Poly(Hpma)-coated liposomes demonstrate prolonged circulation in mice.

Abstract:

:Surface modification of liposomes with amphiphilic flexible polymers significantly prolongs their circulation time in blood and reduces uptake by cells of the reticuloendothelial system (RES). Several polymers have already been shown to provide steric protection to liposomes. Still more polymers are expected to serve this purpose, thus broadening the variability of properties of long-circulating liposomes. Poly[N-(2-hydroxypropyl)methacrylamide] (poly (HPMA)) seems to have some properties similar to polyethylene glycol (PEG), the most widely used polymer in liposome surface modification, including flexibility, hydrophilicity and low immunogenicity, which suggest that it may also function as an efficient steric protector of liposomes. Semitelechelic poly(HPMA) with single- or double-oleic acid hydrophobic terminus were synthesized and incorporated into the surface of liposomes composed of phosphatidylcholine and cholesterol. These poly(HPMA)-modified liposomes provided strong steric protection for liposomes, increasing their circulation time and decreasing liver accumulation in experimental mice. Poly(HPMA)-modified liposomes may become a useful addition to a family of long-circulating liposomes with potential to be used as a drug delivery system.

journal_name

J Liposome Res

authors

Whiteman KR,Subr V,Ulbrich K,Torchilin VP

doi

10.1081/LPR-100108459

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

153-64

issue

2-3

eissn

0898-2104

issn

1532-2394

journal_volume

11

pub_type

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