Abstract
An applicator designed for rectal delivery of microbicides was tested for acceptability by 95 young men who have sex with men, who self-administered 4 mL of placebo gel prior to receptive anal intercourse over 90 days. Subsequently, 24 of the participants self-administered rectally 4 mL of tenofovir or placebo gel over 7 days using a vaginal applicator, and compared both applicators on a Likert scale of 1–10, with 10 the highest rating. Participants reported high likelihood to use either applicator in the future (mean scores 9.3 and 8.8 respectively, p = ns). Those who tested both liked the vaginal applicator significantly more than the rectal applicator (7.8 vs. 5.2, p = 0.003). Improvements in portability, conspicuousness, aesthetics, tip comfort, product assembly and packaging were suggested for both. This rectal-specific applicator was not superior to a vaginal applicator. While likelihood of future use is reportedly high, factors that decrease acceptability may erode product use over time in clinical trials. Further attention is needed to develop user-friendly, quick-acting rectal microbicide delivery systems.
Resumen
Un aplicador diseñado para administrar los microbicidas rectales fue probado para determinar su aceptabilidad por 95 hombres jóvenes que tienen sexo con hombres, quienes auto-administraron 4 mL de un gel placebo antes del sexo anal receptivo durante 90 días. Posteriormente, 24 de los participantes auto-administraron rectalmente 4 mL de un gel tenofovir o placebo durante 7 días usando un aplicador vaginal, y compararon ambos aplicadores en una escala Likert de 1 a 10, 10 siendo la calificación más alta. Los participantes reportaron alta probabilidad de usar cualquiera de los dos aplicadores en el futuro (calificación media 9.3 y 8.8, respectivamente, p = ns). A los que probaron ambos les gustó significativamente más el aplicador vaginal que el rectal (7.8 vs. 5.2, p = 0.003). Se dieron sugerencias para mejorar la portabilidad, visibilidad, estética, comodidad de la punta, ensamblaje y embalaje de ambos aplicadores. Este aplicador específicamente para uso rectal no fue superior al aplicador vaginal. Aunque se reportó una alta probabilidad de uso en el futuro, los factores que disminuyen la aceptabilidad podrían afectar el uso del producto con el tiempo en los ensayos clínicos. Se necesita enfocar más atención en el desarrollo de sistemas de administración de microbicidas rectales que sean fáciles de usar y rápidas.
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Acknowledgments
We would like to thank the panel of experts that helped us during the original development of our rectal applicator. They are Drs. Peter Anton, Pamina Gorbach, Craig Hendrix, Ken Mayer, Ian McGowan, and Tom Moench, as well as activists in this field, Ms. Anna Forbes and Mr. Jim Pickett. We would also like to thank Jessica Cohen from PATH and Dr. Ana Ventuneac (formerly from HIV Center for Clinical and Behavioral Studies) for their collaboration in early stages of this study and all study volunteers without whom this project would not have been feasible. This research was sponsored by the US National Institutes of Health (NIH), including NICHD and NIMH, under R01 HD59533 (McGowan and Carballo-Diéguez, Co-PIs) and co-sponsored by CONRAD. Rectal applicator development was sponsored by the Foundation for AIDS Research (amfAR Research Grant # 106765-41-RGMC; Carballo-Diéguez, PI). Additional support came from the National Institute of Mental Health to the HIV Center for Clinical and Behavioral Studies at NY State Psychiatric Institute and Columbia University (P30-MH43520; Principal Investigator: Robert Remien). The content is solely the responsibility of the authors and does not necessarily represent the official views of NIH.
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Carballo-Diéguez, A., Giguere, R., Dolezal, C. et al. Rectal-Specific Microbicide Applicator: Evaluation and Comparison with a Vaginal Applicator Used Rectally. AIDS Behav 18, 1734–1745 (2014). https://doi.org/10.1007/s10461-014-0793-0
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DOI: https://doi.org/10.1007/s10461-014-0793-0