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Djiadeu P, Begum H, Archibald C, Ekmekjian T, Busa G, Dansoh J, Van Nguyen P, Merckx J, Fleurant A. 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. BMJ Open 2024; 14:e084436. [PMID: 38719325 PMCID: PMC11086518 DOI: 10.1136/bmjopen-2024-084436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 04/12/2024] [Indexed: 05/12/2024] Open
Abstract
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.
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Affiliation(s)
- Pascal Djiadeu
- Public Health Agency of Canada, Ottawa, Ontario, Canada
- STBBI Guidance, Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - Housne Begum
- Public Health Agency of Canada, Ottawa, Ontario, Canada
- STBBI Guidance, Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - Chris Archibald
- Public Health Agency of Canada, Ottawa, Ontario, Canada
- STBBI Guidance, Public Health Agency of Canada, Ottawa, Ontario, Canada
| | | | - Giovanna Busa
- Public Health Agency of Canada, Ottawa, Ontario, Canada
- STBBI Guidance, Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - Jeffery Dansoh
- Public Health Agency of Canada, Ottawa, Ontario, Canada
- STBBI Guidance, Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - Phu Van Nguyen
- Public Health Agency of Canada, Ottawa, Ontario, Canada
- STBBI Guidance, Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - Joanna Merckx
- Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - Annie Fleurant
- Public Health Agency of Canada, Ottawa, Ontario, Canada
- STBBI Guidance, Public Health Agency of Canada, Ottawa, Ontario, Canada
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Garcia C, Holbrook A, Djiadeu P, Alvarez E, Matos Silva J, Mbuagbaw L. Developing a reporting item checklist for studies of HIV drug resistance prevalence or incidence: a mixed methods study. BMJ Open 2024; 14:e080014. [PMID: 38548361 PMCID: PMC10982790 DOI: 10.1136/bmjopen-2023-080014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 03/18/2024] [Indexed: 04/02/2024] Open
Abstract
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.
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Affiliation(s)
- Cristian Garcia
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Anne Holbrook
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Division of Clinical Pharmacology and Toxicology, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
- Clinical Pharmacology & Toxicology Research, Research Institute of St Joes Hamilton, St Joseph's Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Pascal Djiadeu
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
- Centre for Urban Health Solutions, St Michael's Hospital, Toronto, Ontario, Canada
| | - Elizabeth Alvarez
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Centre for Health Economics and Policy Analysis (CHEPA), McMaster University, Hamilton, Ontario, Canada
| | - Jéssyca Matos Silva
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Lawrence Mbuagbaw
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Department of Clinical Epidemiology & Biostatistics, McMaster University, Hamilton, Ontario, Canada
- Division of Epidemiology and Biostatistics, Department of Global Health, Stellenbosch University, Cape Town, South Africa
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Diestro JDB, Fahed R, Omar AT, Hawkes C, Hendriks EJ, Enriquez C, Eesa M, Stotts G, Lee H, Nagendra S, Poppe A, Ducroux C, Lim T, Narvacan K, Rizzuto M, Alfalahi A, Nishi H, Sarma P, Itsekson Hayosh Z, Ignacio K, Boisseau W, Pimenta Ribeiro Pontes Almeida E, Benomar A, Almekhlafi MA, Milot G, Deshmukh A, Kishore K, Tampieri D, Wang J, Srivastava A, Roy D, Carpani F, Kashani N, Candale-Radu C, Singh N, Bres Bullrich M, Sarmiento R, Muir RT, Parra-Fariñas C, Reiter S, Deschaintre Y, Singh RJ, Bodani V, Katsanos A, Agid R, Zafar A, Pereira VM, Spears J, Marotta TR, Djiadeu P, Sharma S, Farrokhyar F. Clinical uncertainty in large vessel occlusion ischemic stroke: does automated perfusion imaging make a difference? An intra-rater and inter-rater agreement study. J Neurointerv Surg 2024:jnis-2023-021429. [PMID: 38453461 DOI: 10.1136/jnis-2023-021429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 02/18/2024] [Indexed: 03/09/2024]
Abstract
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.
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Affiliation(s)
- Jose Danilo Bengzon Diestro
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Divison of Neurology, Department of Medicine, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
- Li Ka Shing Knowledge Insitute, St. Michael's Hospital- Unity Health Toronto, Toronto, Ontario, Canada
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Robert Fahed
- Division Neurology, Department of Medicine, The Ottawa Hospital - Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Abdelsimar Tan Omar
- Division of Neurosurgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Christine Hawkes
- Division of Neurology, Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Eef J Hendriks
- Division of Interventional Neuroradiology, Joint Department of Medical Imaging (JDMI), Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Clare Enriquez
- Division of Neurology, Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Muneer Eesa
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | - Grant Stotts
- Division Neurology, Department of Medicine, The Ottawa Hospital - Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Hubert Lee
- Division of Neurointerventional Neuroradiology, Division of Neurosurgery, Trillium Health Partners, Mississauga, Ontario, Canada
| | - Shashank Nagendra
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Alexandre Poppe
- Department of Neurosciences, Faculté de Médecine, Université de Montréal, Montréal, Quebec, Canada
| | - Célina Ducroux
- Division Neurology, Department of Medicine, The Ottawa Hospital - Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Timothy Lim
- Division of Diagnostic Neuroradiology, Department of Medical Imaging, Unity Health- St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Karl Narvacan
- Department of Medical Imaging, St Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Michael Rizzuto
- Division of Neurosurgery, Department of Surgery, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Afra Alfalahi
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Hidehisa Nishi
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
- Department of Neurosurgery, Koseikai Takeda hospital, Kyoto, Japan
| | - Pragyan Sarma
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Ze'ev Itsekson Hayosh
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
- Division of Interventional Neuroradiology, Joint Department of Medical Imaging (JDMI), Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Katrina Ignacio
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - William Boisseau
- Department of Interventional Neuroradiology, Fondation Rothschild Hospital, Paris, France
| | | | - Anass Benomar
- Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - Mohammed A Almekhlafi
- Departments of Clinical Neurosciences, Radiology, and Community Health Sciences, Hotchkiss Brain Institute and O'Brien Institute for Public Health, Cumming School of Medicine at the University of Calgary, Calgary, Alberta, Canada
| | - Genvieve Milot
- Department of Surgery (Neurosurgery), Centre Hospitalier de Quebec, Université Laval, Laval, Quebec, Canada
| | - Aviraj Deshmukh
- Division of Clinical Sciences, Health Sciences North, Northern Ontario School of Medicine University, Sudbury, Ontario, Canada
| | - Kislay Kishore
- Division of Neurosurgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Donatella Tampieri
- Department of Radiology, Kingston Health Sciences Centre, Queen's University, Kingston, Ontario, Canada
| | - Jeffrey Wang
- Divison of Neurology, Department of Medicine, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Abhilekh Srivastava
- Division of Neurology, Department of Medicine, Hamilton General Hospital, McMaster University, Hamilton, Ontario, Canada
| | - Daniel Roy
- Département de Radiologie, Radio-Oncologie et Médecine Nucléaire, Université de Montréal, Montréal, Quebec, Canada
| | - Federico Carpani
- Division of Neurology, Department of Medicine, Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Nima Kashani
- Department of Medical Imaging, Royal University Hospital, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Claudia Candale-Radu
- Division of Neurology, Department of Internal Medicine, Health Sciences Center, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Nishita Singh
- Division of Neurology, Department of Internal Medicine, Health Sciences Center, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Maria Bres Bullrich
- Department of Clinical Neurological Sciences, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Robert Sarmiento
- Division of Neurology, Department of Medicine, Vancouver General Hospital- University of British Columbia, Vancouver, British Columbia, Canada
| | - Ryan T Muir
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Carmen Parra-Fariñas
- Divisions of Neuroradiology & Neurointervention, Department of Diagnostic & Interventional Radiology, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Stephanie Reiter
- Division of Neurology, Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Yan Deschaintre
- Department of Neurosciences, Faculté de Médecine, Université de Montréal, Montréal, Quebec, Canada
| | - Ravinder-Jeet Singh
- Division of Clinical Sciences, Health Sciences North, Northern Ontario School of Medicine University, Sudbury, Ontario, Canada
| | - Vivek Bodani
- Division of Interventional Neuroradiology, Joint Department of Medical Imaging (JDMI), Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Aristeidis Katsanos
- Division of Neurology, Department of Medicine, Hamilton General Hospital, McMaster University, Hamilton, Ontario, Canada
| | - Ronit Agid
- Division of Interventional Neuroradiology, Joint Department of Medical Imaging (JDMI), Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Atif Zafar
- Divison of Neurology, Department of Medicine, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Vitor M Pereira
- Li Ka Shing Knowledge Insitute, St. Michael's Hospital- Unity Health Toronto, Toronto, Ontario, Canada
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
- Division of Neurosurgery, Department of Surgery, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Julian Spears
- Division of Neurosurgery, Department of Surgery, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Thomas R Marotta
- Li Ka Shing Knowledge Insitute, St. Michael's Hospital- Unity Health Toronto, Toronto, Ontario, Canada
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, St. Michael's Hospital- Unity Health Toronto, University of Toronto, Toronto, Ontario, Canada
| | - Pascal Djiadeu
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Department of Global Health, McMaster University, Hamilton, Ontario, Canada
| | - Sunjay Sharma
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Division of Neurosurgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Forough Farrokhyar
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Department of Global Health, McMaster University, Hamilton, Ontario, Canada
- Department of Surgery, McMaster University, Hamilton, Ontario, Canada
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Dada D, Abu-Ba'are GR, Turner D, Mashoud IW, Owusu-Dampare F, Apreku A, Ni Z, Djiadeu P, Aidoo-Frimpong G, Zigah EY, Nyhan K, Nyblade L, Nelson LE. Scoping review of HIV-related intersectional stigma among sexual and gender minorities in sub-Saharan Africa. BMJ Open 2024; 14:e078794. [PMID: 38346887 PMCID: PMC10862343 DOI: 10.1136/bmjopen-2023-078794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 01/09/2024] [Indexed: 02/15/2024] Open
Abstract
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.
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Affiliation(s)
- Debbie Dada
- School of Nursing, Yale University, New Haven, Connecticut, USA
- St Michael's Hospital Centre for Urban Health Solutions, Toronto, Ontario, Canada
| | - Gamji R Abu-Ba'are
- Center for Interdisciplinary Research on AIDS, School of Public Health, Yale University, New Haven, Connecticut, USA
- Behavioral, Sexual, and Global Health Lab, University of Rochester, Rochester, New York, USA
| | | | | | | | | | - Zhao Ni
- School of Medicine, Yale University, New Haven, Connecticut, USA
| | - Pascal Djiadeu
- St Michael's Hospital Centre for Urban Health Solutions, Toronto, Ontario, Canada
- School of Public Health, University of Toronto Dalla Lana, Toronto, Ontario, Canada
| | - Gloria Aidoo-Frimpong
- Center for Interdisciplinary Research on AIDS, School of Public Health, Yale University, New Haven, Connecticut, USA
| | - Edem Yaw Zigah
- Behavioral, Sexual, and Global Health Lab, University of Rochester, Rochester, New York, USA
| | - Kate Nyhan
- Harvey Cushing/John Hay Whitney Medical Library, Yale University, New Haven, Connecticut, USA
| | - Laura Nyblade
- Research Triangle Institute, Research Triangle Park, North Carolina, USA
| | - LaRon E Nelson
- School of Nursing, Yale University, New Haven, Connecticut, USA
- St Michael's Hospital Centre for Urban Health Solutions, Toronto, Ontario, Canada
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Diestro JDB, Fahed R, Benomar A, Omar AT, Pereira VM, Spears J, Marotta TR, Djiadeu P, Sharma S, Farrokhyar F. Clinical Uncertainty in Large Vessel Occlusion ischemic stroke (CULVO): Does automated perfusion scanning make a difference? Protocol of an intrarater and interrater agreement study. PLoS One 2024; 19:e0297520. [PMID: 38289912 PMCID: PMC10826946 DOI: 10.1371/journal.pone.0297520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 01/04/2024] [Indexed: 02/01/2024] Open
Abstract
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.
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Affiliation(s)
- Jose Danilo Bengzon Diestro
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, Unity Health- St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Robert Fahed
- Division of Neurology, Department of Medicine, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Anass Benomar
- Department of Radiology, Centre Hospitalier de l’Université de Montréal (CHUM), Montreal, Quebec, Canada
| | - Abdelsimar T. Omar
- Division of Neurosurgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
- Harvard TH Chan School of Public Health, Harvard University, Boston, Massachusetts, United States of America
| | - Vitor Mendes Pereira
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, Unity Health- St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
- Division of Neurosurgery, Department of Surgery, Unity Health- St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Julian Spears
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, Unity Health- St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
- Division of Neurosurgery, Department of Surgery, Unity Health- St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Thomas R. Marotta
- Division of Diagnostic and Therapeutic Neuroradiology, Department of Medical Imaging, Unity Health- St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Pascal Djiadeu
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Department of Global Health, McMaster University, Hamilton, Ontario, Canada
| | - Sunjay Sharma
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Division of Neurosurgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Forough Farrokhyar
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
- Department of Global Health, McMaster University, Hamilton, Ontario, Canada
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6
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Demeke J, Djiadeu P, Yusuf A, Whitfield DL, Lightfoot D, Worku F, Abu-Ba'are GR, Mbuagbaw L, Giwa S, Nelson LE. HIV Prevention and Treatment Interventions for Black Men Who Have Sex With Men in Canada: Scoping Systematic Review. JMIR Public Health Surveill 2024; 10:e40493. [PMID: 38236626 PMCID: PMC10835596 DOI: 10.2196/40493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 12/28/2022] [Accepted: 08/29/2023] [Indexed: 01/19/2024] Open
Abstract
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.
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Affiliation(s)
- Jemal Demeke
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Pascal Djiadeu
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Abban Yusuf
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | | | - David Lightfoot
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Fiqir Worku
- Institute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, ON, Canada
| | - Gamji Rabiu Abu-Ba'are
- Center for Interdisciplinary Research on AIDS, Yale School of Public Health, New Haven, CT, United States
| | - Lawrence Mbuagbaw
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Sulaimon Giwa
- School of Social Work, St John's College, Memorial University of Newfoundland, St John's, NL, Canada
| | - LaRon E Nelson
- School of Nursing, Yale University, New Haven, CT, United States
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7
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Djiadeu P, Begum H, Sabourin S, Gadient S, Archibald C, LeBlanc MA, Chittle A, Fleurant A, Cox J. Risk of sexual transmission of HIV in the context of viral load suppression. Can Commun Dis Rep 2023; 49:457-464. [PMID: 38504878 PMCID: PMC10946584 DOI: 10.14745/ccdr.v49i1112a01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Background In 2018, the Public Health Agency of Canada (PHAC) published a systematic review to calculate the risk of sexual transmission of human immunodeficiency virus (HIV) in the context of antiretroviral therapy (ART). In 2022, PHAC commissioned the Canadian Agency for Drugs and Technologies in Health (CADTH) to conduct a rapid review of evidence published since 2017. We undertook a meta-analysis of relevant studies from these two reviews. Methods Studies from the rapid review that adequately assessed exposure (HIV viral load) and outcome (HIV seroconversion) were included and assessed for risk of bias (RoB) and certainty of evidence. Results were pooled to estimate the risk of HIV transmission per 100 person-years. Results Three studies from the rapid review were eligible for inclusion and one was excluded after RoB assessment. In the remaining studies examining risk among people living with HIV who take ART and maintain a suppressed viral load (fewer than 200 copies/mL, measured every 4-6 months), no sexual transmissions of HIV were observed. The pooled incidence estimate based on these studies, and one from the 2018 PHAC review, was zero transmissions/100 person-years (95% CI: 0.00-0.10). No studies in the rapid review provided data on the risk of sexual transmission of HIV in situations of varying levels of viral load. Conclusion This update highlights the consistency of evidence since the 2018 PHAC review. There remains no evidence of HIV transmission to sexual partners when a person living with HIV is on ART and maintains a suppressed viral load.
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Affiliation(s)
- Pascal Djiadeu
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
| | - Housne Begum
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
| | - Stacy Sabourin
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
| | - Stephan Gadient
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
| | - Chris Archibald
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
| | - Marc-André LeBlanc
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
| | - Andrea Chittle
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
| | - Annie Fleurant
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
| | - Joseph Cox
- Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, ON
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8
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Mbuagbaw L, Garcia C, Brenner B, Cecchini D, Chakroun M, Djiadeu P, Holguin A, Mor O, Parkin N, Santoro MM, Ávila-Ríos S, Fokam J, Phillips A, Shafer RW, Jordan MR. Checklist for studies of HIV drug resistance prevalence or incidence: rationale and recommended use. Lancet HIV 2023; 10:e684-e689. [PMID: 37716367 PMCID: PMC11060097 DOI: 10.1016/s2352-3018(23)00173-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 05/24/2023] [Accepted: 07/05/2023] [Indexed: 09/18/2023]
Abstract
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.
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Affiliation(s)
- Lawrence Mbuagbaw
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada; Department of Anesthesia, McMaster University, Hamilton, ON, Canada; Department of Pediatrics, McMaster University, Hamilton, ON, Canada; Biostatistics Unit, Father Sean O'Sullivan Research Centre, St Joseph's Healthcare, Hamilton, ON, Canada; Centre for Development of Best Practices in Health, Yaoundé Central Hospital, Yaoundé, Cameroon; Department of Global Health, Stellenbosch University, Cape Town, South Africa.
| | - Cristian Garcia
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Bluma Brenner
- McGill Centre for Viral Diseases, Lady Davis Institute for Medical Research, Montréal, QC, Canada; Department of Microbiology and Immunology, McGill University, Montréal, QC, Canada; Department of Medicine, Surgery, and Infectious Disease, McGill University, Montréal, QC, Canada
| | - Diego Cecchini
- Hospital General de Agudos Dr. Cosme Argerich, Buenos Aires, Argentina; Helios Salud, Buenos Aires, Argentina
| | - Mohamed Chakroun
- Infectious Diseases Department, Fatouma Bourguiba University Hospital, Monastir, Tunisia
| | - Pascal Djiadeu
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada; Yale University School of Nursing, Yale University, West Haven, CT, USA; Centre for Urban Health Solutions, St Michael's Hospital, Toronto, ON, Canada
| | - Africa Holguin
- HIV-1 Molecular Epidemiology Laboratory, Microbiology and Parasitology Department, Hospital Ramón y Cajal-IRYCIS and CIBEREsp-RITIP, Madrid, Spain
| | - Orna Mor
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel; Central Virology Laboratory, Ministry of Health and Sheba Medical Centre, Tel-Hashomer, Israel
| | | | - Maria M Santoro
- Department of Experimental Medicine, University of Rome 'Tor Vergata', Rome, Italy
| | - Santiago Ávila-Ríos
- Instituto Nacional de Enfermedades Respiratorias, Mexico City, Mexico; Centro de Investigaciones en Enfermedades Infecciosas, Mexico City, Mexico
| | - Joseph Fokam
- Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management, Yaoundé, Cameroon; Faculty of Health Science, University of Buea, Buea, Cameroon; National HIV Drug Resistance Working Group, Ministry of Public Health, Yaoundé, Cameroon
| | - Andrew Phillips
- Institute for Global Health, University College London, London, UK
| | - Robert W Shafer
- Division of Infectious Diseases, Department of Medicine, Stanford University, Stanford, CA, USA
| | - Michael R Jordan
- Division of Geographic Medicine and Infectious Diseases, Tufts Medical Center, Boston, MA, USA; Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, MA, USA; Tufts Center for Integrated Management of Antimicrobial Resistance, Tufts University School of Medicine, Boston, MA, USA
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9
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Rehman N, Wu M, Garcia C, Leenus A, El-Kechen H, Bhandari M, Zakaryan G, Zani B, Hajizadeh A, Wang A, Morassut RE, Bartoszko JJ, Makanjuola O, Jhuti D, Arora V, Kapoor A, Jones A, Djiadeu P, Mbuagbaw L. Measures of Retention in HIV Care: A Study Within a Review. AIDS Patient Care STDS 2023; 37:192-198. [PMID: 36951646 DOI: 10.1089/apc.2022.0225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023] Open
Abstract
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.
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Affiliation(s)
- Nadia Rehman
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
| | - Michael Wu
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Canada
| | - Cristian Garcia
- Temerty Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Alvin Leenus
- Faculty of Law, University of Ottawa, Ottawa, Canada
| | - Hussein El-Kechen
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
| | - Manika Bhandari
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
| | - Gohar Zakaryan
- Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Babalwa Zani
- Public Health Research Unit, AB Consulting, Cape Town, South Africa
| | - Anisa Hajizadeh
- Nuffield Department of Primary Care Health Sciences, Oxford, United Kingdom
| | - Annie Wang
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
| | - Rita E Morassut
- Department of Obstetrics and Gynaecology Western University, London, Canada
| | - Jessica J Bartoszko
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
| | - Oluwatoni Makanjuola
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Canada
- Centre for Development of Best Practices in Health (CDBPH), Yaoundé Central Hospital, Yaoundé, Cameroon
| | - Diya Jhuti
- Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Vaibhav Arora
- Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Andrew Kapoor
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Canada
- Faculty of Health Sciences, McMaster University, Hamilton, Canada
- Department of Medicine, McMaster University, Hamilton, Canada
| | - Aaron Jones
- Faculty of Health Sciences, McMaster University, Hamilton, Canada
| | - Pascal Djiadeu
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Lawrence Mbuagbaw
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
- Department of Anesthesia, McMaster University, Hamilton, Canada
- Centre for Development of Best Practices in Health (CDBPH), Yaoundé Central Hospital, Yaoundé, Cameroon
- Department of Pediatrics, McMaster University, Hamilton, Canada
- Biostatistics Unit, Father Sean O'Sullivan Research Centre, St Joseph's Healthcare, Hamilton, Canada
- Division of Epidemiology and Biostatistics, Department of Global Health, Stellenbosch University, Cape Town, South Africa
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10
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Reeves JM, Zigah EY, Shamrock OW, Aidoo-Frimpong G, Dada D, Batten J, Abu-Ba'are GR, Nelson LE, Djiadeu P. 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. BMJ Open 2023; 13:e069574. [PMID: 36792328 PMCID: PMC9933744 DOI: 10.1136/bmjopen-2022-069574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
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.
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Affiliation(s)
- Jaquetta M Reeves
- College of Nursing and Health Innovation, The University of Texas Arlington, Arlington, Texas, USA
| | - Edem Yaw Zigah
- School of Nursing, University of Rochester, Rochester, New York, USA
| | - Osman W Shamrock
- School of Nursing, University of Rochester, Rochester, New York, USA
| | - Gloria Aidoo-Frimpong
- Center Interdisciplinary Research on AIDS, Yale University School of PublicHealth, New Haven, Connecticut, USA, New Haven, Connecticut, USA
| | - Debbie Dada
- School of Nursing, Yale University, New Haven, Connecticut, USA
- MAP Centre for Urban Health Solutions, St. Michael's Hospital, Unity Health Toronto, Toronto, Ontario, Canada
| | - Janene Batten
- Medical Library, Yale University, Harvey Cushing/John Hay Whitney Medical Library, New Haven, Connecticut, USA
| | - Gamji R Abu-Ba'are
- Center for Interdisciplinary Research on AIDS, Yale University School of Public Health, New Haven, Connecticut, USA
- School of Nursing, Behavioral, Sexual, and Global Health Lab, University of Rochester, Rochester, New York, USA
| | - LaRon E Nelson
- School of Nursing, Yale University, New Haven, Connecticut, USA
- MAP Centre for Urban Health Solutions, St. Michael's Hospital, Unity Health Toronto, Toronto, Ontario, Canada
| | - Pascal Djiadeu
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
- Health Research Methods Evidence and Impact, McMaster University, Faculty of Health Sciences, Hamilton, Ontario, Canada
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11
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Timothy R, Chin-See RA, Martyniuk J, Djiadeu P. The national and global impact of systemic and structural violence on the effective prevention, treatment and management of COVID-19 in the African/Black population: Protocol for a Scoping Review (Preprint). JMIR Res Protoc 2022; 11:e40381. [PMID: 36219749 PMCID: PMC9578518 DOI: 10.2196/40381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 09/22/2022] [Accepted: 09/24/2022] [Indexed: 11/25/2022] Open
Abstract
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
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Affiliation(s)
- Roberta Timothy
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | | | - Julia Martyniuk
- Gerstein Science Information Centre, University of Toronto, Toronto, ON, Canada
| | - Pascal Djiadeu
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
- Health Research Methods Evidence and Impact, McMaster University, Hamilton, ON, Canada
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12
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Ajiboye W, Nelson L, Odhiambo A, Yusuf A, Djiadeu P, Turner DA, Abubakari M, Pedersen C, Brown R, Ni Z, Guillaume G, Lofters A, Williams G. Decision conflict and the decision support needs of HIV PrEP-eligible Black patients in Toronto regarding the adoption of PrEP for HIV prevention. J Int Assoc Provid AIDS Care 2022; 21:23259582211073399. [PMID: 35098770 PMCID: PMC8808024 DOI: 10.1177/23259582211073399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
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.
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Affiliation(s)
- Wale Ajiboye
- St. Michael’s Hospital, Toronto, ON, Canada,Wale Ajiboye, PhD, St. Michael’s Hospital Toronto, ON, Canada.
| | - LaRon Nelson
- St. Michael’s Hospital, Toronto, ON, Canada,Yale School of Nursing, New Haven, CT, USA
| | | | | | | | | | | | | | | | - Zhao Ni
- Yale School of Nursing, New Haven, CT, USA
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13
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Garcia C, Rehman N, Lawson DO, Djiadeu P, Mbuagbaw L. Developing Reporting Guidelines for Studies of HIV Drug Resistance Prevalence: A Protocol for a Mixed-methods Study (Preprint). JMIR Res Protoc 2022; 11:e35969. [PMID: 35559984 PMCID: PMC9143765 DOI: 10.2196/35969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/10/2022] [Accepted: 04/25/2022] [Indexed: 11/14/2022] Open
Abstract
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
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Affiliation(s)
- Cristian Garcia
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Nadia Rehman
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Daeria O Lawson
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Pascal Djiadeu
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Lawrence Mbuagbaw
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
- Department of Anesthesia, McMaster University, Hamilton, ON, Canada
- Department of Pediatrics, McMaster University, Hamilton, ON, Canada
- Biostatistics Unit, Father Sean O'Sullivan Research Centre, St Joseph's Healthcare, Hamilton, ON, Canada
- Division of Epidemiology and Biostatistics, Department of Global Health, Stellenbosch University, Cape Town, South Africa
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14
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Guillaume G, Ramos SR, M'Rabiu Abubakari G, Turner DE, Ajiboye W, Yusuf A, Djiadeu P, Odhiambo AJ, Pedersen C, Lofters A, Williams G, Nelson LE. Barriers and facilitators to providing human immunodeficiency virus pre-exposure prophylaxis decision support to black patients in Canada: a cross-sectional study. Int Health Trends & Persp 2021. [DOI: 10.32920/ihtp.v1i3.1457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
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.
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15
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Nguemo Djiometio JB, Djiadeu P, Mbuagbaw L, Njoroge I, Nelson LE, Kahan M. Individuals' experiences of the integration of substance use/addiction and HIV/AIDS services in community settings: a qualitative systematic review protocol. JBI Evid Synth 2021; 18:2687-2693. [PMID: 32740031 DOI: 10.11124/jbisrir-d-19-00391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
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.
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Affiliation(s)
- Joseph B Nguemo Djiometio
- Daphne Cockwell School of Nursing, Faculty of Community Services, Ryerson University, Toronto, ON, Canada.,Substance Use Service/META:PHI, Women's College Hospital, Toronto, ON, Canada
| | - Pascal Djiadeu
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Lawrence Mbuagbaw
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Irene Njoroge
- Substance Use Service/META:PHI, Women's College Hospital, Toronto, ON, Canada
| | - LaRon E Nelson
- Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, ON, Canada.,School of Nursing, Yale University, New Haven, CT, USA
| | - Meldon Kahan
- Substance Use Service/META:PHI, Women's College Hospital, Toronto, ON, Canada
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Djiadeu P, Nur J, Mbuagbaw L, Giwa S, Whitfield D, Nelson LE. HIV prevention and treatment interventions for black men who have sex with men in Canada: a protocol for a scoping systematic review. BMJ Open 2021; 11:e043055. [PMID: 33766840 PMCID: PMC7996663 DOI: 10.1136/bmjopen-2020-043055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
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.
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Affiliation(s)
- Pascal Djiadeu
- Health Research Methods, Evidence and Impact, McMaster University, Faculty of Health Sciences, Hamilton, Ontario, Canada
- MAP Centre for Urban Health Solutions, Unity Health Toronto, Toronto, Ontario, Canada
| | - Jemal Nur
- MAP Centre for Urban Health Solutions, Unity Health Toronto, Toronto, Ontario, Canada
| | - Lawrence Mbuagbaw
- Health Research Methods, Evidence and Impact, McMaster University, Faculty of Health Sciences, Hamilton, Ontario, Canada
- Department of Clinical Epidemiology & Biostatistics, McMaster University, Hamilton, Ontario, Canada
| | - Sulaimon Giwa
- School of Social Work, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Darren Whitfield
- School of Social Work, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Laron E Nelson
- MAP Centre for Urban Health Solutions, Unity Health Toronto, Toronto, Ontario, Canada
- Yale School of Nursing, Yale University, New Haven, Connecticut, USA
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Djiadeu P, Yusuf A, Ongolo-Zogo C, Nguemo J, Odhiambo AJ, Mukandoli C, Lightfoot D, Mbuagbaw L, Nelson LE. Barriers in accessing HIV care for Francophone African, Caribbean and Black people living with HIV in Canada: a scoping review. BMJ Open 2020; 10:e036885. [PMID: 32859664 PMCID: PMC7454192 DOI: 10.1136/bmjopen-2020-036885] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
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.
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Affiliation(s)
- Pascal Djiadeu
- Department of Health Research Methods, Evidence and Impact, McMaster University, Faculty of Health Sciences, Hamilton, Ontario, Canada
- Yale University School of Nursing, Yale University, West Haven, Connecticut, USA
- Centre for Urban Health Solutions, St Michael's Hospital, Toronto, Ontario, Canada
| | - Abban Yusuf
- Centre for Urban Health Solutions, St Michael's Hospital, Toronto, Ontario, Canada
| | - Clémence Ongolo-Zogo
- Department of Health Research Methods, Evidence and Impact, McMaster University, Faculty of Health Sciences, Hamilton, Ontario, Canada
- Centre for Development of Best Practices in Health (CDBPH), Yaoundé Central Hospital, Yaoundé, Centre Province, Cameroon
| | - Joseph Nguemo
- Daphne Cockwell School of Nursing, Ryerson University, Toronto, Ontario, Canada
| | - Apondi J Odhiambo
- Centre for Urban Health Solutions, St Michael's Hospital, Toronto, Ontario, Canada
| | - Chantal Mukandoli
- Centre for Urban Health Solutions, St Michael's Hospital, Toronto, Ontario, Canada
- AFRICANS IN PARTNERSHIP AGAINST AIDS (APAA), Toronto, Ontario, Canada
| | - David Lightfoot
- St Michael's Health Sciences Library, St Michael's Hospital, Toronto, Ontario, Canada
| | - Lawrence Mbuagbaw
- Department of Health Research Methods, Evidence and Impact, McMaster University, Faculty of Health Sciences, Hamilton, Ontario, Canada
- Centre for Development of Best Practices in Health (CDBPH), Yaoundé Central Hospital, Yaoundé, Centre Province, Cameroon
- Biostatistics Unit, Father Sean O'Sullivan Research Centre, St Joseph's Healthcare, Hamilton, Ontario, Canada
| | - LaRon E Nelson
- Yale University School of Nursing, Yale University, West Haven, Connecticut, USA
- Centre for Urban Health Solutions, St Michael's Hospital, Toronto, Ontario, Canada
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Nelson LE, Ajiboye W, Djiadeu P, Odhiambo AJ, Pedersen C, Ramos SR, Lofters A, Mbuagbaw L, Williams G. A Web-Based Intervention to Reduce Decision Conflict Regarding HIV Pre-Exposure Prophylaxis: Protocol for a Clinical Trial. JMIR Res Protoc 2020; 9:e15080. [PMID: 32348250 PMCID: PMC7324994 DOI: 10.2196/15080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 11/29/2019] [Accepted: 02/04/2020] [Indexed: 01/08/2023] Open
Abstract
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
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Affiliation(s)
- LaRon E Nelson
- MAP Center for Urban Health Solution, St. Michael's Hospital, Toronto, ON, Canada.,Yale School of Nursing, Yale University, New Haven, CT, United States
| | - Wale Ajiboye
- MAP Center for Urban Health Solution, St. Michael's Hospital, Toronto, ON, Canada
| | - Pascal Djiadeu
- Department of Health Research Methods Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Apondi J Odhiambo
- MAP Center for Urban Health Solution, St. Michael's Hospital, Toronto, ON, Canada.,Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | - Cheryl Pedersen
- MAP Center for Urban Health Solution, St. Michael's Hospital, Toronto, ON, Canada
| | - S Raquel Ramos
- New York University, Rory Meyers College of Nursing, New York, NY, United States
| | - Aisha Lofters
- MAP Center for Urban Health Solution, St. Michael's Hospital, Toronto, ON, Canada
| | - Lawrence Mbuagbaw
- Department of Health Research Methods Evidence and Impact, McMaster University, Hamilton, ON, Canada
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Djiadeu P, Smith MDR, Kushwaha S, Odhiambo AJ, Absalom D, Husbands W, Tharao W, Regan R, Sa T, Zhang N, Kaul R, Nelson LE. Social, Clinical, and Behavioral Determinants of HIV Infection and HIV Testing among Black Men in Toronto, Ontario: A Classification and Regression Tree Analysis. J Int Assoc Provid AIDS Care 2020; 19:2325958220934613. [PMID: 32762398 PMCID: PMC7418239 DOI: 10.1177/2325958220934613] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 05/20/2020] [Accepted: 05/26/2020] [Indexed: 11/17/2022] Open
Abstract
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.
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Affiliation(s)
- Pascal Djiadeu
- School of Nursing, Yale University, Orange, CT, USA
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, Ontario, Canada
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Martez D. R. Smith
- School of Nursing, Yale University, Orange, CT, USA
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, Ontario, Canada
| | - Sameer Kushwaha
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Ontario, Canada
| | - Apondi J. Odhiambo
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, Ontario, Canada
| | - David Absalom
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, Ontario, Canada
| | | | - Wangari Tharao
- Women’s Health in Women’s Hands, Toronto, Ontario, Canada
| | - Rotrease Regan
- Division of Infectious Diseases, School of Medicine, Emory University, Atlanta, GA, USA
| | - Ting Sa
- Department of Biostatistics and Epidemiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Nanhua Zhang
- Department of Biostatistics and Epidemiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Rupert Kaul
- Department of Immunology, Faculty of Medicine, University of Toronto, Ontario, Canada
| | - LaRon E. Nelson
- School of Nursing, Yale University, Orange, CT, USA
- MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, Ontario, Canada
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Djiadeu P, Nguemo J, Mukandoli C, Odhiambo AJ, Lightfoot D, Mbuagbaw L, Nelson LE. Barriers to HIV care among Francophone African, Caribbean and Black immigrant people living with HIV in Canada: a protocol for a scoping systematic review. BMJ Open 2019; 9:e027440. [PMID: 30705245 PMCID: PMC6359737 DOI: 10.1136/bmjopen-2018-027440] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
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.
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Affiliation(s)
- Pascal Djiadeu
- Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St Michael Hospital, Toronto, Ontario, Canada
- School of Nursing, University of Rochester, Rochester, New York, USA
| | - Joseph Nguemo
- Daphne Cockwell School of Nursing, Ryerson University, Toronto, Ontario, Canada
| | | | - Apondi J Odhiambo
- Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St Michael Hospital, Toronto, Ontario, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - David Lightfoot
- Health Sciences Library, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Lawrence Mbuagbaw
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada
- Biostatistics Unit, Father Sean O’Sullivan Research Centre, St Joseph’s Healthcare, Hamilton, Ontario, Canada
- Centre for Development of Best Practices in Health (CDBPH), Yaoundé Central Hospital, Yaoundé, Cameroon
| | - LaRon E Nelson
- Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St Michael Hospital, Toronto, Ontario, Canada
- Yale School of Nursing, Yale University, New Haven, Connecticut, USA
- School of Nursing, University of Rochester, Rochester, New York, USA
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Pilecki B, Wulf-Johansson H, Støttrup C, Jørgensen PT, Djiadeu P, Nexøe AB, Schlosser A, Hansen SWK, Madsen J, Clark HW, Nielsen CH, Vestbo J, Palaniyar N, Holmskov U, Sorensen GL. Surfactant Protein D Deficiency Aggravates Cigarette Smoke-Induced Lung Inflammation by Upregulation of Ceramide Synthesis. Front Immunol 2018; 9:3013. [PMID: 30619359 PMCID: PMC6305334 DOI: 10.3389/fimmu.2018.03013] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 12/05/2018] [Indexed: 01/10/2023] Open
Abstract
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.
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Affiliation(s)
- Bartosz Pilecki
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Helle Wulf-Johansson
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Christian Støttrup
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Patricia Troest Jørgensen
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Pascal Djiadeu
- Translational Medicine, Lung Innate Immunity Research Laboratory, The Hospital for Sick Children Research Institute, Toronto, ON, Canada
| | - Anders Bathum Nexøe
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Anders Schlosser
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Søren Werner Karlskov Hansen
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Jens Madsen
- Department of Child Health, Sir Henry Wellcome Laboratories, Academic Unit for Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
- Institute for Life Sciences, University of Southampton, Southampton, United Kingdom
- National Institute for Health Research, Southampton Respiratory Biomedical Research Unit, Centre for Biomedical Research, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Howard William Clark
- Department of Child Health, Sir Henry Wellcome Laboratories, Academic Unit for Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
- Institute for Life Sciences, University of Southampton, Southampton, United Kingdom
- National Institute for Health Research, Southampton Respiratory Biomedical Research Unit, Centre for Biomedical Research, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Claus Henrik Nielsen
- Center for Rheumatology and Spine Diseases, Institute for Inflammation Research, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Jørgen Vestbo
- Department of Respiratory Medicine, Odense University Hospital, Odense, Denmark
- Division of Infection, Immunity and Respiratory Medicine, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, United Kingdom
| | - Nades Palaniyar
- Translational Medicine, Lung Innate Immunity Research Laboratory, The Hospital for Sick Children Research Institute, Toronto, ON, Canada
- Department of Laboratory Medicine and Pathobiology, and Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Uffe Holmskov
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Grith Lykke Sorensen
- Department of Cancer and Inflammation Research, Institute for Molecular Medicine, University of Southern Denmark, Odense, Denmark
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Djiadeu P, Farmakovski N, Azzouz D, Kotra LP, Sweezey N, Palaniyar N. Surfactant protein D regulates caspase-8-mediated cascade of the intrinsic pathway of apoptosis while promoting bleb formation. Mol Immunol 2017; 92:190-198. [PMID: 29107869 DOI: 10.1016/j.molimm.2017.10.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/17/2017] [Accepted: 10/17/2017] [Indexed: 01/10/2023]
Abstract
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.
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Affiliation(s)
- Pascal Djiadeu
- Lung Innate Immunity Research Laboratory, Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, 686 Bay St, Toronto, ON, M5G 0A4, Canada; Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, M5S 3M2, Canada
| | - Nicole Farmakovski
- Lung Innate Immunity Research Laboratory, Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, 686 Bay St, Toronto, ON, M5G 0A4, Canada
| | - Dhia Azzouz
- Lung Innate Immunity Research Laboratory, Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, 686 Bay St, Toronto, ON, M5G 0A4, Canada
| | - Lakshmi P Kotra
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, M5S 3M2, Canada; Center for Molecular Design and Preformulations, Toronto General Research Institute, University Health Network, 101 College Street, Toronto, Ontario, M5G 1L7, Canada
| | - Neil Sweezey
- Lung Innate Immunity Research Laboratory, Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, 686 Bay St, Toronto, ON, M5G 0A4, Canada; Departments of Paediatrics, Physiology and Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, M5G 1X8, Canada
| | - Nades Palaniyar
- Lung Innate Immunity Research Laboratory, Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, 686 Bay St, Toronto, ON, M5G 0A4, Canada; Departments of Laboratory Medicine and Pathobiology and Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, M5S 1A8, Canada.
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Djiadeu P, Azzouz D, Khan MA, Kotra LP, Sweezey N, Palaniyar N. Ultraviolet irradiation increases green fluorescence of dihydrorhodamine (DHR) 123: false-positive results for reactive oxygen species generation. Pharmacol Res Perspect 2017; 5:e00303. [PMID: 28357129 PMCID: PMC5368967 DOI: 10.1002/prp2.303] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 12/31/2016] [Accepted: 02/05/2017] [Indexed: 01/15/2023] Open
Abstract
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.
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Affiliation(s)
- Pascal Djiadeu
- Innate Immunity Research Laboratory Physiology and Experimental Medicine Peter Gilgan Centre for Research and Learning The Hospital for Sick Children 686 Bay St Toronto Ontario Canada M5G 0A4; Department of Pharmaceutical Sciences Leslie Dan Faculty of Pharmacy University of Toronto Toronto Ontario Canada M5S 3M2
| | - Dhia Azzouz
- Innate Immunity Research Laboratory Physiology and Experimental Medicine Peter Gilgan Centre for Research and Learning The Hospital for Sick Children 686 Bay St Toronto Ontario Canada M5G 0A4; Department of Laboratory Medicine and Pathobiology University of Toronto Toronto Ontario Canada M5G 1X8
| | - Meraj A Khan
- Innate Immunity Research Laboratory Physiology and Experimental Medicine Peter Gilgan Centre for Research and Learning The Hospital for Sick Children 686 Bay St Toronto Ontario Canada M5G 0A4
| | - Lakshmi P Kotra
- Department of Pharmaceutical Sciences Leslie Dan Faculty of Pharmacy University of Toronto Toronto Ontario Canada M5S 3M2
| | - Neil Sweezey
- Innate Immunity Research Laboratory Physiology and Experimental Medicine Peter Gilgan Centre for Research and Learning The Hospital for Sick Children 686 Bay St Toronto Ontario Canada M5G 0A4; Department of Physiology University of Toronto Toronto Ontario Canada M5G 1X8; Department of Pediatrics University of Toronto Toronto Ontario Canada M5G 1X8
| | - Nades Palaniyar
- Innate Immunity Research Laboratory Physiology and Experimental Medicine Peter Gilgan Centre for Research and Learning The Hospital for Sick Children 686 Bay St Toronto Ontario Canada M5G 0A4; Department of Laboratory Medicine and Pathobiology University of Toronto Toronto Ontario Canada M5G 1X8; Institute of Medical Sciences Faculty of Medicine University of Toronto Toronto Ontario Canada M5G 1X8
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Ghorbani P, Santhakumar P, Hu Q, Djiadeu P, Wolever TM, Palaniyar N, Grasemann H. Short-chain fatty acids affect cystic fibrosis airway inflammation and bacterial growth. Eur Respir J 2015; 46:1033-45. [DOI: 10.1183/09031936.00143614] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 03/30/2015] [Indexed: 11/05/2022]
Abstract
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.
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