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细胞因子与激素对山羊卵母细胞体外成熟及卵裂的影响 总被引：1，自引：1，他引：0
本试验研究了在培养液中添加不同浓度的GDNF、LIF、SCF及其不同组合对山羊卵母细胞体外成熟与卵裂的影响。结果表明:GDNF、LIF、SCF对山羊卵母细胞体外成熟有极显著影响(P<0.01),不同浓度间无显著影响(P>0.05),添加LIF卵母细胞体外成熟率极显著高于GDNF、SCF(P<0.01),添加GDNF、LIF对卵裂率有显著影响(P<0.05),添加SCF对卵裂率无影响(P>0.05);GDN+LIF+SCF组和GD-NF+LIF组卵母细胞成熟率极显著高于LIF+SCF和GDNF+SCF组(P<0.01),添加GDNF+SCF和LIF+SCF对卵母细胞体外成熟率无显著差异,可见,LIF和GDNF对山羊卵母细胞体外成熟有协同作用。胚胎的早期发育上GDNF+LIF+SCF组优于GDNF+LIF组优于LIF+SCF也优于GDNF+SCF,均能显著提高卵裂率。 相似文献
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不同细胞因子对山羊卵母细胞体外成熟与早期胚胎发育的影响 总被引：1，自引：0，他引：1
研究在培养液中添加不同浓度的GDNF、LIF、SCF及其不同组合对山羊卵母细胞体外成熟和早期胚胎发育的影响。结果表明：SCF、LIF、GDNF对山羊卵母细胞体外成熟有显著影响（62．0％、75．5％、63．7％vs53．0％,P〈0．05）,不同浓度间无显著影响（P〉0．05）,添加LIF、GDNF对卵裂率有显著影响（48．1％、43．3％vs26．2％,P〈0．05）,SCF对卵裂率无显著影响（37．6％vs26．2％P〉0．05）,不同细胞因子都能显著提高囊胚率（21．6％、27．3％、26．2％vs6．3％,P〈0．05）。10IU·mL^-1的LIF、15Iu·mL^-1的GDNF和15IU·mL^-1的SCF对山羊胚胎体外生产最好;GDNF＋LIF＋SCF组和GDNF＋LIF组卵母细胞成熟率显著高于LIF＋SCF,GDNF＋SCF,GDNF和LIF组（83．3％、80．3％vs72．8％、65．4％、63．3％、77．9％,P〈0．05）,GDNF＋SCF和LIF＋SCF添加组间对卵母细胞体外成熟无差异（72．8％vs65．4％,P〉0．05）,早期胚胎发育上GDNF＋LIF＋SCF组优于GDNF＋LIF、LIF＋SCF和GDNF＋SCF组,且均能显著提高卵裂率（50．2％、48．9％、47．9％、43．7％vs21．4％,P〈0．05）和囊胚率（31．3％、27．6％、25．5％、24．3％vs13．6％,P〈0．05）。可见GDNF、LIF和SCF能提高卵母细胞的成熟率,早期胚胎的卵裂率和囊胚率,LIF和GDNF对卵母细胞体外成熟有协同作用。 相似文献
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为研究如何在体外获得更好的精原干细胞培养效果,以出生后6～8 d的小鼠为对象,应用两步酶消化法和差速贴壁法分离纯化精原干细胞.分别将浓度为100、200、300和400 ng/mL的红景天多糖加入以Sertoli细胞为饲养层的精原干细胞培养液中,以不添加红景天多糖组为对照,通过RT-PCR法和碱性磷酸酶（AP）染色鉴定细胞,MTT法研究红景天多糖对精原干细胞增殖的影响.RT-PCR和染色结果显示,分离得到的细胞为精原干细胞;MTT结果显示试验组比对照组细胞数量有显著增多（P＜0.05）,增殖率可达152％,且红景天多糖的最适添加量300 ng/mL.说明红景天多糖能显著促进小鼠精原干细胞的体外增殖. 相似文献
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《畜牧与兽医》2016,(7):71-75
探讨一种新的体外培养精原干细胞的方法,为进一步研究精原干细胞增殖与凋亡提供依据。采用组合酶消化、差速贴壁法分离精原干细胞,并设计了支持细胞条件培养基、胶质细胞源性神经营养因子(GDNF)处理培养基以及对照培养基3种培养体系,应用细胞活力分析仪检测精原干细胞数量以及活性,精原干细胞标记蛋白c-kit受体和磷酸酶染色技术进行鉴定,激光共聚焦显微镜技术检测细胞增殖核抗原(PCNA)和BCL-2家族蛋白Bax和Bcl2表达的变化。结果:应用组合酶消化和差速贴d壁法得到了纯度70%以上的精原干细胞;在体外培养7 d以内,PCNA的表达条件培养基组明显好于GDNF处理组以及对照组,Bcl2的表达条件培养基组高于GDNF组和对照组,Bax的表达条件培养基组低于GDNF组和对照组。研究表明在7 d内体外培养精原干细胞,条件培养基明显促进细胞增殖,抑制细胞的凋亡。 相似文献
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为了揭示表皮调节素(Epiregulin/EREG)、上皮有丝分裂原(Epigen/EPG)和干细胞因子(SCF)对山羊精原干细胞(SSCs)增殖的影响,改进SSCs体外培养体系。在含有胶质细胞源性神经营养因子(GDNF)、碱性成纤维细胞生长因子(bFGF)和白细胞抑制因子(LIF)的SSCs培养基基础上,分别添加20 ng/mL干细胞因子、20 ng/mL表皮调节素、20 ng/mL和100 ng/mL上皮有丝分裂原。对富集后山羊SSCs进行12 d的培养,测定培养过程中山羊SSCs生长曲线和细胞活性。结果表明:添加100 ng/mL上皮有丝分裂原和20 ng/mL的表皮调节素相比其他组能够显著促进山羊SSCs的体外增殖和细胞活力(P0.05);其中培养12 d后添加20 ng/mL表皮调节素的细胞活力显著高于其他组,但细胞数量与100 ng/mL上皮有丝分裂原组无显著差异。20 ng/mL SCF相比对照组能够显著提高体外增殖和细胞活力(P0.05),但低于100 ng/mL上皮有丝分裂原和20 ng/mL表皮调节素组(P0.05)。因此,添加100 ng/mL上皮有丝分裂原、20 ng/mL干细胞因子和20 ng/mL表皮调节素能够提高山羊SSCs的增殖,其中添加20 ng/mL表皮调节素效果最佳。 相似文献
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为了研究胶质细胞原性神经营养因子(GDNF)对体外培养小鼠精原干细胞增殖与分化的影响,试验采用差速贴壁法分离小鼠精原干细胞(SSCs)和支持细胞(sertoli),以sertoli为饲养层接种精原干细胞,用免疫荧光染色法对精原干细胞进行鉴定,并将精原干细胞分为2组,试验组培养基中加入GDNF,对照组不加,测定精原干细胞的生长增殖情况,检测精原干细胞生长周期。结果表明:共培养6,9,12,15天时,试验组精原干细胞吸光度值明显高于对照组(P<0.05或0.01)。随着共培养时间的延长,试验组精原干细胞S期染色质含量逐渐增多,然后又逐渐下降,开始另一个分裂周期;与试验组比较,对照组精原干细胞S期染色质含量增长缓慢(P<0.05)。说明GDNF能促进体外分离培养的小鼠精原干细胞的更新增殖。 相似文献
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比较了在无血清培养体系中分别添加小分子化学物质pluripotin(SCl)和白血病抑制因子(LIF)对昆明小鼠ES细胞未分化状态的维持作用,并探讨了SC1在培养液中的最佳浓度.以小鼠胎儿成纤维细胞(MEF)为饲养层,以含LIF的添加血清替代品(KSR)的培养基(ESC-SR)为对照,分别用SC1浓度为0.3、1、3μmol/L的ESC-SR培养液对昆明小鼠胚胎进行分离培养.结果显示:胚胎在添加3 μmol/L SC1的ESC-SR培养液中ICM形成率显著高于对照组(P＜0.05),形成的ES集落与对照组形态差异不明显,最高传至第7代,并且在无饲养层条件下可以传至第6代而保持未分化状态.不同浓度SC1培养液中,胚胎在SC1浓度为0.3 μmol/L组的F2代形成率显著高于1 μmol/L组和3μmol/L组(P＜0.05),所分离的细胞AKP染色呈阳性,Oct4、Nanog和Sox2的免疫荧光染色均显阳性,具有ES细胞的特点.结果表明,ESC-SR培养液中SC1可以替代LIF用于小鼠ES细胞未分化状态的维持,并且可以在无饲养层条件下进行昆明小鼠ES细胞的培养. 相似文献
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Rassnick KM Gieger TL Williams LE Ruslander DM Northrup NC Kristal O Myers NC Moore AS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(3):196-199
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
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Davis MS Willard MD Nelson SL Mandsager RE McKiernan BS Mansell JK Lehenbauer TW 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(3):311-314
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
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Furosemide continuous rate infusion in the horse: evaluation of enhanced efficacy and reduced side effects 总被引：1，自引：0，他引：1
Johansson AM Gardner SY Levine JF Papich MG LaFevers DH Fuquay LR Reagan VH Atkins CE 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):887-895
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
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Waruiru RM Thamsborg SM Nansen P Kyvsgaard NC Bogh HO Munyua WK Gathuma JM 《Tropical animal health and production》2001,33(3):173-187
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
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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
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Evaluation of biohydrogenation rate of canola vs. soya bean seeds as unsaturated fatty acids sources for ruminants in situ 
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下载免费PDF全文 S. Pashaei T. Ghoorchi A. Yamchi 《Journal of animal physiology and animal nutrition》2016,100(2):211-216
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
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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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正We are pleased to publish the second special issue on avian brood parasitism and to be responsible guest editors for the two special issues of Chinese Birds (Vol. 3, No. 4, 2012 and Vol. 4, No. 1, 2013), entitled "Avian Brood Parasitism - A Growing Research Area in Behavioral Ecology". The first issue was published in December 2012. The goal of the two special issues is to publish accumulated knowledge and some of the recent developments in 相似文献
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Tropical Animal Health and Production - 相似文献