Disclosed are an antigen-binding molecule containing a sugar chain receptor-binding domain and having a weak antigen-binding activity in the pH of early-stage endosome compared to the antigen-binding activity in the pH of plasma; a pharmaceutical composition containing the antigen-binding molecule; and a method for producing these. Use of the antigen-binding molecule of the invention enables to promote uptake of an antigen into a cell and increase the number of antigens that a single antibody molecule can bind. Administration of the antibody enables to reduce the number of antigens in plasma more and more and improve pharmacokinetics of the antibody.
本发明公开了一种抗原结合分子,该分子含有糖链受体结合域,与血浆 pH 值中的抗原结合活性相比,该分子在早期内质体 pH 值中的抗原结合活性较弱;一种含有该抗原结合分子的药物组合物;以及生产这些药物组合物的方法。使用本发明的抗原结合分子可促进细胞对抗原的吸收,并增加单个
抗体分子可结合的抗原数量。使用本发明的
抗体可使血浆中的抗原数量越来越少,并改善
抗体的药代动力学。