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1.
为克隆版纳微型猪近交系血管内皮生长因子(VEGF)基因并检测该基因在各组织中的转录水平,本研究提取版纳微型猪近交系18种组织RNA,利用RT-PCR方法扩增VEGF基因编码区全长序列,进行克隆测序。利用VEGF基因序列的推导氨基酸序列与牛等8个物种的VEGF氨基酸序列构建物种系统进化树,同时采用半定量RT-PCR方法分析VEGF基因在版纳微型猪近交系18种组织中的转录水平。结果显示,版纳微型猪近交系VEGF基因编码区全长573 bp,编码190个氨基酸。氨基酸序列同源性分析表明,与牛等8个物种具有90%以上的相似性,分子系统进化表明其序列与人的关系最近,其次为牛、羊和兔。多组织半定量RT-PCR研究表明VEGF mRNA在版纳微型猪近交系的18个组织中均有转录水平的表达,其中在卵巢、脾脏、心脏、肺脏及皮肤中表达量较高,其他组织中表达量略低。  相似文献   

2.
UBE2b基因编码的泛素结合酶参与的泛素-蛋白酶通路(UPP)在哺乳动物精子发生中起着重要作用。本研究根据相关ESTs拼接的序列采用PCR扩增鉴定的方法获得梅山猪UBE2b基因cDNA全序列,对其序列进行生物信息学分析,利用半定量RT-PCR的方法研究150日龄梅山公猪UBE2b基因的组织表达特征和不同日龄(2、30、60、90、150日龄)公猪睾丸的表达规律。结果表明:梅山猪UBE2b基因cDNA全长1 329 bp,编码153个氨基酸,具有UBCc家族的保守结构域。该基因编码氨基酸序列在不同物种间具有较高的保守性,根据编码氨基酸序列构建的分子进化树显示猪与牛的亲缘关系最近,与斑马鱼的关系最远。UBE2b基因在梅山公猪各组织中广泛表达,其中睾丸为高丰度表达。该基因在梅山猪睾丸中的表达随日龄增加呈显著上升趋势,与睾丸发育显著相关(r=0.82,P<0.01),推测UBE2b可能在梅山猪精子发育和性发育中起重要作用。  相似文献   

3.
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4.
利用辐射杂种克隆板对猪NDUFS2(NADH dehydrogenase(ubiquinone)Fe-S protein 2)基因进行了染色体定位,克隆了该基因的CDS序列,用相关软件进行了基因结构和功能预测,并利用半定量RT-PCR对基因的组织表达谱进行了分析。研究结果表明:NDUFS2基因定位于猪的4号染色体SSC4q,与标记SW589紧密连锁。获得NDUFS2基因的CDS为1 392 nt,编码463个氨基酸。物种间系统进化树分析表明:猪与牛的NDUFS2基因序列同源性更高。结构预测发现猪NDUFS2基因具有一个NuoD保守结构域,与能量的产生和转化功能有关。根据组织表达谱分析结果,NDUFS2在猪的11种组织中的表达量有差异。  相似文献   

5.
为了研究SLC36A1基因的功能及其与梅山猪毛色等表现的关系,试验以梅山猪皮肤组织cDNA为模板,PCR扩增SLC36A1基因完整CDS序列,利用生物信息学方法分析SLC36A1基因CDS序列及其编码的氨基酸序列,用RT-PCR方法检测SLC36A1基因在梅山猪各组织中的相对表达量。结果表明:SLC36A1基因CDS全长为1 431 bp,编码476个氨基酸,属于跨膜疏水性蛋白,具有转运功能,是比较保守的基因;RT-PCR检测该基因在梅山猪雄性生殖系统及肾脏中有较高的表达量,在肝脏、肌肉、子宫、输卵管等组织中表达量很低,并且首次发现该基因在尿道球腺中有最高的表达量。  相似文献   

6.
猪ADSL基因克隆及其在部分组织中的mRNA定量表达   总被引：1，自引：1，他引：0  
试验以通城猪为研究对象,在对猪ADSL基因全长编码区cDNA片段进行克隆、序列测定、与GenBank中已收录的其他14种动物的ADSL全长编码区序列进行同源性分析,并构建系统发生树的基础上,采用实时(相对)定量PCR方法对刚出生和65日龄两个不同生长发育时期的通城猪心、肝、肾脏、背最长肌4种组织的ADSL基因表达谱进行分析。结果表明,所克隆的ADSL基因片段大小为1 548 bp(GenBank登录号:GU249574),其中包含一长为1 455 bp的完整阅读框,通过核酸序列分析发现,该基因编码484个氨基酸;与GenBank中已收录的猪ADSL基因序列同源性最高,达99.9%;与恒河猴和黑猩猩的序列同源性最低,分别为66.3%和41.3%;15种动物的20条ADSL全长CDS序列聚类分布为两个主支。刚出生时的通城猪ADSL基因在心、肝、肾脏组织的mRNA表达水平均高于65日龄通城猪的心、肝、肾脏组织中的mRNA表达;然而,其背最长肌的ADSL基因mRNA表达水平则低于65日龄的通城猪。本结果为猪ADSL基因的生物学功能研究和遗传进化研究提供了分子依据。  相似文献   

7.
为了进一步了解鹿源DCN基因的结构与功能,揭示该基因在鹿茸尖端不同组织层的表达规律,本研究从梅花鹿鹿茸尖端组织cDNA文库中首次克隆具有完整编码区的DCN基因全长cDNA序列,并结合生物信息学方法和实时荧光定量RT-PCR技术对该基因的氨基酸序列结构和表达特征进行分析.结果表明,梅花鹿DCN基因cDNA全长为1 831 bp,编码360个氨基酸;其编码蛋白具有N端信号肽,相对分子质量为39.9 ku,理论等电点为8.8,其一级结构中亮氨酸所占比例最高(12.5%);梅花鹿与绵羊DCN氨基酸序列的相似性最高(98%).实时荧光定量RT-PCR分析表明,DCN在间充质层的表达显著高于其他3层组织,提示DCN的抗纤维化活性可能是维持鹿茸间充质层快速生长的重要调节因素.  相似文献   

8.
为了探究滩羊卷曲被毛时空变化特征,本研究运用基因克隆技术对滩羊FGF21基因的编码区全长序列进行克隆测序,利用生物信息学方法进行序列分析,并对FGF21基因在滩羊不同生长时期皮肤中的表达模式进行分析。结果表明:滩羊FGF21基因的CDS区有1个630 bp的开放阅读框,编码209个氨基酸,其编码蛋白分子量和理论等电点分别为22645.8 ku和6.08 ku,该蛋白不存在跨膜结构,为膜外蛋白,且属于亲水性蛋白;二级结构由α-螺旋、延伸、β-折叠及无规则卷曲4种结构组成;滩羊FGF21基因序列与山羊、牛等物种间同源性较高,所构建系统发生树与其物种同源性关系吻合。半定量RT-PCR分析FGF21基因在滩羊不同组织中分布发现,FGF21仅在肝脏、肺脏、胃和皮肤中表达,在皮肤中表达量低于在肝脏中的表达量,但高于在胃中的表达量;不同时期滩羊皮肤组织荧光定量PCR结果显示,FGF21基因在幼龄组(1月龄)滩羊皮肤中表达量极显著高于成年组(48月龄)表达量(P0.01),表明FGF21基因有可能是调控滩羊皮肤被毛卷曲差异的候选基因之一。本研究将为滩羊毛发生长的生物学机制研究提供一定的参考价值。  相似文献   

9.
为探究钙蛋白酶抑制蛋白(CAST)基因在从江香猪组织中的时序表达规律,实验采用实时荧光定量PCR技术检测1、3、6、9、12月龄从江香猪心肌、肝脏、骨骼肌、背最长肌和脂肪5个组织中CAST基因mRNA的表达情况,并采用RT-PCR方法对贵州从江香猪CAST编码区基因进行克隆。结果表明:CAST基因在不同年龄阶段从江香猪的不同组织中均有表达,在幼龄阶段从江香猪的肝脏中CAST基因的表达量极显著低于其他组织,成年后CAST基因在心脏、骨骼肌、背最长肌中的表达量显著增加;6月龄时在心脏中的表达量极显著高于其他组织,9月龄和12月龄在骨骼肌中的表达量极显著高于其他组织,在脂肪中的表达量一直较低;CAST基因在3月龄和12月龄时各组织表达量均较低,在1月龄、6月龄和9月龄时各组织表达量均较高。本研究结果说明CAST基因对从江香猪肌肉剪切力及嫩度具有一定的调控作用。  相似文献   

10.
《畜牧与兽医》2017,(4):19-23
为探究FoxO4基因序列和组织表达特征,采用RT-PCR法从猪肝脏中克隆FoxO4基因c DNA的部分序列,采用荧光定量PCR对大白猪、从江香猪2个猪品种的不同组织m RNA表达进行了相对定量分析。结果:获得猪FoxO4基因615 bp编码区序列;FoxO4基因m RNA在大白猪所检测的9个组织样中均有表达,在肺中表达量最高,在脂肪中表达量次之;FoxO4基因m RNA在从江香猪所检测的9个组织样中也均有表达,在脂肪中表达量最高,在肺中表达量次之;在2个品种中FoxO4基因在肺、肾、大肠、脂肪中m RNA表达水平差异极显著(P0.01)。  相似文献   

11.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。  相似文献   

12.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal (GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April 2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes. But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia.  相似文献   

13.
Tropical Animal Health and Production -  相似文献   

14.
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   

15.
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   

16.
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   

17.
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   

18.
Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded.  相似文献   

19.
The objective of this report was to characterize 20-year changes in proportion of calcium oxalate (CaOx) calculi and struvite calculi in dogs, and associations with breed, age, and sex. In this retrospective study, results of analysis of urinary calculi from dogs were reviewed for specimens received between July 1, 1981, and December 31, 2001. Breed, sex, age, year of submission of the specimen, and mineral type(s) were analyzed statistically. CaOx or Struvite or both were contained in 18,966 of 20,884 (91%) specimens. For both sexes, a 20-year statistically significant increase was observed in the proportion of calculus specimens that contained CaOx. The increase in this proportion was greater in females (1% to 31%) than in males (18% to 82%). From 1998 to 2001, when proportions may have plateaued, the odds of specimens containing CaOx were markedly higher in 18 breeds, markedly lower in 5 breeds, and not significantly different in 13 breeds compared with crossbreds. For both sexes, a 20-year statistically significant decrease was observed in the proportion of calculus specimens that contained struvite. This decrease in proportion was greater for males (79-16%) than for females (97-68%). From 1998 to 2001, when proportions plateaued, the odds of calculi containing struvite were markedly lower in 20 breeds, markedly higher in 1 breed, and not significantly different in 15 breeds when compared with crossbreds. Breed, age, and sex were associated statistically with CaOx or struvite urolithiasis. In conclusion, there appears to have been a long-term increase in the proportion of specimens of canine urinary calculi that contain CaOx as well as a long-term decrease in the proportion of specimens of calculi that contain struvite for both male and female dogs. The rate of change appeared to begin leveling off in the period 1998 to 2001. The recent proportion of dogs with either CaOx- or struvite-associated urolithiasis may depend on breed, age, and sex, and on interactions among these 3 factors.  相似文献   

20.
<正>1.INTRODUCTION Ensuring transportation network security is one Of the most daunting challenges confronting homeland security agencies today.Significant research has been dedicated.To model and analyze the vulnerability of transportation systems,while notably fewer studies propose specific strategies for deploying defensive technologies to safeguard these systems.  相似文献   

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