A biophysical approach to Phospholipase A activity and inhibition by anti-inflammatory drugs

The present study describes the interaction of two nonsteroidal anti-inflammatory drugs (ibuprofen and piroxicam) with PLA from and seeks to deepen the knowledge about the influence of the biophysical properties of biomembranes, and the inhibitory effect of the drugs on the enzymatic activity. Fluor...

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Bibliographic Details
Published inBiophysical chemistry Vol. 152; no. 1-3
Main Authors Gaspar, Diana, Lúcio, Marlene, Wagner, Kerstin, Brezesinski, Gerald, Rocha, Sandra, Lima, J.L.F. Costa, Reis, Salette
Format Journal Article
LanguageEnglish
Published Elsevier 04.11.2010
Subjects
Chemical Physics
Physics
membrane biophysical properties
enzymatic inhibition
membrane model systems
NSAIDs
sPLA
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Summary:The present study describes the interaction of two nonsteroidal anti-inflammatory drugs (ibuprofen and piroxicam) with PLA from and seeks to deepen the knowledge about the influence of the biophysical properties of biomembranes, and the inhibitory effect of the drugs on the enzymatic activity. Fluorescent techniques with and without the use of probes, surface pressure/molecular area isotherms, surface pressure/time and molecular area/time measurements combined with circular dichroism spectroscopy and direct techniques of visualization of lipid membranes (Brewster angle microscopy), revealed that both drugs inhibit PLA. Additionally, the structure and characteristics of the lipid bilayer, as well as, the direct interaction of drugs with the enzyme seem to play an important role on the hydrolytic activity of PLA towards membrane model systems. These results open a way of finding new and better strategies that can contribute to the development of suitable agents for relieving inflammatory conditions.
ISSN:0301-4622
DOI:10.1016/j.bpc.2010.08.006