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1.
BMC Health Serv Res ; 24(1): 787, 2024 Jul 09.
Artículo en Inglés | MEDLINE | ID: mdl-38982478

RESUMEN

BACKGROUND: Access and use of contraception services by adolescent girls and young women (AGYW) remains suboptimal, exposing AGYW to early and often unexpected pregnancy. Unexpected pregnancies are a public health concern, associated with poor neonatal and maternal health outcomes, as well as school dropout, which may result in economic hardships. This study aimed to explore (a) AGYW perceptions and experiences of receiving contraception services from health care providers and (b) health care providers' perceptions and experiences of providing contraception services to AGYW. METHODS: Data were collected through semi-structured individual interviews with AGYW aged 15-24 years old and health care providers working in eight health care facilities around the Cape Town metropolitan area, in South Africa's Western Cape Province. Thematic analysis was used to analyse the data. RESULTS: AGYW and health care providers voiced varying, and often contrasting, perceptions of some of the barriers that hinder AGYW's access to contraception services. AGYW indicated that provider-imposed rules about when to access contraceptive services hindered access, while health care providers felt that these rules were necessary for coordinating their work. In addition, AGYW highlighted health care providers' hostile attitudes towards them as an important factor discouraging access. On the contrary, health care providers did not think that their attitudes hampered AGYW's access to and use of contraception services, instead they emphasised that challenges at the health system level were a major issue, which they feel they have little control over. Such challenges made health care providers' work unpleasant and frustrating, impacting on their work approach and how they receive and offer services to AGYW. CONCLUSION: The expectation of negative attitudes from health care providers continues to be at the centre of AGYW discouragement towards accessing contraception services. System challenges are among some of the key drivers of health care provider's hostile attitudes, posing challenges to the efficient provision of services. In order to improve AGYW's access to and use of contraception services, and subsequently achieve the country's SDGs, conscious efforts need to be directed towards improving the workload and working conditions of health care providers.


Asunto(s)
Personal de Salud , Accesibilidad a los Servicios de Salud , Humanos , Femenino , Sudáfrica , Adolescente , Adulto Joven , Personal de Salud/psicología , Personal de Salud/estadística & datos numéricos , Anticoncepción/estadística & datos numéricos , Anticoncepción/psicología , Anticoncepción/métodos , Entrevistas como Asunto , Investigación Cualitativa , Actitud del Personal de Salud , Embarazo , Servicios de Planificación Familiar/estadística & datos numéricos
2.
Mol Cell Endocrinol ; 587: 112214, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38537882

RESUMEN

Both male and female reproductive functions are impacted by altered gonadotrophin secretion and action, which may also influence the development of endocrine tumours. To ascertain if chronic hypersecretion of human chorionic gonadotropin (hCG) contributes to the development of gonadal tumours, double transgenic (TG) mice that overexpress hCGα- and ß-subunits were analysed. By the age of two months, ovarian tumours with characteristics of teratomas developed with 100% penetrance. Teratomas were also seen in wild-type ovaries orthotopically transplanted into TG mice, demonstrating an endocrine/paracrine mechanism for the hCG-induced ovarian tumorigenesis. Both in vitro and in vivo experiments showed oocyte parthenogenetic activation in TG females. In addition, ovaries showed reduced ovulatory gene expression, inhibited ERK1/2 phosphorylation, and impaired cumulus cell expansion. Hence, persistently high endocrine hCG activity causes parthenogenetic activation and development of ovarian teratomas, along with altered follicle development and impaired ERK1/2 signalling, offering a novel mechanism associated with the molecular pathogenesis of ovarian teratomas.


Asunto(s)
Neoplasias Ováricas , Teratoma , Ratones , Animales , Masculino , Femenino , Humanos , Lactante , Ratones Transgénicos , Gonadotropina Coriónica/farmacología , Oocitos , Neoplasias Ováricas/genética , Neoplasias Ováricas/patología
3.
Contraception ; 130: 110307, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37863465

RESUMEN

OBJECTIVES: We investigated the coverage of contraception services (excluding condoms) to prevent unintended pregnancy among young women and girls aged 15 to 24 years who were beneficiaries of one of the two largest combination HIV and pregnancy prevention program in South Africa. STUDY DESIGN: We invited 2160 randomly sampled beneficiaries who were living in six of the 12 program districts across six provinces to participate in a telephone survey. We created pregnancy prevention coverage cascades and conducted univariate and multivariable analyses to identify key barriers and facilitators associated with each step of the cascade. RESULTS: We achieved a response rate of 23.8%, resulting in 515 respondents, of whom 303 had sex in the 6 months before the survey. Of this subsample, 80.4% had access to contraception services, 60.6% had access and motivation to use contraceptives, and 21.9% had access to, motivation to use, and effectively used contraceptives. Distance to travel to services and not ever being offered contraceptives by health workers were access barriers, while low pregnancy risk perception was a barrier to motivation. CONCLUSIONS: Most respondents had access to and were motivated to use contraceptives other than condoms but were not effectively using them. Having been offered contraceptives facilitated better access, while distance to the services was a barrier, suggesting the importance of improving supply-side interventions, such as increasing the number and accessibility of spaces where Sexual and Reproductive Health (SRH) services are offered. We recommend longitudinal behavioral counseling for young people, especially adolescents, as well as risk reduction and information-tailored interventions. IMPLICATIONS: Pregnancy prevention cascades are a promising tool to monitor progress toward universal access to contraception services and to identify barriers that need to be addressed to achieve the effective use of contraceptives.


Asunto(s)
Anticoncepción , Infecciones por VIH , Embarazo , Adolescente , Femenino , Humanos , Sudáfrica , Anticoncepción/métodos , Anticonceptivos , Conducta Sexual , Infecciones por VIH/prevención & control
4.
AIDS Behav ; 28(4): 1137-1151, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-37462890

RESUMEN

Adolescent girls and young women (AGYW) in South Africa are at a three times higher risk of acquiring HIV than their male counterparts. The HIV prevention cascade is a tool which can be used to measure coverage of HIV prevention services, although there is limited empirical evidence to demonstrate its application in low-resourced settings. The unifying framework is a conceptualisation of the HIV prevention cascade which theorises that both motivation and access are required for an individual to effectively use an HIV prevention method. We applied this framework to data from a random sample of 127,951 beneficiaries of a combination HIV prevention programme for AGYW aged 15-24 in South Africa to measure the steps to, and identify key barriers to, effective use of male condoms and oral pre-exposure prophylaxis (PrEP) among this vulnerable population. Barriers to each step were analysed using univariate and multivariable logistic regression. Among self-reported HIV-negative AGYW who had sex in the past 6 months, effective use of condoms (15.2%), access to PrEP (39.1%) and use of PrEP (3.8%) were low. AGYW were: less likely to be motivated to use condoms if they believed that they had a faithful partner (aOR 0.44, 95% CI 0.22-0.90) or disliked condoms (aOR 0.26, 95% CI 0.11-0.57), less likely to access condoms if the place where AGYW accessed them was far away (aOR 0.25, 95% CI 0.10-0.64), more likely to effectively use condoms if they received counselling on how to use them (aOR 2.24, 95% CI 1.05-4.76), less likely to be motivated to use PrEP if they did not believe PrEP was efficacious (aOR 0.35, 95% CI 0.17-0.72), more likely to be motivated if they felt confident that they could use PrEP, and more likely to have access to PrEP if they had ever been offered PrEP (aOR 2.94, 95% CI 1.19-7.22). This combination HIV prevention programme and similar programmes should focus on risk-reduction counselling interventions for AGYW and their male partners to improve effective use of condoms and ensure easy access to condoms and PrEP by making them available in youth-friendly spaces. Our findings demonstrate that the application of HIV prevention cascades can inform AGYW HIV prevention programming in low-resourced settings.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Profilaxis Pre-Exposición , Humanos , Masculino , Adolescente , Femenino , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Infecciones por VIH/tratamiento farmacológico , Sudáfrica/epidemiología , Profilaxis Pre-Exposición/métodos , Condones , Motivación , Fármacos Anti-VIH/uso terapéutico
5.
Vaccines (Basel) ; 11(10)2023 Oct 11.
Artículo en Inglés | MEDLINE | ID: mdl-37896983

RESUMEN

(1) Background: By October 2022, vaccination rates with at least one dose of a COVID-19 vaccine were low among adolescent girls aged 12-17 (38%) and young women aged 18-34 (45%) in South Africa. This study aimed to measure and identify barriers to and facilitators of motivation to take up, access to, and uptake of COVID-19 vaccines among schoolgoing adolescent girls and young women in two districts in South Africa. (2) Methods: Using the theory of the HIV prevention cascade, we conceptualised the relationship between motivation, access, and uptake of COVID-19 vaccines, and associated barriers. Potential barriers and facilitators were identified using bivariate and multivariable Poisson regression. (3) Results: Among all 2375 participants, access was high (69%), but motivation (49%) and vaccination with at least one COVID-19 vaccine (45%) were lower. Fear of injections was a barrier to vaccine uptake (aRR 0.85 95% CI 0.82-0.88), while being tested for COVID-19 (aRR 2.10 95% CI 1.85-2.38) and believing that the COVID-19 vaccine was safe (aRR 1.31 95% CI 1.18-1.44) and would prevent you from getting very sick (aRR 1.11 95% CI 1.04-1.19) were facilitators. (4) Conclusions: The controversy about the value of vaccinating adolescents and the delay in vaccine rollout for adolescents and young adults may have contributed to fears about the safety and efficacy of COVID-19 vaccines, as well as a lack of motivation to get vaccinated.

7.
AIDS Behav ; 27(9): 2997-3011, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-36856934

RESUMEN

This study examined the prevalence of HIV risk factors and their association with intervention exposure among adolescent girls and young women (AGYW) living in six South African districts in which a combination HIV-prevention intervention was being implemented. A cross-sectional household survey was conducted from 2017 to 2018 among a representative sample of AGYW aged 15-24 years living in the six districts. We used an electronic questionnaire for self-reported demographic and behavioural questions and blood samples were taken to confirm HIV status in the laboratory. Chi-Squared tests and multivariate binary logistic regression were used to examine associations between demographic characteristics, HIV acquisition and transmission risk factors and the likelihood of participating in any of the key components of the combination HIV-prevention intervention. Among the 4399 participants, 45.3% reported inconsistent condom use with casual partner and 46.6% with a main partner. Almost half of participants (47.8%) had participated in one or more components of the HIV-prevention intervention, and in a multivariate logistic regression, those reporting a higher number of HIV risk behaviours were no more (or less) likely to participate. Participants who were not in high school were significantly less likely to have participated in the intervention compared to those still in high school, when adjusting for age and HIV risk factors. The barriers to access and uptake of combination HIV prevention interventions among AGYW who are out of the education system need to be explored and combination HIV prevention interventions and implementation strategies need to be tailored to reach this population.


Asunto(s)
Infecciones por VIH , Conducta Sexual , Humanos , Femenino , Adolescente , Parejas Sexuales , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Sudáfrica/epidemiología , Estudios Transversales
8.
BMJ Open ; 13(3): e061503, 2023 03 27.
Artículo en Inglés | MEDLINE | ID: mdl-36972966

RESUMEN

BACKGROUND: Pre-exposure prophylaxis (PrEP) is an emerging biomedical prevention intervention. Documenting PrEP service delivery models (SDMs) that promote linkage to and continuation of PrEP will inform guidelines and maximise roll-out. OBJECTIVES: To synthesise and appraise the effectiveness and feasibility of PrEP SDMs designed to promote linkage to PrEP care among adolescent girls and young women (AGYW) and men in sub-Saharan Africa (SSA). ELIGIBILITY CRITERIA: Primary quantitative and qualitative studies published in English and conducted in SSA were included. No restrictions on the date of publication were applied. SOURCES OF EVIDENCE: Methodology outlined in the Joanna Briggs Institute reviewers' manual was followed. PubMed, Cochrane library, Scopus, Web of Science and online-conference abstract archives were searched. CHARTING METHODS: Data on article, population, intervention characteristics and key outcomes was charted in REDCap. RESULTS AND CONCLUSION: Of the 1204 identified records, 37 (met the inclusion criteria. Health facility-based integrated models of PrEP delivery with family planning, maternal and child health or sexual and reproductive services to AGYW resulted in PrEP initiation of 16%-90%. Community-based drop-in centres (66%) was the preferred PrEP outlet for AGYW compared with public clinics (25%) and private clinics (9%). Most men preferred community-based delivery models. Among individuals who initiated PrEP, 50% were men, 62% were <35 years old and 97% were tested at health fairs compared with home testing. Integrated antiretroviral therapy (ART)-PrEP delivery was favoured among serodiscordant couples with 82.9% of couples using PrEP or ART with no HIV seroconversions. PrEP initiation within healthcare facilities was increased by perceived client-friendly services and non-judgemental healthcare workers. Barriers to PrEP initiation included distance to travel to and time spent at health facilities and perceived community stigma. PrEP SDMs for AGYW and men need to be tailored to the needs and preferences for each group. Programme implementers should promote community-based SDMs to increase PrEP initiation among AGYW and men.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Seropositividad para VIH , Profilaxis Pre-Exposición , Masculino , Niño , Humanos , Femenino , Adolescente , Adulto , Fármacos Anti-VIH/uso terapéutico , Infecciones por VIH/prevención & control , Infecciones por VIH/tratamiento farmacológico , Conducta Sexual , Seropositividad para VIH/tratamiento farmacológico , Profilaxis Pre-Exposición/métodos , África del Sur del Sahara
9.
PLoS One ; 18(2): e0271942, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36780479

RESUMEN

INTRODUCTION: Adolescent girls and young women (AGYW) aged 15-24 years and adolescent boys and young men (ABYM) aged 15-34 years represent one of the populations at highest risk for HIV-infection in South Africa. The National Department of Health adopted the universal test and treat (UTT) strategy in 2016, resulting in increases in same-day antiretroviral therapy initiations and linkage to care. Monitoring progress towards attainment of South Africa's 95-95-95 targets amongst AGYW and ABYM relies on high quality data to identify and address gaps in linkage to care. The aim of this study is to describe the current approaches for engaging AGYW and ABYM in the treatment continuum to generate knowledge that can guide efforts to improve linkage to, and retention in, HIV care among these populations in KwaZulu-Natal, South Africa. METHODS AND ANALYSIS: This is a mixed methods study, which will be conducted in uMgungundlovu district of KwaZulu-Natal, over a 24-month period, in 22 purposively selected HIV testing and treatment service delivery points (SDPs). For the quantitative component, a sample of 1100 AGYW aged 15-24 years and ABYM aged 15-35 years old will be recruited into the study, in addition to 231 healthcare providers (HCPs) involved in the implementation of the UTT program. The qualitative component will include 30 participating patients who were successfully linked to care, 30 who were not, and 30 who have never tested for HIV. Key informant interviews will also be conducted with 24 HCPs. Logistic regression will be used to model the primary outcomes on SDP types, while a time to event analysis will be conducted using a Cox regression model and adjusting the standard errors of the hazard ratio for the clustering of participants within SDPs. For qualitative data, a general inductive approach of analysis will be used. DISSEMINATION: Findings from the study will be communicated to the study population and results will be presented to stakeholders and at appropriate local and international conferences. Outputs will also include a policy brief, peer reviewed journal articles and research capacity building through research degrees.


Asunto(s)
Infecciones por VIH , Masculino , Humanos , Femenino , Adolescente , Adulto Joven , Adulto , Sudáfrica/epidemiología , Infecciones por VIH/diagnóstico , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/epidemiología , Modelos Logísticos , Población Rural , Prueba de VIH
10.
AIDS Behav ; 27(1): 134-149, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-35793053

RESUMEN

Daily oral pre-exposure prophylaxis (PrEP) is highly efficacious for HIV prevention. Adolescent girls and young women (AGYW) have been prioritised for PrEP delivery in South Africa. A combination HIV prevention intervention providing integrated biomedical, behavioural and structural interventions for AGYW aged 15-24 in twelve districts in South Africa characterised by high HIV prevalence, was implemented 2019-2022. We conducted qualitative interviews to explore PrEP implementation experiences with 38 individuals involved in the implementation of the combination HIV prevention programme, including programme managers and project coordinators, health care providers / nurses, social workers, counsellors, peer group trainers and outreach workers. Narratives included various challenges associated with PrEP uptake, adherence and acceptability experienced by implementers. Barriers to PrEP acceptability included AGYW fears of side effects and preference for injectable versus daily oral PrEP; resistance towards PrEP from AGYW, communities and parents due to a lack of accurate information; PrEP stigma linked to associations with antiretrovirals and assumptions of promiscuity; and issues pertaining to parental consent. Additionally, implementers faced logistical challenges related to procurement, stockouts, and supply of PrEP. Findings highlighted the critical role of parental and community acceptability of PrEP for successful implementation. Overall, PrEP was perceived by implementers as a valuable HIV prevention tool. In order to ensure the accessibility of PrEP for AGYW in South Africa, efforts to reduce stigma and foster social support for PrEP use, campaigns to raise awareness, ensure positive framing of PrEP, and build community acceptability of PrEP, are needed.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Profilaxis Pre-Exposición , Humanos , Femenino , Adolescente , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Infecciones por VIH/tratamiento farmacológico , Sudáfrica/epidemiología , Fármacos Anti-VIH/uso terapéutico , Responsabilidad Social
11.
AIDS Behav ; 27(1): 231-244, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-35841462

RESUMEN

Adolescent girls and young women (AGYW) living with HIV have poor antiretroviral therapy (ART) outcomes. We examined the relationship between psychosocial factors with knowledge of HIV-positive status and antiretroviral therapy exposure among AGYW living with HIV in South Africa. Participants 15-24 years responded to a survey including socio-demographics, psychosocial factors, and HIV testing. Blood was collected to determine HIV status and ART exposure. Multivariable analyses were conducted using R. Of 568 participants with HIV, 356 had knowledge of their HIV-positive status. Social support from family [aOR 1.14 (95% CI 1.04-1.24)] or from a special person [aOR 1.12 (95% CI 1.02-1.23)] was associated with knowledge of HIV-positive status. Resilience [aOR 1.05 (95% CI 1.01-1.08)] was the only psychosocial factor associated with a higher odds of ART exposure. Social support and resilience may increase knowledge of HIV-positive status and ART exposure among South African AGYW.


Asunto(s)
Infecciones por VIH , Humanos , Femenino , Adolescente , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/psicología , Sudáfrica/epidemiología , Antirretrovirales/uso terapéutico , Encuestas y Cuestionarios , Apoyo Social
12.
AIDS Behav ; 27(6): 2015-2029, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36441410

RESUMEN

We examined power and decision-making in heterosexual relationships amongst South African adolescents and young people. A survey conducted with 515 adolescent girls and young women (AGYW) included items from the Sexual Relationship Power Scale (SRPS) adapted for South African women. Qualitative interviews with fifty AGYW aged between 15 and 24, and nine males aged 18 years and above, explored decision-making in heterosexual relationships, particularly relating to timing of sex and condom use. Theories of gendered power, sexual relationship power and sexual scripting were used in interpreting the data. Findings showed that the power AGYW have in sexual relationships determines their ability to use condoms, and that males generally control condom use and timing of sex. Both survey and interview data suggest that male control over female partners' behaviour also extends beyond the sexual domain. Although while male power is pervasive and enduring, it is simultaneously contested and negotiated. Despite some young people believing that gendered power in decision-making should be equal, it is not always possible for AGYW to enact agency in the dyadic context of heterosexual relationships. Whilst adolescents and young people in South Africa move away from traditional cultural gendered expectations, relationship power inequity and hegemonic masculinities continue to legitimise men's power over women, constraining the sexual agency of adolescent girls and young women and discouraging them from taking control of their own sexual interests and sexual health.


Asunto(s)
Condones , Infecciones por VIH , Masculino , Femenino , Humanos , Adolescente , Sudáfrica/epidemiología , Heterosexualidad , Infecciones por VIH/prevención & control , Conducta Sexual , Parejas Sexuales
13.
Front Reprod Health ; 4: 960089, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36406890

RESUMEN

Background: Rumours, myths, and misperceptions about contraceptives are a barrier to contraceptive use in general, but more so among adolescent girls and young women (AGYW). As rumours and misinformation disseminate easily, it is important to explore how they affect the uptake of contraceptives among AGYW at risk of unintended pregnancies. This study used qualitative methods to explore whether rumours, myths, and misperceptions about contraceptives remain barriers to modern contraceptive use among AGYW who were beneficiaries of a combination HIV prevention intervention in South Africa. Methods: Four (4) once-off in-depth interviews, 53 serial in-depth interviews, and 19 focus group discussions (FGDs) with 185 AGYW aged 15-24 years living in 5 of the 10 intervention districts were conducted as part of the HERStory 1 Study. Interviews and FGDs were audio recorded and data were analysed thematically, aided by Nvivo 12 software. Results: Rumours, myths, and misperceptions about contraceptives, as well as sociocultural norms regarding contraception seriously hinder AGYWs' use of modern contraceptives. Peer/friends' disapproval and parents' and boyfriend's lack of support for AGYWs' use of contraceptives, based on rumours and perceived side effects, also impede AGYWs' access and use of contraceptives. Conclusion: Sexual and reproductive health programmes could address social norms that disapprove of contraception and target rumours, myths, and misperceptions regarding modern contraceptive methods through educational campaigns and community engagements. Promoting the use of contraception in the community and men's acceptance of contraceptive use, in particular, may increase their understanding of modern contraceptives and, subsequently, their approval for their partners to use them.

14.
Endocrinology ; 163(12)2022 10 23.
Artículo en Inglés | MEDLINE | ID: mdl-36201606

RESUMEN

Follicle-stimulating hormone (FSH) is a key endocrine regulator of ovarian function. FSH is secreted as 2 macroglycosylation variants: partially glycosylated FSH (FSH21/18) and fully glycosylated FSH (FSH24). FSH21/18 is more potent than FSH24 at binding to and activating the FSH receptor (R). The ratio of FSH21/18:FSH24 has been shown to change with age, with FSH21/18 predominant at reproductive prime, and FSH24 predominant during perimenopause/menopause. How these FSH glycosylation variants modulate ovarian follicle functions remains largely unknown. The aim of this study was to investigate the effect of FSH glycosylation variants of pre-antral follicle function. Pre-antral follicles were isolated from 3- to 5-week-old C57BL/6 mice and treated ±10 ng/mL FSH21/18, FSH24, a ratio of 80:20 FSH21/18:FSH24 (to mimic reproductive prime), 50:50 FSH21/18:FSH24 (perimenopause), or 20:80 FSH21/18:FSH24 (menopause) for up to 96 hours. FSH21/18 and 80:20 FSH21/18:FSH24 increased follicle growth, in comparison with control, contrasting with FSH24 and 20:80 FSH21/18:FSH24. Survival rates were decreased in follicles treated with FSH24 or 20:80 FSH21/18:FSH24, with follicles undergoing basement membrane rupture and oocyte extrusion, increased Caspase3 gene and protein expression, and decreased markers of cell proliferation in FSH24 or 20:80 FSH21/18:FSH24-treated follicles. Moreover, this correlated with differential regulation of key genes modulating follicular functions. Pharmacological inhibitors of key FSH signal pathways suggests FSH21/18 and FSH24 initiate different FSHR signal pathway activation, which may determine their differential effects on follicle growth and survival. These data suggest that the nature of FSH glycosylation modulates the follicular cellular environment to regulate follicle growth and survival and may underpin the increasing ovarian resistance to FSH observed during aging.


Asunto(s)
Hormona Folículo Estimulante , Receptores de HFE , Femenino , Ratones , Animales , Hormona Folículo Estimulante/metabolismo , Receptores de HFE/genética , Receptores de HFE/metabolismo , Glicosilación , Ratones Endogámicos C57BL , Folículo Ovárico/metabolismo
15.
BMJ Open ; 12(9): e060778, 2022 09 19.
Artículo en Inglés | MEDLINE | ID: mdl-36123080

RESUMEN

INTRODUCTION: Recent advances in the HIV care continuum have shown that an individual diagnosed with HIV should be initiated on antiretroviral therapy as soon as possible regardless of the CD4 count levels and retained in HIV care services. Studies have reported large losses in the HIV continuum of care, before and after the era of universal test and treat. Several systematic reviews have reported on the strategies for improving linkage to and retention in HIV treatment and care. The purpose of this overview of systematic reviews is to identify HIV care interventions or service delivery models (SDMs) and synthesise evidence on the effects of these to link adolescent girls and young women (AGYW) and adolescent boys and young men (ABYM) to care and retain them in care. We also aim to highlight gaps in the evidence on interventions and SDMs to improve linkage and retention in HIV care of AGYW and ABYM. METHODS AND ANALYSIS: An electronic search of four online databases: PubMed, Cochrane Database of Systematic Reviews, Cumulative Index to Nursing and Allied Health Literature (CINAHL) and Web of Science will be performed to identify systematic reviews on the effects of linkage to and retention in HIV care interventions or SDMs for AGYW aged 15-24 years and ABYM aged 15-35 years. Our findings on the effects of interventions and SDMs will be interpreted considering the intervention and or SDMs' effectiveness by the time period, setting and population of interest. Two or more authors will independently screen articles for inclusion using a priori criteria. ETHICS AND DISSEMINATION: Ethics approval is not required for this study as only published secondary data will be used. Our findings will be disseminated through peer-reviewed publication, conference abstracts and through presentations to stakeholders and other community fora. The findings from this overview of systematic reviews will inform mixed-methods operations research on HIV intervention programming and delivery of HIV care services for AGYW and ABYM in South Africa. PROSPERO REGISTRATION NUMBER: CRD42020177933.


Asunto(s)
Fenómenos Biológicos , Infecciones por VIH , Adolescente , Femenino , Infecciones por VIH/tratamiento farmacológico , Humanos , Masculino , Literatura de Revisión como Asunto , Sudáfrica , Revisiones Sistemáticas como Asunto
16.
Contraception ; 116: 51-58, 2022 12.
Artículo en Inglés | MEDLINE | ID: mdl-35882358

RESUMEN

OBJECTIVE: This study investigated whether young women's participation in a combination HIV-prevention intervention was associated with accessing and using condoms and other contraceptives. STUDY DESIGN: A cross-sectional household survey was conducted from 2017 to 2018 among a representative sample of young women aged 15-24 years old living in six South African districts in which the intervention was implemented. Cross-tabulations and multivariate regression analyses of weighted data were performed to examine access to and use of condoms and other contraceptives. RESULTS: In total 4399 young women participated, representing a 60.6% response rate. Of participants, 61.0% (n = 2685) reported accessing condoms and other contraceptives in the past year. Among those who ever had sex (n = 3009), 51.0% used condoms and 37.4% other contraceptives at last sex. Among 15-19 year old, participation in the combination intervention was positively associated with reporting contraceptive use other than condoms at last sex (Prevalence Ratio (PR): 1.36; 95% CI: 1.21-1.53) and reporting use of both condoms and other contraceptives at last sex (PR: 1.45; 95% CI: 1.26-1.68). No associations were observed in the age group 20-24. CONCLUSION: Our findings suggest that combination HIV prevention interventions may lead to increased access and use of condoms and other methods of contraception among adolescent women, but this needs to be confirmed in experimental studies. We need to test different or more intensive interventions to increase contraceptive use in young women aged 20-24. IMPLICATIONS: Participating in combination HIV prevention interventions that are delivered via multiple approaches may promote access to, and use of condoms and other methods of contraceptives among adolescent women, and thereby help reduce unintended pregnancies.


Asunto(s)
Anticonceptivos , Infecciones por VIH , Humanos , Adolescente , Embarazo , Femenino , Adulto Joven , Adulto , Estudios Transversales , Sudáfrica , Condones , Anticoncepción/métodos , Infecciones por VIH/prevención & control , Conducta Anticonceptiva
17.
Child Adolesc Psychiatry Ment Health ; 16(1): 57, 2022 Jul 14.
Artículo en Inglés | MEDLINE | ID: mdl-35836277

RESUMEN

BACKGROUND: Current work in the field point to the need to strengthen child and adolescent mental health services (CAMHS) globally, and especially in low- and middle-income countries (LMICs). Policy development, planning and service provision must be relevant to the needs of stakeholders at grassroots level, and should include their perspectives. This study set out to explore the perspectives and lived experiences of service providers, including their recommendations to strengthen CAMHS in South Africa. METHODS: Using focus group discussions (FGDs) and semi-structured individual interviews (SSIIs), qualitative data were collected from 46 purposefully selected multidisciplinary health service providers across the Western Cape, one of the nine provinces of South Africa. Audio-recorded data were entered into NVivo 11 (QSR), and thematic analysis was performed by two independent raters. RESULTS: Results highlighted a significant lack of CAMH resources, poor intersectoral collaboration, limited access to training, absence of consistency and uniformity in service delivery, weak support for staff, and high rates of negative attitudes of staff. External factors contributing to poor CAMHS identified by service providers included poor socioeconomic circumstances, high rates of HIV/AIDS, substance use and stigma. The eight recommendations to strengthen CAMHS included a need to (1) increase CAMH staffing, (2) provide dedicated CAMHS at secondary care and child-friendly infrastructure at primary care, (3) review current service focus on number of patients seen versus quality of care provided to children, (4) formalise intersectoral collaborations, (5) increase learning opportunities for trainees, (6) employ a lead professional for CAMHS in the province, (7) increase support for staff, and (8) acknowledge staff initiatives. CONCLUSIONS: Findings underlined the need for quality improvement, standardisation and scale-up of mental health services for children and adolescents in South Africa. Whilst we used the Western Cape as a 'case study', we propose that our findings may also be relevant to other LMICs. We recommend that the perspectives of service users, including children and adolescents, be sought to inform service transformation.

18.
Methods Cell Biol ; 169: 27-41, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35623706

RESUMEN

G protein-coupled receptor (GPCR) di/oligomerization has revealed potential mechanisms for receptors diversification of signal selectivity, specificity, and amplitude. The use of super-resolution imaging techniques to investigate these di/oligomer molecular complexities have undoubtably provided insight to the dynamics of complexes formed at the plasma membrane. Here we describe the methodology of photoactivatable dye localization microscopy (PD-PALM) to study the spatial organization of GPCR homomers at the plasma membrane.


Asunto(s)
Microscopía , Receptores Acoplados a Proteínas G , Membrana Celular/metabolismo , Microscopía/métodos , Receptores Acoplados a Proteínas G/metabolismo
19.
BMC Public Health ; 22(1): 1026, 2022 05 21.
Artículo en Inglés | MEDLINE | ID: mdl-35597929

RESUMEN

BACKGROUND: Safe Spaces are a feature of combination HIV prevention interventions for adolescent girls and young women (AGYW) in South Africa. We investigated whether AGYW at risk for adverse sexual and reproductive health (SRH) outcomes accessed Safe Spaces that were part of an intervention, as well as their feasibility and acceptability. METHODS: In December 2020 to February 2021, as part of a process evaluation of a combination HIV prevention intervention, we randomly sampled 2160 AGYW intervention beneficiaries aged 15-24 years from 6 of the 12 intervention districts. We invited them to participate in a phone survey, with questions about their vulnerability to adverse SRH outcomes, and participation in intervention components including Safe Spaces. We examined factors associated with use of Safe Spaces using bivariate analyses and Pearson's chi squared tests. We also conducted in-depth interviews with 50 AGYW beneficiaries, 27 intervention implementers, 4 health workers, 7 social workers, and 12 community stakeholders, to explore perceptions and experiences of the intervention. Thematic analysis of the qualitative data was performed. RESULTS: At least 30 Safe Spaces were established across 6 districts. Five hundred fifteen of two thousand one hundred sixty sampled AGYW participated in the survey of whom 22.6% visited a Safe Space, accessing HIV testing (52.2%), mobile health services (21.2%) and counselling for distress (24.8%) while there. Beneficiaries of lower socioeconomic status (SES) were less likely to have visited a Safe Space, compared with those of higher SES (13.6% versus 25.3%; p < 0.01). Implementers described political, structural and financial challenges in identifying and setting up Safe Spaces that were safe, accessible and adequately-resourced, and challenges with AGYW not utilising them as expected. AGYW shared positive views of Safe Spaces, describing benefits such as access to computers and the internet, support with homework and job and education applications, and a space in which to connect with peers. CONCLUSION: AGYW are attracted to Safe Spaces by educational and employment promoting interventions and recreational activities, and many will take up the offer of SRH services while there. The poorest AGYW are more likely to be excluded, therefore, an understanding of the obstacles to, and enablers of their inclusion should inform Safe Space intervention design.


Asunto(s)
Infecciones por VIH , Adolescente , Consejo , Estudios de Factibilidad , Femenino , Infecciones por VIH/prevención & control , Humanos , Conducta Sexual , Sudáfrica
20.
SAHARA J ; 19(1): 8-21, 2022 12.
Artículo en Inglés | MEDLINE | ID: mdl-35443869

RESUMEN

Parent-adolescent sexuality communication, the process in which parents and their adolescent children discuss sexuality and sexual and reproductive health, is a key component for adolescents' protective behaviours. Open communication with parents, particularly mothers, enables informed sexual and reproductive health (SRH) decision-making amongst adolescent girls and young women (AGYW). As part of a qualitative study evaluating a South African combination HIV prevention intervention for AGYW, we explored perspectives on SRH communication among AGYW and mothers of AGYW, and the effects of the intervention on sexuality communication as perceived by AGYW, mothers of AGYW, intervention facilitators and implementers, and community leaders. In-depth interviews and focus group discussions were conducted with 185 AGYW aged 15-24 years who had participated in the intervention, seven mothers of AGYW intervention recipients, 14 intervention facilitators, six community leaders, and 12 intervention implementers. Key themes that emerged in analysis were (1) Barriers to Sexuality communication, (2) Implications of Gaps in Sexuality Communication, and (3) Addressing Barriers to Sexuality communication. Barriers to sexuality communication included inability or unwillingness to discuss sex, a generation gap, proscriptive socio-cultural guidelines, and mothers' discomfort, lack of knowledge and self-efficacy, and fear of encouraging promiscuity. AGYW described making poorly-informed SRH decisions alone, expressing a desire for more open communication with and support from parents/mothers. Framed within the social cognitive theory, these findings can help to guide efforts to address barriers around parent-adolescent sexuality communication, inform interventions aimed at targeting SRH issues amongst AGYW, such as unintended pregnancy and HIV, and support meaningful engagement of parents in supporting AGYW in navigating pathways to achieving their SRH goals.


Asunto(s)
Infecciones por VIH , Madres , Adolescente , Niño , Comunicación , Femenino , Infecciones por VIH/prevención & control , Humanos , Embarazo , Conducta Sexual , Sexualidad , Sudáfrica/epidemiología
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