The present invention provides: an antibody that has specificity for MUC 4 having a sugar chain structure that is expressed at a high level in cancer cells; a glycopeptide that constitutes an antigen that is suitable for producing this antibody; and a new means and method for the diagnosis, prevention, and/or treatment of cancer by means of the aforementioned antibody. The present invention relates to a monoclonal antibody against a glycopeptide. The glycopeptide comprises a human MUC 4 tandem unit peptide having an amino acid sequence represented by SEQ ID NO: 1, and an O-linked sugar chain. The O-linked sugar chain is N-acetylgalactosamine (GalNAc) and binds to threonine, which is the 8th amino acid of the tandem unit peptide. The present invention further includes: a glycopeptide for use in the production of a monoclonal antibody against human MUC 4; a method for detecting MUC 4 in a human body fluid sample; a kit that includes the abovementioned monoclonal antibody; and a pharmaceutical composition for the prevention and/or treatment of malignant tumors that contains the abovementioned monoclonal antibody as an active component.
本发明提供了一种具有特异性对MUC 4具有高
水平表达的糖链结构的
抗体;构成适用于制备该
抗体的抗原的糖肽;以及通过上述
抗体的新手段和方法诊断、预防和/或治疗癌症的方法。本发明涉及针对糖肽的单克隆
抗体。该糖肽包括具有由
SEQ ID NO: 1表示的
氨基酸序列的人类MUC 4
串联单元肽和一个O-连接的糖链。O-连接的糖链是
N-乙酰半
乳糖胺(GalNAc),并结合到
串联单元肽的第8个
氨基酸苏
氨酸上。本发明还包括:用于制备针对人类MUC 4的单克隆
抗体的糖肽;一种检测人体液体样本中MUC 4的方法;包括上述单克隆
抗体的试剂盒;以及作为活性成分含有上述单克隆
抗体的用于预防和/或治疗恶性肿瘤的药物组合物。