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MTN-017: A Rectal Phase 2 Extended Safety and Acceptability Study of Tenofovir Reduced-Glycerin 1% Gel.


ABSTRACT:

Background

Human immunodeficiency virus (HIV) disproportionately affects men who have sex with men (MSM) and transgender women (TGW). Safe and acceptable topical HIV prevention methods that target the rectum are needed.

Methods

MTN-017 was a phase 2, 3-period, randomized sequence, open-label, expanded safety and acceptability crossover study comparing rectally applied reduced-glycerin (RG) 1% tenofovir (TFV) and oral emtricitabine/TFV disoproxil fumarate (FTC/TDF). In each 8-week study period participants were randomized to RG-TFV rectal gel daily, or RG-TFV rectal gel before and after receptive anal intercourse (RAI; or at least twice weekly in the event of no RAI), or daily oral FTC/TDF.

Results

MSM and TGW (n = 195) were enrolled from 8 sites in the United States, Thailand, Peru, and South Africa with mean age of 31.1 years (range 18-64). There were no differences in ≥grade 2 adverse event rates between daily gel (incidence rate ratio [IRR], 1.09; P = .59) or RAI gel (IRR, 0.90; P = .51) compared to FTC/TDF. High adherence (≥80% of prescribed doses assessed by unused product return and Short Message System reports) was less likely in the daily gel regimen (odds ratio [OR], 0.35; P < .001), and participants reported less likelihood of future daily gel use for HIV protection compared to FTC/TDF (OR, 0.38; P < .001).

Conclusions

Rectal application of RG TFV gel was safe in MSM and TGW. Adherence and product use likelihood were similar for the intermittent gel and daily oral FTC/TDF regimens, but lower for the daily gel regimen.

Clinical trials registration

NCT01687218.

SUBMITTER: Cranston RD 

PROVIDER: S-EPMC5850518 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature

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Publications

MTN-017: A Rectal Phase 2 Extended Safety and Acceptability Study of Tenofovir Reduced-Glycerin 1% Gel.

Cranston Ross D RD   Lama Javier R JR   Richardson Barbra A BA   Carballo-Diéguez Alex A   Kunjara Na Ayudhya Ratiya Pamela RP   Liu Karen K   Patterson Karen B KB   Leu Cheng-Shiun CS   Galaska Beth B   Jacobson Cindy E CE   Parikh Urvi M UM   Marzinke Mark A MA   Hendrix Craig W CW   Johnson Sherri S   Piper Jeanna M JM   Grossman Cynthia C   Ho Ken S KS   Lucas Jonathan J   Pickett Jim J   Bekker Linda-Gail LG   Chariyalertsak Suwat S   Chitwarakorn Anupong A   Gonzales Pedro P   Holtz Timothy H TH   Liu Albert Y AY   Mayer Kenneth H KH   Zorrilla Carmen C   Schwartz Jill L JL   Rooney James J   McGowan Ian I  

Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 20170301 5


<h4>Background</h4>Human immunodeficiency virus (HIV) disproportionately affects men who have sex with men (MSM) and transgender women (TGW). Safe and acceptable topical HIV prevention methods that target the rectum are needed.<h4>Methods</h4>MTN-017 was a phase 2, 3-period, randomized sequence, open-label, expanded safety and acceptability crossover study comparing rectally applied reduced-glycerin (RG) 1% tenofovir (TFV) and oral emtricitabine/TFV disoproxil fumarate (FTC/TDF). In each 8-week  ...[more]

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