Phosphate-based linkers with tunable stability for intracellular delivery of drug conjugates are described. The phosphate-based linkers comprise a monophosphate, diphosphate, triphosphate, or tetraphosphate group (phosphate group) and a linker arm comprising a tuning element and optionally a spacer. A payload is covalently linked to the phosphate group at the distal end of the linker arm and the functional group at the proximal end of the linker arm is covalently linked to a cell-specific targeting ligand such as an antibody. These phosphate-based linkers have a differentiated and tunable stability in blood vs. an intracellular environment (e.g. lysosomal compartment).
描述了一种具有可调稳定性的
磷酸酯基连接剂,用于药物共轭物的细胞内传递。这种
磷酸酯基连接剂包括一个
磷酸单酯、
磷酸二酯、
磷酸三酯或
磷酸四酯基团(
磷酸基团)和一个连接臂,包括一个调节元素和可选的间隔物。有效载荷以共价键连接到连接臂的远端的
磷酸基团上,连接臂的近端的功能基团以共价键连接到细胞特异性靶向
配体,如
抗体。这些
磷酸酯基连接剂在血液和细胞内环境(例如溶酶体区)中具有不同和可调的稳定性。