鸡卵黄抗体IgY研究进展

鸡卵黄抗体(immunoglobulin of egg yolk,IgY)是卵黄中存在的免疫球蛋白,是由鸡血液中的IgG经过受体介导转移至卵黄中的球蛋白,对新生个体具有重要的保护作用。IgY因具有一些特殊结构和生物学性质,在某些疾病的防治中有着比哺乳动物IgG等更大的优势,从而被称为一种新生代抗体。本文就近些年来对鸡卵黄IgY理化特性、分离纯化方法、受体以及其在一些疾病防治中应用的研究作一概述。     

鸡抗传染性法氏囊病卵黄抗体的ELISA及琼脂扩散检测

鸡传染性法氏囊病(IBD)是目前危害养鸡业的主要疾病之一。卵黄抗体(IgY)是母鸡血清中的IgG转移至卵黄中并积累形成，且与血清中抗体水平相当，因此通过检测卵黄抗体可监测鸡群的抗体水平，为鸡传染性疾病(如：IBD、新城疫、禽流感等)免疫程序的建立提供参考。研究使用间接ELISA(酶联免疫吸附试验)快速检测卵黄抗体的方法，同时对卵黄抗体的生产制备具有指导意义。     

东乡绿壳蛋鸡卵黄与血清中IgY水平相关性研究

鸟类血清和卵黄中的总卵黄免疫球蛋白Y(IgY)含量可以作为健康状态的一个标志,同时卵黄抗体也是生物制药的重要材料。为了阐明鸡卵黄抗体和血清抗体总量的关系,以30只43周龄单笼饲养的东乡黑羽绿壳蛋鸡为试验动物,采集每只鸡的翅下静脉血样以及其所对应的鸡蛋,分离出血清并制备IgY样品。通过间接ELISA的方法对卵黄与血清中的总IgY水平进行了检测,并分析了两者之间的Pearson相关。结果表明:卵黄中总IgY水平与血清中总IgY水平之间具有显著的相关性(r=0.619;P0.01)。研究结果为通过检测血清中的IgY水平来对卵黄中IgY水平或者后代的获得性免疫水平进行预测提供了一个重要参数。     

卵黄抗体在猪生产中的应用

卵黄抗体(IgY)是蛋鸡受特定抗原刺激后体内产生的特异性并被转移和贮存在卵黄中的免疫球蛋白。用鸡卵黄大量生产和制备多克隆抗体是近年来抗体制备技术中新兴的研究领域。介绍了IgY的结构和进入卵黄的机制,综述了免疫鸡卵黄抗体在猪生产中的应用及其制备技术的研究进展。     

卵黄抗体在防治仔猪腹泻病中的应用

卵黄抗体(IgY)是使用抗原免疫禽类后,从禽蛋中提取出来的针对特定抗原的抗体,是具有较强免疫功能的蛋白质。由于卵黄抗体具有性质稳定、高产量、低成本等优势,目前已广泛应用于畜禽疾病的治疗中。本文主要介绍了卵黄抗体在仔猪细菌性腹泻和病毒性腹泻等疾病防治中的应用。     

卵黄抗体在动物疾病防治上的应用进展

卵黄抗体是当今生物科学研究领域的一项重大发现。母鸡以特定抗原免疫后,能产生相对应的特异性抗体,并将其有效地储存在卵黄中。卵黄中的免疫球蛋白G(IgG)称卵黄抗体,又名lgY,自Williams等(1962)发现卵黄抗体以来,IgY以其取材方便,制作简单,价格便宜等优点,广泛应用于动物疾病的诊断、预防和治疗。1IgY的性质IgY的性质与哺乳动物的IgG相似。正常鸡的IgY的分子量约为180KDa,由两条轻链(2L)和两条重链(2H)组成,分子量分别为60～70KDa和22～30KDa。其等电点约为5.2。IgY具有良好的耐热能力。在低于75℃条件下,IgY具有良好的热稳定性…     

卵黄抗体不同提取方法的比较

卵黄抗体(egg yolk antibodies,IgY)是指鸡、鸭、鹅等蛋禽卵黄中存在的抗体,也称卵黄免疫球蛋白(egg yolk immunoglobulins,IgY)[1].从含高效价抗体的禽蛋黄中提取、制备的IgY在人类和动物疾病的防治中具有特效作用.IgY具有均一性好,对热、酸和碱稳定性好等优点.蛋黄含有丰富的营养物质,是细菌生长的良好培养基,易使蛋黄抗体腐败变质.因此,精制蛋黄抗体的大规模工业化生产必须解决提取纯化这一关键难题.试验比较了4种成本低和提取率高的提取方法,以期得到理想的IgY提取方法,为今后的生产实践提供科学的依据.     

卵黄抗体IgY在猪生产中的应用

卵黄抗体(YolkImmunoglobulin,IgY)是蛋鸡受特定抗原刺激后体内会产生特异性并被转移和贮存在卵黄中的免疫球蛋白。用鸡卵黄大量生产和制备多克隆抗体是近年来抗体制备技术中新兴的研究领域。IgY可作为替代抗生素的新型绿色饲料添加剂。本文就免疫鸡卵黄抗体在猪生产中的应用作一综述。     

鸡卵黄抗体及其在肉鸡生产中的应用

<正>卵黄抗体(immunoglobulin of egg yolk,IgY)又称卵黄免疫球蛋白(Egg yolk immunoglobulin),是特异性抗原刺激禽类后,由机体内B淋巴细胞产生并移行至卵黄中的特异性抗体,大多数为IgG。目前研究最多、应用最广范的是鸡IgY。鸡IgY生物学优势明显,具有强大的免疫学功能,且鸡蛋具有价格便宜、收集便捷及均一稳定等优点,已被广泛应用于生物制品、兽医临床以及饲料生产等多个领域,在动物     

卵黄抗体纯化和浓缩的研究进展

卵黄抗体(immunoglobulin of egg yolk,IgY)是禽卵黄中存在的免疫球蛋白,是由禽血液中的IgG转移至卵黄中产生的对子代具有保护性作用的抗体。IgY的分子质量约为180 ku,由2条轻链和2条重链组成,其中轻链分子质量为22～30 ku,重链分子质量为67～70 ku,等电点接近5.2。与IgG相比,IgY具有动     

Passive protection of dogs against clinical disease due to Canine parvovirus-2 by specific antibody from chicken egg yolk

The protective effect of immunoglobulins derived from chicken egg yolk (IgY) against infection by Canine parvovirus 2 (CPV-2) was evaluated in 10 beagle dogs orally challenged with a strain of the virus. The 2-mo-old dogs were divided into 3 groups and treated with powders containing CPV-2 IgY or normal egg yolk for 7 d after the challenge. The 4 dogs receiving normal egg yolk (control group) demonstrated mild symptoms typical of CPV-2 infection, such as vomiting, diarrhea, and weight loss. No symptoms were observed by 16 d after challenge in the 3 dogs receiving 2 g of IgY powder. Of the 3 dogs receiving 0.5 g of IgY powder, 2 had clinical CPV-2 disease; however, the manifestations were less severe than in the control group. Furthermore, the IgY-treated groups had significantly greater weight gain and shorter duration of virus shedding than the control group. These results indicate that IgY is useful in protecting dogs from CPV-2-induced clinical disease.     

Egg yolk IgY: protection against rotavirus induced diarrhea and modulatory effect on the systemic and mucosal antibody responses in newborn calves

Bovine rotavirus (BRV) is an important cause of diarrhea in newborn calves. Local passive immunity is the most efficient protective strategy to control the disease. IgY technology (the use of chicken egg yolk immunoglobulins) is an economic and practical alternative to prevent BRV diarrhea in dairy calves. The aim of this study was to evaluate the protection and immunomodulation induced by the oral administration of egg yolk enriched in BRV specific IgY to experimentally BRV infected calves. All calves in groups Gp 1, 2 and 3 received control colostrum (CC; BRV virus neutralization Ab titer - VN=65,536; ELISA BRV IgG(1)=16,384) prior to gut closure. After gut closure, calves received milk supplemented with 6% BRV-immune egg yolk [(Gp 1) VN=2048; ELISA IgY Ab titer=4096] or non-immune control egg yolk [(Gp 2) VN<4; ELISA IgY Ab titer<4] twice a day, for 14 days. Calves receiving CC only or colostrum deprived calves (CD) fed antibody (Ab) free milk served as controls (Gp 3 and 4, respectively). Calves were inoculated with 10(5.85)focus forming units (FFU) of virulent BRV IND at 2 days of age. Control calves (Gp 3 and 4) and calves fed control IgY (Gp 2) were infected and developed severe diarrhea. Around 80% calves in Gp 1 (IgY 4096) were infected, but they showed 80% (4/5) protection against BRV diarrhea. Bovine RV-specific IgY Ab were detected in the feces of calves in Gp 1, indicating that avian antibodies (Abs) remained intact after passage through the gastrointestinal tract. At post infection day 21, the duodenum was the major site of BRV specific antibody secreting cells (ASC) in all experimental groups. Mucosal ASC responses of all isotypes were significantly higher in the IgY treated groups, independently of the specificity of the treatment, indicating that egg yolk components modulated the immune response against BRV infection at the mucosal level. These results indicate that supplementing newborn calves' diets for the first 14 days of life with egg yolk enriched in BRV-specific IgY represents a promising strategy to prevent BRV diarrhea. Moreover a strong active ASC immune response is induced in the intestinal mucosa following BRV infection after the administration of egg yolk, regardless the specificity of the treatment.     

卵黄抗体在疾病防制中的应用研究进展

卵黄抗体（immunoglobulin of yolk,IgY）是指从免疫禽蛋中提取出的针对特定抗原的抗体,是存在于卵黄中的最主要免疫球蛋白,具有化学性质稳定、产量高、成本低、特异性强且无任何毒副作用等特点;且由于动物种系发生距离远,不会发生交叉血清学反应。IgY在动物及人的疾病防制中具有显著优势。作者对IgY的结构特点、理化性质、作用机理及其在各类动物疾病防制方面的应用及发展前景进行了综述,尤其是在动物疾病的治疗方面,如治疗畜禽腹泻及烈性、急性、危害性大的病毒疫病;治疗人类疾病特别是严重危害人类财产安全的人畜共患病;其他方面如水产、皮毛动物等重大疾病。IgY在有效治疗动物疫病的同时,也减少了人畜共患病的可能,从人身安全方面考虑,也必将具有重大发展前景。     

Research Progress on Immunoglobulin of Yolk in the Prevention and Treatment of Various Diseases

Immunoglobulin of yolk (IgY) refers to the specific antibodies from the immune eggs, is the most important immunoglobulin in the yolk,which has the characteristics of stable chemical properties, high yield, low cost, high specificity and no toxic side effects, there was no cross serological reaction among animals breeds because of a long distance. IgY has a significant advantage in animal and human disease prevention and treatment. In this research,we reviewed the application of structural characteristics, physicochemical property and action mechanism of IgY in prevention treatment of animal disease and developing prospect, especially in the treatment of animal diseases, such as diarrhea and acute treatment of animal spirit, harm, large virus disease; zoonosis seriously endanger the safety of human property; Other aspects such as aquaculture, animal fur and other major diseases. IgY could effectively prevent and treat animal diseases, but also reduce the possibility of zoonosis, which will be of great significance for the protection of personal safety.     

抗牛多杀性巴氏杆菌高免卵黄抗体IgY的制备及间接血凝检测方法的建立

本研究通过自制牛源荚膜血清A型多杀性巴氏杆菌灭活菌苗免疫产蛋鸡,采用卡拉胶结合硫酸铵沉淀法提取卵黄抗体IgY,并采用间接血凝方法检测抗体效价。结果表明,抗原致敏红细胞的最佳浓度是800μg/mL,免疫后第7周抗体效价达到高峰,效价为1：1024,高效价持续5周开始下降,测定提取的IgY浓度为8.258mg/mL,无菌检测及动物安全性实验表明制备的卵黄抗体安全可靠。本研究制备了抗牛多杀性巴氏杆菌卵黄抗体,为防治由荚膜血清A型多杀性巴氏杆菌所致的犊牛肺炎提供了新的手段。     

免疫卵黄特异性阻断家蚕浓核病感染的研究

用家蚕浓核病病原(Bombyxmoridensonucleosisvirus,BmDNV)免疫蛋鸡收集的卵黄,通过体外中和与体内中和生物试验测定鸡免疫卵黄对DNV的防治效果。结果表明,免疫的鸡卵黄能特异性阻断DNV感染家蚕,达到预防的目的,而非免疫卵黄未表现有阻断作用。结果提示:鸡免疫卵黄中含有抗DNV的有效抗体。     

Chicken egg yolk antibodies(IgY) as non-antibiotic production enhancers for use in swine production:a review

In recent years,the use of in-feed antibiotics for growth and disease prevention in livestock production has been under severe scrutiny.The use and misuse of in-feed antibiotics has led to problems with drug residues in animal products and increased bacterial resistance.Chicken egg yolk antibodies(IgY) have attracted considerable attention as an alternative to antibiotics to maintain swine health and performance.Oral administration of IgY possesses many advantages over mammalian IgG such as cost-effectiveness,convenience and high yield.This review presents an overview of the potential to use IgY immunotherapy for the prevention and treatment of swine diarrhea diseases and speculates on the future of IgY technology.Included are a review of the potential applications of IgY in the control of enteric infections of either bacterial or viral origin such as enterotoxigenic Escherichia coli,Salmonella spp.,rotavirus,porcine transmissible gastroenteritis virus,and porcine epidemic diarrhea virus.Some potential obstacles to the adoption of IgY technology are also discussed.     

Chicken egg yolk antibodies (IgY) as non-antibiotic production enhancers for use in swine production: a review

In recent years, the use of in-feed antibiotics for growth and disease prevention in livestock production has been under severe scrutiny. The use and misuse of in-feed antibiotics has led to problems with drug residues in animal products and increased bacterial resistance. Chicken egg yolk antibodies (IgY) have attracted considerable attention as an alternative to antibiotics to maintain swine health and performance. Oral administration of IgY possesses many advantages over mammalian IgG such as cost-effectiveness, convenience and high yield. This review presents an overview of the potential to use IgY immunotherapy for the prevention and treatment of swine diarrhea diseases and speculates on the future of IgY technology. Included are a review of the potential applications of IgY in the control of enteric infections of either bacterial or viral origin such as enterotoxigenic Escherichia coli, Salmonella spp., rotavirus, porcine transmissible gastroenteritis virus, and porcine epidemic diarrhea virus. Some potential obstacles to the adoption of IgY technology are also discussed.     

卵黄抗体提取方法及其在畜禽细菌性肠道疾病防治中的应用

细菌性肠道感染是畜禽养殖过程中的常见疾病，易引起畜禽采食量下降、生产性能降低等问题，严重者甚至造成死亡。在养殖过程中多采用抗生素对其进行治疗，但由于抗生素长期大量使用，特别是不合理使用，使药物残留和细菌耐药性问题日益凸显。因此，发展安全可靠的抗生素替代品已然成为当今畜牧行业的研究热点。卵黄抗体（egg yolk immunoglobulins，IgY）是通过免疫接种产蛋鸡后，在蛋黄中表达的一种免疫球蛋白，可用于相应疾病的预防和治疗。IgY具有产量大、性质稳定、安全高效等诸多优点，目前IgY作为抗生素替代品已被广泛用于畜禽养殖过程中，并取得了显著的效果。文章介绍了IgY的分子结构、理化性质和作用机理，总结并比较了5种IgY提取方法的去脂率、抗体效价、总蛋白含量等指标，最后详细介绍了IgY在防治畜禽常见细菌性感染中的研究现状和应用前景，以期为IgY的高效生产及疾病防治提供研究依据和技术支持。     

抗BVDV卵黄抗体的制备

采用牛病毒性腹泻病毒(BVDV)免疫产蛋母鸡,然后用水稀释法成功地从卵黄中分离出抗BVDV免疫球蛋白(抗-BVDV IgY)。建立起测定鸡蛋中特异性抗BVDV活性的间接ELISA方法,并采用此方法检测每次免疫后第10天的抗体滴度。结果表明,蛋鸡在首次免疫后第10天,卵黄中可以检测到抗-BVDV IgY;5次免疫后,抗体效价达到1:6400,半年后仍能维持在该水平。