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A Phase 2 Randomized Sequence Open Label Expanded Safety and Acceptability Study of Oral Emtricitabine/Tenofovir Disoproxil Fumarate Tablet and Rectally-Applied Tenofovir Reduced-Glycerin 1% Gel

ABSTRACT: A Phase 2 Randomized Sequence Open Label Expanded Safety and Acceptability Study of Oral Emtricitabine/Tenofovir Disoproxil Fumarate Tablet and Rectally-Applied Tenofovir Reduced-Glycerin 1% Gel

PROVIDER: PRJNA576903 | ENA |

REPOSITORIES: ENA

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A Phase 2 Randomized Sequence Open Label Expanded Safety and Acceptability Study of Oral Emtricitabine/Tenofovir Disoproxil Fumarate Tablet and Rectally-Applied Tenofovir Reduced-Glycerin 1% Gel

Project description: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. 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. 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). The clinical results were reported here https://www.ncbi.nlm.nih.gov/pubmed/27986684. For the gene expression study, rectal biopsies were obtained from a subset of participants (n = 36) in the United States (Pittsburgh) and Thailand (Bangkok). Biopsies were provided at baseline and after each study period.

2020-07-07 | GSE138723 | GEO

Effect of pre-exposure prophylaxis with tenofovir disoproxil fumarate and emtricitabine on gene expression in PBMC

Project description:Pre-exposure prophylaxis (PrEP) with tenofovir disoproxil fumarate (TDF) and emtricitabine (FTC) effectively prevents infection with HIV-1. We sought to determine how use of these medications affects gene expression. We performed a small, prospective trial (https://clinicaltrials.gov/ct2/show/NCT02621242) of eight men initiating PrEP with TDF/FTC. We obtained blood before treatment initiation and after two months of daily use. We isolated RNA from cryopreserved peripheral blood mononuclear cells (PBMC). Gene expression was measured from all eight men at both time points.

2020-07-07 | GSE139609 | GEO

Effect of pre-exposure prophylaxis with tenofovir disoproxil fumarate and emtricitabine on gene expression in the blood

Project description:Pre-exposure prophylaxis (PrEP) with tenofovir disoproxil fumarate (TDF) and emtricitabine (FTC) effectively prevents infection with HIV-1. We sought to determine how use of these medications affects gene expression. We performed a small, prospective trial (https://clinicaltrials.gov/ct2/show/NCT02621242) of eight men initiating PrEP with TDF/FTC. We obtained blood before treatment initiation and after two months of daily use. We isolated RNA from whole blood (PAXgene tubes). Gene expression was measured from all eight men at both time points.

2020-07-07 | GSE139607 | GEO

Effect of pre-exposure prophylaxis with tenofovir disoproxil fumarate and emtricitabine on gene expression in the rectum

Project description:Pre-exposure prophylaxis (PrEP) with tenofovir disoproxil fumarate (TDF) and emtricitabine (FTC) effectively prevents infection with HIV-1. We sought to determine how use of these medications affects gene expression. We performed a small, prospective trial (https://clinicaltrials.gov/ct2/show/NCT02621242) of eight men initiating PrEP with TDF/FTC. We obtained rectal biopsies before treatment initiation and after two months of daily use. We isolated RNA from rectal biopsies preserved with RNAlater. Gene expression was measured from all eight men at both time points.

2020-07-07 | GSE139610 | GEO

Effect of pre-exposure prophylaxis with tenofovir disoproxil fumarate and emtricitabine on gene expression in the duodenum

Project description:Pre-exposure prophylaxis (PrEP) with tenofovir disoproxil fumarate (TDF) and emtricitabine (FTC) effectively prevents infection with HIV-1. We sought to determine how use of these medications affects gene expression. We performed a small, prospective trial (https://clinicaltrials.gov/ct2/show/NCT02621242) of eight men initiating PrEP with TDF/FTC. We obtained duodenal biopsies before treatment initiation and after two months of daily use. We isolated RNA from duodenal biopsies preserved with RNAlater. Gene expression was measured from all eight men at both time points.

2020-07-07 | GSE139608 | GEO

A Phase 2 Randomized Sequence Open Label Expanded Safety and Acceptability Study of Oral Emtricitabine/Tenofovir Disoproxil Fumarate Tablet and Rectally-Applied Tenofovir Reduced-Glycerin 1% Gel

Project description:A Phase 2 Randomized Sequence Open Label Expanded Safety and Acceptability Study of Oral Emtricitabine/Tenofovir Disoproxil Fumarate Tablet and Rectally-Applied Tenofovir Reduced-Glycerin 1% Gel

| PRJNA576903 | ENA

Effect of pre-exposure prophylaxis with tenofovir disoproxil fumarate and emtricitabine on gene expression

Project description:Effect of pre-exposure prophylaxis with tenofovir disoproxil fumarate and emtricitabine on gene expression

| PRJNA580482 | ENA

Early termination of a Phase 1 trial of tenofovir disoproxil fumarate intravaginal ring linked to inflammation

Project description:Objective: To assess safety in women of tenofovir disoproxil fumarate (TDF) polyurethane intravaginal ring (IVR) when used continuously for 3 months by healthy, HIV-uninfected, sexually active women, as compared with a placebo intravaginal ring

2020-04-13 | GSE122702 | GEO

Effect of pre-exposure prophylaxis with tenofovir disoproxil fumarate and emtricitabine on gene expression in PBMC

Project description:Effect of pre-exposure prophylaxis with tenofovir disoproxil fumarate and emtricitabine on gene expression in PBMC

| PRJNA580486 | ENA

An Open-Label Pharmacokinetic and Pharmacodynamic Assessment of Tenofovir Gel and Oral Emtricitabine/Tenofovir Disoproxil Fumarate.

Project description:The Microbicide Trials Network-017 study was undertaken to characterize the safety, acceptability, pharmacokinetic (PK), and pharmacodynamic profile of the reduced-glycerin (RG) 1% tenofovir (RG-TFV) gel compared to oral emtricitabine/tenofovir disoproxil fumarate (FTC/TDF). The study was a Phase 2, three-period, randomized sequence, open-label, expanded safety and acceptability crossover study. In each 8-week study period, HIV-1-uninfected 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. A mucosal substudy was conducted at sites in the United States and Thailand. Samples were collected to evaluate PK and ex vivo biopsy challenge with HIV-1. A total of 195 men who have sex with men and transgender women were enrolled in the parent study and 37 in the mucosal substudy. As previously reported, both products were found to be safe and acceptable. Systemic TFV concentrations were significantly higher following oral exposure and daily rectal administration compared to RAI-associated product use (p < .001). All three routes of pre-exposure prophylaxis (PrEP) administration resulted in the inhibition of explant infection (p < .05), and there was a significant inverse correlation between explant HIV-1 p24 and tissue concentrations of TFV and FTC (p < .0001). Despite significant differences in systemic and mucosal drug concentrations, all three PrEP regimens were able to protect rectal explants from ex vivo HIV infection. These data suggest that there is a rationale for co-development of oral and topical antiretroviral PrEP for HIV prevention. Clinical Trial Registration number: NCT01687218.

| S-EPMC9048169 | biostudies-literature

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