Evaluation of cell tolerability of a series of lipoamino acids using biological membranes and a biomembrane model.

Abstract:

:The interaction of a series of amphiphilic 2-alkyl aminoacids (lipoamino acids, LAAs) with different cell cultures and biomembrane models was investigated. LAAs can be useful promoieties to modify the physico-chemical properties of many drugs, and in particular their lipophilicity. Tests were performed in vitro on mammalian cells (murine astrocytes) and human red blood cells (haemolysis), and in vivo on rabbit eye as alternative models to assess the tolerability or the potential damaging effects of these compounds on different biological systems. The mode of interaction of LAAs with pure phospholipid multilamellar liposomes, taken as a biomembrane model, was also analysed by differential scanning calorimetry experiments. Different tolerability/toxicity patterns were obtained in the various models; in particular, the most lipophilic terms of the series, methyl 2-aminohexadecanoate (LAA16), displayed haemolytic activity and toxicity for mouse astrocyte cultures. A specific assay confirmed that LAA16 acted at level of cell membranes, while neither any damaging effects on nucleus or apoptotic induction were observed. The shorter-chain LAAs and the tetradecyl homologue (LAA14) showed the best compatibility with the various cell models.

journal_name

Curr Drug Deliv

journal_title

Current drug delivery

authors

Pignatello R,Noce C,Campisi A,Acquaviva R,Bucolo C,Puglisi G,Toth I

doi

10.2174/156720107780362348

subject

Has Abstract

pub_date

2007-04-01 00:00:00

pages

109-21

issue

2

eissn

1567-2018

issn

1875-5704

journal_volume

4

pub_type

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