Copolymers of N-isopropylacrylamide can trigger pH sensitivity to stable liposomes.

Abstract:

:Stable liposomes were rendered pH-sensitive by complexation to a polymer that undergoes marked temperature- and pH-dependent water solubility changes. The N-isopropylacrylamide-methacrylic acid copolymer was prepared with or without octadecyl acrylate. At pH below the phase transition of the polymer, egg phosphatidylcholine liposomes quickly released a part of their contents only when associated with the octadecyl aliphatic chain grafted polymer at 37 degrees C. Similarly, sterically stabilized liposomes also quickly released a significant part of the entrapped fluorescent markers at pH 5.5-4.9, values corresponding to those of endosomes/lysosomes. This new pH-sensitive liposome-polymer system may further improve the efficiency of liposomal drug delivery.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Meyer O,Papahadjopoulos D,Leroux JC

doi

10.1016/s0014-5793(97)01520-2

subject

Has Abstract

pub_date

1998-01-02 00:00:00

pages

61-4

issue

1

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(97)01520-2

journal_volume

421

pub_type

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