Described herein are methods and compositions for intracellular delivery of therapeutic molecules. Disclosed herein are selective delivery conjugate comprising a targeting ligand conjugated to a selective delivery molecule (a) an acidic sequence (portion of A) which is effective to inhibit or prevent the uptake into cells or tissue retention, (b) a molecular transport or retention sequence (portion of B), and (c) a linker between portion of A and portion of B, and (d) at least one cargo moiety. Also, described are selective delivery molecules comprising a second linker comprising an intracellular cleavage site and optionally a self-immolative cleavage site.
本发明描述了用于治疗分子胞内递送的方法和组合物。公开了选择性递送偶联物,包括与选择性递送分子偶联的靶向
配体:(a)酸性序列(A部分),有效抑制或防止细胞或组织摄取或保留;(b)分子传输或保留序列(B部分);(c)A部分和B部分之间的连接器;(d)至少一个货物基团。还描述了选择性递送分子,包括第二连接器,包含细胞内裂解位点,可选地包括自焚裂解位点。