Integration of Gender-Affirming Primary Care and Peer Navigation With HIV Prevention and Treatment Services to Improve the Health of Transgender Women: Protocol for a Prospective Longitudinal Cohort Study

Including transgender populations in mathematical models for HIV treatment and prevention: current barriers and policy implications

INTRODUCTION

Mathematical models of HIV have been uniquely important in directing and evaluating HIV policy. Transgender and nonbinary people are disproportionately impacted by HIV; however, few mathematical models of HIV transmission have been published that are inclusive of transgender and nonbinary populations. This commentary discusses current structural challenges to developing robust and accurate trans-inclusive models and identifies opportunities for future research and policy, with a focus on examples from the United States.

DISCUSSION

As of April 2024, only seven published mathematical models of HIV transmission include transgender people. Existing models have several notable limitations and biases that limit their utility for informing public health intervention. Notably, no models include transgender men or nonbinary individuals, despite these populations being disproportionately impacted by HIV relative to cisgender populations. In addition, existing mathematical models of HIV transmission do not accurately represent the sexual network of transgender people. Data availability and quality remain a significant barrier to the development of accurate trans-inclusive mathematical models of HIV. Using a community-engaged approach, we developed a modelling framework that addresses the limitations of existing model and to highlight how data availability and quality limit the utility of mathematical models for transgender populations.

CONCLUSIONS

Modelling is an important tool for HIV prevention planning and a key step towards informing public health interventions, programming and policies for transgender populations. Our modelling framework underscores the importance of accurate trans-inclusive data collection methodologies, since the relevance of these analyses for informing public health decision-making is strongly dependent on the validity of the model parameterization and calibration targets. Adopting gender-inclusive and gender-specific approaches starting from the development and data collection stages of research can provide insights into how interventions, programming and policies can distinguish unique health needs across all gender groups. Moreover, in light of the data structure limitations, designing longitudinal surveillance data systems and probability samples will be critical to fill key research gaps, highlight progress and provide additional rigour to the current evidence. Investments and initiatives like Ending the HIV Epidemic in the United States can be further expanded and are highly needed to prioritize and value transgender populations across funding structures, goals and outcome measures.

Acceptability of venue-based HIV testing and prevention interventions for men who have sex with transgender women and transgender women in Lima, Perú: a formative, qualitative study

BACKGROUND

Despite being at elevated risk for HIV, men who have sex with transgender women (MSTW) are an overlooked population in the global HIV response. Venue-based HIV interventions have previously had success reaching other HIV priority populations, including transgender women (TW). Similar approaches could be applied for MSTW.

OBJECTIVE

To evaluate the prospective acceptability of venue-based HIV testing and prevention interventions for MSTW and TW in Lima, Peru.

METHODS

In this exploratory qualitative study, we conducted in-depth interviews (IDI) and focus group discussions (FGD) with three types of participants: MSTW (7 IDIs, 1 FGD), TW (1 FGD), and owners of social venues frequented by MSTW/TW in Lima (2 IDIs). We elicited participants' attitudes and perceptions related to the following four hypothetical interventions delivered at social venues in Lima: rapid HIV testing; HIV self-test distribution; condom/lubricant distribution; and enrolment in a mobile app supporting HIV prevention. We performed a mixed deductive-inductive thematic analysis using the framework method, then applied the Theoretical Framework of Acceptability to classify the overall acceptability of each intervention.

RESULTS

Condom/lubricant distribution and app-based HIV prevention information were highly acceptable among all participant types. The two HIV testing interventions had relatively lower acceptability; however, participants suggested this could be overcome if such interventions focused on ensuring discretion, providing access to healthcare professionals, and offering appropriate incentives.

CONCLUSIONS

Overall, MSTW and TW shared similar favourable attitudes towards venue-based HIV interventions. Venue-based outreach warrants further exploration as a strategy for engaging MSTW and TW in HIV prevention activities.

Socio-ecological Barriers to Viral Suppression Among Transgender Women Living with HIV in San Francisco and Los Angeles, California

Troubling disparities in viral suppression persist among transgender (trans) women living with HIV in the US. We utilized baseline data from a randomized controlled trial of a behavioral intervention among trans women living with HIV in San Francisco and Los Angeles, to identify the socio-ecological correlates of biologically confirmed viral suppression (< 200 HIV-1 RNA copies/mL). Among 253 participants, the mean age was 43 (SD = 11), 46% identified as Black or African American and 35% were virally non-suppressed. In adjusted Poisson regression models, the following barriers to viral suppression were identified: injection drug use [adjusted risk ratio (aRR) 0.78, 95% CI 0.65-0.93, Z = - 2.64, p = 0.008], methamphetamine use (aRR 0.65, 95% CI 0.51-0.83, Z = - 3.45, p = 0.001), amphetamine use (aRR 0.62, 95% CI 0.44-0.87, Z = - 2.75, p = 0.006), homelessness (aRR 0.79, 95% CI 0.63-0.98, Z = - 2.06, p = 0.039), and sex work (aRR 0.60, 95% CI 0.41-0.86, Z = - 2.77, p = 0.009). These findings underscore the importance of interventions that address the socio-ecological barriers to viral suppression among trans women in urban settings.

Hormone Prescription and HIV Screening/Preventive Practices Among Clinicians Providing Care for Transgender Individuals

Purpose

Through a survey-based approach, we sought to investigate regional differences in gender-affirming hormone therapy (GAHT) prescribing practices, as well as HIV screening and prevention practices among clinicians providing care to transgender individuals.

Methods

Our survey was disseminated between December 2019 and January 2021 to clinicians who prescribe GAHT within New England (United States). Between-group differences in GAHT prescribing and HIV screening/prevention practices were evaluated by practice setting and subspecialty.

Results

Of the 20 survey respondents, 55% practiced in health care settings affiliated with an academic institution, 45% practiced in a community-based health care setting, and 30% were Endocrinologists. Clinicians in community-based health care settings reported more frequently prescribing oral 17β-estradiol (p=0.02) and spironolactone (p=0.007) for feminizing GAHT compared with clinicians in health care settings affiliated with an academic institution, who reported more frequently prescribing leuprolide (p=0.03). For masculinizing GAHT, clinicians from health care settings affiliated with an academic institution reported more frequently prescribing topical testosterone (p=0.03). There were no significant between-group differences in reported barriers to initiation or reasons for stopping GAHT. While non-Endocrinologists reported "often" or "always" offering HIV screening, most Endocrinologists reported "rarely" or "never" offering HIV screening and "rarely" or "never" offering pre-exposure or postexposure prophylaxis to their transgender patients.

Conclusions

Regional GAHT prescribing practices varied by setting. Additional research is needed to better understand whether these differences translate to differences in GAHT efficacy and side-effects. Further, HIV screening/prevention practices varied by subspecialty. Integrated GAHT and HIV screening/prevention across subspecialties could help reduce the disproportionate burden of HIV faced by the transgender community.

Decision-Making at the Intersection of Risk and Pleasure: A Qualitative Inquiry with Trans Women Engaged in Sex Work in Lima, Peru

To inform culturally relevant HIV prevention interventions, we explore the complexity of sex work among Peruvian transgender women. In 2015, we conducted twenty in-depth interviews and demographic surveys with transgender women in Lima, Peru to examine how transgender women enact individual- and community-level resistance strategies within a context of pervasive marginalization. Although 40% self-identified as "sex workers," 70% recently exchanged sex for money. Participants described nuanced risk-benefit analyses surrounding paid sexual encounters. Classification of clients as "risky" or "rewarding" incorporated issues of health, violence, and pleasure. Interviews highlighted context-informed decision-making (rejecting disrespectful clients, asserting condom use with specific partner types) demonstrating that motivations were not limited to HIV prevention or economic renumeration, but considered safety, health, attraction, gender validation, hygiene, and convenience. These findings underscore the complex risk assessments employed by Peruvian trans women. These individual-level decision-making and context-specific health promotion strategies represent critical frameworks for HIV prevention efforts.

HIV transmission patterns among transgender women, their cisgender male partners, and cisgender MSM in Lima, Peru: A molecular epidemiologic and phylodynamic analysis

BACKGROUND

Transgender women (TW) in Peru are disproportionately affected by HIV. The role that cisgender men who have sex with TW (MSTW) and their sexual networks play in TW's risk of acquiring HIV is not well understood. We used HIV sequences from TW, MSTW, and cisgender men who have sex with men (MSM) to examine transmission dynamics between these groups.

METHODS

We used HIV-1 pol sequences and epidemiologic data collected through three Lima-based studies from 2013 to 2018 (n = 139 TW, n = 25 MSTW, n = 303 MSM). We identified molecular clusters based on pairwise genetic distance and used structured coalescent phylodynamic modeling to estimate transmission patterns between groups.

FINDINGS

Among 200 participants (43%) found in 62 clusters, the probability of clustering did not differ by group. Both MSM and TW were more likely to cluster with members of their own group than would be expected based on random mixing. Phylodynamic modeling estimated that there was frequent transmission from MSTW to TW (67·9% of transmission from MSTW; 95%CI = 52·8-83·2%) and from TW to MSTW (76·5% of transmissions from TW; 95%CI = 65·5-90·3%). HIV transmission between MSM and TW was estimated to comprise a small proportion of overall transmissions (4·9% of transmissions from MSM, and 11·8% of transmissions from TW), as were transmissions between MSM and MSTW (7·2% of transmissions from MSM, and 32·0% of transmissions from MSTW).

INTERPRETATION

These results provide quantitative evidence that MSTW play an important role in TW's HIV vulnerability and that MSTW have an HIV transmission network that is largely distinct from MSM.

Coronary Vasculature and Myocardial Structure in HIV: Physiologic Insights From the Renin-Angiotensin-Aldosterone System

The landscape of HIV medicine dramatically changed with the advent of contemporary antiretroviral therapies, which has allowed persons with HIV (PWH) to achieve good virologic control, essentially eliminating HIV-related complications and increasing life expectancy. As PWH are living longer, noncommunicable diseases, such as cardiovascular disease (CVD), have become a leading cause of morbidity and mortality in PWH with rates that are 50% to 100% higher than in well-matched persons without HIV. In this review, we focus on disease of the coronary microvasculature and myocardium in HIV. We highlight a key hormonal system important to cardiovascular endocrinology, the renin-angiotensin-aldosterone system (RAAS), as a potential mediator of inflammatory driven-vascular and myocardial injury and consider RAAS blockade as a physiologically targeted strategy to reduce CVD in HIV.

"I've Learned to Value Myself More": Piloting an Adapted Multilevel Intervention for Transgender Women Sex Workers Living with HIV in the Dominican Republic

Purpose: Transgender (trans) women living with HIV experience suboptimal care and treatment outcomes. We adapted a multilevel intervention to improve HIV outcomes and overall well-being among trans women sex workers living with HIV. The intervention, called Abriendo Puertas (AP; Opening Doors), included: individual counseling, peer navigation, and community mobilization "open houses." The purpose of this article is to describe acceptability and initial outcomes of the adapted AP pilot and explore intervention experiences to inform recommendations for improvement. Methods: After an iterative adaptation process, we recruited 30 trans women sex workers living with HIV to participate in the pilot. We conducted baseline and endline (12-months) surveys to compare HIV care and treatment outcomes and qualitative interviews to assess intervention experiences with a subsample (n=20). Results: Intervention retention was high, with 86.7% of participants (n=26/30) completing both baseline and endline surveys. At endline, there was a significant increase in current anti-retroviral therapy (ART) use (70.0% to 84.6%, p<0.03) and positive, but not significant, trends in missed care appointments in the past 6 months (34.5% to 20.0%, p<0.39) and not having missed any ART doses in the past 4 days (85.7% to 95.5%, p<0.50). Intervention acceptability was high across all components: individual counseling (96.1%), peer navigation (80.8%), and open houses (84.6%). Participants emphasized that trust and being treated with respect allowed them to relax and improve their self-esteem. Limited trust and cohesion among trans women, however, limited more extensive engagement with peer navigation and community mobilization components. Conclusion: Future efforts to strengthen the AP intervention with trans women sex workers should continue to address emotional, instrumental, and informational support needs related to living with HIV through individual counseling, peer navigation, and open houses while also enhancing group-level activities to build trust and generate a collective commitment to promote the well-being of the community.

HIV pretreatment drug resistance among cisgender MSM and transgender women from Lima, Peru

INTRODUCTION

Transmitted, or any pretreatment drug resistance (TDR, PDR) can compromise efficacy of first-line antiretroviral therapy (ART). In Peru, genotypic resistance testing is not routinely performed before ART initiation, and estimated PDR prevalence prior to 2012 ranged from 1.0% to 4.7%. We aimed to update estimates of PDR prevalence in men who have sex with men (cis-MSM) and transgender women (TW).

METHODS

We obtained HIV sequences from three studies of ART-naïve cisgender-MSM and TW (n = 470) in Lima, Peru from 2013 to 2017, almost two-thirds of whom had acute or recent infections. Sanger sequences of HIV pol were interrogated for surveillance drug resistance mutations (SDRM) using the Stanford Calibrated Population Resistance (CPR) tool and scored for resistance to nucleoside reverse transcriptase inhibitors (NRTIs) and non-nucleoside reverse transcriptase inhibitors (NNRTIs) with the HIVdb programme. We calculated binomial proportions and 95% confidence intervals. χ2 and exact or trend tests were used to examine predictors of PDR.

RESULTS

Seventy-seven (16.4%) individuals had PDR (95% CI: 13.2 to 20.0); most resistance was likely TDR since 63% were incident infections. SDRM were present in 9.8% (7.3 to 12.9). Resistance to any NRTI was present in <1% of individuals, while efavirenz resistance was present in 10% (6.9% to 12.4%). TW were not statistically more likely than cis-MSM to have PDR (11.4% vs. 9.1%, p = 0.54). Age, incident versus prevalent infection, or residence district did not predict PDR. Prevalence of SDRM increased from 3% in 2013 to 21% 2017 within incident infections (p = 0.04), but not when including prevalent infections.

CONCLUSIONS

Prevalence of NNRTI resistance in three studies of ART-naïve MSM and TW in Lima, Peru reaches 10%. Because our study reports PDR in a population in which most acquired HIV recently, the overall prevalence of PDR, including previously treated persons, is likely underestimated. These results underscore the need for a nationally representative survey of PDR in Peru and consideration of non-NNRTI anchored first-line ART options. This study also represents the first evaluation of PDR in cis-MSM versus TW in South America, and demonstrates that, although TW are at higher risk of acquiring HIV, they are at similar risk of acquiring a virus with resistance mutations.