A liposome composition for delivery of a nucleic acid in vivo or ex vivo is described. The liposomes in the composition are comprised of (i) a lipid that is neutral in charge at physiologic pH and positively charged at pH values less than physiologic pH and (ii) a lipid joined to a hydrophilic polymer by a dithiobenzyl linkage. The liposomes are associated with a nucleic acid for delievery to a cell.
描述了一种用于体内或体外递送核酸的脂质体组合物。组合物中的脂质体由(i)在生理pH下呈中性电荷,在低于生理pH值时呈正电荷的脂质和(ii)通过二
硫苯基键连接到亲
水聚合物的脂质组成。这些脂质体与核酸结合以递送到细胞。