METHOD OF TARGETING SPECIFIC CELL POPULATIONS USING CELL-BINDING AGENT MAYTANSINOID CONJUGATES LINKED VIA NON-CLEAVABLE LINKER, CONJUGATES, AND METHODS OF MAKING CONJUGATES
PROBLEM TO BE SOLVED: To provide a method of delivering highly cytotoxic maytansinoids to a target cell population such as tumor cells.SOLUTION: The present invention provides: cell-binding agent-maytansinoid conjugates effective for cancer therapy, in which a cell-binding agent is covalently linked to a maytansinoid derivative modified with a sulfur-free non-cleavable linker represented by formula 7; and a method of delivering the maytansinoids to a target cell population using the conjugates. (R is H or SO3Na+.)SELECTED DRAWING: None【課題】高い細胞毒性のあるメイタンシノイドを、腫瘍細胞等の標的細胞集団に送達する方法の提供。【解決手段】式7に代表される硫黄を含有しない非開裂リンカーで修飾したメイタンシノイド誘導体と細胞結合物質とを共有結合させた、癌治療に有効な細胞結合物質-メイタンシノイド複合体、及び該複合体を用いるメイタンシノイドの標的細胞集団への送達方法。(RはH又はSO3Na+)【選択図】なし