghrelin mRNA的相对表达量大致相同。绵羊卵巢有腔卵泡内各类型细胞Ghrelin蛋白的表达及Ghrelin mRNA的表达模式,尤其是卵母细胞中的表达,揭示这一新型分子在绵羊卵巢上具有潜在的调控作用。 相似文献
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生长激素释放肽(Ghrelin)是一种在动物体内广泛存在的生长激素促分泌素受体(GHSR)的内源性配体, Ghrelin与位于下丘脑的GHSR结合后,具有促进生长激素释放、增加食欲、调节消化系统功能及能量代谢等作用。文章就Ghrelin的结构、分布、生物学效应及在畜牧业上的应用前景等方面进行综述,以期促进Ghrelin的进一步深入研究。 相似文献
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生长激素释放肽(ghrelin)是在大鼠和人胃内发现的,是一种生长激素促分泌素受体(growth hormone secretagogue receptor,GHSR)的内源性配体.ghrelin与位于垂体、下丘脑的GHSR结合后,具有促进生长激素释放、增加食欲、调节消化系统功能和能量代谢等作用.本文对ghrelin的... 相似文献
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Sechman A Lakota P Wojtysiak D Hrabia A Mika M Lisowski M Czekalski P Rzasa J Kapkowska E Bednarczyk M 《Journal of veterinary medicine. A, Physiology, pathology, clinical medicine》2006,53(10):501-508
The study was performed to determine the hormonal status of mature germline chimeras obtained by blastodermal cell transfer from chicken embryos of a donor breed [Green-legged Partridgelike breed (GP) x Araucana (AR)] to those of a recipient breed [White Leghorn (WL)] being at the same stage of embryonic development. The egg-laying chimeras and WL hens (control) of the same age were used in the experiment. At first, blood samples were taken from each bird at 0.5, 5, 12.5 and 18.5 h following oviposition. Subsequently, the chimeras and the WL hens were decapitated 1-2 h after ovulation. A stroma and the following follicles were isolated from the ovary: white normal (1-4, 4-6 and 6-8 mm), white atretic and yellow preovulatory follicles (F4-F1). Sex hormones, progesterone (P4), testosterone (T) and oestradiol (E2) in blood plasma and ovarian follicles were determined radioimmunologically. The activity of the 3beta-hydroxysteroid dehydrogenase (3beta-HSD) in the granulosa and theca layers of the follicles was analysed histochemically. In chimeric chickens, a higher level of T in blood plasma during the ovulatory cycle was noticed. However, in the stroma, white prehierarchical and medium-size preovulatory ovarian follicles the level of T was significantly lower. With respect to E2, its elevated levels were found both in blood and in the ovarian follicles. There were no significant differences in P4 concentrations in blood plasma while in ovarian follicles a higher level was observed only in white 6-8 mm follicles. 3beta-HSD activity in granulosa and theca layers of the ovarian follicles in chimeras was not different from that in the WL hens. In conclusion, the results obtained indicate that germline chimeras exhibit significant alterations in sex hormone levels in the ovary and blood plasma, which in turn may affect their reproductive abilities. 相似文献
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Inhibin and oxytocin were immunohistochemically demonstrated in all non-atretic and light-atretic follicles > 2 mm from untreated and pregnant mare's serum gonadotrophin (PMSG)-treated heifers and cows. Immunostaining for luteinizing hormone (LH) and oestradiol was observed in all non-atretic follicles > 4 mm, but only in follicles from PMSG-treated cows. Inhibin and oestradiol immunoreactivity was restricted to the granulosa. Oxytocin and LH immunoreactivity was visualized in both the theca interna and the granulosa. Within the granulosa, LH immunoreactivity was mainly present in cells that were located near the basement membrane. Normal granulosa cells differed from atypical granulosa cells (AGCs) with respect to their ability to bind LH and oestradiol. It is concluded that immunostaining for alpha-inhibin, oxytocin, oestradiol and LH cannot be used as a marker of follicle quality to discriminate between non-atretic follicles with AGCs and non-atretic follicles without AGCs in mid-luteal bovine ovaries. 相似文献
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鹅卵泡颗粒细胞凋亡及其与生殖激素间的关系 总被引：1，自引：0，他引：1
采用正处于产蛋期的扬州鹅10只，取其卵泡分离颗粒层细胞，用70％乙醇固定后，应用流式细胞术分析颗粒细胞凋亡情况。同时，用连续采血的方法，每3h采血一次，分离血浆，用放射免疫分析法测定血浆促卵泡素（FSH）、促黄体素（LH）、雌激素（Ez）水平，用以分析激素水平与凋亡间的关系。结果表明：（1）无论是健康卵泡还是闭锁卵泡，颗粒细胞90％以上均处于G1期，2％～6％处于G2期，S期比例最小；（2）闭锁卵泡颗粒细胞凋亡率极显著高于健康卵泡（P〈0．01）；（3）随着健康卵泡直径的增加，颗粒细胞的凋亡呈降低趋势；（4）健康组鹅的FSH、E2水平要高于闭锁组，而LH水平要低于闭锁组。 相似文献
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Luteinizing hormone (LH) stimulates a cascade of ovarian hormonal events that culminate in ovulation. This study was designed to investigate, in sheep, sequential changes in prostaglandin (PG) E2, PGF2 alpha, 6-keto-PGF1 alpha, and cyclic adenosine monophosphate (cAMP) in the theca, granulosa and follicular fluid of large preovulatory follicles and small nonovulatory follicles in response to LH. On d 15 postestrus, preovulatory or nonovulatory follicles were injected intrafollicularly with saline or LH. Ewes were then ovariectomized at 0, 2, 4, or 8 h postinjection. Injected follicles were excised; theca, granulosa and fluid were separated, weighed and assayed for cAMP and PG. Contents of cAMP in the theca, granulosa and fluid of preovulatory follicles increased (P less than .01) 2 to 4 h after injection of LH. Increases (P less than .05) in contents of PGE2 and PGF2 alpha in the theca and fluid of preovulatory follicles were observed between 4 and 8 h after injection of LH. The time courses of LH-induced synthesis of PGE2 and PGF2 alpha in preovulatory follicles were parallel. Luteinizing hormone had no effect on PGE2, PGF2 alpha or cAMP in any compartment of small follicles. Contents of 6-keto-PGF1 alpha varied with time in both theca and granulosa of large and small, saline- and LH-injected follicles. Although specific increases in cAMP and PG followed an injection of LH only in large follicles, the parallel temporal relationship of PGE2 and PGF2 alpha did not explain the dichotomous functions ascribed to PGE2 and PGF2 alpha during the periovulatory period. 相似文献