HPTN 091

Integrating HIV Prevention, Gender-Affirmative Medical Care, and Peer Health Navigation to Prevent HIV Acquisition and HIV Transmission for Transgender Women in the Americas: A Vanguard Feasibility and Acceptability Study

Study Summary
Logo of HPTN 091 study called "I Am" in blue, turquoise, and pink.

What is HPTN 091?

HPTN 091 is a study assessing the feasibility, acceptability, preliminary impact of a multi-component strategy that provides HIV prevention services, gender-affirming hormone therapy, and Peer Health Navigation to improve pre-exposure prophylaxis (PrEP) uptake and adherence.

Who is participating in HPTN 091?

This study will be enrolling about 310 transgender women (TGW), ages 18 or older, not living with HIV.

Why is HPTN 091 important?

Transgender women bear a disproportionate burden of HIV infection globally. Gender-affirming hormone therapy is an unmet need and community priority for TGW. An accepted and feasible intervention that delivers HIV prevention services with hormonal therapy could significantly impact the HIV epidemic among TGW.

What will happen during HPTN 091?

Participants will be randomized to two arms: an Immediate Intervention Arm and a Deferred Intervention Arm.

  • Immediate Intervention Arm: participants will receive PrEP provision, co-located services and Peer Health Navigation using Strengths-Based Case Management for 18 months.
  • Deferred Intervention Arm: for the first 6 months, participants will receive PrEP provision and linkage to services. From 6-18 months, participants in this arm will receive the full intervention of PrEP provision, co-located services and Peer Health Navigation using Strengths-Based Case Management.


HPTN 091 Study Design

Study Documents

HPTN 091 Version 1.0


More Study Documents

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Study Details

Protocol Status: Closed to Accrual
Study Purpose:

To assess the feasibility, acceptability, and preliminary impact of a multi-component strategy to improve pre-exposure prophylaxis (PrEP) uptake and adherence that integrates delivery of biomedical HIV prevention co-located with gender-affirming transgender care (hormonal therapy and medical monitoring) and Peer Health Navigation (PHN) using Strengths-Based Case Management (SBCM) professional supervision.

Study Design:

Multi-site, open-label study with each participant randomized 1:1 to Immediate Intervention vs. 6-month Deferred Intervention Arms. Both arms will be provided PrEP and sexually transmitted infection (STI) screening and treatment. Participants in the Immediate Intervention Arm will receive co-located gender-affirming medical care and PHN using SBCM starting at the Enrollment Visit. Participants in the Deferred Intervention Arm will receive linkage to external gender-affirming medical care and case management services during the deferred period and will transition to the study intervention six months following the Enrollment Visit.

Study Population:

Transgender Women (TGW), ages 18 or older, HIV-uninfected, at risk of acquiring HIV infection.

Study Size:

Approximately 310 HIV-uninfected TGW.

Study Duration:

For each individual site, the duration of the study is approximately 36 months from the time of site activation. Accrual will require approximately 15 months (3 months for Implementation testing and 12 months for general study); individual participants will be followed for 18 months. Once enrolled, each participant will complete eight follow-up visits.

Treatment Regimen:

The Intervention will include an approved PrEP agent (Descovy® and Truvada® in the U.S., Truvada® in Brazil), STI screening and treatment, co-located gender-affirming medical care, and PHN using SBCM.

Primary Objectives:

• To assess acceptability and feasibility of delivering integrated HIV prevention services co-located with gender-affirming hormone therapy (GAHT) and PHN using SBCM for TGW.
• To assess PrEP uptake, adherence, and persistence in both the Immediate Intervention Arm and the Deferred Intervention Arm and compare uptake, adherence and persistence of PrEP between the two arms.

Secondary Objectives:

• To determine annual incidence of HIV infection among study participants.
• To determine baseline prevalence and annual incidence of STIs (Neisseria gonorrhoeae [GC], Chlamydia trachomatis [CT], and Treponema pallidum (syphilis)) and to examine changes in STI incidence over time by study arm.
• To examine changes in sexual risk-taking behavior (e.g., number of serodiscordant or HIV-unknown serostatus sexual partners; number of condomless anal/vaginal sex episodes with these partners).
• To obtain baseline laboratory data to evaluate the cohort’s suitability for future PrEP intervention studies (e.g., prevalence of renal insufficiency, hepatitis B virus (HBV) infection, hepatitis C virus (HCV) infection, etc.).
• To identify demographic, behavioral, socioeconomic, and psychosocial factors related to: (1) PrEP uptake and PrEP adherence over time, (2) PrEP persistence, and (3) interest in future HIV research, including research involving injectable and implantable agents for PrEP among HIV-uninfected TGW.
• To assess use of medically-prescribed and non-prescription gender-affirming interventions, including exogenous hormones, soft tissue fillers/silicone, and feminizing surgeries (e.g., breast augmentation, vaginoplasty/labiaplasty, orchiectomy, etc.).

Other Objectives:

• To explore beliefs about drug interactions between gender-affirming hormonal therapy and antiretroviral (ARV) drugs used for PrEP.
• To evaluate TGW experiences of participating in an interventional study that includes biomedical and behavioral assessments, including the social impact of participation.
• To assess the safety of the intervention.
• To use laboratory assessments to characterize incident HIV infections. These assessments may include viral load testing, HIV drug resistance testing, ARV drug testing, phylogenetic analysis, and analysis of the host response to HIV infection.
• To examine the potential impact of hormonal therapy on PrEP concentrations.

Key Study Personnel

Kailazarid Gomez, LOC Clinical Research Manager
Tonia Poteat, Protocol Chair
Sari Reisner, Protocol Chair