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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Berberine as a photosensitizing agent for antitumoral photodynamic therapy: Insights into its association to low density lipoproteins

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Andreazza, Nathalia Luiza ; Vevert-Bizet, Christine ; Bourg-Heckly, Genevieve ; Sureau, Franck ; Salvador, Marcos Jose ; Bonneau, Stephanie
Total Authors: 6
Document type: Journal article
Source: International Journal of Pharmaceutics; v. 510, n. 1, p. 240-249, AUG 20 2016.
Web of Science Citations: 13

Recent years have seen a growing interest in Berberine, a phytochemical with multispectrum therapeutic activities, as anti-tumoral agent for photodynamic therapy (PDT). In this context, low density lipoproteins (LDL) play a key role in the delivery of the photosensitizer in tumor cells. We correlate the physicochemical parameters of the berberine association to LDL with the influence of LDL-delivery on its accumulation in a glioma cell line and on its photo-induced activity in view of antitumor PDT. Our results evidence an important binding of 400 berberine molecules per LDL. Changes in berberine and apoprotein fluorescence suggest different fixation types, involving various LDL compartments including the vicinity of the apoprotein. The berberine association to LDL does not affect their recognition by the specific B/E receptors, of which over-expression increases the cellular uptake of LDL-preloaded berberine. Fluorescence microscopy evidences the mitochondrial labeling of the glioma model cells, with no significant modification upon LDL-delivery. Moreover, the cellular delivery of berberine by LDL increases its photocytotoxic effects on such cells. So, this research illustrates the potential of berberine as a photosensitizing agent for PDT, in particular due to their behavior towards LDL as plasma vehicles, and gives insights into its mechanisms of cell uptake. (C) 2016 Published by Elsevier B.V. (AU)

FAPESP's process: 11/23031-3 - Application of biophotonics in the analyses of the photosensitizers isoquinoline alkaloids berberine e isomoschatoline interaction with LDL in cell models
Grantee:Nathalia Luiza Andreazza
Support Opportunities: Scholarships abroad - Research Internship - Doctorate