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Passive and semi-active targeting of bone marrow and leukemia cells using anionic low cholesterol liposomes

机译:使用阴离子低胆固醇脂质体的骨髓和白血病细胞的被动和半活跃靶向

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摘要

Historically, the use of liposomes to enhance delivery of anticancer agents to cancer cells has focused primarily on solid tumors, which are characterized by rapid angiogenesis resulting in a poorly formed hypervasculature with abnormal vessel walls. The leaky vasculature in combination with poor lymphatic drainage has been demonstrated to lead to the accumulation of liposomes via the enhanced permeation and retention effect. However, only very limited information exists on the disposition of such delivery systems in the bone marrow compartment, the primary site of tumor cell origination and growth for many hematological malignancies. In this review we discuss the biological properties of anionic low-cholesterol liposome formulations and their potential for passively accumulating within the bone marrow and being selectively engulfed by leukemia cells compared to normal bone marrow cells. The therapeutic implications for preferential bone marrow delivery as well as the potential routes for the internalization of drug-encapsulated liposomes into cells in the absence of a targeting ligand are reviewed.
机译:从历史上看,使用脂质体来增强抗癌药物对癌细胞的输送主要集中在实体瘤上,其特征是快速血管生成,导致形成不良的血管系统和异常的血管壁。已经证明,血管渗漏与淋巴引流不良相结合,通过增强渗透和滞留效应,导致脂质体积聚。然而,关于骨髓室中这种输送系统的配置,目前只有非常有限的信息。骨髓室是许多血液系统恶性肿瘤的肿瘤细胞起源和生长的主要场所。在这篇综述中,我们讨论了阴离子低胆固醇脂质体制剂的生物学特性,以及与正常骨髓细胞相比,它们在骨髓中被动累积并被白血病细胞选择性吞噬的可能性。综述了优先骨髓输送的治疗意义,以及在缺乏靶向配体的情况下药物包裹的脂质体内化到细胞中的潜在途径。

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