【摘要】 本文旨在根据小鼠脂联素受体-1(adiponectin receptor-1,AdipoR-1)的分子结构,制备抗AdipoR-1的多克隆抗体,为AdipoR-1的进一步研究创造条件。利用生物信息学分析预测小鼠AdipoR-1的理化特性、跨膜结构和抗原表位,结合AdipoR-1和AdipoR-2氨基酸序列相似性比对结果,设计出一段由16个氨基酸组成的多肽,用此肽段免疫大鼠得到多克隆抗体,利用ELISA、Westernblot等方法鉴定其特异性和滴度,并将该抗体用于正常及高胆固醇血症小鼠肌肉组织AdipoR-1的表达检测。结果表明,此抗体效价较高、特异性强。以上结果提示,生物信息学分析能较好地预测小鼠AdipoR-1的抗原表位,并成功制备高特异性的多克隆抗体。更多还原

【Abstract】 To establish a method for preparation of anti-mouse adiponectin receptor-1 (AdipoR-1) polyclonal antibody, the polypeptide antigen corresponding to AdipoR-1 was designed by bioinformatics analysis. The possible physicochemical property and trans- membrane structure were predicted by ExPASy and TMHMM, respectively. The antigen epitopes of mouse AdipoR-1 and its immunogenicity were analyzed by Antigenic Prediction and AntigenProfiler, respectively. According to the similarity analysis between AdipoR-1 and AdipoR-2 by Clustal W, a 16-amino acid polypeptide was designed as the antigen corresponding to AdipoR-1. To ensure the specificity of the polypeptide antigen, similarity search was run in the protein databases such as SWISS-PROT, PDB and Prosite databases. The polypeptide synthesized by solid-phase synthesis was used as immunogen to immunize rats to obtain anti-mouse AdipoR-1 polyclonal antibodies, the specificity and titer of which was identified by Western blot and indirect ELISA. The antibodies were applied to detect the AdipoR-1 expression in the muscle tissue in normal and cholesterolemic mice. The results from bioinformatics analysis showed that the similarity of amino acid sequences between AdipoR-1 and AdipoR-2 in mouse was 66%, and the designed polypeptide antigen corresponding to AdipoR-1 exhibited excellent immunogenicity (score=3.1). Using the polypeptide as antigen for immunization, anti-mouse AdipoR-1 polyclonal antibodies with high titer and good specificity were obtained. The results of Western blot demonstrated that there was no statistical difference in AdipoR-1 expression in muscle tissue between normal (1.80±0.06) and cholesterolemic mice (1.71±0.11). These results suggest that the antigen epitopes of mouse AdipoR-1 are well predicted by bioinformatics analysis, and successful preparation of the specific anti-AdipoR-1 polyclonal antibodies provides a useful tool for identification and further functional study of AdipoR-1.更多还原