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Interactions of lipid bilayers and natural antioxidants

Grant number: 14/06713-1
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): August 01, 2014
Effective date (End): September 30, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Organic Chemistry
Principal Investigator:Marcia Perez dos Santos Cabrera
Grantee:Luana Talzi Diniz
Host Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil


Therapeutic effects of antioxidants have been investigated for their role on prevention and treatment of several diseases, but few studies report on the interaction of these natural substances with membranes. Recently it has been identified that the antioxidant curcumin modulates lipid bilayer properties. Moreover this action was reported to be similar to the effects of other amphiphilic molecules such as antimicrobial peptides. Studies based on model membranes evidenced that electrostatic and elastic characteristics of bilayers, which are due to their lipid composition, are important influences on the mechanisms of interactions, but few studies report how antioxidant substances change them. In the present step of the study the partition coefficients of curcumin and quercetin in zwitterionic (containing cholesterol or in its absence) and anionic phospholipid bilayers will be determined. These partition coefficients will be related to changes in the bilayers fluidity as determined by the fluorescence anisotropy of the probe chlorofil A.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
LEITE, NATALIA B.; MARTINS, DANUBIA B.; FAZANI, VINICIUS E.; VIEIRA, MAIRA R.; DOS SANTOS CABRERA, MARCIA P.. Cholesterol modulates curcumin partitioning and membrane effects. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES, v. 1860, n. 11, p. 2320-2328, . (14/06713-1, 14/08372-7, 14/11877-3, 12/24259-0)

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