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1.
抑制素pCIS基因免疫对黄牛卵泡发育和生殖激素的影响   总被引：2，自引：1，他引：1  
分别用O(C)、0.75(T1)、1.50(T2)、2.25(T3)和3.0(T4)nag·头'-1的抑制素pCIS基因疫苗免疫58头黄牛,以探讨抑制素pCIS基因免疫对卵泡发育和生殖激素的影响.结果表明,抑制素pCIS基因免疫组的大卵泡(d≥10 mm)数显著高于对照组(P<0.01),中卵泡(7 mm≤d<10 mm)数和小卵泡(4 mm≤d<7 mm)数与对照组均没有显著差异(P>0.05),T1组左右两侧成熟卵泡大小与对照组差异不显著(P>0.05),其它3组两侧成熟卵泡均显著大于对照组(P<0.05).抑制素pCIS基因免疫黄牛的促卵泡素(FSH)平均含量高于对照组,且在加强免疫阶段差异显著(P<0.05);加强免疫后雌二醇(E2)和孕酮(P4)含量均显著增加,且均与对照组差异显著(P<0.05).这些结果表明,抑制素pCIS基因免疫可促进FSH分泌,进而影响黄牛卵泡发育和成熟.  相似文献   

2.
将90只大鼠随机分为5组,分别注射10μg.100μL-1 pcISI(T1)、50μg.100μL-1 pcISI(T2)、100μg.100μL-1(T3)pcISI、100μg空载体pcMV-S(V)和100μL生理盐水(S),以探讨在不使用免疫佐剂的情况下,不同剂量的双拷贝抑制素pcISI基因免疫对大鼠卵泡发育、产仔和生殖激素的影响。结果表明,加强免疫能提高抗体P/N值,加强免疫后各剂量组平均抗体P/N值大于2,T3组抗体P/N值显著高于T1和T2组(P<0.05)。T3组成熟卵泡数显著高于对照组(P<0.05),且抗体阳性鼠成熟卵泡数比阴性鼠多12.45个(P<0.05)。除了T1组外,其他2个剂量组产仔数和胎盘数均高于对照组(P<0.05)。抗体阳性鼠胎盘数比阴性鼠多5.09个(P<0.05),产仔数比阴性鼠多5.39个(P<0.05)。抑制素pcISI基因免疫大鼠后促卵泡素(FSH)、雌二醇(E2)和孕酮(P4)含量均高于对照组,T3组的FSH含量与对照组差异显著(P<0.05),T3组的E2含量与对照组差异极显著(P<0.01),各剂量组P4含量与对照组差异均不显著(P>0.05)。这些结果说明,在没有免疫佐剂的前提下,双拷贝抑制素pcISI基因免疫可产生抗体,促进FSH分泌和卵泡发育,增加产仔数。本试验条件下100μg.100μL-1是最佳免疫剂量。  相似文献   

3.
抑制素基因免疫的免疫反应性   总被引：9，自引：1，他引：9  
通过应用抑制素真核表达质粒pcINH和抑制素融合表达质粒pCIS分别经肌肉注射免疫大鼠的2个系列试验，检测了免疫鼠抑制素抗体水平及抗体阳性鼠的比例。结果，抑制素质粒pcINH经脂质体介导免疫大鼠，50％（13／26）的个体产生了抑制素阳性抗体。40μg组产生的抗体水平最高；抑制素融合表达质粒pCIS免疫经盐酸普鲁卡因处理的大鼠，2次免疫获得了38.9％（23／54）的抗体阳性率。3次免疫获得55．6％（20／36）的抗体阳性率，100μg组产生的抗体水平最高；加强免疫可提高抗体的水平。但免疫剂量的增加并不一定能增加抗体阳性鼠的比例。  相似文献   

4.
将50只大鼠随机分为5组,分别注射0.2（T1）、0.6（T2）、1g/L（T3）pEGISI,100μg空载体pEGFP-N1（C1）和100μL生理盐水（C2）,以探讨在没有使用免疫佐剂的情况下,抑制素与GFP融合基因疫苗pEGISI免疫对大鼠卵巢和生殖激素的影响。研究结果,加强免疫能提高抗体P/N值,T3组在加强免疫期与对照组差异显著（P〈0.05）;加强免疫第2周时T3组抗体阳性鼠比例达40%,与T1和T2组差异均显著（P〈0.05）。T3组卵巢大小和卵泡数均显著高于对照组（P〈0.05）,但抗体阳性鼠大卵泡数与阴性鼠差异不显著（P〉0.05）。各剂量组促卵泡素和雌二醇均高于对照组,且在加强免疫第2周时T3组与对照组差异显著（P〈0.05）;各剂量组孕酮含量与对照组差异均不显著（P〉0.05）。结果表明,在没有使用免疫佐剂的前提下,抑制素pEGISI基因免疫可产生抗体,促进卵巢发育和FSH分泌。本试验条件下100μg是最佳免疫剂量。  相似文献   

5.
抑制素基因免疫对小鼠生殖的影响   总被引：27，自引：5，他引：27  
用编码抑制素α（1－32）的基因与pcDNA3.1真核表达质粒进行重组，构建抑制素基因疫苗NH。将30只2周龄ICR小鼠随机分为3组（每组10只），试验Ⅰ，Ⅱ组分别经脂质体介导肌肉注射iINH15μg()0μL,25μg(100μL)，对照组注射免疫空载体pcDNA3.115μg(100μL)。首次免疫后间隔3周加强免疫1次。小经pINH基因免疫后，用ELISA可从血浆中检测到抑制素抗体，表明pINH可在活体肌细胞内表达，表达产物具有制素抗原性，能激活免疫系统产生抑制素抗体。抑制素抗体P／N＞2视为阳性，阳性率为30％（6／20）。抑制素抗体阳性小鼠与阴性小鼠的产仔数，初生重和窝重等没有显著差异（P＞0．05）。抗体阳性组首次免疫后，雌鼠血浆FSH浓度略有升高，经过加强免疫后显著升高（P＜0．05）。由此可以看出，抑制素基因免疫可以诱导产生抗抑制素抗体，并促进促卵泡素的分泌。  相似文献   

6.
选择32只60日龄雌性性成熟大鼠分为4组,分别肌肉注射pcDNA-DPPISS-DINH(试验组1) 50 μg,pcDNA-DPPISS-DINH-mC3d3 (试验组2) 50 μg,空载体pcDNA3.1 (对照组1) 50 μg,生理盐水(对照组2)1 mL.首次免疫20、40 d后各组分别同剂量同样免疫程序加强免疫注射1次.结果发现,试验1和2组卵巢的重量都显著高于对照组1和2,但试验1和2组之间的差异不显著(P＞0.05);试验2组卵巢成熟卵泡发育个数和FSH的浓度显著高于试验1组和对照1和2组(P＜0.05);加强免疫第40天,试验1、2组的E2的浓度分别显著高于本试验组免疫前第0天,免疫后第20天的激素浓度;试验组与对照组在各个免疫试验时间LH的浓度在统计上差异不显著(P＞0.05).结果证明,应用重组抑制素真核表达质粒pcDNA-DPPISS-DINH-mC3d3(试验组2)免疫动物可以促进大鼠卵泡的发育,可提高血浆FSH、E2水平,为抑制素基因免疫大动物提供了试验依据.  相似文献   

7.
抑制素基因免疫对京白鸡产蛋性能的影响   总被引：2，自引：0，他引：2  
120只380 d京白鸡随机分为4组,分别腿部肌肉注射0、50、100、150 μg抑制素真核表达质粒pcISI,20 d后加强免疫1次.ELISA检测抗抑制素抗体水平,观察产蛋量,并进行鸡蛋品质测定.免疫4个月后全部捕杀,统计各级卵泡数.结果表明,抑制素基因加强免疫后抗体水平显著升高(P<0.05),3个剂量组间差异不显著(P>0.05).试验组全期产蛋量极显著高于对照组(P<0.01),大白泡和小白泡比对照组显著增多(P<0.05),优势卵泡、小黄泡和鸡蛋品质与对照组差异不显著(P>0.05).表明抑制素基因免疫京白鸡可产生抗抑制素抗体,并能提高京白鸡的产蛋性能.  相似文献   

8.
选择32只60日龄雌性性成熟大鼠分为4组，分别肌肉注射pcDNA-DPPISS-DINH（试验组1）50μg，poD—NA—DPPISS-DINH—mC3d3（试验组2）50μg，空载体pcDNA3．1（对照组1）50μg，生理盐水（对照组2）1mL。首次免疫20、40d后各组分别同剂量同样免疫程序加强免疫注射1次。结果发现，试验1和2组卵巢的重量都显著高于对照组1和2，但试验1和2组之间的差异不显著（P〉0．05）；试验2组卵巢成熟卵泡发育个数和FSH的浓度显著高于试验1组和对照1和2组（P〈0．05）；加强免疫第40天，试验1、2组的E1的浓度分别显著高于本试验组免疫前第0天，免疫后第20天的激素浓度；试验组与对照组在各个免疫试验时间LH的浓度在统计上差并不显著（P〉0．05）。结果证明，应用重组抑制素真核表达质粒pcDNA-DPPISS-DINH—mC3d3（试验组2）免疫动物可以促进大鼠卵泡的发育，可提高血浆FSH、E2水平，为抑制素基因免疫大动物提供了试验依据。  相似文献   

9.
本研究采用新疆细毛羊抑制素成熟区序列重组融合蛋白(roINH)作为免疫原,以Montanide (MON)和Freund's (FA)作为佐剂,主动免疫SD大鼠,测定生殖激素及卵巢发育情况,评价佐剂效应.选用72只9～10周龄性成熟雌性SD大鼠,随机分为3组,分别皮下注射生理盐水(对照组)、roINH+ MON(MON组)和roINH+FA (FA组).各组大鼠每20 d免疫1次,连续免疫3次.结果,MON组产生的抗体滴度显著高于FA组(P＜0.05);与对照组相比,注射roINH+MON和roINH+FA均可极显著提高大鼠血清FSH平均含量(P＜0.01),显著提高P峰值(P＜0.05),而FSH及P平均含量及峰值在2个免疫组间无显著差异(P＞0.05);LH含量和峰值在2个试验组间无显著差异(P＞0.05); MON和FA组成熟卵泡数无显著差异(P＞0.05),但均显著高于对照组(P＜0.05);MON组脓包直径及炎症反应小于FA组.结果表明,应用roINH作为免疫原并配以MON或FA佐剂免疫大鼠均能取得较好的免疫效果,且MON佐剂炎症反应小于FA佐剂.  相似文献   

10.
抑制素基因免疫大鼠的免疫应答与基因表达   总被引：1，自引：1，他引：1  
为了研究抑制素基因免疫对大鼠免疫应答和发情的影响及免疫后抑制素的组织分布,将60只大鼠分为5组,每只分别肌肉注射10（T1）、50（T2）、100μg pCIS（T3）,50μg pcDNA3.1（V）和生理盐水（S）。ELISA检测抑制素抗体水平,阴道涂片法检测大鼠的发情状况,免疫组化分析抑制素的组织分布。结果显示,不同剂量抑制素基因2次免疫10 d后抗体P/N值均显著升高（P〈0.05）,3次免疫10 d后T2和T3组抗体P/N值进一步显著升高（P〈0.05）,T3组抗体水平有高于T1和T2组的趋势（P〉0.05）;抑制素基因免疫对大鼠的发情无显著影响;3次免疫2周后心脏、肝脏、接种肌肉部位均未检出抑制素;卵巢、肾脏和垂体部位均检出抑制素;而脾脏部位,抑制素质粒免疫组检出抑制素,对照组则未检出抑制素。这些结果表明,免疫剂量和次数的增加没有导致大鼠产生明显的抑制素免疫耐受,抑制素基因免疫大鼠是相对安全的,抑制素的组织分布结果亦为抑制素基因免疫的作用机理研究提供了理论依据。  相似文献   

11.
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks.  相似文献   

12.
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.  相似文献   

13.
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses.  相似文献   

14.
Tropical Animal Health and Production -  相似文献   

15.
The epidemiology of H. placei and of other gastrointestinal nematodes in yearling dairy cattle was examined on two farms in Kiambu District, central Kenya during each of 13 one-month periods from April 1993 to April 1994. On each farm, 32 newly weaned dairy calves were given a single dose of albendazole and then placed on experimental pastures. Twelve of the animals were designated for bi-monthly slaughter (n = 2) and analysis of worm population characteristics and 20 were designated for blood and faecal collection and for weighing. Two parasite-free tracer calves were grazed alongside the weaner calves each month throughout the study period and were also slaughtered for analysis of worm populations. Faecal egg counts, haematological and serum pepsinogen determinations, herbage larval counts, and animal live weight changes were recorded monthly. The study revealed that Haemonchus placei, Trichostrongylus axei, Cooperia spp. and Oesophagostomum radiatum were responsible for parasitic gastroenteritis and that H. placei was the predominant nematode present in the young cattle on both farms. Faecal egg counts from resident cattle and necropsy worm counts revealed that pasture larval levels were directly related to the amount of rainfall. The total worm burdens in the animals were highest during the rainy season (March–June and October–December) and lowest during the dry seasons (July–September and January–February). The very low recovery of immature larvae of H. placei from the tracer calves indicated that arrested development is not a feature of the life cycle of this parasite in central Kenya. The maintenance of the parasite population depended on continuous cycling of infection between the host and the pasture. The agroclimatic conditions of the study area were such that, in general, favourable weather conditions for the development and survival of the free-living stages of gastrointestinal nematodes existed all year round.  相似文献   

16.
The occurrence of ectoparasites in sheep flocks is frequently reported but seldom quantified. Sheep production used to be a predominantly family activity in the state of Sa~o Paulo (Brazil), but it began to become a commercial activity in the past decade. Thus, information about the ectoparasites existing in sheep flocks has become necessary. The present data were obtained by means of questionnaires sent to all sheep breeders belonging to the `Associaça~o Paulista de Criadores de Ovinos' (ASPACO; Sa~o Paulo State Association of Sheep Breeders). Response reliability was tested by means of random visits paid to 10.6% of the respondents. Most of the properties (89.5%) reported the presence of one or more ectoparasites. Screw-worm (Cochliomyia hominivorax) was the most frequent ectoparasite (72.5%), followed by bot fly larvae (Dermatobia hominis, 45.0%), ticks (Amblyomma cajennense) and Boophilus microplus, 31.3%) and finally lice (Damalinia ovis, 13.8%). Combined infestations also occurred, the most common one being screw-worm with bot fly larvae (36.0%) followed by bot fly larvae with ticks (13.9%), screw-worm with ticks (9.3%), bot fly larvae with lice (6.9%), and ticks with lice (5.0%). The most common triple combination was screw-worm, bot fly larvae and ticks (12.8%). Breeds raised for meat or wool were attacked by bot fly larvae and ticks more often than other breeds. Lice were only absent from animals of indigenous breeds. The relationships among these ectoparasites are discussed in terms of sheep breeds, flock size, seasonality and the ectoparasitic combinations on the host.  相似文献   

17.
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed.  相似文献   

18.
Comparison of different tests to diagnose feline infectious peritonitis   总被引：1，自引：0，他引：1  
  相似文献   

19.
An experiment was conducted to study disappearance of C14 to C18 fatty acids, lag times and biohydrogenation (BH) rates of C18 fatty acids of ground soya bean and canola seeds in situ. Three ruminally fistulated Dallagh sheep were used to determine ruminal BH of unsaturated fatty acids (UFAs). Differences in the disappearance of fatty acids through the bags and lag times were observed between the oilseeds. We saw that the longer the incubation time of the oilseeds in the rumen, the lower the content of C18:2 and C18:3. Significantly higher lag times for both C18:2 and C18:3 were observed in ground canola compared to ground soya bean. BH rates of C18:2 and C18:3 fatty acids in soya bean were three times higher than those of canola. These results suggest that the fatty acid profile of fat source can affect the BH of UFAs by rumen micro‐organisms. So that UFAs of canola had higher ability to escape from ruminal BH. It seems that fatty acid profile of ruminant products is more affected by canola seed compared to soya bean seed.  相似文献   

20.
Serum biochemical values and the wet weight to dry weight ratios of tissues were determined in yaks in Shandan county of Gansu province. The liver, kidney, heart and muscle contents of seven elements in yaks were also analysed. Most serum biochemical values were similar to those of cattle, camels and sheep, but the calcium concentration was considerably above the normal range for other ruminants. The liver contained the highest concentrations of copper, manganese and cobalt and the kidney of selenium, iron and calcium.Abbreviations Alb albumin - ALT alanine aminotransferase - AST aspartate aminotransferase - BUN blood urea nitrogen - Chol cholesterol - Glob globulin - -GT -glutamyl transpeptidase - IP inorganic phosphorus - TP total protein  相似文献   

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