LIPOSOME DRUG CARRIERS WITH PH-SENSITIVITY

摘要

A liposome composition for delivering of a biologically active agent having at a least first rigid lipid and a second rigid lipid each having a head group and a hydrophobic tail; a polyethyleneglycol-linked lipid having a side chain matching at least a portion of the first or the second lipid; and an entrapped biologically active agent. The first lipid can be a zwitterionic lipid and the second lipid can have a titratable head group. The composition can be adapted to release the entrapped at a certain pH.