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《中国兽医学报》2016,(11):1869-1874
为筛选鸡源志贺菌IpaC蛋白的受体。利用生物素标记试剂盒标记IpaC蛋白,分离培养原代鸡肠上皮细胞和。利用ProteoExtract?天然膜蛋白提取试剂盒提取鸡肠上皮细胞的膜蛋白;应用免疫沉淀、免疫磁珠法分离富集与IpaC蛋白结合的蛋白质;利用SDS-PAGE电泳检测和Western blot鉴定。结果获得了与IpaC蛋白特异性结合的大约在34 000~55 000之间的蛋白条带。筛选得到的SDS-PAGE蛋白条带进行LC-MS/MS测序鉴定和生物信息学分析。初步将annexin A2,37 000Laminin receptor precursor,LIM and SH3protein 1,ras-related protein Rab-43作为IpaC蛋白受体的候选蛋白。为研究志贺菌在鸡体内的致病机制奠定基础,而且可以为评估鸡源志贺菌在公共卫生方面的重要性提供参考依据。 相似文献
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用杆状病毒表达系统表达虾源副溶血性弧菌编码蛋白PirB的重组蛋白,用SDS-PAGE、Western blot对其进行鉴定,纯化后的PirB重组蛋白免疫Balb/c小鼠后进行细胞融合,通过间接ELISA方法筛选阳性杂交瘤细胞,用ELISA方法对单克隆抗体进行测定。结果发现,共筛选到7株能够稳定分泌抗PirB蛋白特异性单克隆抗体的杂交瘤细胞,小鼠腹水的效价最高效价达到1∶2.56×106,制备的单克隆抗体可以特异性识别PirB蛋白,表明成功制备了虾源副溶血性弧菌PirB蛋白单克隆抗体,为虾源副溶血性弧菌引发的疾病诊断奠定了基础。 相似文献
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研究旨在制备DRV p18蛋白单克隆抗体。试验通过原核表达并纯化DRV p18重组蛋白,经BCA蛋白浓度测定后免疫BALB/c小鼠;通过细胞融合技术制备杂交瘤细胞,获得的p18单克隆抗体通过ELISA、IFA和Western blot试验进行鉴定,并将杂交瘤细胞腹腔注射小鼠获得单抗腹水,通过Western blot试验验证其特异性。结果显示：纯化的重组p18蛋白浓度为1.37 mg/mL,经过三轮亚克隆获得4株分泌单克隆抗体的杂交瘤细胞株1E3、2C4、4A2和4D4,亚型鉴定1E3和4D4重链为IgG1型、2C4重链为IgM型、4A2为IgG2b型,轻链均为κ型;4株单克隆抗体均能使感染DRV的BHK-21细胞发出特异性荧光,并在18 ku处存在特异性条带;4D4腹水ELISA效价为1∶409 600,Western blot效价达1∶102 400,IFA效价为1∶51 200;4D4与DRV反应,而不与其他禽源常见病毒反应。研究成功制备了抗DRV p18蛋白的单克隆抗体,为进一步研探究p18蛋白的功能奠定基础。 相似文献
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Toll样受体3(TLR3)是激发机体天然免疫的模式识别受体,为了制备能与天然结构的鸡TLR3(chTLR3)蛋白结合的单克隆抗体,将前期构建的可以在细胞内表达的真核重组质粒pVAX1-Igk-chTLR3免疫BALB/c小鼠,采用杂交瘤技术制备抗chTLR3单克隆抗体;并应用该抗体采用Western blot、流式细胞术及间接免疫荧光技术检测镉中毒雏鸡外周血淋巴细胞与脾内chTLR3的表达变化。结果发现,获得1株阳性杂交瘤细胞,该细胞株单个细胞染色体数量为(94±2)条,细胞上清效价为1∶25,抗体亚类鉴定为IgG3,细胞上清能够与原核表达的chTLR3胞外区蛋白及鸡外周血淋巴细胞中的chTLR3特异性结合。应用此抗体采用Western blot、流式细胞术及间接免疫荧光技术均能够在对照组和染镉组雏鸡外周血淋巴细胞及脾内检测到chTLR3的蛋白表达。结果表明,成功制备了具有天然活性的chTLR3单克隆抗体,该抗体可用于Western blot、间接免疫荧光技术及流式细胞术研究chTLR3在鸡组织细胞的分布定位、表达变化,为示踪chTLR3蛋白分布、表达及研究其在鸡发病机制中的作用提供了重要的物质基础。 相似文献
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为制备猪繁殖与呼吸综合征病毒(PRRSV)GP5蛋白单克隆抗体,首先构建猪PRRSV GP5基因的真核重组表达载体pCDNA-GP5,将其作为免疫原,对Balb/c小鼠进行免疫。取免疫4次后的小鼠脾细胞与骨髓瘤细胞SP2/0进行融合。构建PRRSV GP5基因的原核重组表达载体pGEX-6P-GP5,将其转化至大肠埃希菌Rosetta(DE3)并诱导表达。以表达的原核蛋白GP5作为单克隆抗体的筛选抗原,通过间接ELISA进行杂交瘤细胞株的检测和筛选。本研究成功构建了GP5基因的真核重组表达载体pCDNA-GP5,表达并纯化了GP5蛋白。经2~3次亚克隆后获得3株针对GP5蛋白的杂交瘤细胞株,IFA和Western blot对3株杂交瘤细胞株分泌的单克隆抗体进行了鉴定。GP5蛋白单克隆抗体的成功研制,为进一步建立特异性PRRSV检测方法奠定了基础。 相似文献
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为制备抗鸡传染性喉气管炎病毒(ILTV)糖蛋白gD的单克隆抗体(MAb),本研究通过原核表达gD重组蛋白,纯化后免疫6周龄雌性BALB/c小鼠,经细胞融合筛选获得一株稳定分泌抗ILTV gD蛋白的杂交瘤细胞株,MAb亚型经鉴定为IgG1,轻链为κ链。Western blot结果显示,这株杂交瘤细胞分泌的MAb能够识别ILTV。ILTV gD蛋白的MAb的制备,为ILTV检测方法的建立奠定了基础。 相似文献
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为制备抗流产嗜性衣原体MIP蛋白单克隆抗体,以纯化的重组MIP蛋白为抗原,免疫Balb/c小鼠后经细胞融合,间接ELISA法筛选阳性细胞克隆并进行有限稀释克隆化,建立了两株分泌抗MIP蛋白单克隆抗体的杂交瘤细胞株,将其分别命名为M1,M2。间接ELISA测杂交瘤细胞上清抗体效价为1∶1600、相对亲和力为10μg/m L;Western blot鉴定两株单克隆抗体能特异识别MIP重组蛋白;细胞核型实验鉴定单抗符合杂交瘤细胞的特性;单克隆抗体亚类检测试剂盒鉴定两株单抗免疫球蛋白类型均为Ig G1,轻链为κ链;体外中和试验表明,两株单抗均能有效阻断感染。抗MIP单克隆抗体的成功制备将为建立诊断、治疗方法及MIP蛋白的进一步研究奠定基础。 相似文献
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《中国动物传染病学报》2015,(5)
将鸭疫里默氏杆菌的pfs基因进行原核表达,重组蛋白经纯化后作为抗原免疫BALB/c小鼠。经过3次免疫后,取免疫小鼠脾细胞与SP2/0骨髓瘤细胞进行细胞融合,利用间接ELISA方法筛选阳性杂交瘤细胞株。通过间接ELISA法测定腹水效价、Western blot法检测其免疫反应性,并鉴定抗体的亚型。重组蛋白SDS-PAGE检测结果验证得到26 k Da Pfs蛋白,免疫小鼠后最终获得1株阳性杂交瘤细胞株,命名为2E2E6,为Ig G1亚类,间接ELISA法检测腹水效价为1:64 000。Western blot结果表明制备的单克隆抗体具有良好的免疫反应性。本研究成功制备了Pfs的单克隆抗体,为进一步研究Pfs在鸭疫里默氏杆菌中的作用提供了参考。 相似文献
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为制备抗A型塞内卡病毒(SVA)VP1蛋白的单克隆抗体,并初步应用于A型塞内卡病毒的检测,本研究构建了SVA VP1原核重组表达质粒pET30a-GST-VP1(528 bp)。将重组质粒转化大肠埃希菌BL21感受态细胞并大量表达VP1重组蛋白,利用纯化的VP1重组蛋白免疫BALB/c小鼠,取其脾细胞与骨髓瘤细胞(SP2/0细胞)进行融合,经过细胞亚克隆筛选,获得杂交瘤细胞。将其选为腹水生产细胞株,最后纯化单克隆抗体,通过Western blotting和间接免疫荧光试验对其进行鉴定。结果显示,本研究获得1株能够稳定分泌抗VP1重组蛋白单克隆抗体的杂交瘤细胞,其亚型重链为IgG2a、轻链为Kappa链;Western blotting和间接免疫荧光检测显示,该单克隆抗体能够特异性识别SVA病毒粒子。本研究成功制备的抗SVA VP1蛋白单克隆抗体可为进一步研究A型塞内卡病毒VP1蛋白的生物学功能及A型塞内卡病毒致病机制提供有效途径。 相似文献
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《黑龙江畜牧兽医》2016,(19)
为使鸡源志贺氏菌IpaC蛋白保持天然的生物学活性,在毕赤酵母表达系统中实现分泌表达,进一步研究IpaC蛋白的生物学功能,本研究在不改变IpaC蛋白氨基酸序列的情况下,根据酵母密码子偏爱性优化合成IpaC#基因,利用真核表达载体p GAPZA和8种真核信号肽,分别构建真核表达载体pGAPZA-Inu/Inv/Kil/Lys/Mat/Amy/Glu/Ser-IpaC#,然后将线性化的重组质粒电转化至毕赤酵母X-33中,对阳性转化子进行表达,并用SDS-PAGE及Western-blot检测其表达产物。结果表明:在8种重组菌表达产物的菌体沉淀中检测到大小约为60 ku的目的蛋白。说明鸡源志贺氏菌IpaC基因成功实现了在毕赤酵母的胞内表达。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献