Follicle-stimulating hormone is expressed in ovarian follicles of chickens and promotes ovarian granulosa cell proliferation          下载免费PDF全文

BI Yu-lin  YANG Shu-yan  WANG Hai-yan  CHANG Guo-bin  CHEN Guo-hong 《农业科学学报》2021,20(10):2749-2757

Follicle-stimulating hormone(FSH), an important hypothalamic-pituitary-gonadal axis(HPG) hormone, is secreted by the pituitary gland. This study confirms that FSH is expressed in chicken follicles at different stages, and positive FSHβ mRNA signals were stronger(P0.05) in granulosa cells than in oocytes. The 369 bp coding sequence of FSHβ in ovaries is 100% identical to that in the pituitary gland. The experiment in vitro revealed that the ovary possessed FSH secretory capacity. Further, FSHβ mRNA was significantly upregulated(P0.05) in follicles and significantly higher(P0.05) than that in the pituitary gland by approximately 2–23 times with the development. The number of granulosa cells decreased significantly(P0.05) in the cells with siRNA treatment, confirming that the ovarian FSH could promote granulosa cell proliferation. This view was supported by cell cycle analysis and CCND2 and CCNE2 expression. Further research indicated that no difference(P0.05) was observed between the number of granulosa cells treated with FSHβ siRNA and in exogenous FSH. However, the number of granulosa cells without FSHβ siRNA transfection was significantly higher(P0.05) for exogenous FSH. This finding suggests that the proliferative effect of exogenous FSH on ovarian granulosa cells depend on endogenous FSH. This study demonstrated that the FSH gene was expressed in chicken follicles and promoted ovarian granulosa cell proliferation, which enriched the theory on HPG axis.  相似文献   

Postpartum follicular and luteal activity in Holstein-Friesian cows genetically selected for high or low mature bodyweight: Relationships with follicle stimulating hormone,insulin, insulin-like growth factor-1 and growth hormone     

J Thiengtham  TJ Parkinson  CW Holmes 《New Zealand veterinary journal》2013,61(6):310-318

AIM: To investigate ovarian follicular and luteal activity during the postpartum period of cows genetically selected for high or low mature bodyweight, in relation to metabolic and reproductive endocrine parameters, to determine whether there are differences between strains that could affect fertility outcomes.

METHODS: The presence of follicles ≥5 mm diameter and luteal structures was mapped in the ovaries of 12 high (heavystrain) and 12 low (light-strain) mature bodyweight cows by daily trans-rectal ultrasonography from Day 7 postpartum until the end of their first normal oestrous cycle. Blood samples were collected daily, for measurement of concentrations of follicle stimulating hormone (FSH), progesterone, growth hormone (GH), insulin-like growth factor-1 (IGF-1), and insulin. Intervals to first ovulation were calculated from ultrasonography data.

RESULTS: Heavy-strain cows had shorter intervals than light-strain cows from calving to the emergence of the first (9.0 (SE 0.9) vs 12.4 (SE 1.3) days) and second (16.4 (SE 1.8) vs 20.6 (SE 1.6) days) dominant follicles (p<0.05). Concentrations of FSH in heavy-strain cows prior to the emergence of the second, third and fourth dominant follicles were higher than in light-strain cows (p<0.05). Heavy-strain cows were more likely to have a large (>15 mm diameter) follicle earlier than light-strain cows (p<0.01). Concentrations of insulin and IGF-1, but not those of GH, were higher in heavy- than light-strain cows during the postpartum period (p=0.01 and p=0.02, respectively), and concentrations of both on Day 6 were inversely related to the time of emergence of the first dominant follicle (p>0.01).

Concentrations of progesterone were similar in both strains of cow until Day 10 of the first oestrous cycle, but thereafter were higher in light- than heavy-strain cows until Day 16. Progesterone concentrations in heavy-strain cows declined earlier and more rapidly than in their lighter counterparts.

CONCLUSION: These results indicate that there is a rapid postpartum resumption of follicular activity in both heavy-and light-strain cows, but that there is an earlier emergence of dominant follicles and ovulation in the former. Differences in luteal function, in terms of lower dioestrus progesterone concentrations and an earlier onset of luteolysis, in heavy- than light-strain cows might be sufficient to impair the fertility of the former.  相似文献   

Some Arthropods Affecting Man and Livestock in New Zealand     

G. A. H. Helson 《New Zealand veterinary journal》2013,61(1):11-18

Extract

At present, the standard tuberculin test used in New Zealand is the subcaudal intradermal test using 0·1 ml Commonwealth Serum Laboratories Synthetic Medium tuberculin, animals being classified as positive or negative to the test on the presence or absence of any swelling either visible or palpable at the site of the injection at the 96th hour.  相似文献   

Endocrinology of number of follicular waves per estrous cycle and contralateral or ipsilateral relationship between corpus luteum and preovulatory follicle in heifers     

O.J. Ginther  S.T. Bashir  M.M. Hoffman  M.A. Beg 《Domestic animal endocrinology》2013

A 3-d extension of the luteal phase occurs in interovulatory intervals (IOIs) with a contralateral relationship between the corpus luteum (CL) and preovulatory follicle with 3 follicular waves (Contra-3W group). Concentrations of FSH, progesterone, LH, and estradiol-17β for the ipsilateral versus contralateral CL and/or follicle relationship and 2 versus 3 waves per IOI were studied in 14 heifers. Follicular waves and FSH surges were designated 1, 2, or 3, according to order of occurrence in the IOI. The day (day 0 = ovulation) of the FSH peak in surge 2 occurred earlier (P < 0.02) in 3-wave IOIs (day 6.3 ± 0.5) than in 2-wave IOIs (day 8.5 ± 0.5). Mean FSH was higher in 3-wave than in 2-wave IOI on 82% of the days in the IOI. Repeatability or individuality in FSH concentration was indicated by a correlation (r = 0.54, P < 0.04) in FSH concentrations between ovulations at the beginning and at the end of the IOI. Concentrations of LH and estradiol increased (P < 0.05) near the beginning of the luteolytic period in 2-wave IOI regardless of the CL and/or follicle relationship. In the Contra-3W group, LH and estradiol remained at basal concentrations concurrently with FSH surge 3 and extension of the luteal phase. The hypotheses were supported that FSH surge 2 occurs earlier in 3-wave IOIs than in 2-wave IOIs and that the development of 3-wave IOIs occurs in individuals with greater FSH concentrations. Extension of the luteal phase in the Contra-3W group was temporally associated with lower concentrations of LH and estradiol.  相似文献   

Ghrelin和GHS-R1a mRNA在牛卵母细胞体外成熟过程中的表达     

米焱  张伶俐  李海军  杜晨光  曹贵方 《中国农业科学》2013,46(9):1939-1945

【目的】探讨Ghrelin和GHS-R1a mRNA在牛卵母细胞体外成熟过程中的表达及二者表达与FSH之间的关系。【方法】 利用实时定量RT-PCR技术检测体外成熟进程中牛卵母细胞Ghrelin和GHS-R1a mRNA水平表达变化,观察不同浓度FSH对Ghrelin和GHS-R1a mRNA表达的作用以及FSH与FSH受体抑制剂的组合对Ghrelin和GHS-R1a基因表达的影响。【结果】 实时定量RT-PCR结果揭示牛卵母细胞Ghrelin和GHS-R1a mRNA的相对表达量随着成熟过程的延长而呈现一定变化规律,即Ghrelin和GHS-R1a mRNA在卵母细胞体外成熟过程中从8 h开始显著下降并持续此低表达水平到24 h;不同浓度FSH 显著抑制卵母细胞Ghrelin及GHS-R1a mRNA的表达,而FSH 受体抑制剂明显减弱FSH的抑制作用而促进二者表达。【结论】Ghrelin和GHS-R1a mRNA在卵母细胞体外成熟过程中的表达可能随着培养液中FSH升高而降低。  相似文献   

FSH和17β-雌二醇联合作用对仔猪睾丸 支持细胞Skp2表达的调节     

张国升  左敬  甘瑞  朱峰伟  孙燕  王鲜忠  张家骅 《中国农业科学》2011,44(11):2347-2354

 【目的】确定FSH和雌激素联合作用是否可通过ERK1/2级联调节培养条件下未成熟仔猪睾丸支持细胞中Skp2的表达。【方法】以培养的仔猪睾丸支持细胞为试验材料,通过添加各种信号通路的抑制剂,应用Western blotting和实时荧光定量PCR检测Skp2蛋白、mRNA的表达。【结果】FSH（50 ng·mL-1）和17β-雌二醇（10-9 mol·L-1）联合作用时以时间依赖的方式促进了Skp2蛋白和mRNA的表达（P＜0.05）,这一作用在30 min时到达高峰;FSH（50 ng·mL-1）、17β-雌二醇（10-9 mol·L-1）和forskolin单独作用均促进了Skp2蛋白和mRNA的表达（P＜0.05）,FSH（50 ng·mL-1）和17β-雌二醇（10-9 mol·L-1）联合作用对Skp2表达的影响与FSH或17β-雌二醇（10-9 mol·L-1）单独作用无显著差异（P≥0.05）,而环磷酸腺苷抑制剂（Rp-cAMP）、蛋白激酶A（PKA）抑制剂（H-89）、L-Ca2+离子通道抑制剂（verapamil）和ERK1/2抑制剂（U0126）单独作用时对Skp2蛋白和mRNA的表达与空白对照相比无显著影响（P＞0.05）,但都抑制了FSH（50 ng·mL-1）与17β-雌二醇（10-9 mol·L-1）联合作用对Skp2蛋白和mRNA表达的影响（P＜0.05）。H-89、verapamil单独作用对ERK1/2（细胞外信号调节的蛋白激酶1/2）活性没有影响,但降低了FSH（50 ng·mL-1）和17β-雌二醇（10-9 mol·L-1）联合作用对ERK1/2活性的影响。【结论】 FSH与17β-雌二醇联合作用激活了cAMP-PKA级联和Ca2+内流,而PKA和Ca2+内流又通过影响ERK1/2的活性进而影响Skp2的表达。  相似文献   

核心群奶牛超数排卵技术影响因素的研究          下载免费PDF全文

《中国牛业科学》2022,48(5):17-21

[目的]为进一步研究核心群奶牛超数排卵技术影响因素。[方法]试验使用3个FSH剂量和4 个公牛精液对27头青年奶牛进行超数排卵。对供体牛胚胎生产情况和受体胚胎移植妊娠率进行统计。[结果]结果显示供体2次超排获得7.8枚平均可用胚胎显著高于1次超排获得的5.7枚平均可用胚胎(P<0.05);260,280 mg FSH超排供体获得6.0和7.7 枚平均可用胚胎显著高于300 mg FSH超排供体获得的4.6枚平均可用胚胎(P<0.05);供体使用4个公牛精液人工授精后获得的平均可用胚胎数和平均未受精卵数差异不显著(P>0.05);移植前接种疫苗的受体胚胎移植妊娠率显著降低(P<0.05）。[结论]核心群奶牛超排适宜FSH剂量为260-280 mg,使用高受精力公牛精液和对超排反应好的供体重复超排能够提高超排效率,受体移植前避免疫苗接种能够提高胚胎移植妊娠率。  相似文献   

不同处理方法对家兔超数排卵的影响   总被引：3，自引：0，他引：3  

胡军和  屈雷 《安徽农业科学》2008,36(25)

[目的]确定家兔稳定高效的超数排卵方法。[方法]PMSG试验组母兔颈部皮下注射PMSG 406、0、80 IU/只,FSH试验组母兔颈部下注射FSH 6次,每次间隔12 h,注射量递减,总用量分别为80、604、0 IU/只,注射PMSG、FSH后耳缘静脉注射HCG 100 IU/只,计算卵子回收率,比较2种处理方法的超数排卵效果。[结果]应用PMSG超排时,60 IU/只试验组的卵子回收率显著高于其他2组(P<0.05)。应用FSH递减法超排时,总用量为60 IU/只的试验组的卵子回收率显著高于其他2组(P<0.05)。FSH递减法试验组和PMSG试验组的卵子回收率无显著差异(P>0.05)。[结论]以60 IU/只的PMSG联合100 IU/只的HCG对家兔进行处理的超排效果最好,卵子回收率达70%。  相似文献   

FSH对牛腔前卵泡体外发育的影响     

高志花  刘立文  刘建成  付永斌  王净  周虚 《西北农业学报》2008,17(2):10-12

为探讨FSH对牛腔前卵泡体外发育的影响,在McCoy’s 5a基础无血清培养液中,分别加入浓度为0、1、10、50及100 ng/mL FSH,观察培养不同时间腔前卵泡的生长和存活情况。结果显示,在培养6 d后添加50及100 ng/mL FSH组腔前卵泡及其卵母细胞直径都较对照组及其他处理组有较大幅度的增长(P<0.01);添加10 ng/mL以上FSH组腔前卵泡在培养后期的体外存活率也有明显提高(P<0.05),表明适宜浓度的FSH对培养后期腔前卵泡体外发育具有显著的促进作用。  相似文献   

妊娠和泌乳期大鼠血清激素水平的变化     

李海霞  李和平  钟凯  郭豫杰  鲁维飞  刘涛  王月影 《安徽农业科学》2008,36(27)

[目的]探讨大鼠血清糖代谢激素与生殖激素的关系及其与生殖周期活动的相关性。[方法]以妊娠中晚期和泌乳早中期的24只雌性处女SD大鼠和12只雄性SD大鼠为研究对象,用放射免疫法测定大鼠血清FSH、LH、胰岛素和胰岛素抗体的水平。[结果]FSH从妊娠中期到泌乳早期呈现先下降,再升高,后下降的趋势,泌乳中期降至最低,差异不显著;LH从妊娠中期到泌乳早期变化不大,从泌乳早期到泌乳中期有所上升,且差异显著;胰岛素和胰岛素抗体结合率从妊娠中期到妊娠晚期呈上升趋势,从妊娠晚期到泌乳早期急剧下降,泌乳早期降至最低,至泌乳中期迅速升至妊娠中晚期水平。[结论]大鼠血清胰岛素及其抗体与LH在妊娠和泌乳期的变化一致,与FSH的变化相反。  相似文献