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1.
TGEV-PL株在PK15细胞上增殖,经浓缩纯化获得TGEV抗原,建立了间接ELISA检测方法.应用杂交瘤技术获得3株分泌抗猪传染性胃肠炎病毒(TGEV)单克隆抗体(McAb)杂交瘤细胞.经检测其分泌的抗体亚类为IgG3;杂交瘤细胞染色体数为88;间接ELISA检测细胞培养上清液效价为1∶256,腹水抗体效价达1∶6×104,与6株毒(菌)株的抗原之间无交叉反应.经阻断试验证实,其分泌的McAb能识别抗原是TGEV所特有的抗原决定基.  相似文献   

2.
猪伪狂犬病毒gE蛋白单克隆抗体制备与鉴定   总被引：2，自引：0，他引：2  
为获得猪伪狂犬病毒(PRV)gE蛋白单克隆抗体,选择原核表达的重组gE蛋白免疫6周龄BALB/c雌性小鼠,将其脾细胞与SP2/0进行融合,经间接ELISA筛选阳性杂交瘤细胞,结果获得了2株能稳定分泌抗PRV gE蛋白的杂交瘤细胞,命名为E3B8和E5C11。间接ELISA检测2株杂交瘤细胞的培养上清液抗体效价为1∶6.4×10~3,腹水的抗体效价分别达到1∶3.28×10~6和1∶6.55×10~6。2株杂交瘤细胞的染色体数分别为105和108。E3B8亚类鉴定重链为IgG1,轻链为κ链;E5C11亚类鉴定重链为IgG2b,轻链为κ链。Western blot检测显示2株单克隆抗体腹水均能与PRV重组gE蛋白发生特异性反应,间接免疫荧光试验(IFA)检测显示2株单克隆抗体均能与PRV分离毒株感染的BHK-21细胞发生特异性反应,交叉反应性检测显示2株单克隆抗体与常见病毒不发生交叉反应。表明制备的2株gE蛋白单克隆抗体效价高、特异性强,为gE蛋白结构与功能分析以及PRV免疫诊断试剂盒的开发奠定了基础。  相似文献   

3.
为制备针对犬细小病毒(CPV)的单克隆抗体,以纯化的CPV免疫BALB/c小鼠,3次免疫后,取其脾细胞与SP2/0细胞进行细胞融合。利用超速离心纯化的病毒作为包被抗原,采用间接ELISA方法筛选阳性杂交瘤细胞,获得3株能稳定分泌单克隆抗体的杂交瘤细胞株,分别命名为1D9、3G9和4F6。单克隆抗体细胞培养上清效价为1∶64、1∶64、1∶128,腹水效价为1∶10~4、1∶10~4、1∶10~5。3株杂交瘤细胞的染色体数分别为92、94、98。亚类鉴定结果显示1D9和3G9重链为IgG1,4F6重链为IgG2b,轻链均为kappa链。病毒中和试验表明,单克隆抗体4F6对CPV具有明显的病毒中和活性。交叉试验表明,3株单克隆抗体均可与CPV特异性结合,与其他犬类常见病毒无交叉反应。本研究制备的单克隆抗体为CPV的检测及其感染动物的治疗提供了物质基础。  相似文献   

4.
本研究采用戊二醛一步法制备免疫抗原FB1 KLH和包被抗原FB1 BSA ,免疫BALB/c小鼠 ,建立间接酶联免疫吸附法 (I ELISA)并测定血清效价。结果表明 :FB1 BSA最适包被浓度为 1μg/ml,抗体最适稀释度为 1∶10 0 0 0 ,血清效价可达 1∶12 80 0 0。第 4次免疫后 ,通过淋巴细胞杂交瘤技术建立分泌FB1单克隆抗体的杂交瘤细胞株 ,融合率为 96 % ,阳性率为 98%。细胞上清抗体ELISA效价为 1∶3 2× 10 6,腹水抗体效价为 1∶8× 10 8。经鉴定 ,该株单抗的亚类为IgG1,分子量为 185 4KDa ,染色体数目介于 96～ 10 4之间 ,亲和常数为 1 16× 10 7M-1,与另三种常见的真菌毒素 (串珠镰刀菌素 ,T 2毒素 ,玉米赤霉烯酮 )和两种载体蛋白 (牛血清白蛋白 ,血蓝蛋白 )无交叉反应 ,稳定性良好  相似文献   

5.
抗氯霉素单克隆抗体的制备及鉴定   总被引：16，自引：3，他引：13  
用人工合成的氯霉素-人血清白蛋白(CAP-HSA)作抗原免疫BALB/c小鼠,通过杂交瘤技术建立了1株分泌抗CAP单克隆抗体(McAb)的杂交瘤细胞1F9.经检测,其分泌的抗体亚类为IgG1,杂交瘤染色体数目84～96条,间接ELISA检测细胞培养上清效价为1256,诱生小鼠腹水的抗体效价可达16×105.该细胞连续培养生物学性状稳定,竞争间接酶联免疫吸附试验(ciELISA)显示,其与供试抗生素交叉反应小,表明该单抗具有较大的应用价值.  相似文献   

6.
赤羽病毒单克隆抗体的研制及鉴定   总被引：2，自引：2，他引：0  
用纯化的赤羽病毒（akabane virus,AKAV）免疫Balb/c小鼠,取小鼠脾细胞和骨髓瘤细胞SP2/0融合,经间接ELISA筛选和3次有限稀释法克隆,得到2株能稳定分泌抗赤羽病毒单克隆抗体（McAb）的杂交瘤细胞株,分别命名为AKAV McAb 3A株和2C株。ELISA试验和中和试验结果表明,本研究制备的2株McAb均具有良好的特异性,为AKAV阳性,杂交瘤细胞培养上清液抗体的效价分别为1∶640和1∶320,腹水的效价分别为1∶256000和1∶128000,亲和常数（Ka）分别为1.16×10-9和6.31×10-8 mol/L,3A株的相对亲和力大于2 C株,具有病毒中和活性,中和效价分别为1∶64和1∶32,其IgG亚类为IgG1,轻链的亚型均为kappa型,2株细胞冻存3次复苏后仍能稳定分泌抗体,表明AKAV McAb制备成功,为赤羽病快速诊断方法的研究奠定了基础。  相似文献   

7.
将石房蛤毒素（Saxitoxin,STX）与牛血清白蛋白(BSA)偶联构建完全抗原STX-BSA,免疫BALB/c小鼠,通过杂交瘤技术获得1株稳定分泌抗STX单克隆抗体的杂交瘤细胞株,单抗亚类为IgM。体内诱生法收集腹水单抗,间接ELISA方法测定抗体效价为1∶102400,抗体亲和常数为3.71×106 L/mol。  相似文献   

8.
为获得新城疫病毒（Newcastle disease virus,NDV） M蛋白单克隆抗体,本研究将编码该蛋白的基因克隆、表达并纯化重组蛋白,作为免疫原免疫小鼠,同时建立ELISA筛选方法对小鼠血清效价进行测定,筛选出血清抗体效价最高的小鼠脾细胞与SP2/0细胞融合,最终获得能稳定产生NDV M蛋白单克隆抗体的杂交瘤细胞株,并进行了抗体的免疫荧光、Western blotting、亚类的鉴定、杂交瘤细胞染色体计数、小鼠腹水制备及腹水内单克隆抗体效价测定。结果显示,PCR、重组质粒测序及双酶切鉴定正确,M基因大小约为1 095 bp。SDS-PAGE和Western blotting检测显示,试验成功表达了重组M蛋白,分子质量约为60 ku,且可与NDV阳性血清反应。建立的ELISA筛选方法中,重组M蛋白、His标签蛋白和抗体的最佳工作浓度分别为0.5 μg/mL、0.5 μg/mL和1∶256 000。抗体的免疫荧光、Western blotting、亚类的鉴定显示,杂交瘤细胞产生的抗体可与NDV SG10株及重组M蛋白特异性结合,其轻链为κ,重链为IgG2A。C9-G2、D3-F2杂交瘤细胞染色体计数结果分别为97和101条;杂交瘤细胞上清的ELISA检测效价均为1∶6 400,腹水的ELISA检测效价分别为1∶409 600和1∶102 400。本研究成功制备了NDV M蛋白的单克隆抗体,可为进一步研究M蛋白的功能提供工具。  相似文献   

9.
用纯化的O型口蹄疫泛亚毒株免疫BALB/c小鼠,取免疫小鼠脾细胞与SP 2/0骨髓瘤细胞进行融合,经3次克隆和间接EL ISA筛选,获得了ⅢA 11、ⅢC 3和ⅢF 10 3株稳定分泌单克隆抗体的杂交瘤细胞株。通过间接EL ISA测定,单抗效价为:细胞培养上清1∶160~1∶640,腹水为1∶5×104~1∶4×105;经EL ISA法测定,3株单克隆抗体均与泛亚株VP 1蛋白反应,而不与A型口蹄疫病毒VP 1蛋白反应;单抗的亚类鉴定结果表明,ⅢA 11和ⅢF 10分泌的抗体为IgG 1亚类,ⅢC 3分泌的抗体为IgG 2b亚类。单克隆抗体抗原识别位点分析结果表明,ⅢA 11与另外2种单克隆抗体的识别位点不同,而ⅢC 3和ⅢF 10的识别位点相近。  相似文献   

10.
抗水牛伊氏锥虫变异表面糖蛋白抗原单克隆抗体的研制   总被引：1，自引：0，他引：1  
用纯化的伊氏锥虫变异表面糖蛋白（variant surface glucoprotein, VSG）免疫BALB/c小鼠,取免疫小鼠脾细胞与SP2/0骨髓瘤细胞进行融合,经过3次克隆和间接ELISA方法筛选,获得3D7、5B9 2株稳定分泌单克隆抗体的杂交瘤细胞株,用间接ELISA方法检测杂交瘤细胞培养液上清效价和小鼠腹水效价,其中细胞培养上清效价分别为1∶6400和1∶12800,腹水效价分别为1∶105和1∶106。单抗的亚型鉴定结果表明,3D7、5B9分泌的抗体都为IgG1亚类κ链。  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.
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   

18.
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   

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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