It is intended to provide a method whereby a plural number of antibodies against cell surface antigens are quickly classified and to provide a method whereby antigens of the thus classified antibodies are quickly identified. Further, it is intended to provide a method of promoting the utilization of the useful data obtained by the above methods. Furthermore, it is intended to provide an antibody which is effective in treating or diagnosing cancer. Namely, a method of classifying antibodies which comprises: (1) the step of preparing a plural number of antibodies respectively recognizing cell surface antigens; (2) the step of bringing each of these antibodies into contact with a cell of the same species; (3) the step of analyzing each of the cells having been treated in the step (2) by flow cytometry and thus obtaining data indicating the reactivity of each antibody with its cell surface antigen; and (4) the step of comparing the thus obtained data and classifying the individual antibodies depending on the similarity. A method of identifying antigens which further comprises: (5) the step of selecting one to several antibodies from each antibody group formed in the step (4) and identifying antigens thereof; and (6) on the assumption that antigens of the antibodies belonging to a single antibody group are the same or highly related to one another, making relations between the antigens having been identified in the step (5) and the antibody groups to thereby identify the antigens. An antibody against HER1, an antibody against HER2, an antibody against CD46, an antibody against ITGA3, an antibody against ICAM1, an antibody against ALCAM, an antibody against CD147, an antibody against C1qR, an antibody against CD44, an antibody against CD73, an antibody against EpCAM and an antibody against HGFR, each obtained by using the above methods.
本发明的目的是提供一种方法,据此可快速对针对细胞表面抗原的多种
抗体进行分类,并提供一种方法,据此可快速识别已分类
抗体的抗原。此外,还打算提供一种促进利用通过上述方法获得的有用数据的方法。此外,还希望提供一种能有效治疗或诊断癌症的
抗体。也就是说,一种对
抗体进行分类的方法,它包括:(1) 制备多个分别识别细胞表面抗原的
抗体;(2) 使这些
抗体分别与同种细胞接触;(3) 用流式细胞仪分析在步骤(2)中处理过的每个细胞,从而获得表明每个
抗体与其细胞表面抗原反应性的数据;(4) 比较由此获得的数据,并根据相似性对各个
抗体进行分类。一种鉴定抗原的方法,进一步包括:(5) 从步骤(4)中形成的每个
抗体组中选择一至数个
抗体并鉴定其抗原的步骤;以及(6) 假定属于单个
抗体组的
抗体的抗原相同或彼此高度相关,在步骤(5)中鉴定的抗原与
抗体组之间建立联系,从而鉴定抗原。通过上述方法分别获得抗 HER1
抗体、抗 HER2
抗体、抗 C
D46
抗体、抗 IT
GA3 抗体、抗 ICAM1
抗体、抗 ALCAM
抗体、抗 CD147
抗体、抗 C1qR
抗体、抗 C
D44
抗体、抗 CD73
抗体、抗 EpCAM
抗体和抗
HGFR
抗体。