Factors Associated with Preferences for Long-Acting Injectable Antiretroviral Therapy Among Adolescents and Young People Living with HIV in South Africa

Bridging the gap: identifying barriers and strategies for widespread implementation of long-acting injectable antiretroviral therapy in Sub-Saharan Africa: a scoping review

BACKGROUND

Long-acting injectable antiretroviral therapy (LAI ART) is a new, and innovative approach to HIV treatment, designed to address several challenges, including the adherence issues associated with daily oral ART. This review synthesizes existing literature on the barriers and strategies for implementing LAI ART in the sub-Saharan Africa region, while identifying key knowledge gaps and research priorities.

METHODS

We performed a comprehensive literature search, encompassing electronic databases and grey literature sources. Our review included 18 studies published between 2014 and 2023, focusing on the acceptability, feasibility, effectiveness, and cost-effectiveness of LAI ART in SSA. A narrative synthesis approach was employed for reporting review findings.

RESULTS

Our review revealed a high demand and acceptability of LAI ART among people living with HIV in SSA, particularly those facing stigma and discrimination. LAI ART can improve adherence, retention, and viral suppression while reducing pill burden and frequent clinic visits. Implementation challenges include lack of regulatory approval, high cost, limited supply chain, health system capacity, trained staff, and cold storage facilities. Further research on safety and efficacy, as well as efforts in advocacy, policy, and community engagement, are needed to ensure accessibility and equity.

CONCLUSION

This review highlights key knowledge gaps and research priorities essential for the successful implementation of LAI ART in sub-Saharan Africa. Addressing these gaps such as evaluating long-term outcomes, understanding drug resistance, and exploring the impact on sexual and reproductive health will be critical to ensuring the broader accessibility, effectiveness, and sustainability of LAI ART in the region. Further research on the experiences and preferences of different subgroups, as well as the interaction with other medications and co-infections, is also needed to inform tailored implementation strategies.

CLINICAL TRIALS NUMBER

Not applicable.

Ethical issues surrounding the implementation of long-acting injectable antiretroviral therapy in sub-Saharan Africa

BACKGROUND

This article discusses the ethical issues surrounding the integration of long-acting injectable antiretroviral therapy (LA-ART) in the programmatic management of human immunodeficiency virus (HIV). As the medical landscape evolves, implementing LA-ART introduces many ethical issues that should be considered for the success of scale-up in diverse settings.

METHODS

This article examines key issues such as bioethical concerns around the rollout of LA-ART, including regulatory requirements, a person's autonomy, informed consent, privacy and confidentiality; the societal implications of providing LA-ART, including the impact on stigma and discrimination; ethics around who receives LA-ART, financial accessibility, equitable access, inclusive decision-making and cultural sensitivity; and the ethics of providing an expensive intervention, including cost-effectiveness, supply chain sustainability and resource allocation. By critically analysing the ethical issues, we aim to guide policymakers and identify areas for further research.

CONCLUSION

Our overarching aim is to ensure that the rights of people living with HIV are protected as implementors plan for the rollout of LA-ART with a focus on eastern and southern Africa. The utilization of LA-ART in resource-limited settings poses significant ethical challenges, necessitating careful consideration of autonomy, access and equity, stigma, discrimination, sustainability and treatment adherence.

Acceptability and perspectives on clinic-based urine tenofovir testing for antiretroviral therapy adherence monitoring: qualitative findings from a randomized controlled trial in South Africa

Real-time, urine tenofovir testing may allow for clinic-based monitoring of adherence to antiretroviral therapy (ART). We aimed to assess (1) the acceptability of monthly point-of-care urine tenofovir testing over the first five months following ART initiation and (2) perspectives on the implementation of point-of-care urine tenofovir testing among people living with HIV (PLWH) and healthcare providers participating in a randomized controlled trial which used the urine test in South Africa. We conducted in-depth interviews with 20 PLWH six-months post-ART initiation and with eight healthcare providers. We assessed the acceptability (using constructs from the Theoretical Framework of Acceptability), appropriateness, feasibility, and willingness to use the point-of-care urine tenofovir test, as well as participants' preferred form of adherence monitoring and perspectives on differentiated implementation strategies. Participants found monthly point-of-care tenofovir testing highly acceptable, preferrable to self-reported adherence measures, appropriate for this population, and potentially feasible to integrate with standard-of-care ART monitoring. Participants' overall acceptability of routine urine tenofovir testing was shaped by experiences and perceptions that shaped their overall acceptability. Routine urine tenofovir testing was well-liked, perceived to be low-burden with few opportunity costs, and perceived to have several positive effects. These included encouraging consistent ART adherence, strong client-provider relationship and communications, and accurate self-reporting of adherence. Participants' desire to impress and build trust with their provider motivated them to take their ART daily to achieve a positive adherence test result at each clinic visit. Overall, point-of-care urine tenofovir testing may be an acceptable and beneficial tool for motivating optimal adherence, improving ART adherence monitoring, and strengthening client-provider relations.

D-peptide hydrogels as a long-acting multipurpose drug delivery platform for combined contraception and HIV prevention

New multipurpose prevention technology products for use by women, focused on reducing HIV infection and preventing unwanted pregnancies, are a global health priority. Discreet long-acting formulations will empower women with greater choice around their sexual health. This paper outlines the development of a long-acting technology that enables multiple drugs to be incorporated within one injectable platform. This fixed-dose combination product is formed from a phosphorylated D-peptide (naphthalene-2-ly)-acetyl-diphenylalanine-lysine-tyrosine-glycine-OH (Napffky(p)G-OH) that enables the highly hydrophobic drugs MIV-150 (HIV antiretroviral) and etonogestrel (contraceptive) to be solubilized together within aqueous solvents. Upon subcutaneous injection, this D-peptide-drug combination self-assembles in response to phosphatase enzymes present within the skin space to form an in situ forming drug-releasing hydrogel depot. Oscillatory rheology confirmed the formation of hydrogels, which began within ∼10 s exposure to 3.98 U/mL phosphatase enzymes and continued for ∼198 mins for a Napffk(MIV-150)y(p)G-OH + Napffk(ENG)y(p)G-OH combination (8:2 ratio). Biostability against proteases, an important consideration for long-acting injectables, was demonstrated for at least 28 days in vitro. Covalent attachment of each drug to the D-peptide via an ester linkage enabled sustained release of the drug in an unmodified form via hydrolysis of the D-peptide-drug linker. This significantly reduced the initial drug burst. Low toxicity was also demonstrated in vitro via cell culture (MTS, LHS, Live/Dead®) and within in vivo studies (H&E staining). The fixed dose combination was able to deliver clinically relevant concentrations of each drug to Sprague-Dawley rats for at least 49 days, providing proof-of-concept for the use of hydrogel-forming D-peptides (Napffky(p)G-OH) as a long-acting injectable platform for the delivery of multiple hydrophobic drugs.

Perceived benefits and barriers to the use of long-acting injectable antiretroviral treatment among adolescents and young people living with HIV in Western Kenya: qualitative findings from the KuwaFree! LiveFree! Study

Introduction

Adolescents and young people living with HIV (AYPLHIV) face significant hurdles in adhering to daily oral antiretroviral therapy (ART). Long-acting (LA) ART, such as injectable cabotegravir and rilpivirine, may help overcome these hurdles. However, little is known about the perceived benefits and barriers to LA ART usage by AYPLHIV in resource-limited settings.

Methods

We conducted focus group discussions (FGDs) with four target groups of adolescents/youth, providers, policymakers, and other advocates in western Kenya from November 2021 to April 2022. The FGDs elicited participants' thoughts on LA ART implementation in Kenya, particularly the benefits and barriers of LA ART use amongst AYPLHIV. Our analysis combined both inductive and deductive approaches, beginning with open coding of the data, then organizing them in predetermined socio-ecological model (SEM) domains.

Results and discussion

We conducted a total of seven FGDs with 58 participants across four stakeholder groups: AYPLHIV (2 FGDs, n = 14), healthcare providers (2 FGDs, n = 19), health/youth advocates (2 FGDs, n = 16), and policymakers (1 FGD, n = 9). We identified several benefits, largely centered around the individual and interpersonal level, as well as barriers, largely centered around the health systems levels. Participants viewed LA ART as a welcome alternative to oral ART due to benefits like improved adherence, reduced pill burden, increased convenience, enhanced privacy, decreased stigma, lower risk of accidental disclosure, and convergence in using LA contraception. At the interpersonal level, LA ART was valued for furthering relationships, especially for AYPLHIV (e.g., dating). At the health systems level, LA ART expanded first-line treatment options. Conversely, barriers to health systems integration included conflicts with service models, increased clinic burden, supply chain issues, and waste disposal. Individual-level barriers included fears of injections, side effects, concerns about a new drug, and reduced effectiveness if mixing LA ART with oral ART.

Conclusions

The perceived benefits of LA ART for AYPLHIV, centering on individual and interpersonal levels of positive impacts, appear in tension with the anticipated barriers for health systems readiness in Kenya. While the prospect of offering LA ART is overwhelming positive, country programs will have to invest in health systems readiness before rolling out LA ART.

Brief Report: Stated Preferences for Long-Acting Injectable ART Among Mobile Men Living With HIV in Malawi: A Qualitative Study

BACKGROUND

Long-acting injectable (LAI) antiretroviral medications are as effective as daily oral antiretroviral therapy (ART) and offer discreet, less frequent dosing. LAIs may be ideal treatment options for people who experience challenges with adherence to daily oral ART, including mobile men living with HIV (MLHIV).

METHODS

We conducted a qualitative substudy within two parent trials in 24 health facilities in Malawi that enrolled MLHIV ≥15 years not on ART. We conducted in-depth interviews with a stratified random sample of participants who had taken oral ART and self-reported mobility (travel) during the 6-month study (≥1 trip of ≥3 nights). Interviews described cabotegravir/rilpivirine and asked about clients' stated preferences for LAI vs. oral ART and their reasoning. Interviews were translated, transcribed, coded in Atlas.ti, and analyzed using framework analysis.

RESULTS

We interviewed 29 mobile MLHIV from July 1, 2022, to August 30, 2022, median age 36 years (interquartile range: 31-41), mean 28 nights away in the past 6 months (SD: 40). Nearly all participants (26/29) expressed a preference for LAI over daily oral ART because LAI would reduce the risks of forgetting to take pills and unwanted disclosure. Three men preferred oral ART primarily because of fear of side effects from a new medication. A few men reported they would change their preference if injection site reactions prevented them from working.

CONCLUSIONS

Mobile MLHIV in Malawi with previous ART adherence challenges expressed strong stated preferences for LAI over daily oral ART. Further research is needed to understand implementation challenges and potential effectiveness of LAI among harder-to-reach populations.

Adolescents and young adults with HIV and unsuppressed viral load: where do we go from here?

PURPOSE OF REVIEW

Adolescents and youth living with HIV (AYLHIV) have worse outcomes at all stages of the care cascade when compared with adults, yet adolescents and youth with unsuppressed viral load are typically excluded from phase 3 studies of novel HIV therapeutic agents and emerging strategies. Long-acting agents have the potential to radically change outcomes for young people struggling with adherence to daily oral HIV medications.

RECENT FINDINGS

1.5 million children aged less than 15 years live with HIV and more than 100 000 acquire HIV perinatally every year. Adolescents and youth aged 10-24 years comprise ∼40% of global incident HIV infections. Rates of viral suppression among AYLHIV vary markedly from 44 to 88%, resulting in morbidity and risks of transmission to partners and infants. Virological failure is mostly due to poor adherence, and AYLHIV express high levels of interest and acceptability of alternatives to oral daily medications, such as long-acting antiretroviral formulations. Emerging data regarding their use in populations with unsuppressed viral load are encouraging.

SUMMARY

AYLHIV, including populations without virologic suppression, must be prioritized for the programmatic implementation and research of long-acting HIV drugs and other therapeutic strategies to prevent morbidity and mortality and to ultimately end the HIV epidemic.

Barriers and facilitators to equitable implementation of long-acting ART for adolescents and youth with HIV in low- and middle-income settings

Recent approvals of long-acting (LA) antiretroviral treatment (ART) support an innovative alternative to daily oral pills that can improve adherence and treatment outcomes among adolescents and youth (AY) with HIV. We solicited stakeholder feedback on the implementation of LA ART for AY in low-and middle-income countries (LMICs) through a consensus-building forum at the 2022 International Workshop on HIV and Adolescence. We used the nominal group technique to generate, record, discuss, vote on, and rank perceived barriers and facilitators to implementing LA ART for AY. All in-person attendees were invited to participate and were assigned to six groups, each representing an intentional mix of AY, clinicians, researchers, program implementers, and policymakers. We collected self-reported de-identified demographics and group rankings of barriers and facilitators. Responses were coded and categorized using the social-ecological model's five levels of influence. One hundred and thirty-seven (137) Workshop delegates (67.9% male, 27.7% female; 0.7% non-binary, and 46.7% less than 35 years old) participated in the group discussions. A large proportion of participants (51.9%) reported working in public health/program implementation. Most participants (88.4%) were from and/or worked in the African region. We identified 55 barriers and 48 facilitators of LA ART implementation and ranked them in social-ecological categories of public policy, community, institutional/organizational, interpersonal, and individual levels. The highest number of ranked barriers was at the institutional/organizational level. The themes of "equitable access" and "choices of ART" were cross-cutting across individual and interpersonal levels. Other cross-cutting themes were the "cost of LA ART" and the "need for funding and sustainability of LA ART programs". Proposed facilitators addressed identified barriers at each social-ecological level of influence and emphasized peer engagement. Our nominal groups identified key barriers and proposed facilitators at five different social-ecological levels, which can inform implementation science-guided design and equitable implementation of youth-centered LA ART in LMICs and globally.

Longitudinal Trajectories of Antiretroviral Treatment Adherence and Associations With Durable Viral Suppression Among Adolescents Living With HIV in South Africa

BACKGROUND

Compared with other age groups, adolescents living with HIV (ALHIV) are estimated to have lower levels of adherence to antiretroviral treatment. Despite this, we lack evidence on adolescents' adherence patterns over time to inform the customization of intervention strategies.

SETTING

Eastern Cape province, South Africa.

METHODS

We analyzed data from a cohort of ALHIV (N = 1046, aged 10-19 years at baseline) recruited from 53 public health facilities. The cohort comprised 3 waves of data collected between 2014 and 2018 and routine viral load data from the National Institute for Communicable Disease data warehouse (2014-2019). Durable viral suppression was defined as having suppressed viral load (<1000 copies/mL) at ≥2 consecutive study waves. Group-based multitrajectory model was used to identify adherence trajectories using 5 indicators of self-reported adherence. Logistic regression modeling evaluated the associations between adherence trajectories and durable viral suppression.

RESULTS

Overall, 933 ALHIV (89.2%) completed all 3 study waves (55.1% female, mean age: 13.6 years at baseline). Four adherence trajectories were identified, namely, "consistent adherence" (49.8%), "low start and increasing" (20.8%), "gradually decreasing" (23.5%), and "low and decreasing" (5.9%). Adolescents experiencing inconsistent adherence trajectories were more likely to be older, live in rural areas, and have sexually acquired HIV. Compared with the consistent adherence trajectory, the odds of durable viral suppression were lower among adolescents in the low start and increasing (adjusted odds ratio [aOR]: 0.62, 95% CI: 0.41 to 0.95), gradually decreasing (aOR: 0.40, 95% CI: 0.27 to 0.59), and the low and decreasing adherence (aOR: 0.25, 95% CI: 0.10 to 0.62) trajectories.

CONCLUSIONS

Adherence to antiretroviral treatment remains a challenge among ALHIV in South Africa. Identifying adolescents at risk of nonadherence, based on their adherence trajectories may inform the tailoring of adolescent-friendly support strategies.

Key informant views on potential acceptability and feasibility of long-acting antiretroviral treatment for HIV in Kenya

BACKGROUND

In 2020, 14% of diagnosed persons living with HIV (PLWH) in Kenya were not taking antiretroviral therapy (ART), and 19% of those on ART had unsuppressed viral loads. Long-acting antiretroviral therapy (LA-ART) may increase viral suppression by promoting ART uptake and adherence. We conducted key informant (KI) interviews with HIV experts in Kenya to identify product and delivery attributes related to the acceptability and feasibility of providing LA-ART to PLWH in Kenya.

METHODS

Interviews were conducted via Zoom on potential LA-ART options including intra-muscular (IM) injections, subcutaneous (SC) injections, implants, and LA oral pills. KI were asked to discuss the products they were most and least excited about, as well as barriers and facilitators to LA-ART roll-out. In addition, they were asked about potential delivery locations for LA-ART products such as homes, pharmacies, and clinics. Interviews were recorded and transcribed, and data were analyzed using a combination of inductive and deductive coding.

RESULTS

Twelve KI (5 women, 7 men) participated between December 2021 and February 2022. Overall, participants reported that LA-ART would be acceptable and preferable to PLWH because of fatigue with daily oral pills. They viewed IM injections and LA oral pills as the most exciting options to ease pill burden and improve adherence. KI felt that populations who could benefit most were adolescents in boarding schools and stigmatized populations such as sex workers. SC injections and implants were less favored, as they would require new training initiatives for patients or healthcare workers on administration. In addition, SC injections would require refrigeration and needle disposal after use. Some KI thought patients, especially men, might worry that IM injections and implants would impact fertility, given their role in family planning. Pharmacies were perceived by most KI as suboptimal delivery locations; however, given ongoing work in Kenya to include pharmacies in antiretroviral delivery, they recommended asking patients their views.

CONCLUSION

There is interest and support for LA-ART in Kenya, especially IM injections and LA oral pills. Identifying patient preferences for modes and delivery locations and addressing misconceptions about specific products as they become available will be important before wide-scale implementation.

Lenacapavir: A first-in-class capsid inhibitor for the treatment of highly treatment-resistant HIV

PURPOSE

The purpose of this article is to review the pharmacology, efficacy, and safety of the capsid inhibitor lenacapavir for the treatment of multidrug-resistant human immunodeficiency virus type 1 (HIV-1) infection.

SUMMARY

A review of the literature was performed by searching PubMed/MEDLINE for all relevant articles published between February 2021 and March 2023 using the keywords "lenacapavir," "Sunlenca," "human immunodeficiency virus," and "treatment" together with "multidrug resistant human immunodeficiency virus." All English-language articles describing clinical trials assessing the efficacy and safety of lenacapavir when used in humans for the treatment of HIV infection were included. Review articles, conference abstracts, and article references were evaluated for relevant information, and data were also obtained from the manufacturer's website and the package insert. Lenacapavir has been approved by the Food and Drug Administration (FDA) for the treatment of HIV-1 infection in heavily treatment-experienced adults with multidrug resistance for whom the current antiretroviral regimen is failing due to resistance, intolerance, or safety considerations. It is the first in a new class of drugs called capsid inhibitors to receive FDA approval. Lenacapavir is a long-acting subcutaneous injectable to be administered once every 6 months. The phase 3 clinical trial evaluating lenacapavir has demonstrated its efficacy in viral load reduction from baseline compared to placebo in patients receiving optimized background therapy. The most common adverse events reported in the clinical trial were injection site reactions, occurring in 63% of participants.

CONCLUSION

Lenacapavir is a novel capsid inhibitor indicated, in combination with other antiretroviral therapy, for treatment of multidrug-resistant HIV-1 infection.

Considerations for long-acting antiretroviral therapy in older persons with HIV

People with HIV (PWH) can now enjoy longer, healthier lives due to safe and highly effective antiretroviral therapy (ART), and improved care and prevention strategies. New drug formulations such as long-acting injectables (LAI) may overcome some limitations and issues with oral antiretroviral therapy and strengthen medication adherence. However, challenges and questions remain regarding their use in aging populations. Here, we review unique considerations for LAI-ART for the treatment of HIV in older PWH, including benefits, risks, pharmacological considerations, implementation challenges, knowledge gaps, and identify factors that may facilitate uptake of LA-ART in this population.

High Acceptability and Perceived Feasibility of Long-Acting Injectable Antiretroviral Treatment Among People Living with HIV Who Are Viremic and Health Workers in Uganda

Long-acting injectable antiretroviral treatment (LAI ART), such as a bimonthly injection of cabotegravir/rilpivirine, is a promising HIV treatment option. LAI ART may particularly benefit people who are reluctant to initiate or are poorly adherent to daily oral pills and not virally suppressed. However, the acceptability and feasibility of LAI ART among individuals with viremia in Africa has not been well studied. We conducted qualitative in-depth interviews with 38 people living with HIV with viral load ≥1000 copies/mL and 15 medical and nursing staff, and 6 focus group discussions with peer health workers, to examine acceptability and feasibility of LAI ART in south-central Uganda. Transcripts were thematically analyzed through a team-based framework approach. Most people living with HIV reacted positively toward LAI ART and endorsed interest in taking it themselves. Most felt LAI ART would make adherence easier by reducing the challenge with remembering daily pills, particularly in the context of busy schedules, travel, alcohol use, and dietary requirements. Participants also appreciated the privacy of injections, reducing the likelihood of stigma or inadvertent HIV serostatus disclosure with pill possession. Concerns about LAI ART included side effects, perceived medication effectiveness, fear of injection, and medical mistrust and conspiracy beliefs. Health workers and participants with viremia also noted health system challenges, such as stockouts and monitoring treatment failure. However, they felt the health system could overcome these challenges. Implementation complexities must be addressed as LAI ART is introduced and expanded in Africa to best support viral suppression and address HIV care continuum gaps.

Artificial-Intelligence-Based Models Coupled with Correspondence Analysis Visualization on ART—Cases from Gombe State, Nigeria: A Comparative Study

Antiretroviral therapy (ART) is the common hope for HIV/AIDS-treated patients. Total commitments from individuals and the entire community are the major challenges faced during treatment. This study investigated the progress of ART in the Federal Teaching Hospital in Gombe state, Nigeria by using various records of patients receiving treatment in the ART hospital unit. We combined artificial intelligence (AI)-based models and correspondence analysis (CA) techniques to predict and visualize the progress of ART from the beginning to the end. The AI models employed are artificial neural networks (ANNs), adaptive neuro-fuzzy inference systems (ANFISs) and support-vector machines (SVMs) and a classical linear regression model of multiple linear regression (MLR). According to the outcome of this study, ANFIS in both training and testing outperformed the remaining models given the R2 (0.903 and 0.904) and MSE (7.961 and 3.751) values, revealing that any increase in the number of years of taking ART medication will provide HIV/AIDS-treated patients with safer and elongated lives. The contingency results for the CA and the chi-square test did an excellent job of capturing and visualizing the patients on medication, which gave similar results in return, revealing there is a significant association between ART drugs and the age group, while the association between ART drugs and marital status (93.7%) explained a higher percentage of variation compared with the remaining variables.