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Wang Y, Guo R, Piedras BI, Tang HY, Asara JM, Tempera I, Lieberman PM, Gewurz BE. The CTLH Ubiquitin Ligase Substrates ZMYND19 and MKLN1 Negatively Regulate mTORC1 at the Lysosomal Membrane. RESEARCH SQUARE 2024:rs.3.rs-4259395. [PMID: 38746323 PMCID: PMC11092817 DOI: 10.21203/rs.3.rs-4259395/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Most Epstein-Barr virus-associated gastric carcinoma (EBVaGC) harbor non-silent mutations that activate phosphoinositide 3 kinase (PI3K) to drive downstream metabolic signaling. To gain insights into PI3K/mTOR pathway dysregulation in this context, we performed a human genome-wide CRISPR/Cas9 screen for hits that synergistically blocked EBVaGC proliferation together with the PI3K antagonist alpelisib. Multiple subunits of carboxy terminal to LisH (CTLH) E3 ligase, including the catalytic MAEA subunit, were among top screen hits. CTLH negatively regulates gluconeogenesis in yeast, but not in higher organisms. Instead, we identified that the CTLH substrates MKLN1 and ZMYND19, which highly accumulated upon MAEA knockout, associated with one another and with lysosomes to inhibit mTORC1. ZMYND19/MKLN1 bound Raptor and RagA/C, but rather than perturbing mTORC1 lysosomal recruitment, instead blocked a late stage of its activation, independently of the tuberous sclerosis complex. Thus, CTLH enables cells to rapidly tune mTORC1 activity at the lysosomal membrane via the ubiquitin/proteasome pathway.
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Affiliation(s)
- Yin Wang
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, MA 02115, USA; Department of Microbiology, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Rui Guo
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, MA 02115, USA; Department of Microbiology, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | - Brenda Iturbide Piedras
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, MA 02115, USA; Department of Microbiology, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA
| | | | - John M Asara
- Division of Signal Transduction, Beth Israel Deaconess Medical Center and Department of Medicine, Harvard Medical School, Boston, MA, USA
| | | | | | - Benjamin E Gewurz
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, MA 02115, USA; Department of Microbiology, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA; Program in Virology, Harvard Medical School
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Gunarathne L, Apputhurai P, Nedeljkovic M, Bhowmik J. Factors associated with married women's attitude toward intimate partner violence: A study on 20 low-and middle-income countries. Health Care Women Int 2024:1-21. [PMID: 38394302 DOI: 10.1080/07399332.2024.2319214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 02/10/2024] [Indexed: 02/25/2024]
Abstract
Intimate Partner Violence (IPV) is a global problem and has been reported to be significantly higher for women in Low and Middle-Income Countries (LMICs). The researchers analyzed Demographic and Health Survey (DHS) data of married women in 20 LMICs to examine those most vulnerable to accepting IPV by investigating associated risk factors. The researchers revealed a higher level of acceptance of IPV among illiterate women from poorer households in remote areas. Using these findings, the authors provide insight into ensuring and enhancing the living standards of these vulnerable women by making education more readily accessible.
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Affiliation(s)
- Lakma Gunarathne
- Department of Health Sciences and Biostatistics, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Pragalathan Apputhurai
- Department of Health Sciences and Biostatistics, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Maja Nedeljkovic
- Department of Psychological Sciences, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Jahar Bhowmik
- Department of Health Sciences and Biostatistics, Swinburne University of Technology, Hawthorn, Victoria, Australia
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Logie CH, Loutet MG, Okumu M, Coelho M, Lukone SO, Kisubi N, Latif M, McAlpine A, Kyambadde P. Exploring a syndemic of poverty, cumulative violence, and HIV vulnerability among refugee youth: multi-method insights from a humanitarian setting in Uganda. AIDS Care 2024; 36:36-43. [PMID: 37921837 DOI: 10.1080/09540121.2023.2277151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 10/23/2023] [Indexed: 11/04/2023]
Abstract
Synergistic associations between social inequities and HIV vulnerabilities - known as a syndemic - are understudied with youth in humanitarian settings. We explored refugee youths' HIV prevention needs in Bidi Bidi Refugee Settlement, Uganda. This multi-methods study involved 6 focus groups and 12 in-depth individual interviews (IDI) with refugee youth (n = 60) aged 16-24, and IDI with refugee elders (n = 8) and healthcare providers (n = 8). We then conducted cross-sectional surveys with refugee youth (16-24 years) (n = 115) to assess: poverty, recent sexual and gender-based violence (SGBV), and condom engagement motivation (CEM) (wanting to learn about condoms for HIV prevention). Multivariable logistic regression was used to estimate adjusted odds ratios for associations between poverty and SGBV with CEM. Qualitative narratives revealed poverty and trauma elevated substance use, and these converged to exacerbate SGBV. SGBV and transactional sex increased HIV vulnerabilities. Among survey participants, poverty and recent SGBV were associated with reduced odds of CEM. The interaction between poverty and recent SGBV was significant: the predicted probability of CEM among youth who experienced both poverty and SGBV was almost half than among youth who experienced poverty alone, SGBV alone, or neither. Findings signal the confluence of poverty, violence, and substance use elevate refugee youth HIV vulnerabilities.
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Affiliation(s)
- Carmen H Logie
- Factor-Inwentash Faculty of Social Work, University of Toronto, Toronto, Canada
- United Nations University Institute for Water, Environment, and Health, Hamilton, Canada
- Centre for Gender & Sexual Health Equity, Vancouver, Canada
- Women's College Research Institute, Women's College Hospital, Toronto, Canada
| | - Miranda G Loutet
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Moses Okumu
- School of Social Work, University of Illinois at Urbana Champaign, Urbana, IL, USA
| | | | | | - Nelson Kisubi
- Uganda Refugee and Disaster Management Council, Yumbe, Uganda
| | - Maya Latif
- Factor-Inwentash Faculty of Social Work, University of Toronto, Toronto, Canada
| | - Alyssa McAlpine
- Factor-Inwentash Faculty of Social Work, University of Toronto, Toronto, Canada
| | - Peter Kyambadde
- National AIDS Coordinating Program, Ugandan Ministry of Health, Kampala, Uganda
- Most at Risk Population Initiative (MARPI), Kampala, Uganda
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Gunarathne L, Bhowmik J, Apputhurai P, Nedeljkovic M. Factors and consequences associated with intimate partner violence against women in low- and middle-income countries: A systematic review. PLoS One 2023; 18:e0293295. [PMID: 37939106 PMCID: PMC10631698 DOI: 10.1371/journal.pone.0293295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 10/09/2023] [Indexed: 11/10/2023] Open
Abstract
Intimate Partner Violence (IPV) is a global public health issue, with notably high prevalence rates observed within Low-and Middle-Income Countries (LMICs). This systematic review aimed to examine the risk factors and consequences associated with IPV against women in LMICs. Following PRISMA guidelines, we conducted a systematic review using three databases: Web of Science, ProQuest Central, and Scopus, covering the period from January 2010 to January 2022. The study included only peer-reviewed journal articles in English that investigated IPV against women in LMICs. Out of 167 articles screened, 30 met the inclusion criteria, comprising both quantitative and mixed-method studies. Risk factors of IPV were categorised as: demographic risk factors (23 studies), family risk factors (9 studies), community-level factors (1 studies), and behavioural risk factors (14 studies), while consequences of IPV were categorised as mental health impacts (13 studies), physical impacts (5 studies), and societal impacts (4 studies). In this study, several risk factors were identified including lower levels of education, marriage at a young age, poor wealth indices, rural residential areas, and acceptance of gender norms that contribute to the prevalence of IPV in LMICs. It is essential to address these factors through effective preventive policies and programs. Moreover, this review highlights the necessity of large-scale, high-quality policy-driven research to further examine risk factors and consequences, ultimately guiding the development of interventions aimed at preventing IPV against women in LMICs.
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Affiliation(s)
- Lakma Gunarathne
- Department of Health Science and Biostatistics, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Jahar Bhowmik
- Department of Health Science and Biostatistics, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Pragalathan Apputhurai
- Department of Health Science and Biostatistics, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Maja Nedeljkovic
- Department of Psychological Sciences, Swinburne University of Technology, Hawthorn, Victoria, Australia
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Vasylyev M, Skrzat-Klapaczyńska A, Bernardino JI, Săndulescu O, Gilles C, Libois A, Curran A, Spinner CD, Rowley D, Bickel M, Aichelburg MC, Nozza S, Wensing A, Barber TJ, Waters L, Jordans C, Bramer W, Lakatos B, Tovba L, Koval T, Kyrychenko T, Dumchev K, Buhiichyk V, Smyrnov P, Antoniak S, Antoniak S, Vasylyeva TI, Mazhnaya A, Kowalska J, Bhagani S, Rokx C. Unified European support framework to sustain the HIV cascade of care for people living with HIV including in displaced populations of war-struck Ukraine. THE LANCET HIV 2022; 9:e438-e448. [DOI: 10.1016/s2352-3018(22)00125-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/08/2022] [Accepted: 04/11/2022] [Indexed: 12/24/2022]
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Powell W. Commentary on the special issue on disproportionate exposure to trauma: Disrupting single stories, broadening the aperture, and embracing the trauma socioexposome in research with minoritized individuals. J Trauma Stress 2021; 34:1056-1060. [PMID: 34647361 DOI: 10.1002/jts.22747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 09/17/2021] [Indexed: 11/06/2022]
Abstract
The theory-driven studies in this special issue of the Journal of Traumatic Stress illustrate the opportunities and inherent methodological complexities that arise in traumatic stress studies when scholars consider the unique social-ecological contexts and exposure histories of minoritized individuals. Moreover, the included articles challenge the field's paradigmatic preoccupation with maladaptive individual trauma responses and invite researchers to shift their attention to the role played by a range of environmental adversities. This commentary is organized around three key recommendations regarding what is needed to enhance future research and treatment among trauma-exposed minoritized populations: (a) disrupt single scientific stories about trauma risk, detection, protection, and resilience; (b) embrace the complexity of the trauma socioexposome; and (c) expand capacity to assess, research, and mitigate syndemic risk. The present commentary describes how these key points are highlighted and underscored in the articles in this special issue, arriving at the conclusion that, more than ever, scholars and clinicians need lenses and methods that can help in assessing and treating the whole person and community from a biopsychosocial perspective when racism contibutes to a complex trauma socioexposome rather than perpetuating scientific and clinical models based only on single stories of isolated individuals confronted by discrete traumatic events.
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Affiliation(s)
- Wizdom Powell
- University of Connecticut, Health Disparities Institute, Farmington, Connecticut, USA
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Allwood MA, Ford JD, Levendosky A. Introduction to the Special Issue: Disproportionate trauma, stress, and adversities as a pathway to health disparities among disenfranchised groups globally. J Trauma Stress 2021; 34:899-904. [PMID: 34644429 DOI: 10.1002/jts.22743] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 09/08/2021] [Indexed: 11/09/2022]
Abstract
Globally, individuals and communities that are marginalized based on their identities are at heightened risk for exposure to traumatic stress and socioeconomic hardship. Marginalization and disproportionate risk for many types of adversities correspond with disparities in physical health, mental health, and overall well-being. Together, the 12 empirical studies, one systematic review, and commentary in this special issue of the Journal of Traumatic Stress highlight the impact of discrimination and disproportionate adversity among groups marginalized based on race, ethnicity, nativity, caste, gender identity, sexual orientation, economic status, and medical status. Although most studies in this issue focus on the United States, the articles that focus on disparities and risk factors in India, El Salvador, Uganda, and Burundi provides a multicontinent global perspective. The global perspective, including the impact of the global pandemic, invites further examination of how disproportionate exposure to traumatic stress and adversity are associated with inequitable burden and health disparities worldwide. This special issue further highlights the developmental and multigenerational burden of systemic marginalization by including studies of children, young adults, adults, and parent-child dyads. Pathways for change and intervention are illustrated through a liberatory consciousness perspective, with one study utilizing liberatory media skills (e.g., positive media images and messages) to mitigate the adverse effects of trauma exposure on at-risk young adults of color. Worldwide, research on the effects of trauma, stress, and adversities must examine contextual factors (e.g., economic hardship), marginalization (e.g., discrimination, identity factors), and the differential impact on health among individuals and communities.
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Affiliation(s)
- Maureen A Allwood
- Department of Psychology, John Jay College of Criminal Justice, City University of New York, New York, New York, USA
| | - Julian D Ford
- Department of Psychiatry, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Alytia Levendosky
- Department of Psychology, Michigan State University, East Lansing, Michigan, USA
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Seedat S. Commentary on the special issue on disproportionate exposure to trauma: Trauma, stress, and adversities and health disparities among disenfranchised groups globally during the COVID pandemic. J Trauma Stress 2021; 34:1061-1067. [PMID: 34642999 PMCID: PMC8662206 DOI: 10.1002/jts.22746] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 09/14/2021] [Indexed: 11/11/2022]
Abstract
The papers in this Journal of Traumatic Stress special issue on disproportionate adversity cover the gamut of discrimination traumas and stressors, including microaggressions, a more insidious forms of discrimination, and their often-devastating and wide-ranging mental health sequelae, in disproportionately affected disenfranchised groups. Discrimination based on race, ethnicity, gender, and sexual orientation commonly confers cumulative and chronic effects. In the field of traumatic stress studies, several types of identity-linked traumatic events have been identified and empirically investigated as posttraumatic stress disorder (PTSD)-producing experiences. Collectively, the 13 papers included in this special issue raise questions about the definition, conceptualization, and categorization of various forms of explicit and implicit identity-linked trauma. These papers highlight the need for acceptance of a shared nomenclature and better differentiation of both causal and correlational associations with acute and chronic PTSD, depression, suicide risk, alcohol misuse, and other mental health outcomes. In this commentary, the discussion is extended to COVID-19, a disease that has been globally devastating for many. On multiple levels (i.e., physical, mental, emotional, economic, and social), COVID-19 has magnified the prepandemic fault lines of race, ethnicity, gender, gender identity, and sexual orientation. Applying a syndemic framework to the health impact of COVID-19 and, arguably, the most pervasive identity linked epidemic worldwide-systemic racism-brings perspective to the biological and social forces that are likely to be driving the convergence of COVID-19, systemic racism, and chronic health inequities, and may be informative in guiding evidence-based strategies for managing racial trauma in the context of COVID-19.
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Affiliation(s)
- Soraya Seedat
- Department of PsychiatryFaculty of Medicine and Health SciencesStellenbosch UniversityCape TownSouth Africa
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