A liposome composition for localizing an anti-tumor compound to a solid tumor via the bloodstream. The liposomes, which contain the agent in entrapped form, are composed of vesicle-forming lipids and between 1-20 mole percent of a vesicle-forming lipid derivatized with hydrophilic biocompatible polymer, and have sizes in a selected size range between 0.07 and 0.12 microns. After intravenous administration, the liposomes are taken up by the tumor within 24-48 hours, for site-specific release of entrapped compound into the tumor. In one composition for use in treating a solid tumor, the compound is an anthracycline antibiotic drug which is entrapped in the liposomes at a concentration of greater than about 50 &mgr;g agent/&mgr;mole liposome lipid. The method results in regression of solid colon and breast carcinomas which are refractory to anthracycline antibiotic drugs administered in free form or entrapped in conventional liposomes.
一种通过血液定位抗肿瘤化合物到实体肿瘤的脂质体组合物。这些脂质体包含被困在其中的药物,由成泡脂质和1-20摩尔百分比的被
水亲和性
生物相容性聚合物衍生的成泡脂质组成,并且具有在0.07和0.12微米之间的选择性大小范围。静脉注射后,脂质体在24-48小时内被肿瘤吸收,以便将被困住的化合物定点释放到肿瘤中。在一种用于治疗实体肿瘤的组合物中,该化合物是一种
蒽环类抗生素药物,其浓度大于50微克药物/微摩尔脂质体脂质。该方法导致对于自由形式或被困在常规脂质体中的
蒽环类抗生素药物无效的实体结肠和乳腺癌的退缩。