申请人:Shen Youqing
公开号:US20090143486A1
公开(公告)日:2009-06-04
Described are charge reversible polymers, peptides and their resulting colloidal particles, comprising polymers and peptides having primary and secondary amines that are protected as easily hydrolysable amides. The amides are charge-reversible such that at neutral pH they are negatively charged but become positively charged at pH less than 6 and thus are relatively stable at neutral pH but quickly hydrolyze at pH below 6. Incorporating a drug in a micelle or a polymer comprised of the charge-reversible polymers or peptides provides a drug carrier for delivering the drug preferentially to the solid tumor or other targeted cells.
本文描述了可逆电荷的聚合物、肽及其所形成的胶体颗粒,这些聚合物和肽具有一级和二级胺,这些胺被保护成易水解的酰胺。这些酰胺是可逆电荷的,在中性pH下呈负电荷,在pH小于6时呈正电荷,因此在中性pH下相对稳定,但在pH小于6时很快水解。将药物包含在由可逆电荷的聚合物或肽组成的胶束或聚合物中,提供了一种药物载体,可优先将药物传递到固体肿瘤或其他靶向细胞。