Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/6567
Title: Polymeric nanocapsules prevent oxidation of core-loaded molecules : evidence based on the effects of docosahexaenoic acid and neuroprostane on breast cancer cells proliferation.
Authors: Roy, Jérôme
Oliveira, Liliam Teixeira
Oger, Camille
Galano, Jean Marie
Poncé, Valerie Bultel
Richard, Sylvain
Guimarães, Andrea Grabe
Vilela, José Mário Carneiro
Andrade, Margareth Spangler
Durand, Thierry
Besson, Pierre
Mosqueira, Vanessa Carla Furtado
Guennec, Jean-Yves Le
Keywords: Acid
Neuroprostanes
Polyunsaturated fatty acids
Asymmetrical flow field flow fractionation
Breast carcinoma cells
Issue Date: 2015
Citation: ROY, J. et al. Polymeric nanocapsules prevent oxidation of core-loaded molecules: evidence based on the effects of docosahexaenoic acid and neuroprostane on breast cancer cells proliferation. Journal of Experimental & Clinical Cancer Research, v. 34, p. 2-12, 2015. Disponível em: <https://jeccr.biomedcentral.com/articles/10.1186/s13046-015-0273-z>. Acesso em: 16 jun. 2016.
Abstract: Background: Nanocapsules, as a delivery system, are able to target drugs and other biologically sensitive molecules to specific cells or organs. This system has been intensively investigated as a way to protect bioactives drugs from inactivation upon interaction with the body and to ensure the release to the target. However, the mechanism of improved activity of the nanoencapsulated molecules is far from being understood at the cellular and subcellular levels. Epidemiological studies suggest that dietary polyunsaturated fatty acids (PUFA) can reduce the morbidity and mortality from breast cancer. This influence could be modulated by the oxidative status of the diet and it has been suggested that the anti-proliferative properties of docosahexaenoic acid (DHA) are enhanced by pro-oxidant agents. Methods: The effect of encapsulation of PUFA on breast cancer cell proliferation in different oxidative medium was evaluated in vitro. We compared the proliferation of the human breast cancer cell line MDA-MB-231 and of the non-cancer human mammary epithelial cell line MCF 10A in different experimental conditions. Results: DHA possessed anti-proliferative properties that were prevented by alpha-tocopherol (an antioxidant) and enhanced by the pro-oxidant hydrogen peroxide that confirms that DHA has to be oxidized to exert its anti-proliferative properties. We also evaluated the anti-proliferative effects of the 4(RS)-4-F4t-neuroprostane, a bioactive, non-enzymatic oxygenated metabolite of DHA known to play a major role in the prevention of cardiovascular diseases. DHA-loaded nanocapsules was less potent than non-encapsulated DHA while co-encapsulation of DHA with H2O2 maintained the inhibition of proliferation. The nanocapsules slightly improves the anti-proliferative effect in the case of 4(RS)-4-F4t-neuroprostane that is more hydrophilic than DHA. Conclusion: Overall, our findings suggest that the sensitivity of tumor cell lines to DHA involves oxidized metabolites. They also indicate that neuroprostane is a metabolite participating in the growth reducing effect of DHA, but it is not the sole. These results also suggest that NC seek to enhance the stability against degradation, enhance cellular availability, and control the release of bioactive fatty acids following their lipophilicities.
URI: http://www.repositorio.ufop.br/handle/123456789/6567
metadata.dc.identifier.doi: https://doi.org/10.1186/s13046-015-0273-z
ISSN: 1756-9966
metadata.dc.rights.license: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Fonte: o próprio artigo.
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