Publications by authors named "Renee Heffron"

: High rates of sexually transmitted infections (STIs) increase HIV transmission risk among adolescent girls and young women (AGYW) in South Africa. AGYW prefer discreet self-testing options for HIV and pregnancy; however, other STI self-testing options are currently unavailable in this region. : Seven (CT), (NG) and (TV) assays were validated for AGYW self-test use (using self-collected vaginal samples) in a cross-sectional study (PROVE).

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Introduction: New longer-acting antiretroviral (ARV) drugs-that is single doses with antiviral activity for at least a month-are being utilized for HIV treatment and pre-exposure prophylaxis (PrEP) but have not been explored for post-exposure prophylaxis (PEP). A "one-and-done" simplification of PEP has the potential to serve the HIV prevention needs of individuals not being met with traditional services and expand overall biomedical HIV prevention coverage. We discuss challenges with the assessment of PEP effectiveness in human trials and potential study designs that could generate evidence needed to inform the use of new, single-administered, long-acting ARVs for PEP.

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Aim: To share insights on Implementation Science (IS) methods, challenges, solutions, and best practices derived from the second National Meeting for Research and Community Collaboration toward "Ending the HIV Epidemic (EHE) in the United States."

Methods: This 2022 hybrid, one-day conference featured presentations from 13 projects funded as NIH supplements to CFARs and ARCs between 2019 and 2022. Selected for their robust findings, projects were grouped into four topics: (1) community-based outreach strategies, (2) taking the clinic to the community, (3) strategies to improve clinical care, and (4) exploring intersectional vulnerabilities and social/structural determinants of health.

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Background: Partners of people living with HIV (PLHIV) at high risk of HIV acquisition are a target population who may benefit from innovative HIV testing strategies. We explored the effectiveness of the secondary distribution of HIVST kits by PLHIV enrolled in HIV care to catalyze testing and linkage to care.

Methods: A prospective interventional study was conducted at four Kenyan HIV clinics deploying two testing strategies sequentially to reach sexual partners of PLHIV: 1) invitation by PLHIV for clinic-based testing and 2) distribution of HIVST kits by PLHIV.

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Longer acting HIV pre-exposure prophylaxis (PrEP) products are effective options for HIV prevention that require less user-dependence. As programs are preparing to launch delivery of these longer acting products, it is important to understand users' needs and preferences. We conducted a cross-sectional study among women seeking services at 12 family planning clinics in Kisumu, Kenya.

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Introduction: Oral HIV pre-exposure prophylaxis (PrEP) is highly effective, but adherence is challenging for young women. Products centred around women's preferences could address adherence barriers. Using a longitudinal discrete choice experiment (DCE), we examined young African women's preferences around PrEP product formulation and delivery attributes before and after initiating oral PrEP.

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Antiretroviral therapy (ART) use and HIV suppression among people living with HIV (PLHIV) are critical for HIV control and prevention. Extreme restrictions on movement early during the COVID-19 pandemic in Uganda may have impeded the ability to initiate and sustain access to and use of ART. From our stepped-wedge cluster-randomized trial of an integrated PrEP and ART intervention for HIV-serodifferent couples at 12 ART clinics in Uganda, we identified participants who enrolled and had a 6-month post-ART initiation viral load measured before the beginning of the first COVID-19 lockdown (Period 1), participants whose enrollment and 6-month viral load measurement straddled pre-COVID and COVID lockdown times (Period 2), and participants whose enrollment and 6-month viral load were quantified entirely during COVID-19 (Period 3).

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Background: Injectable depot medroxyprogesterone acetate (DMPA) is the most common contraceptive choice among young women in Uganda, where HIV burden is high and HIV preexposure prophylaxis (PrEP) may be offered. For young women who choose to use both agents concurrently, it is unknown whether they will experience declines in bone mineral density (BMD) beyond those elicited by either product singly.

Methods: From 2018 to 2022, we conducted a 2-year prospective study with women ages 16-25 years in Kampala, Uganda desiring pregnancy and HIV prevention.

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Adolescent girls and young women (AGYW) seeking post-abortal care (PAC) remain at risk of unintended pregnancies and HIV due to infrequent condom use. Integrating HIV prevention services, such as PrEP, into PAC services offers an opportunity to enhance reach, uptake, and efficiency, particularly in high-burden settings like Kenya. However, data on acceptability, feasibility, and sustainability of PAC clinics as entry points for PrEP is limited.

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Objective: Human papillomavirus (HPV) vaccines and DNA testing roll out in resource-constrained settings. We evaluated the natural history of HPV infections in African women to contribute to normative guidance.

Methods: Women aged 16 to 35 years were enrolled from 3 sites in South Africa and Kenya and followed quarterly for 18 months.

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Introduction: Adolescent girls and young women (AGYW) account for two-thirds of new HIV infections in Africa. African AGYW have had high uptake of oral HIV pre-exposure prophylaxis (PrEP) but low adherence, which might be improved by point-of-care adherence monitoring with tailored counselling.

Methods: From August 2022 to July 2023, we conducted a PrEP demonstration project with sexually active AGYW ages 16-30 years from 20 sites in South Africa, Eswatini, Kenya, Malawi, Uganda and Zambia.

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Background: Despite high oral pre-exposure prophylaxis (PrEP) uptake among young heterosexual cisgender women, early discontinuation is frequent. It is unclear whether this aligns with potential HIV exposure.

Methods: Young women aged 16-25 years and ≥1 of their male partners were enrolled in separate but linked longitudinal HIV PrEP studies in Kampala, Uganda, from 2018 to 2021.

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Introduction: PrEP, a highly effective HIV prevention measure, provides autonomy to individuals in managing their HIV acquisition vulnerability. Despite its availability in tenofovir-based oral pills and injectable cabotegravir formulations, PrEP uptake among Black cisgender women in the U.S.

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Background: Longer-acting cabotegravir (CAB) is a novel, safe, and efficacious pre-exposure prophylaxis (PrEP) for HIV prevention. As we near a time for CAB scale-up, the experience of global leaders in PrEP research and implementation can be leveraged to identify optimal strategies for scaling and integrating CAB into existing PrEP infrastructure worldwide.

Methods: We recruited leaders of HIV prevention clinical trials and large PrEP programs through a combination of purposive and snowball sampling for participation in individual interviews.

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Article Synopsis
  • Product adherence significantly impacts the accurate evaluation of HIV-1 prevention methods like the dapivirine vaginal ring, with varying levels of adherence leading to biased efficacy estimates.* -
  • In the MTN-020/ASPIRE trial, per-protocol analyses indicated a 30.8% efficacy, while those with the highest adherence showed an efficacy of 53.6% when analyzing drug release from the ring.* -
  • Advanced statistical methods, such as principal stratification and marginal structural models, enhance our understanding of HIV-1 prevention effectiveness in clinical trials by adjusting for adherence levels.*
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Article Synopsis
  • - The study aimed to assess the effectiveness of a new point-of-care urine tenofovir (POC TFV) test in improving the accuracy of self-reported adherence to preexposure prophylaxis (PrEP) among sexually active HIV-negative women in Uganda.
  • - Over 24 months, participants who took the test reported higher rates of low PrEP adherence and condomless sex during visits with the test compared to those without it, indicating that the test may encourage more honest self-reporting.
  • - The accuracy of self-reported PrEP adherence significantly increased when the POC TFV test was utilized, suggesting that the test could foster better communication between patients and healthcare providers.
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Purpose Of Review: This review summarizes differentiated service delivery (DSD) models for HIV treatment and prevention that have been adapted for maintaining continuity of services during the COVID-19 pandemic and proposes strategies for sustaining their benefits now and during future disruptions.

Recent Findings: The COVID-19 pandemic resulted in an overburdened and disrupted health system, forcing countries to adopt and/or scale up DSD models for HIV services. While initially implemented as emergency measures, these models evolved and were refined over time to fit recipient needs ensuring continued HIV treatment and prevention services with minimal health system impact.

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Article Synopsis
  • * Successful referrals for support services were positively associated with provider awareness and client engagement, but barriers like financial constraints and socio-cultural norms hindered full implementation.
  • * The study underscores the importance of GBV screening in HIV care, suggesting that increasing awareness and addressing socio-cultural barriers could enhance outcomes for clients facing violence.
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Article Synopsis
  • Adolescent girls and young women in Africa are highly interested in using pre-exposure prophylaxis (PrEP) for HIV prevention but face challenges in maintaining consistent usage; understanding their preferences for PrEP delivery methods is crucial to improving access.
  • The POWER implementation study in Cape Town examined how AGYW (ages 16-25) accessed PrEP from various platforms, including mobile clinics, government facilities, courier services, and community-based youth clubs, collecting data through in-depth interviews.
  • Findings revealed four behavioral profiles among PrEP-users: "Social PrEP-users" seek peer support, "Convenient PrEP-users" prefer accessible and quick services, and "Independent PrEP-users" value control over delivery times, indicating diverse needs
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Article Synopsis
  • * The Partners PrEP Program in Uganda integrated PrEP with ART services, revealing important implementation processes through qualitative interviews with couples and healthcare providers.
  • * Key factors for successful integration included high-quality training, supportive teamwork, and effective communication from providers, although barriers like lack of disclosure and retention issues also arose.
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  • The study implemented PrEP for HIV prevention across 14 post-abortion care clinics in Kenya, enrolling AGYW aged 15 to 30 and measuring the impact of stigma on their contraceptive and PrEP usage.
  • Findings showed high levels of both abortion and PrEP stigma; while many continued PrEP, stigma influenced contraception initiation, suggesting that stigma-informed counseling is crucial in improving AGYW's sexual health decisions.
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  • In Uganda, people who inject drugs (PWID) face significant barriers to healthcare and have a high risk of HIV, highlighting the need for integrated pre-exposure prophylaxis (PrEP) and harm reduction services to better meet their needs.* -
  • The study involved semi-structured interviews with 41 PWID in Kampala from May 2021 to March 2023, focusing on their experiences with harm reduction services and motivations for using them, employing purposive and snowball sampling methods.* -
  • Findings showed that while participants were aware of their HIV risk and knew about harm reduction services like sterile needle distribution, many struggled with treatment adherence, and awareness of PrEP was limited; however, they supported its integration into existing services
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Article Synopsis
  • Integrating PrEP with ART programs helps prevent HIV transmission in couples where one partner is HIV-positive before achieving viral suppression.
  • The study developed a 24-item scale to measure behavioral modeling among these couples, focusing on how partners influence each other's medication habits.
  • A five-factor model was identified, showing that behaviors like attention to partner actions and relationship quality impact medication adherence, highlighting the importance of partner influence in HIV prevention strategies.
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Article Synopsis
  • Adolescent girls and young women (AGYW) in East and southern Africa face high rates of HIV infection, and integrating pre-exposure prophylaxis (PrEP) in existing healthcare services, like post-abortion care, is essential to address this issue.* ! -
  • A study conducted in Kenya from March 2021 to November 2022 found that 57.4% of AGYW were offered PrEP, with 14.1% actually starting it; factors like consistent PrEP supply and staff training played significant roles in increasing both offers and uptake of PrEP.* ! -
  • Successful integration of HIV prevention into reproductive health services will depend on strengthening healthcare systems and ensuring consistent availability of necessary resources like Pr
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Article Synopsis
  • Oral PrEP is recommended for at-risk pregnant cisgender women, but it may negatively impact bone health, which is already affected by pregnancy.
  • The study followed 499 young women using PrEP and measured bone mineral density (BMD) over 24 months, noting that 67% of pregnant women continued using PrEP.
  • Results showed that women on PrEP during pregnancy had significantly lower BMD compared to non-pregnant women or pregnant women who didn't use PrEP, and adherence to PrEP decreased during pregnancy.
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Synopsis of recent research by authors named "Renee Heffron"

  • - Renee Heffron's research focuses on the intersection of HIV prevention strategies, particularly involving pre-exposure prophylaxis (PrEP) and the implications of gender-based violence on treatment adherence among vulnerable populations, including adolescent girls and young women in sub-Saharan Africa.
  • - Recent studies include evaluations of new delivery models for long-acting HIV prevention methods like cabotegravir and dapivirine, as well as the integration of PrEP within existing healthcare frameworks, especially in contexts affected by crises such as the COVID-19 pandemic.
  • - Heffron's work also investigates psychosocial factors, such as stigma and depression, that affect health behaviors and adherence to PrEP and related therapies, providing insights into optimizing healthcare interventions in diverse settings.