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Coleman TA, Chee K, Chin-See R, Salama R, Sajan M, Narbonne M, Travers R, Coulombe S. Minority Stressors, Social Provisions, and Past-Year Suicidal Ideation and Suicide Attempts in a Sample of Sexual Orientation and Gender Identity/Expression Minority People in Canada. LGBT Health 2024. [PMID: 38557210 DOI: 10.1089/lgbt.2022.0344] [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] [Indexed: 04/04/2024] Open
Abstract
Purpose: Mental health disparities in sexual orientation and/or gender identity and/or expression (SOGIE) minority groups are well-documented, with research consistently showing higher levels of suicidality, even in Canada, considered one of the world's most accepting countries of SOGIE minority groups. Adverse outcomes in these groups are often framed using minority stress theory, with social support frequently studied as an integral buffer to these outcomes. This analysis explores facets of minority stress and social support associated with past-year suicidal ideation and suicide attempts. Methods: A cross-sectional internet survey of SOGIE diverse people in Canada (n = 1542) was conducted. Binary logistic regression calculated bivariate and multivariate factors associated with past-year suicidal ideation and suicide attempts. Backward elimination (retaining sociodemographic factors and self-rated mental health) identified salient minority stress and social support (provisions) factors. Results: Over half (56.72%) of participants had ever thought of dying by suicide, with 24.84% having attempted suicide. During the past year, 26.80% had thought of dying by suicide, with 5.32% having attempted suicide. Victimization events, and guidance (e.g., someone to talk to about important decisions) and attachment (e.g., close relationships providing emotional security) social provision subscales remained salient after backward elimination procedures. Conclusion: Our findings emphasize that a fulsome, multilevel approach considering structural, community, and individual strategies to address overt discrimination, integrating social connections and guidance, is necessary to prevent dying by suicide.
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Affiliation(s)
- Todd A Coleman
- Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Kenny Chee
- Department of Psychology, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Robert Chin-See
- Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Ramez Salama
- Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Maria Sajan
- Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Macie Narbonne
- Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Robb Travers
- Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario, Canada
| | - Simon Coulombe
- Département des relations industrielles, Université Laval, Québec, Québec, Canada
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Kulkarni AP, Sajan M. Lipoxygenase-another pathway for glutathione conjugation of xenobiotics: A study with human term placental lipoxygenase and ethacrynic acid. Arch Biochem Biophys 1999; 371:220-7. [PMID: 10545208 DOI: 10.1006/abbi.1999.1439] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this study, we examined the ability of human term placental lipoxygenase (HTPLO) to catalyze glutathione (GSH) conjugate formation from ethacrynic acid (EA) in the presence of linoleic acid (LA) and GSH. HTPLO purified by affinity chromatography was used in all the experiments. The results indicate that the process of EA-SG is enzymatic in nature. The reaction shows dependence on pH, the enzyme, and the concentration of GSH, LA, and EA. The optimal assay conditions to observe a maximal rate of EA-SG formation required the presence of 0.3 mM LA, 0.2 mM EA, 2.0 mM GSH, and approximately 300 microg HTPLO in the reaction medium buffered at pH 9.0. Under the experimental conditions employed, the reaction exhibited K(m) values of 1.1 mM, 200 microM, and 130 microM for GSH, LA, and EA, respectively. The estimated specific activity of HTPLO-catalyzed EA-GS formation was approximately 4.4 +/- 0.4 micromol/min/mg protein. This rate is more than twofold greater than the rate noted for the reaction mediated by the purified human term placental glutathione transferase. Under physiologically relevant conditions (20 microM LA, 2.0 mM GSH, at pH 7.4), HTPLO produced EA-SG at 56% of the maximal rate noted under optimal assay conditions. Nordihydroguaiaretic acid, the classical inhibitor of different lipoxygenases, significantly blocked the reaction. It is proposed that free radicals are involved in the process of EA-SG formation by HTPLO. The evidence gathered in this in vitro study suggests for the first time that lipoxygenase present in the human term placenta is capable of EA-SG formation.
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Affiliation(s)
- A P Kulkarni
- Department of Environmental and Occupational Health, University of South Florida, Tampa, Florida 33612-3805, USA.
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Yen A, Williams M, Platko JD, Der C, Hisaka M, Feigin AM, Wang C, Stiles CD, Cavalcanti TC, Guimaraesr F, Gumerato HF, Tahinc QS, Ratnan AV, Su HJ, Bxrle DD, Basson MD, Hong F, Bianchi-Santamaria A, Santamaria L, Bianchi-Santamaria A, Fedeli S, Santamaria L, Coral A, Lamartiniere P, Pence BC, Butler MJ, Dunn DM, Miller MF, Wickramasinghe NSMD, Jo H, McDonald JM, Hardy RW, Fernandes G, Chandrasekar B, Venkatraman JT, Kuratko CN, Pence BC, Bhatia M, Kirkland JB, Meckling-Gill KA, Sarkar NH, Li H, Zhao W, Atkinson TG, Martin D, de Salis H, Meckling-Gill KA, Teixeira C, Pratt C, Kulkarni AA, Sajan M, Datta K, Roy P, Kulkarni AP, Gopalakrishna R, Chen ZH, Gundimeda U, Braunhut SJ, Medeiros D, Freeman MR, Moses MA, Yang GY, Shamsuddin AM, Vucenik I, Yang GY, Shamsuddin AM, Paisley EA, Kaput J, Mangian HJ, Visek WJ, Hohl RJ, Lewis K, Chung KT, Chen W, Zhou Y, Fu PP, Hart RW, Chou MW, Kagan VE, Yalowich JC, Tyurina JY, Tyurin VA, Ritov VB, Goldman R, Stoyanovsky DA, Menshikova EV, Kagan VE, Zugmaier G, Jäger R, Gottardis M, Havemann K, Knabbe C, Hagerman RA, Fischer SM, Locniskar MF, Black HS, Okotie-Eboh G, Gerguis J, Urban JI, Thornby JI, Merrill H, Sauer LA, Dauchy RT, Connolly JM, Rose DP, Gensler HL, Gerrish K, Peng YM, Xu MJ, Jenski LJ, Zerouga M, Zhang L, Stillwell W, Homayoun P, Gupta MK, Lente F, Tuason U, Budd T, Yazlovitskaya M, Melnykovych G, Matthew JA, Middleton S, Prior A, Kennedy HJ, Fellows IW, Johnson IT, Lee PP, Ip MM, Gercel-Taylor C, Taylor DD, Pretlow TP, Hudson L, O’Riordan MA, Pretlow TG, Cohen LA, Zang E, Rivenson A, Sherman AR, Hrabinski D, Berger V, Dees C, Henley D, Ardies M, Travis C, Benbrook DM, Brewer K, Heldermon C, Nunez E, Walisewaki P, Reynolds CP, Einhorn P, Schindler P, Zuo JJ, Khan AA, Avramis VI, Villablanca JG, Gaposchkin DP, Broitman SA, Kosacoisky SC, Broitman SA, Shlyankevich M, Lee R, Garden K, Lee YC, Surh YJ, Katdare MS, Osborne MP, Telang NT, Shivapurkar N, Tang Z, Alabaster O, Jaskeiwicz JA, Zhao Y, Shimomura Y, Crabb DW, Harris RA, Zaleski J, Richter PA, Kwei GY, Kauffman FC, Hilakivi-Clarke L, Onojafe I, Cho E, Clarke R, Lippman ME. Abstracts. Advances in Experimental Medicine and Biology 1995. [DOI: 10.1007/978-1-4899-0949-7_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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