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1.
本试验研究了抑制素主动免疫对青年奶山羊外周血生殖激素和产羔的影响。选用8只青年奶山羊,随机分成两组,每组各4只。试验组用人抑制素α亚单位片段(1-32)3次皮下注射进行免疫,生理盐水作对照,然后对8只羊间隔11d连续3次颈部肌肉注射氯前列烯醇(PG)0.1mg,末次注射PG发情后本交配种。结果为试验组4只奶山羊首免后均产生了抗体,末次免疫分别达到1∶64,1∶128,1∶64和1∶64,而对照组均未检测出抗体。8只青年奶山羊第3次注射PG后36～42h内全部发情,试验组的外周血促卵泡激素(FSH)的浓度高于对照组,且峰值的出现较对照组早,雌二醇(E2)的平均浓度显著高于对照组,而促黄体激素(LH)和孕酮(P)的平均浓度差异不显著。试验组比对照组产羔数提高80%。结果说明抑制素主动免疫能提高青年奶山羊的生殖性能。 相似文献
2.
广西农村地区水牛和黄牛同期发情技术的探讨 总被引：1，自引：1，他引：1
[目的]探讨在农村粗放饲养的条件下水牛和黄牛同期发情的处理技术。[方法]研究采用前列烯醇结合孕马血清促性腺激素同期发情处理水牛和黄牛。[结果]青年水牛的同期发情率和受胎率分别是52.9%和35.1%,明显低于经产母水牛的81.5%和45.5%,差异显著（P〈0.05）;青年黄牛和经产母牛的同期发情率和受胎率均无显著性差异。母水牛产犊后120d后,同期发情率和受胎率分别为84.7%和44.8%,均高于产犊后60d以内和60～90d内处理的78.6%和40.7%、76.1%和38.6%,差异显著（P〈0.05）;同期发情处理黄牛,产犊后120d以上的发情率高于产犊后60d以内和60～90d内,差异显著（P〈0.05）,产犊后60～90d内和120d以上在受胎率上均高于60d以内,差异显著（P〈0.05）。[结论]采用前列烯醇结合孕马血清促性腺激素同期发情处理水牛和黄牛的效果很好,值得在广西地区推广。 相似文献
3.
抑制素主动免疫对母牛卵泡发育的影响 总被引：10，自引：0，他引：10
本试验以猪精液抑制素粗提物主动免疫母牛,研究了对母牛卵泡发育和内分泌的影响。免疫,母牛的卵泡发育率为１４５．５％,排卵率为１１８．２％,分别比对照组提高４５．５％和１８．２％。通过放射免疫法对免疫牛血液中ＦＳＨ,ＬＨ,Ｅ２水平测定发现,发情时免疫组母牛ＦＳＨ水平高于对照组,免疫组中多卵发育牛ＦＳＨ水平高于单卵牛,免疫组与对照组中ＬＨ水平相差不大,多卵牛发情时Ｅ２水平较高。 相似文献
4.
【目的】研究免疫抑制素提高奶牛超数排卵的效率以提高胚胎产量。【方法】免疫组首次免疫抑制素α亚基融合蛋白（1 mg?头-1）与白油佐剂混合乳液,首免后第28、56 d分别进行2次加强免疫,剂量为0.5 mg?头-1。对照组同时注射生理盐水与白油佐剂的混合乳液。在第二次加强免疫后10 d,采用FSH四日递减法进行超排处理,并根据母牛发情表现进行人工授精,试验一使用常规冷冻精液输精,试验二使用分离的雌性精子输精,输精后第7天进行冲胚。【结果】主动免疫抑制素能够有效提高血液抗抑制素抗体效价。试验一,免疫抑制素组头均获胚/卵总数为（15.8±2.8）枚,显著高于对照组（8.3±1.5）枚（P＜0.05）;头均可移植胚胎数为（9.6±3.1）枚,稍高于对照组的（5.8±1.6）枚（P＞0.05）。试验二,免疫抑制素组发情时间早于对照组(P＜0.05);输精后第7天血液孕酮浓度显著高于对照组（P＜0.05）;头均获胚胎总数和头均可移植胚胎数分别为（15.4±1.9）枚和（5.7±0.7）枚,显著高于对照组的（9.1±1.2）枚和（3.1±0.5）枚(P＜0.05);免疫组获得的一级胚胎为（3.8±1.0）枚,占总可移植胚数的58%,显著高于对照组的（0.6±0.2）枚或19.8%(P＜0.05)。【结论】主动免疫抑制素能够促进牛卵泡发育、提高超排效率和胚胎产量,在使用性控精液输精时不仅大幅提高雌性胚胎数量,同时大幅提高胚胎质量。 相似文献
5.
将24头产后7 d的荷斯坦奶牛随机分为4组,高、中、低剂量免疫组(记为T1、T2、T3)分别注射1010、109、108 CFU/mL无抗性基因的抑制素真核表达质粒基因疫苗(重组菌C500(pXAIS))各3 mL,对照组(CK)注射10%生理盐水3 mL。初次免疫28 d后进行加强免疫。用B超诊断仪检测产后奶牛子宫恢复情况。结果表明:加强免疫能提高抗抑制素抗体P/N值,各免疫组P/N值均高于对照组,其中T1和T2组均与对照组差异显著(P0.05),加强免疫7 d,后T1组抗体阳性率最高,达83.33%;抑制素基因疫苗免疫30 d内,前21 d子宫颈和子宫孕角恢复较快,后7 d恢复较慢,各免疫组奶牛产后子宫颈恢复时间短于对照组,但差异不显著(P0.05);各免疫组产后子宫孕角恢复时间比对照组短,且T1组的恢复时间(28.75±1.92)d)与对照组((33.75±1.09)d)差异显著(P0.05)。以上结果表明,在本试验条件下,非抗性筛选的抑制素真核表达质粒基因疫苗免疫产后奶牛,加强免疫后能引起较好的免疫应答,且能促进奶牛产后子宫复旧。 相似文献
6.
YANG Li-guo ZHANG Ju-nong WANG Jin-rong YE Rong SANG Run-zi NIU Shu-Li LIU Cheng-hai 《中国农业科学(英文版)》2002,1(4):466-471
Two hundred and seventy multiparous Chinese Yellow cattle (beef) were selected at 1 to 3months postpartum and divided into three groups (90 cows for each). Animals were given both a primary and booster immunizations with a total dose of 3 mg (Group Th) or 1.5 mg (Group Tl) of seminal preparation containing inhibin activity, emulsified with Freund‘s complete adjuvant and incomplete adjuvant (for booster), at 3 or 4-week intervals. Other cows were treated with the same volume of seminal preparation without inhibin activity as procedures mentioned above to serve as a control (Group C). Artificial inseminations were given twice at 8 - 12 h intervals when the cow was in heat. Jugular venous blood samples were collected from each cow and used to assay the presence of antibody against seminal preparation by double-diffusion in agar precipitation test and to detect the titer of inhibin antibody by an ELISA method. Data from 247 cows showed that 83.9% (73/87) of cows were in estrus and ovulated 89 ova altogether, of which 19 cows ovulated twin ova and 15 cows produced twins in Group Th (n = 87). However, only 61.1% (44/72) of cows in Group Tl (n=72) and 62.5% (55/88) of cows in Group C were in estrus and ovulated 46 and 52 ova altogether respectively.The ovulation rate (1.27 + 0.03), calving rate ( 126.3% ) and twinning rate (26.3%) in Group Th were greater than those in Groups Tl or C (P＜0.01). Furthermore, the ovulation rate was associated with antibody titer in sera of immunized animals (r = 0.7507, P ＜0.01). These results indicate that active immunization of postpartum cows against inhibin purified from porcine seminal plasma may increase the ovulation rate and induce twinning, suggesting the potential to develop a method to improve fertility in cows. 相似文献
7.
Effects of Immunization Against Inhibin on Egg-Laying Performance in Magang and Landaise Geese 总被引：1，自引：0，他引：1
HUANG Yun-mao LI Min-yi SHI Zhen-dan BAN Jin QIN Yi-ping 《中国农业科学(英文版)》2007,6(3):355-360
This study aimed to improve egg-laying performance in incubating Magang geese of Guangdong origin and Landaise geese of French origin. In experiment 1, 50 adults, egg-laying Magang geese were inoculated intramuscularly （i.m.） on days 0, 22, and 45 with 1 mL of immunogen containing 1 mg of recombinant chicken inhibin fusion protein. Immunization significantly increased blood antibody titers against inhibin fusion protein, but did not affect the egg-laying performance within 10 days after the first inoculation. From day 15, the egg-laying rate in inhibin-immunized group increased and was significantly higher than the values of control geese from day 40 to 55. However, the reverse was true from day 55 to 75 when more immunized geese developed incubation. In the entire 120 days of the experiment, the immunized geese laid 17.3 eggs in contrast to 16.4 eggs laid by the control geese. From day 30 till the end of the experiment, weight of eggs in the control geese was significantly greater than that in inhibin-immunized birds. In experiment 2, 40 Landaise geese were immunized against inhibin, as described in experiment 1. These geese laid 9.0 eggs on average in contrast to 7.3 eggs laid by nonimmunized control geese over 90 days of egg laying. The above results demonstrated that immunization against recombinant chicken inhibin fusion protein improved egg-laying performance in geese, and the increment was higher in nonincubating geese. 相似文献
8.
A novel method to improve sow reproductive performance: Combination of pre-weaning immunization against inhibin and post-insemination hCG treatment 
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下载免费PDF全文 The feasibility of a novel method to improve sow reproductive performance by combining inhibin immunization and hCG treatment was tested using in vivo and in vitro experiments. In the in vivo experiment, 106 sows were administered an inhibin immunogen on day 7 prior to weaning, and 56 non-treated sows served as the controls. Sows exhibiting oestrous behaviour on day 5 after weaning were artificially inseminated. On day 5 post-insemination, a subset of 50 inhibin-immunized sows received an injection of 1 000 IU human chorionic gonadotropin(hCG). Our results showed that pre-weaning immunization against inhibin marginally improved(P=0.068) total litter size and significantly increased(P=0.044) the live litter size. The overall differences in farrowing rates and live litter size tended toward significance(P=0.10) in the three groups, and the differences in total litter size were not significant(P=0.18). In the in vitro experiment, activin and hCG dose-dependently suppressed(P0.001) and stimulated(P0.001) progesterone(P4) secretion in cultured pig granulosa cells(GCs), respectively, and the suppression effect of activin was reversed(P0.001) by hCG. Activin suppressed P4 secretion mainly by downregulating(P0.001) the expression of StAR, Cyp11 a1, and 3β-HSDII, whereas hCG prevented(P0.001) the suppression effects. These results indicate that the combination of pre-weaning immunization against inhibin and postinsemination hCG treatment provides a novel method for improving sow reproductive performance. 相似文献
9.
本研究采用间接法检测了山羊和水牛人工感染肝片吸虫后外周血液中淋巴细胞增殖能力，自然杀伤（NK）活性和分泌白细胞介质－2（IL－2）的水平，结果表明两组山羊（分别一次感染200或500个囊蚴）感染后的淋巴细胞转化率呈显著下降趋势（P＜0．05，或P＜0．01），水牛（每头慢性感染1200个囊蚴）的淋巴细胞转化率呈显著升高趋势（P＜0．05），未感染水牛的NK活性比山羊的高，感染水牛的NK活性无显著的变化，感染山羊的NK活性有两次高峰，未感染水牛的IL－2水平比山羊高，感染水牛和山羊的淋巴细胞分泌IL－2的水平都有所升高（P＜0．05；或P＜0．01），而感染水牛和山羊的淋巴细胞在体外对重组牛IL－2（r-IL-2)的增殖反应降低，这表明还存在某些因素影响着IL－2参与到TH1细胞群保护性免疫中来，总之，水牛比山羊对肝片吸虫的天然免疫力强，肝片吸虫的感染导致出山羊细胞免疫呈抑制状态，而水牛保持了较高水平的细胞免疫能力。 相似文献
10.
Effect of Inhibin α(1-32)Gene Immunization on the Follicular Development and Reproductive Hormones in Rats 总被引：5，自引：0，他引：5
A total of 40 rats, aged in 30 days, were divided into 4 groups and immunized (intramuscularlyinjection) with 0 μg(control), 15 μg (group 1), 25 μg (group 2) or 40 μg(group 3) of inhibin α(1-32) re-combinant expression plasmid pcINH in combination with liposome. Booster was given without liposome onday 20 after primary immunization. The results showed that 50%(13/26) rats were detected in positive anti-body against inhibin. However, the increase of immunization dosage and booster did not promote the ratio ofantibody positive rats. The number of matured follicles above 0.8 mm in diameter in the antibody positive ratswas 2.3 more than that in the negative rats (P＞0.05). The concentration of blood plasma FSH increased dis-tinctively on day 10 after primary immunization (P＜0.05), but no increase was observed after booster immu-nization. The 17-β-estradiol levels in blood plasma of rats between the positive and the negative groups had noremarkable differences (P＞0.05). These results suggested that recombinant inhibin expression plasmid couldstimulate animal body to produce antibody against inhibin. 相似文献
11.
为探讨双拷贝抑制素pcISI基因疫苗纯度和剂量对肉牛黄体发育的影响,将150头同期发情的南阳黄牛随机分为8个试验组和2个对照组,试验组用pcISI按2种纯度、4种剂量(0.75、1.50、2.25、3.00 mg/头)进行免疫处理,2个对照组分别用空质粒和生理盐水进行处理;初次免疫21 d后进行加强免疫。结果表明:无论用高纯度还是低纯度疫苗免疫,2.25 mg/头剂量处理对黄体的作用效果最明显,且抗体水平与黄体发育密切相关,2.25 mg/头抑制素融合表达质粒组的黄体显著大于0.75 mg/头组(P<0.05),抗体阳性牛两侧黄体显著比抗体阴性牛的大(P<0.05)。 相似文献
12.
本试验在于探讨应用LRH—A_3对提高母畜受胎率的效果。试验组母畜在发情配种的同时肌肉注射LRH—A_3,对照组母畜在发情配种时不作任何处理。试验结果为:水牛试验组的第一情期受胎率是66.03％,对照组是23.09％,试验组高出对照组42.94％,差异极显著(P<0.01);奶牛试验组的第一情期受胎率是72.73％,对照组是45.63％,试验组高出对照组27.10％,差异极显著(P相似文献
13.
“复方益孕液”治疗奶牛不孕症疗效及作用机理 总被引：4，自引：2，他引：4
选取产后60 d以上不发情,患有持久黄体和卵巢机能减退的不孕奶牛50例进行复方益孕液临床治疗试验,利用电化学发光免疫方法对部分患牛治疗前后血清雌二醇(E2)和孕酮(P4)水平进行检测.结果表明,复方益孕液治疗奶牛持久黄体和卵巢机能减退后,发情率分别为83.3%和77.3%,受胎率分别为80.0%和76.5%,显著高于对照组(P<0.01).持久黄体患牛在处理后血清中E2水平不断升高,最高值为(17.81±7.32)pg/mL,P4水平逐渐降低.最低值为(0.75±0.46)ng/mL;卵巢机能减退患牛在处理后血中E2和P4水平均升高,最高值分别为(14.16±9.45)pg/mL和(4.23±1.85)ng/mL.结果表明复方益孕液对治疗奶牛持久黄体和卵巢机能减退引起的不孕症疗效显著,且具有微调体内激素,溶解黄体和诱导发情作用. 相似文献
14.
为了提高奶牛良种化程度,对奶牛冷冻胚胎的规模化移植效果进行了研究。结果表明:PG二次肌注法的发情率显著高于(P<0.05)PG一次肌注法,两种方法的发情同期率均超过85%,受体牛发情时间多集中在肌注PG后48～72h;胚胎解冻后的复苏率达到82.58%,且早期囊胚与囊胚的复苏率要高于桑椹胚(P>0.05);共移植受体牛218头,受胎97头,受胎率为44.5%,且春、秋季的移植效果差异不显著(P>0.05)。为奶牛冻胚的规模化移植研究提供了参考依据。 相似文献
15.
双拷贝抑制素基因免疫对肉牛卵泡和黄体的影响 总被引：1，自引：0，他引：1
【目的】探讨不同剂量的双拷贝抑制素pcISI基因免疫对肉牛生殖能力的影响。【方法】将58头同期发情肉牛随机分为6组, 每组肉牛分别注射0.75（T1）、1.5（T2）、2.25（T3）、3.0 mg/头（T4）pcISI质粒、3.0 mg/头 pcMV-S空质粒（C1）和3 mL/头 生理盐水（Ｃ2）,初次免疫21d后进行加强免疫,以探讨抑制素pcISI基因疫苗对肉牛卵泡和黄体发育的影响。【结果】4个剂量组的大卵泡数均高于对照组,除了T1外,其它3个剂量组均与对照组差异显著（P＜0.05）;T3和T4的中卵泡数均高于对照组,且差异显著（P＜0.05）;T3和T4的小卵泡数均高于对照组,且差异显著（P＜0.05）。无论左侧还是右侧,各剂量组成熟卵泡直径均高于对照组,除了T1外,其它3组两侧成熟卵泡均与对照组差异显著（P＜0.05）。无论左侧还是右侧,4个剂量组黄体直径均高于对照组,且均与对照组差异显著（P＜0.05）;T3黄体最大,T1最小,且T3与T1差异显著（P＜0.05）。加强免疫后10 d（BM10）抑制素抗体与成熟卵泡大小相关显著（r＝0.629,P＜0.05）,与黄体大小相关极显著（r＝0.651,P＜0.01）。【结论】双拷贝抑制素pcISI基因免疫可促进肉牛卵泡和黄体发育,2.25mg为最佳免疫剂量,抑制素抗体水平与卵泡和黄体发育有一定的相关性。 相似文献
16.
为研发一种自渗牛床以维持表层垫料的清洁与干燥,增加奶水牛躺卧时间,提高福利化养殖水平,随机选择体况与体重基本一致的杂交奶水牛30头,平均分成2组,分别饲养在河沙牛床与河沙/木屑牛床上,探索不同厚度河沙与木屑垫料对夏季奶水牛站立与躺卧行为偏好的影响。结果表明,奶水牛在15cm厚河沙牛床(S15)上躺卧7.55h/d,显著高于20cm厚河沙牛床(S20)的4.58h/d和10cm厚河沙牛(S10a)的0.42h/d(P0.05),在采食通道上躺卧仅0.03h/d。与三类河沙牛床相比,奶水牛在采食通道上的非采食站立时间显著较高(P0.05)。在河沙/木屑牛床上,奶水牛偏好选择在10cm厚河沙牛床(S10b)上躺卧(8.63h/d),其后是15cm(WS15)与20cm(WS20)厚的木屑牛床,每天躺卧时间分别是2.01和1.26h;采食通道上躺卧时间仅为0.1h/d。采食通道有显著高于各牛床上的粪便量(P0.05)。综上,在炎热夏季,河沙比木屑更适合作为奶水牛的牛床垫料;自渗牛床上铺15cm厚河沙垫料增加奶水牛躺卧时间;舍内增设专门的采食通道承载了更多的牛粪,保护了自渗牛床垫料的干燥与清洁度。 相似文献
17.
为增强肉牛的繁殖力,应用本实验室构建的抑制素真核融合表达质粒pCISI,提纯后辅以不同的免疫佐剂注入96头母黄牛体内,采用AMI-900兽用B超对其中84头发情牛进行卵泡检测,并对其中78头妊娠牛进行早期胚胎数目检测。结果发现:抑制素质粒pCISI能促进双大卵泡发育(80.95%,68/84),诱发排双卵(60.71%,51/84),诱导黄牛孪生(41.03%,32/78);普鲁卡因佐剂(48.78%)比脂质体(32.43%)效果明显。研究表明,抑制素基因免疫能有效提高黄牛的繁殖率。 相似文献
18.
采用3种不同方案对16头经产奶牛实施超数排卵,然后用X性控冻精进行人工授精。结果显示,3种方案超排头均排卵数分别为10.75、6.00、7.00枚,头均回收胚胎数分别为8.38、4.25、7.00枚,3组均无显著差异(P>0.05);方案Ⅰ超排供体头均获可用胚7.88枚,可用枚率为95.5%,显著高于方案Ⅱ(2.20枚,55.7%)和方案Ⅲ(0.33枚,15.7%)(P<0.05)。方案Ⅱ和方案Ⅲ在头均可用胚数方面无显著差异(P>0.05),但在可用胚率方面,方案Ⅱ显著高于方案Ⅲ(P<0.05)。 相似文献
19.
[目的]了解奶水牛乳汁体细胞计数（SCC）与抗氧化指标之间的相关性,为乳汁质量监控和奶水牛健康养殖提供科学依据.[方法]随机选取南宁某牛场奶水牛139头,同步采集乳样与血样,乳汁SCC采用FOSS体细胞仪测定,血浆和乳清的总抗氧化能力（TAC）采用FRAP法（血浆铁还原力法）测定,丙二醛（MDA）含量采用TBA法（硫酸巴比妥法）测定.[结果]被检的139头奶水牛中,乳汁SCC≥50.00万/mL（隐性乳房炎诊断标准）的样本占被检总数的12.23％,乳汁SCC＜50.00万/mL的样本占被检总数的87.77％;奶水牛血浆和乳清的TAC分别为2.44±1.04和3.78±1.68 U/mL,MDA含量分别为2.07±0.48和1.55±0.52 nmol/mL,其差异均达极显著水平（P＜0.01）.乳清TAC随乳汁SCC的升高而呈下降趋势,二者间呈显著负相关（r=-0.168,P＜0.05）;血浆MDA与乳清MDA间呈显著正相关（r=0.189,P＜0.05）,而血浆MDA与血浆TAC（r=0.391）、乳清MDA与血浆TAC（r=0.315）间呈极显著正相关（P＜0.01）.[结论]乳清TAC可作为检测奶水牛乳房健康及其乳汁质量的备选指标. 相似文献
20.
产后乏情奶牛的诱导发情研究 总被引：3，自引：0，他引：3
本研究用奶牛初乳、新斯的明、孕激素和孕马血清促性腺激素(PMSG)处理产后乏情奶牛,测定处理后24头奶牛乳汁中孕酮(P4)和17β-雌二醇(17β-E2)水平变化。结果表明:初乳对产后乏情奶牛的诱导发情作用,可能与处理后乳汁17β-E2/P4增加有关;注射初乳时,配合用新斯的明能提高发情率;产后乏情奶牛,用初乳十新斯的明+LRH-A2方法处理,可有效地诱导发情,且受胎率较高。 相似文献