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Encapsulation in lipid-core nanocapsules improves topical treatment with the potent antileishmanial compound CH8.

Escrivani, Douglas O and Lopes, Milene Valéria and Poletto, Fernanda and Ferrarini, Stela Regina and Sousa-Batista, Ariane J. and Steel, Patrick G. and Guterres, Sílvia Stanisçuaski and Pohlmann, Adriana Raffin and Rossi-Bergmann, Bartira (2020) 'Encapsulation in lipid-core nanocapsules improves topical treatment with the potent antileishmanial compound CH8.', Nanomedicine : nanotechnology, biology and medicine., 24 . p. 102121.

Abstract

Cutaneous leishmaniasis (CL) is a neglected parasitic disease conventionally treated by multiple injections with systemically toxic drugs. Aiming at a more acceptable therapy, we developed lipid-core nanocapsules (LNCs) entrapping the potent antileishmanial chalcone (CH8) for topical application. Rhodamine-labeled LNC (Rho-LNC-CH8) was produced for imaging studies. LNC-CH8 and Rho-LNC-CH8 had narrow size distributions (polydispersity index <0.10), with similar mean sizes (~180 nm) by dynamic light scattering. In vitro, Rho-LNC-CH8 was rapidly internalized by extracellular Leishmania amazonensis parasites macrophages in less than 15 min. LNC-CH8 activated macrophage oxidative mechanisms more efficiently than CH8, and was more selectively toxic against the intracellular parasites. In vivo, topically applied Rho-LNC-CH8 efficiently permeated mouse skin. In L. amazonensis-infected mice, LNC-CH8 reduced the parasite load by 86% after three weeks of daily topical treatment, while free CH8 was ineffective. In conclusion, LNC-CH8 has strong potential as a novel topical formulation for CL treatment.

Item Type:Article
Full text:(AM) Accepted Manuscript
Available under License - Creative Commons Attribution Non-commercial No Derivatives.
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1016/j.nano.2019.102121
Publisher statement:© 2020 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Date accepted:No date available
Date deposited:26 November 2019
Date of first online publication:28 October 2019
Date first made open access:28 October 2020

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