Prolonged blood circulation in rats of nanospheres surface-modified with semitelechelic poly[N-(2-hydroxypropyl)methacrylamide].

Abstract:

:Semitelechelic poly[N-(2-hydroxypropyl)methacrylamide]s (ST-PHPMA) containing one amino end-group and differing in molecular weight were synthesized by radical polymerization in the presence of 2-aminoethanethiol (AET) as chain transfer agent. These polymers were covalently attached via amide bonds to the surface of nanospheres based on a copolymer of methyl methacrylate, maleic anhydride, and methacrylic acid. When compared to unmodified nanospheres, those with the surface modified with ST-PHPMA possessed a decreased protein (albumin, IgG, fibrinogen) adsorption in vitro, an increased intravascular half-life as well as a decreased accumulation in the liver after intravenous administration into rats. The higher the molecular weight of the ST-PHPMA, the more pronounced the changes in these properties. The results obtained have clearly demonstrated that covalently attached ST-PHPMA chains are efficient in decreasing the biorecognition of negatively charged (hydrophilic) polymer surfaces.

journal_name

Pharm Res

journal_title

Pharmaceutical research

authors

Kamei S,Kopecek J

doi

10.1023/a:1016247206531

subject

Has Abstract

pub_date

1995-05-01 00:00:00

pages

663-8

issue

5

eissn

0724-8741

issn

1573-904X

journal_volume

12

pub_type

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