Short-chain fatty acids affect cystic fibrosis airway inflammation and bacterial growth

The hypoxic environment of cystic fibrosis airways allows the persistence of facultative anaerobic bacteria, which can produce short-chain fatty acids (SCFAs) through fermentation. However, the relevance of SCFAs in cystic fibrosis lung disease is unknown. We show that SCFAs are present in sputum samples from cystic fibrosis patients in millimolar concentrations (mean±sem1.99±0.36 mM).

SCFAs positively correlated with sputum neutrophil count and higher SCFAs were predictive for impaired nitric oxide production. We studied the effects of the SCFAs acetate, propionate and butyrate on airway inflammatory responses using epithelial cell lines and primary cell cultures. SCFAs in concentrations present in cystic fibrosis airways (0.5–2.5 mM) affected the release of granulocyte-macrophage colony-stimulating factor, granulocyte colony-stimulating factor and interleukin (IL)-6. SCFAs also resulted in higher IL-8 release from stimulated cystic fibrosis transmembrane conductance regulator (CFTR) F508del-mutant compared to wild-type CFTR-corrected bronchial epithelial cells. At 25 mM propionate reduced IL-8 release in control but not primary cystic fibrosis epithelial cells. Low (0.5–2.5 mM) SCFA concentrations increased, while high (25–50 mM) concentrations decreased inducible nitric oxide synthase expression. In addition, SCFAs affected the growth ofPseudomonas aeruginosain a concentration- and pH-dependent manner.

Thus, our data suggest that SCFAs contribute to cystic fibrosis-specific alterations of responses to airway infection and inflammation.

Ultraviolet irradiation increases green fluorescence of dihydrorhodamine (DHR) 123: false-positive results for reactive oxygen species generation

Dihydrorhodamine (DHR) 123 is a fluorophore commonly used for measuring reactive oxygen species (ROS), often after exposing cells to ultraviolet (UV) irradiation or oxidative burst inducers such as Phorbol 12‐myristate 13‐acetate (PMA). However, the negative effects of UV irradiation on oxidation of DHR123 itself to green fluorescence rhodamine (R) 123 under different experimental conditions (e.g., different buffers, media, cells, ROS detection techniques) have not been fully appreciated. We determined the effect of UV on DHR123 fluorescence, using a cell‐free system, and A549 epithelial cells, NIH/3T3 fibroblast cells, Jurkat T cells, primary human T cells, HL‐60 neutrophils and primary human neutrophils. We found that UV irradiation rapidly increases green fluorescence of DHR123 in cell‐free solutions. The intensity of green fluorescence increases with increasing amounts of DHR123 and UV exposure. The fluorescence increase was greater in Roswell Park Memorial Institute medium (RPMI) than DMEM media. The presence of DMSO (0–1.25%, v/v) in RPMI further increases the fluorescence signal. Phosphate buffered solution (PBS) and Hanks' Balanced Salt Solution (HBSS) generate considerable background signal with DHR123, and increasing DMSO concentration greatly increases the fluorescence signal in these buffers. However, after UV irradiation the amount of DHR123 that remains unoxidized generates sufficient fluorescence signal to measure the ROS produced by H₂O₂ and peroxidase in vitro or Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase‐mediated ROS production within HL‐60 neutrophils or primary human neutrophils. We conclude that UV irradiation oxidizes DHR123 to generate Rhodamine 123 (R123) green fluorescence signal, and that the R123 present in the culture supernatant could give erroneous results in plate reader assays. However, flow cytometry and fluorescence microscopy reliably detect ROS in cells such as neutrophils. Overall, avoiding false‐positive results when detecting ROS using DHR123 requires selection of, agonists, the correct buffers, media, cell types, and measurement techniques.

Surfactant Protein D Deficiency Aggravates Cigarette Smoke-Induced Lung Inflammation by Upregulation of Ceramide Synthesis

Cigarette smoke (CS) is the main cause of chronic obstructive pulmonary disease. Surfactant protein D (SP-D) is an important anti-inflammatory protein that regulates host immune defense in the lungs. Here, we investigated the role of SP-D in a murine model of CS-induced inflammation. Pulmonary SP-D localization and abundance was compared between smoker and non-smoker individuals. For in vivo studies, wildtype, and SP-D-deficient mice were exposed to CS for either 12 weeks or 3 days. Moreover, the effect of therapeutic administration of recombinant fragment of human SP-D on the acute CS-induced changes was evaluated. Pulmonary SP-D appeared with heterogenous expression in human smokers, while mouse lung SP-D was uniformly upregulated after CS exposure. We found that SP-D-deficient mice were more susceptible to CS-induced macrophage-rich airway inflammation. SP-D deficiency influenced local pro-inflammatory cytokine levels, with increased CCL3 and interleukin-6 but decreased CXCL1. Furthermore, CS exposure caused significant upregulation of pro-inflammatory ceramides and related ceramide synthase gene transcripts in SP-D-deficient mice compared to wildtype littermates. Administration of recombinant fragment of human SP-D (rfhSP-D) alleviated CS-induced macrophage infiltration and prevented induction of ceramide synthase gene expression. Finally, rfhSP-D treatment attenuated CS-induced human epithelial cell apoptosis in vitro. Our results indicate that SP-D deficiency aggravates CS-induced lung inflammation partly through regulation of ceramide synthesis and that local SP-D enrichment rescues CS-induced inflammation.

Barriers in accessing HIV care for Francophone African, Caribbean and Black people living with HIV in Canada: a scoping review

INTRODUCTION

In 2001, 50%-55% of French-speaking minority communities did not have access to health services in French in Canada. Although Canada is officially a bilingual country, reports indicate that many healthcare services offered in French in Anglophone provinces are insufficient or substandard, leading to healthcare discrepancies among Canada's minority Francophone communities.

OBJECTIVES

The primary aim of this scoping systematic review was to identify existing gaps in HIV-care delivery to Francophone minorities living with HIV in Canada.

STUDY DESIGN

Scoping systematic review.

DATA SOURCES

Search for studies published between 1990 and November 2019 reporting on health and healthcare in Francophone populations in Canada. Nine databases were searched, including Medline, Cumulative Index to Nursing and Allied Health Literature, the Cochrane Library, the National Health Service Economic Development Database, Global Health, PsychInfo, PubMed, Scopus and Web of Science.

STUDY SELECTION

English or French language studies that include data on French-speaking people with HIV in an Anglophone majority Canadian province.

RESULTS

The literature search resulted in 294 studies. A total of 230 studies were excluded after duplicates were removed. The full texts of 43 potentially relevant papers were retrieved for evaluation and data extraction. Forty-one studies were further excluded based on failure to meet the inclusion criteria leaving two qualitative studies that met our inclusion criteria. These two studies reported on barriers on access to specialised care by Francophone and highlighted difficulties experienced by healthcare professionals in providing quality healthcare to Francophone patients in Ontario and Manitoba.

CONCLUSION

The findings of this scoping systematic review highlight the need for more HIV research on linguistic minority communities and should inform health policymaking and HIV/AIDS community organisations in providing HIV care to Francophone immigrants and Canadians.

Surfactant protein D regulates caspase-8-mediated cascade of the intrinsic pathway of apoptosis while promoting bleb formation

Surfactant-associated protein D (SP-D) is a soluble innate immune collectin present on many mucosal surfaces. We recently showed that SP-D suppresses the extrinsic pathway of apoptosis by downregulating caspase-8 activation. However, the effects of SP-D on the intrinsic pathway of apoptosis are not clearly understood. In the intrinsic pathway, cytochrome c is released by mitochondria into the cytoplasm. Oxidation of cytochrome c by cytochrome c oxidase activates the apoptosome and caspase-9 cascade. Both caspase-8- and caspase-9-mediated branches are activated in the intrinsic pathway of apoptosis; however, little is known about the relevance of the caspase-8 pathway in this context. Here we studied the effects of SP-D on different branches of the intrinsic pathway of apoptosis using UV-irradiated Jurkat T-cells. We found that SP-D does not inhibit the caspase-9 branch of apoptosis and the relevance of the caspase-8-related branch became apparent when the caspase-9 pathway was inhibited by blocking cytochrome c oxidase. Under these conditions, SP-D reduces the activation of caspase-8, executioner caspase-3 and exposure of phosphatidylserine (PS) on the membranes of dying cells. By contrast, SP-D increases the formation of nuclear and membrane blebs. Inhibition of caspase-8 confirms the effect of SP-D is unique to the caspase-8 pathway. Overall, SP-D suppresses certain aspects of the intrinsic pathway of apoptosis via reduction of caspase-8 activation and PS flipping while at the same time increasing membrane and nuclear bleb formation. This novel regulatory aspect of SP-D could help to regulate intrinsic pathway of apoptosis to promote effective blebbing and breakdown of dying cells.

Checklist for studies of HIV drug resistance prevalence or incidence: rationale and recommended use

HIV drug resistance (HIVDR) is a major challenge to the effectiveness of antiretroviral therapy. Global efforts in addressing HIVDR require clear, transparent, and replicable reporting in HIVDR studies. We describe the rationale and recommended use of a checklist that should be included in reports of HIVDR incidence and prevalence. After preliminary consultations with experts on HIVDR and establishing the need for guidance on HIVDR reporting, we used a sequential, explanatory, mixed methods approach to create the checklist; together with the accompanying articles, the checklist was reviewed by the authors and validated externally. The checklist for studies on HIVDR prevalence or incidence (CEDRIC-HIV) includes 15 recommended items that would enhance transparency and facilitate interpretation, comparability, and replicability of HIVDR studies. CEDRIC-HIV will help authors of HIVDR studies prepare research reports and assist reviewers and editors in assessments of completeness of reporting. The checklist will also facilitate statistical pooling and interpretation of HIVDR data.

A Web-Based Intervention to Reduce Decision Conflict Regarding HIV Pre-Exposure Prophylaxis: Protocol for a Clinical Trial

Background

HIV pre-exposure prophylaxis (PrEP) is recommended for populations at high ongoing risk for infection. There are noted racial disparities in the incidence of HIV and other sexually transmitted infections (STIs) for African, Caribbean, and Canadian Black (ACB, black) populations in Ontario, Canada. Although blacks represent only 4.7% of the Ontario population, they account for 30% of HIV prevalence and 25% of new infections in the province. The existing clinical public health practice toolkit has not been sufficient to optimize PrEP uptake, despite the overwhelming evidence of PrEP’s efficacy for reducing HIV transmission risk. Since its establishment as an effective HIV prevention tool, the major focus in behavioral research on PrEP has been on understanding and improving adherence. To date, there is no known formalized intervention in place designed to support ACB men and women at high risk of making high-quality decisions regarding the adoption of PrEP as an HIV prevention practice.

Objective

We propose 2 aims to address these gaps in HIV prevention and implementation science. First, the Ottawa Decision Support Framework (ODSF) for use in the PrEP decisional needs of black patients was adapted. Second, the decision support intervention to estimate effect size compared with control conditions in reducing decision conflict and predicting adherence over 60 days was pilot tested.

Methods

In aim 1, we propose a cross-sectional qualitative descriptive study using data collected from key informant interviews with eligible PrEP patients (n=30) and surveys with health professionals (n=20) involved in HIV PrEP management. Data obtained from aim 1 will be used to develop a decision support intervention based on the ODSF. In aim 2, the adopted decision support intervention using a block-randomized design to estimate effect size compared with control conditions in reducing decision conflict and predicting adherence over 60 days was pilot tested. Hypothesis testing will be de-emphasized in favor of generating effect size estimates.

Results

A research award was funded on March 25, 2017 (Multimedia Appendix 1). Ethical approval was received on March 25, 2019 (with supplemental approval received on May 10, 2019). Data collection started on April 9, 2019. As of September 30, 2019, we enrolled 29 patients and 24 health care providers for aim 1. We are currently analysing the data collected for aim 1. Aim 2 is scheduled to start in May 2020.

Conclusions

This study will provide evidence-based information on the decisional needs of black patients who are at risk of HIV and have been offered PrEP. The study will also test the effect of decision support intervention in reducing decision conflict, adoption of PrEP, and adherence to PrEP.

International Registered Report Identifier (IRRID)

PRR1-10.2196/15080

Investigating the impact of stigma, accessibility and confidentiality on STI/STD/HIV self-testing among college students in the USA: protocol for a scoping review

INTRODUCTION

In 2019, there were 2.5 million reported cases of chlamydia, gonorrhoea and syphilis. The Centers for Disease Control and Prevention reported in the USA, young people aged 15-24 made up 61% and 42% of chlamydia and gonorrhoea cases, respectively. Moreover, the highest rates of sexually transmitted infections (STIs) were reported among college-aged students. In this paper, we outline our protocol to systematically review the published literature on, the use of STI/HIV self-test kits, increasing STI/HIV testing uptake, and stigma, access and confidentiality issues, among young adult college students in the USA.

METHODS AND ANALYSIS

This scoping review will be conducted and reported according to the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews. We will search electronic databases, OVID Medline, OVID Embase, Web of Science, Cochrane Library, PubMed and CINAHL, for articles published in English from inception to the present. We will search other alternative sources such as ProQuest, Google Scholar and Google to identify grey literature. A two-step process will be used to identify eligible studies based on the defined inclusion criteria. First, the title and abstract of identified articles will be screened for possible inclusion. Second, full-text articles of relevant studies will be retrieved and screened for inclusion. Both screening steps will be done by two people independently. Finally, data will be extracted by two researchers working independently. Any arising disagreements will be resolved by consensus or by a third author.

ETHICS AND DISSEMINATION

This study is a scoping review of the literature. Therefore, ethics approval is not required. Our plan for the dissemination of findings includes peer-reviewed manuscripts, conferences and webinars.

Barriers to HIV care among Francophone African, Caribbean and Black immigrant people living with HIV in Canada: a protocol for a scoping systematic review

INTRODUCTION

Language is a social determinant of health. Addressing social determinants of health is paramount to successful progression along the HIV-care continuum. Canada is a bilingual country with French and English as official languages. There are few studies to date that have focused on the impact of being a French-speaking linguistic minority on the HIV-care continuum. The primary objective of this scoping, systematic review of literature is to evaluate existing gaps in access to HIV- care among French-speaking people living with HIV in Canada. Our primary outcome is healthcare services availability and access for French- speaking people living with HIV.

METHODS AND ANALYSES

Our scoping, systematic review will draw on a systematic search of published literature, both quantitative and qualitative studies published on French-speaking individuals' healthcare and HIV status in Canada, with particular emphasis on the province of Ontario. We will conduct our search in MEDLINE, the Excerpta Medica Database, the Cumulative Index to Nursing and Allied Health Literature, Web of Science, EBSCO and Google Scholar for work published between 1990 and 2018. Identified articles will be screened in duplicate and full-text articles of relevant studies will be retrieved. Data will also be extracted by two researchers working independently. Any discrepancies that arise will be resolved by consensus or by consulting a third author. Our findings will be reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses.

ETHICS AND DISSEMINATION

Our proposed research will not be conducted with human participants. We will only use secondary published data and therefore ethics approval is not required. Our findings will be disseminated as peer reviewed manuscripts at conferences and student rounds, and could be of interest to government health agencies and local HIV/AIDS service organisations.

Social, Clinical, and Behavioral Determinants of HIV Infection and HIV Testing among Black Men in Toronto, Ontario: A Classification and Regression Tree Analysis

Black men bear a disproportionate burden of HIV infection. These HIV inequities are influenced by intersecting social, clinical, and behavioral factors. The purpose of this analysis was to determine the combinations of factors that were most predictive of HIV infection and HIV testing among black men in Toronto. Classification and regression tree analysis was applied to secondary data collected from black men (N = 460) in Toronto, 82% of whom only had sex with women and 18% whom had sex with men at least once. For HIV infection, 10 subgroups were identified and characterized by number of lifetime male partners, age, syphilis history, and perceived stigma. Number of lifetime male partners was the best single predictor of HIV infection. For HIV testing, the analysis identified 8 subgroups characterized by age, condom use, number of sex partners and Chlamydia history. Age (>24 years old) was the best single predictor of HIV testing.

Decision conflict and the decision support needs of HIV PrEP-eligible Black patients in Toronto regarding the adoption of PrEP for HIV prevention

Objectives: This study examined factors contributing to decision conflict and the decision support needs of PrEP-eligible Black patients. Methods:The Ottawa Decision Support Framework (ODSF) was used to guide the development of a key informant guide used for qualitative data collection. Black patients assessed by healthcare providers as meeting the basic criteria for starting PrEP were recruited through the St. Michael's Hospital Academic Family Health Team and clinical and community agencies in Toronto. Participants were interviewed by trained research staff. Qualitative content analysis was guided by the ODSF, and analysis was done using the Nvivo. Results: Four women and twenty-five men (both heterosexual and men who have sex with men) were interviewed. Participants reported having difficulty in decision making regarding adoption of PrEP. The main reasons for decision-conflict regading PrEP adoption were: lack of adequate information about PrEP, concerns about the side effects of PrEP, inability to ascertain the benefits or risk of taking PrEP, provider's lack of adequate time for interaction during clinical consultation, and perceived pressure from healthcare provider. Participants identified detailed information about PrEP, and being able to clarify how their personal values align with the benefits and drawbacks of PrEP as their decision support needs. Conclusion:Many PrEP-eligible Black patients who are prescribed PrEP have decision conflict which often causes delay in decision making and sometimes rejection of PrEP. Healthcare providers should offer decision support to Black patients who are being asked to consider PrEP for HIV prevention.

Developing Reporting Guidelines for Studies of HIV Drug Resistance Prevalence: A Protocol for a Mixed-methods Study (Preprint)

Background

HIV drug resistance is a global health problem that limits the effectiveness of antiretroviral therapy. Adequate surveillance of HIV drug resistance is challenged by heterogenous and inadequate data reporting, which compromises the accuracy, interpretation, and usability of prevalence estimates. Previous research has found that the quality of reporting in studies of HIV drug resistance prevalence is low, and thus better guidance is needed to ensure complete and uniform reporting.

Objective

This paper contributes to the process of developing reporting guidelines for prevalence studies of HIV drug resistance by reporting the methodology used in creating a reporting item checklist and generating key insights on items that are important to report.

Methods

We will conduct a sequential explanatory mixed methods study among authors and users of studies of HIV drug resistance. The two-phase design will include a cross-sectional electronic survey (quantitative phase) followed by a focus group discussion (qualitative phase). Survey participants will rate the essentiality of various reporting items. This data will be analyzed using content validity ratios to determine the items that will be retained for focus group discussions. Participants in these discussions will revise the items and any additionally suggested items and settle on a complete reporting item checklist. We will also conduct a thematic analysis of the group discussions to identify emergent themes regarding the agreement process.

Results

As of November 2021, data collection for both phases of the study is complete. In July 2021, 51 participants had provided informed consent and completed the electronic survey. In October 2021, focus group discussions were held. Nine participants in total participated in two virtual focus group discussions. As of May 2022, data are being analyzed.

Conclusions

This study supports the development of a reporting checklist for studies of HIV drug resistance by achieving agreement among experts on what items should be reported in these studies. The results of this work will be refined and elaborated on by a writing committee of HIV drug resistance experts and external reviewers to develop finalized reporting guidelines.

International Registered Report Identifier (IRRID)

DERR1-10.2196/35969

Measures of Retention in HIV Care: A Study Within a Review

People living with HIV (PLHIV) need lifelong medical care. However, retention in HIV care is not measured uniformly, making it challenging to compare or pool data. The objective of this study within a review (SWAR) is to describe the assortment of definitions used for retention in HIV care in randomized controlled trials (RCTs). We conducted a SWAR, drawing data from an overview of systematic reviews on interventions to improve the HIV care cascade. Ethics review was not required for this analysis of secondary data. We identified RCTs of interventions used to improve retention in care for PLHIV, including all age groups and extracted the definitions used and their characteristics. We identified 50 trials that measured retention published between 2007 and 2021 and provided 59 definitions for retention in care. The definitions consisted of nine different characteristics with follow-up time (n = 47), and clinical visits (n = 36) most used. The definitions of retention in HIV care are highly heterogeneous. In this study, we present the pros and cons of characteristics used to measure retention in HIV care.

Individuals' experiences of the integration of substance use/addiction and HIV/AIDS services in community settings: a qualitative systematic review protocol

OBJECTIVE

The objectives of this systematic review are: i) to identify, appraise, and synthesize the best available evidence on individuals' experiences of the integration of substance use/addiction and HIV/AIDS services in community settings, and ii) to identify barriers to and facilitators of the integration of the services.

INTRODUCTION

The integration of drug use treatment and HIV services has shown to improve HIV prevention, decrease HIV infection and progression, while improving access to social and support services among substance users. Combined pharmacological and behavioral drug use treatments have been proven to diminish behaviors that increase HIV risk, decrease incidence of the disease, and improve adherence to antiretroviral therapy among individuals who use drugs and are HIV-positive.

INCLUSION CRITERIA

The populations of interest in this review include patients who have experienced integrated substance use/addiction and HIV services, as well as health care professionals and policy makers who have been involved in developing or implementing integrated substance use/addiction and HIV/AIDS services. Eligible studies will focus on the views, attitudes, understandings, and perceptions of patients, health care professionals, and policy makers resulting from experience in developing or implementing strategies that have or could inform the integration of substance use/addiction and HIV/AIDS services in community settings.

METHODS

Searches will be conducted in MEDLINE, Embase, PsycINFO, and CINHAL. The search for unpublished studies will include OpenGrey, Grey Matters, New York Academy of Medicine's Grey Literature Report, ClinicalTrials.gov, and the WHO International Clinical Trials Registry Platform. Selected studies will be critically appraised by two independent reviewers for methodological quality. Data will be extracted and then synthesized following the JBI meta-aggregative approach.

SYSTEMATIC REVIEW REGISTRATION NUMBER

PROSPERO CRD42020185858.

Clinical Uncertainty in Large Vessel Occlusion ischemic stroke (CULVO): Does automated perfusion scanning make a difference? Protocol of an intrarater and interrater agreement study

BACKGROUND

Guidelines recommend the use of perfusion computed tomography (CT) to identify emergent large vessel ischemic stroke (ELVIS) patients who are likely to benefit from endovascular thrombectomy (EVT) if they present within 6-24 hour (late window) of stroke onset. We aim to determine if the interrater and intrarater reliability among physicians when recommending EVT is significantly different when perfusion CT or non-perfusion CT is reviewed.

METHODS

A total of 30 non-consecutive patients will be selected from our institutional database comprising 3144 cranial CT scans performed for acute stroke symptoms January 2018 to August 2022. The clinical and radiologic data of the 30 patients will be presented in random order to a group of 29 physicians in two separate sessions at least three weeks apart. In each session, the physicians will evaluate each patient once with automated perfusion images and once without. We will use non-overlapping 95% confidence intervals and difference in agreement classification as criteria to suggest a difference between the Gwet AC1 statistics (κG).

DISCUSSION

The results obtained from this study, combined with the clinical outcomes data of patients categorized through the two imaging techniques and a cost-effectiveness analysis, will offer a comprehensive evaluation of the clinical utility of perfusion CT neuroimaging. Should there be no significant disparity in the reliability of decisions made by clinicians using the two neuroimaging protocols, it may be necessary to revise existing recommendations regarding neuroimaging in the later time window to align with these findings.

HIV prevention and treatment interventions for black men who have sex with men in Canada: a protocol for a scoping systematic review

INTRODUCTION

Globally, rates of HIV are disproportionately high among black men who have sex with men (MSM). In Canada, race, gender and sexuality have been investigated as separate factors that influence quality of care within and progression along the HIV care continuum. Traditional compartmental approaches to synthesising the HIV care continuum literature do not sufficiently account for intersectional experiences and marginalisation of Black MSM (BMSM). Moreover, there is limited research outlining access to and quality of care as specific barriers to progression along the care continuum among BMSM in Canada.

OBJECTIVES

The primary objective of this scoping review is to assess the state of the science regarding the influence of access to and quality of HIV care continuum outcomes for BMSM in Canada.

METHODS AND ANALYSIS

We will conduct a systematic search of published literature of quantitative and qualitative studies published on Canadian BMSM's healthcare and HIV status. The searches will be conducted through MEDLINE, Excerpta Medica Database, Cumulative Index to Nursing and Allied Health Literature, the Cochrane Library, the NHUS Economic Development Database, Global Health, APA PsychInfo, PubMed and Web of Science.

ELIGIBILITY CRITERIA

Eligible studies will include data on black MSM living with or without HIV in Canada and must be published after 1983 in either English or French. Screening and data extraction will be conducted in duplicate. Any discrepancies that arise will be resolved by consulting a third author. The findings will subsequently be reported according to the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews.

ETHICS AND DISSEMINATION

Ethics approval is not required as secondary published data will be used. Our findings will be disseminated as peer-reviewed manuscripts, at conferences, student rounds and could be of interest to government health agencies and HIV/AIDS service organisations.

Developing a reporting item checklist for studies of HIV drug resistance prevalence or incidence: a mixed methods study

BACKGROUND

Adequate surveillance of HIV drug resistance prevalence is challenged by heterogenous and inadequate data reporting. To address this issue, we recently published reporting guidance documentation for studies of HIV drug resistance prevalence and incidence.

OBJECTIVES

In this study, we describe the methods used to develop this reporting guidance.

DESIGN

We used a mixed-methods sequential explanatory design involving authors and users of studies of HIV drug resistance prevalence. In the quantitative phase, we conducted a cross-sectional electronic survey (n=51). Survey participants rated various reporting items on whether they are essential to report. Validity ratios were computed to determine the items to discuss in the qualitative phase. In the qualitative phase, two focus group discussions (n=9 in total) discussed this draft item checklist, providing a justification and examples for each item. We conducted a descriptive qualitative analysis of the group discussions to identify emergent themes regarding the qualities of an essential reporting item.

RESULTS

We identified 38 potential reporting items that better characterise the study participants, improve the interpretability of study results and clarify the methods used for HIV resistance testing. These items were synthesised to create the reporting item checklist. Qualitative insights formed the basis of the explanation, elaboration, and rationale components of the guidance document.

CONCLUSIONS

We generated a list of reporting items for studies on the incidence or prevalence of HIV drug resistance along with an explanation of why researchers believe these items are important. Mixed methods allowed for the simultaneous generation and integration of the item list and qualitative insights. The integrated findings were then further developed to become the subsequently published reporting guidance.

Exploring Facilitators and Barriers to STD/STI/HIV Self-Testing Among College Students in the United States: A Scoping Review

BACKGROUND

HIV affects 1.2 million Americans, with 20% of new diagnoses being 13 to 24-year-olds. Young adult college students are more likely than the general population of 18 to 24-year-olds in the U.S. to engage in sexual practices that increase their risk of STIs.

OBJECTIVES

This scoping review explores factors that promote or hinder STD/STI/HIV self-testing among U.S. college students.

SEARCH METHODS

A scoping review of original, experimental (randomized or nonrandomized), observational (longitudinal and cross-sectional), and qualitative or mixed-methods U.S. research was conducted using OVID Medline, OVID Embase, PubMed, CINAHL, Web of Science Core Collection, and Cochrane CENTRAL. English-language studies measured STD/STI/HIV self-test kits and college student testing.

SELECTION CRITERIA

Inclusion and exclusion criteria were used to narrow down articles that addressed barriers and facilitators to STD/STI/HIV testing, and self-testing among college students in the U.S.

RESULTS

Database searches yielded 8,373 articles. After removing duplicates, 6173 items remained. After independent dual-title/abstract screening, 100 papers were full-text reviewed. Seven retrieved articles were unavailable, and 93 were selected for full-text screening. After reviewing the whole text, 89 papers did not fulfill the inclusion requirements and were deleted, leaving 4 articles in the final analysis.

CONCLUSION

Additional research on self-testing among college students in the U.S. is urgently required. The results should guide university health policies on the need to cater to the unique requirements of college students by increasing the availability of healthcare and embracing STD/STI/HIV self-testing. This can enhance testing rates, diminish stigmas, and ultimately contribute to wider endeavors to reduce the transmission of infections in the U.S.

Risk of transmission of HIV to infants during breast/chest feeding when mothers/birthing parents living with HIV are on antiretroviral therapy: a protocol for a rapid review

INTRODUCTION

HIV is a major public health issue affecting millions globally. Women and girls account for 46% of new HIV infections in 2022 and approximately 1.3 million females become pregnant every year. Vertical transmission of HIV from persons living with HIV (PLHIV) to infants may occur through different modalities, such as through breast/chest feeding. Notably, 82% of PLHIV who chose to breast/chest feed are on antiretroviral therapy (ART) when feeding their infants. Precise estimates of the risk of postpartum transmission to infants during breast/chest feeding at varying viral load levels remain a significant gap in the literature.

METHODS AND ANALYSIS

A rapid systematic search of electronic databases will be conducted from January 2005 to the present, including Medline, Embase and Global Health. The objective of this rapid review is to explore and assess the available evidence on the effect of varying viral load levels on the risk of HIV transmission to infants during breast/chest feeding when the birthing or gestational parent living with HIV is on ART. Study characteristics will be summarised and reported to support the narrative summary of the findings. The focus will be on the absolute risk of HIV transmission from birthing parent to infant during chest/breast feeding. The findings will also be stratified by month, including the risk of HIV transmission for 6 months and greater than 6 months postpartum. We will ascertain the risk of bias using A Measurement Tool to Assess Systematic Reviews 2, Quality of Prognosis Studies and Downs and Black checklist for the appropriate study type. A summary score will not be calculated, rather the strengths and limitations of the studies will be narratively described.

ETHICS AND DISSEMINATION

No human subjects will be involved in the research. The findings of this rapid review will inform a future systematic review and will be disseminated through peer-reviewed publications, presentations and conferences.

PROSPERO REGISTRATION NUMBER

CRD42024499393.

Barriers and facilitators to providing human immunodeficiency virus pre-exposure prophylaxis decision support to black patients in Canada: a cross-sectional study

Introduction: Healthcare settings can build towards a specific social environment, in which Black patients can make informed health decisions, including those about whether or not to use PrEP. We utilize self-determination theory for guidance to identify the extent to which current HIV pre-exposure prophylaxis (PrEP) decision support practices from healthcare professionals (HCP) are autonomy supportive. This identifies future developments and implementations of interventions for HCP capacity building to enhance the autonomy of Black patients who are considering using PrEP. Methods: Using a cross-sectional design for examining HCPs' perspectives on delivering quality PrEP usage-related decision support. Through a cross-sectional online survey of 24 HCP from 10 community-based health centers serving in Toronto, Canada, descriptive statistics were characterized in close-ended survey data and sample.  Open-ended survey responses were analyzed using Q- sorting methodology. Results: Of the HCP, 40%  were willing to provide PrEP decision support to Black-identified patients. HCP reported barriers of needing education about PrEP and available resources (96%) There’s a need for more education and resources to facilitate decision support for Black patients to improve decision support and reduce PrEP uptake disparities. Conclusion: It is imperative that cultural humility in healthcare is upheld to provide informed decision support since not only health conditions vary from patient to patient, but life experiences and background are equally crucial to the health status of that individual. Competence development among HCP can take the forms of providing training to increase cultural humility awareness, knowledge, and skills that can build towards an environment in which Black patients are informed about and for their health decisions.

HIV Prevention and Treatment Interventions for Black Men Who Have Sex With Men in Canada: Scoping Systematic Review

BACKGROUND

Black men who have sex with men (MSM) experience disproportionately high HIV incidence globally. A comprehensive, intersectional approach (race, gender, and sexuality or sexual behavior) in understanding the experiences of Black MSM in Canada along the HIV prevention and care continuums has yet to be explored.

OBJECTIVE

This scoping review aims to examine the available evidence on the access, quality, gaps, facilitators, and barriers of engagement and identify interventions relevant to the HIV prevention and care continuum for Black MSM in Canada.

METHODS

We conducted a systematic database search, in accordance with the PRISMA-ScR (Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews) checklist, of the available studies on HIV health experience and epidemiology concerning Black MSM living with or without HIV in Canada and were published after 1983 in either English or French. Searched databases include MEDLINE, Excerpta, Cumulative Index to Nursing and Allied Health Literature, the Cochrane Library, the NHUS Economic Development Database, Global Health, PsycInfo, PubMed, Scopus, and Web of Science. From the 3095 articles identified, 19 met the inclusion criteria and were analyzed.

RESULTS

Black MSM in Canada consistently report multiple forms of stigma and lack of community support contributing to an increased HIV burden. They experience discrimination based on their intersectional identities while accessing HIV preventative and treatment interventions. Available data demonstrate that Black MSM have higher HIV incidences than Black men who have sex with women (MSW) and White MSM, and low preexposure prophylaxis knowledge and HIV literacy. Black MSM experience significant disparities in HIV prevention and care knowledge, access, and use. Structural barriers, including anti-Black racism, homophobia, and xenophobia, are responsible for gaps in HIV prevention and care continuums, poor quality of care and linkage to HIV services, as well as a higher incidence of HIV.

CONCLUSIONS

Considering the lack of targeted interventions, there is a clear need for interventions that reduce HIV diagnoses among Black MSM, increase access and reduce structural barriers that significantly affect the ability of Black MSM to engage with HIV prevention and care, and address provider's capacity for care and the structural barriers. These findings can inform future interventions, programming, and tools that may alleviate this HIV inequity.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

RR2-10.1136/bmjopen-2020-043055.

Clinical uncertainty in large vessel occlusion ischemic stroke: does automated perfusion imaging make a difference? An intra-rater and inter-rater agreement study

BACKGROUND

Limited research exists regarding the impact of neuroimaging on endovascular thrombectomy (EVT) decisions for late-window cases of large vessel occlusion (LVO) stroke.

OBJECTIVE

T0 assess whether perfusion CT imaging: (1) alters the proportion of recommendations for EVT, and (2) enhances the reliability of EVT decision-making compared with non-contrast CT and CT angiography.

METHODS

We conducted a survey using 30 patients drawn from an institutional database of 3144 acute stroke cases. These were presented to 29 Canadian physicians with and without perfusion imaging. We used non-overlapping 95% confidence intervals and difference in agreement classification as criteria to suggest a difference between the Gwet AC1 statistics (κG).

RESULTS

The percentage of EVT recommendations differed by 1.1% with or without perfusion imaging. Individual decisions changed in 21.4% of cases (11.3% against EVT and 10.1% in favor). Inter-rater agreement (κG) among the 29 raters was similar between non-perfusion and perfusion CT neuroimaging (κG=0.487; 95% CI 0.327 to 0.647 and κG=0.552; 95% CI 0.430 to 0.675). The 95% CIs overlapped with moderate agreement in both. Intra-rater agreement exhibited overlapping 95% CIs for all 28 raters. κG was either substantial or excellent (0.81-1) for 71.4% (20/28) of raters in both groups.

CONCLUSIONS

Despite the minimal difference in overall EVT recommendations with either neuroimaging protocol one in five decisions changed with perfusion imaging. Regarding agreement we found that the use of automated CT perfusion images does not significantly impact the reliability of EVT decisions for patients with late-window LVO.

The National and Global Impact of Systemic and Structural Violence on the Effective Prevention, Treatment, and Management of COVID-19 in African or Black Communities: Protocol for a Scoping Review

BACKGROUND

As COVID-19 ravages the globe and cases increase rapidly, countries are presented with challenging policy choices to contain and mitigate its spread. In Canada and globally, the COVID-19 pandemic has added a new stratum to the debate concerning the root causes of global and racial health inequities and disparities. Individuals who exist as targets of systemic inequities are not only more susceptible to contracting COVID-19, but also more likely to bear the greatest social, economic, and physical burdens. Therefore, data collection that focuses on the impact of COVID-19 on the lives and health of African/Black communities worldwide is needed to develop intersectional, culturally relative, antiracist/antioppression, and empowerment-centered interventions and social policies for supporting affected communities.

OBJECTIVE

The primary objective of this review is to investigate the impact and management of COVID-19 among African/Black individuals and communities, and understand how anti-Black racism and intersectional violence impact the health of African/Black communities during the pandemic. Moreover, the study aims to explore research pertaining to the impact of COVID-19 on Black communities in the global context. We seek to determine how Black communities are impacted with regard to structural violence, systematic racism, and health outcomes, and the ways in which attempts have been made to mitigate or manage the consequences of the pandemic and other injurious agents.

METHODS

A systematic search of quantitative and qualitative studies published on COVID-19 will be conducted in MEDLINE (Ovid), Embase (Ovid), Cumulative Index to Nursing and Allied Health Literature (EBSCO), Cochrane Library, PsychInfo (Ovid), CAB Abstracts (Ovid), Scopus (Elsevier), Web of Science (Clarivate), and Global Index Medicus. To be included in the review, studies should present data on COVID-19 in relation to African/Black individuals, populations, and communities in the global sphere. Studies must discuss racism, oppression, antioppression, or systemic and structural violence and be published in English, French, Spanish, or Portuguese. According to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews guidelines, the findings will be synthesized quantitatively and qualitatively through thematic analysis. The risk of bias will not be assessed.

RESULTS

Title, abstract, and full-text screening concluded in June 2022. Data collection is in progress and is expected to be completed by December 2022. Data analysis and drafting of the manuscript will be done thereafter. Findings from the scoping review are expected to be provided for peer review in 2023.

CONCLUSIONS

This review will collect important data and evidence related to COVID-19 in African/Black communities. The findings could help identify existing gaps in COVID-19 management in African/Black communities and inform future research paradigms. Furthermore, the findings could be applied to decision-making for health policy and promotion, and could potentially influence services provided by health care facilities and community organizations around the globe.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

DERR1-10.2196/40381.

Scoping review of HIV-related intersectional stigma among sexual and gender minorities in sub-Saharan Africa

OBJECTIVES

Sexual and gender minority (SGM) populations in sub-Saharan Africa (SSA) are disproportionately impacted by HIV and often face multiple HIV-related stigmas. Addressing these stigmas could reduce SGM HIV vulnerability but little is known about how the stigmas operate and intersect. Intersectional stigma offers a lens for understanding the experiences of stigmatised populations and refers to the synergistic negative health effects of various systems of oppression on individuals with multiple stigmatised identities, behaviours or conditions. This review aims to (1) assess how often and in what ways an intersectional lens is applied in HIV-related stigma research on SGM populations in SSA and (2) understand how intersectional stigma impacts HIV risk in these populations.

DESIGN

Scoping review following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Reviews.

DATA SOURCES

Public health and regional databases were searched in 2020 and 2022.

ELIGIBILITY CRITERIA

Articles in French and English on HIV-related stigma and HIV outcomes among men who have sex with men, women who have sex with women and/or transgender individuals in SSA.

DATA EXTRACTION AND SYNTHESIS

Articles were screened and extracted twice and categorised by use of an intersectional approach. Study designs and stigma types were described quantitatively and findings on intersectional stigma were thematically analysed.

RESULTS

Of 173 articles on HIV-related stigma among SGM in SSA included in this review, 21 articles (12%) applied an intersectional lens. The most common intersectional stigmas investigated were HIV and same-sex attraction/behaviour stigma and HIV, same-sex attraction/behaviour and gender non-conformity stigma. Intersectional stigma drivers, facilitators and manifestations were identified across individual, interpersonal, institutional and societal socioecological levels. Intersectional stigma impacts HIV vulnerability by reducing HIV prevention and treatment service uptake, worsening mental health and increasing exposure to HIV risk factors.

CONCLUSION

Intersectional approaches are gaining traction in stigma research among SGM in SSA. Future research should prioritise quantitative and mixed methods investigations, diverse populations and intervention evaluation.

Association between different levels of suppressed viral load and the risk of sexual transmission of HIV among serodiscordant couples on antiretroviral therapy: a protocol for a two-step systematic review and individual participant data meta-analysis

INTRODUCTION

HIV is a major global public health issue. The risk of sexual transmission of HIV in serodiscordant couples when the partner living with HIV maintains a suppressed viral load of <200 copies of HIV copies/mL has been found in systematic reviews to be negligible. A recent systematic review reported a similar risk of transmission for viral load<1000 copies/mL, but quantitative transmission risk estimates were not provided. Precise estimates of the risk of sexual transmission at sustained viral load levels between 200 copies/mL and 1000 copies/mL remain a significant gap in the literature.

METHODS AND ANALYSIS

A systematic search of various electronic databases for the articles written in English or French will be conducted from January 2000 to October 2023, including MEDLINE, Embase, the Cochrane Central Register of Controlled Trials via Ovid and Scopus. The first step of a two-step meta-analysis will consist of a systematic review along with a meta-analysis, and the second step will use individual participant data for meta-analysis. Our primary outcome is the risk of sexual HIV transmission in serodiscordant couples where the partner living with HIV is on antiretroviral therapy. Our secondary outcome is the dose-response association between different levels of viral load and the risk of sexual HIV transmission. We will ascertain the risk of bias using the Risk Of Bias in Non-randomised Studies of Interventions (ROBINS-I) and Quality in Prognostic Studies (QUIPS), the risk of publication bias using forest plots and Egger's test and heterogeneity using I2. A random effects model will estimate the pooled incidence of sexual HIV transmission, and multivariate logistic regression will be used to assess the viral load dose-response relationships. The Grading of Recommendations, Assessment, Development and Evaluation system will determine the certainty of evidence.

ETHICS AND DISSEMINATION

The meta-analysis will be conducted using deidentified data. No human subjects will be involved in the research. Findings will be disseminated through peer-reviewed publications, presentations and conferences.

PROSPERO REGISTRATION NUMBER

CRD42023476946.