Hyaluronan-modified and regular multilamellar liposomes provide sub-cellular targeting to macrophages, without eliciting a pro-inflammatory response

作者：Glucksam Galnoy Yifat; Zor Tsaffrir; Margalit Rimona^*

来源：Journal of Controlled Release, 2012, 160(2): 388-393.

DOI：10.1016/j.jconrel.2011.10.008

• Macrophage
• Liposomes
• Hyaluronan
• Targeting
• Internalization
• TNF-alpha

Macrophages, pivotal cells in onset and progression of inflammation, can benefit from sub-cellular drug targeting to the molecular loci of drug action, whether cell membrane or cell interior. Postulating manipulation of liposome size and surface properties can provide sub-cellular targeting, we studied: thermodynamics of liposome-macrophage binding; liposome cellular localizations; liposome safety including pro-inflammatory cytokine production. We aimed at extending the body of knowledge on interactions of regular unilamellar (RL-ULV) and multilamellar (RL-MLV) liposomes with macrophages. We investigated, for the first time, the interactions of hyaluronan (HA) surface-modified liposomes (HA-ULV and HA-MLV) with macrophages, with respect to multiple equilibria binding combined with cellular localization. Macrophages bound all four liposome types, substantially-favoring the two MLV species over the two ULV species, and internalizing only RL-MLV. Three macrophage-internalization inhibitors (2-deoxyglucose, LY294002 and Wortmannin) reduced RL-MLV internalization but not binding affinity nor binding capacity. Both MLV types were not detrimental to cell proliferation, nor did they elicit TNF-alpha production in resting and in LPS-activated macrophages. Moreover, a 24-hour exposure of LPS-activated macrophages to HA-MLV reduced TNF-a production by 40%, indicating potential for anti-inflammatory activity. In conclusion RL-MLV and HA-MLV are the liposomes of choice for delivering anti-inflammatory drugs to the macrophage surface or its interior, according to the loci of drug action.

• 出版日期2012-6-10