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Polymers 2019, 11(3), 483; https://doi.org/10.3390/polym11030483

Dapivirine Bioadhesive Vaginal Tablets Based on Natural Polymers for the Prevention of Sexual Transmission of HIV

1
Departamento de Farmacia Galénica y Tecnología Alimentaria, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain
2
Departamento Farmacología, Farmacognosia y Botánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Received: 26 February 2019 / Accepted: 11 March 2019 / Published: 13 March 2019
(This article belongs to the Special Issue Biomedical Polymer Materials)
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Abstract

Young sub-Saharan women are a group that is vulnerable to the sexual transmission of HIV. Pre-exposure prophylaxis through vaginal microbicides could provide them an option for self-protection. Dapivirine has been demonstrated to have topical inhibitory effects in HIV, and to provide protection against the sexual transmission of this virus. This paper reports on the studies into swelling behaviour, bioadhesion and release carried out on dapivirine tablets based on chitosan, locust bean gum and pectin, to select the most suitable formulation. The modified simulated vaginal fluid led to a high solubility of dapivirine and allowed the dapivirine release profiles to be characterized in sink conditions; this aqueous medium is an alternative to organic solvents, which are not a realistic option when evaluating systems whose behaviour varies in aqueous and organic media. Of the formulations evaluated, dapivirine/pectin tablets containing 290 mg of polymer and 30 mg of dapivirine present the most moderate swelling, making them the most comfortable dosage forms. Their high bioadhesive capacity would also allow the formulation to remain in the action zone and release the drug in a sustained manner, pointing to this formulation as the most promising candidate for future evaluations of vaginal microbicides for the prevention of HIV. View Full-Text
Keywords: HIV vaginal preexposure prophylaxis; dapivirine controlled release; bioadhesive vaginal tablets; pectin; locust bean gum; chitosan HIV vaginal preexposure prophylaxis; dapivirine controlled release; bioadhesive vaginal tablets; pectin; locust bean gum; chitosan
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Cazorla-Luna, R.; Martín-Illana, A.; Notario-Pérez, F.; Bedoya, L.-M.; Bermejo, P.; Ruiz-Caro, R.; Veiga, M.-D. Dapivirine Bioadhesive Vaginal Tablets Based on Natural Polymers for the Prevention of Sexual Transmission of HIV. Polymers 2019, 11, 483.

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