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Anti-IgE Induced 5-Hydroxy Tryptamine Release from Rat Peritoneal Mast Cells
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作者 黄钦田 徐桦 郑茂锭 《The Journal of Biomedical Research》 CAS 1996年第1期30-31,47,共3页
Immediatehypersensitivityisrelatedwithcroslinkingofcel-boundIgEonthesurfaceofmastcelsandbasophils.Ratswereimmunizedwithovalbuminandtheperitonealmastcelswerecolectedfromimmunizedratsandchalengedwithrabitanti-ratIgEseru... Immediatehypersensitivityisrelatedwithcroslinkingofcel-boundIgEonthesurfaceofmastcelsandbasophils.Ratswereimmunizedwithovalbuminandtheperitonealmastcelswerecolectedfromimmunizedratsandchalengedwithrabitanti-ratIgEseruminvitro.The[3H]5-hydroxytryptaminereleaserateswereasayed.Theresultsshowedthekineticsandconcentration-responsecharacteristicsofserotoninreleasefromratmastcels. 展开更多
关键词 anti-ige MEDIATOR mastcel SEROTONIN
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Anti-IgE单链抗体纯化工艺研究及活性鉴定 被引量:1
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作者 代云见 张勇侠 +3 位作者 何勇智 丛聪 张涛 王明蓉 《中国生物工程杂志》 CAS CSCD 北大核心 2015年第12期51-57,共7页
目的:建立anti-IgE单链抗体纯化工艺并对其活性进行鉴定。方法:根据protein L亲和层析填料和Ni亲和层析填料的特点分析,经初筛后选用protein L填料作为第一步初纯化填料,Ni亲和层析填料作为第二步精细纯化填料。通过对这两种纯化方式的... 目的:建立anti-IgE单链抗体纯化工艺并对其活性进行鉴定。方法:根据protein L亲和层析填料和Ni亲和层析填料的特点分析,经初筛后选用protein L填料作为第一步初纯化填料,Ni亲和层析填料作为第二步精细纯化填料。通过对这两种纯化方式的上样条件和洗脱条件进行研究,建立了anti-IgE单链抗体的纯化工艺。结果:protein L亲和层析的初纯化工艺:最佳杂质洗涤pH=3.5,最佳目标蛋白洗脱pH=2.0,并且pH=2.0洗脱的目标蛋白收集在第二步Ni亲和层析的上样缓冲液中,可直接进行第二步Ni亲和层析纯化。所建立的Ni亲和层析精细纯化工艺:最佳杂质洗涤为50mmol/L咪唑,最佳目标蛋白洗脱为500mmol/L咪唑。经两步亲和纯化,目标产物在SDS-PAGE上纯度为99.0%,CE-SDS上纯度为99.5%,两步总收率为80.0%。纯化后的蛋白经竞争ELISA和Biacore检测,证实该产品特异性识别IgE靶标,与IgE靶标的亲和力达到8.59e^(-9)M,并且竞争Biacore结果显示该抗体对IgE有良好的中和活性,其抑制IgE的EC50值为70n M。结论:建立了一种高效、简洁的大肠杆菌表达的anti-IgE单链抗体纯化工艺,为其进一步规模放大工艺的建立奠定了基础。同时证明了该新型小分子anti-IgE抗体对靶标具有良好的特异性、亲和力以及中和活性,并展示出其在医用中的应用价值。所建立的小分子抗体纯化工艺技术对其他小分子单链抗体的纯化具有参考价值。 展开更多
关键词 anti-ige单链抗体 proteinL亲和层析 Ni亲和层析 哮喘
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Current State of Monoclonal Antibody Therapy for Allergic Diseases
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作者 Yan Chen Wei Wang +5 位作者 Huihui Yuan Yan Li Zhe Lv Ye Cui Jie Liu Sun Ying 《Engineering》 SCIE EI 2021年第11期1552-1556,共5页
Allergic disease is one of the most common chronic diseases,which can affect both children and adults,be often caused by allergen-induced unfavorable immune responses,and initiate various symptoms in different organs,... Allergic disease is one of the most common chronic diseases,which can affect both children and adults,be often caused by allergen-induced unfavorable immune responses,and initiate various symptoms in different organs,including up-/low-airways and skin,such as asthma,atopic dermatitis,and rhinosinusitis.With increasing prevalence of allergic disease worldwide and their impact on the quality of life,new biological therapeutic approaches for these disorders become hot areas of intensive research.Multiple factors are involved and play important role in the pathogenesis of allergic disease,which can promote or trigger T helper 2(Th2)-type immune responses,leading to production of the type 2 cytokines and immunoglobulin E(IgE),the two critical events in the allergic diseases.Using monoclonal antibodies to target these molecules,therefore,might provide possible benefits for the patients suffered from these diseases.Apart of those having approved biologics for allergic diseases,some potential targets such as epithelial-derived alarmins thymic stromal lymphopoietin(TSLP)and interleukin 33(IL-33)have been also described and proposed to develop monoclonal antibodies against either these cytokines,their receptors,or both.These new and potential targets have substantially enriched the therapeutic opportunities in the field of allergic diseases.The present review aims to briefly outline the role of monoclonal antibodies targeting the cytokines and immunoglobulin involved in the development of allergic diseases,and to discuss the clinical effects of these antibodies. 展开更多
关键词 Allergic disease Monoclonal antibody anti-ige CYTOKINES Clinical trials
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