Genetically predicted circulating levels of cytokines and the risk of depression: a bidirectional Mendelian-randomization study

Objective: Inflammatory cytokines disturbance is the main result of immune dysregulation, which is widely described in major depressive disorder (MDD). However, the potential causal relationship between these two factors has not been discovered. Therefore, the purpose of this study was to investigat...

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Main Authors: Meiti Wang, Guixiang Jin, Ying Cheng, Shi-Yang Guan, Jinxin Zheng, Shun-Xian Zhang
Format: Article
Language:English
Published: Frontiers Media S.A. 2023-08-01
Series:Frontiers in Genetics
Subjects:
Online Access:https://www.frontiersin.org/articles/10.3389/fgene.2023.1242614/full
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author Meiti Wang
Guixiang Jin
Ying Cheng
Shi-Yang Guan
Jinxin Zheng
Shun-Xian Zhang
author_facet Meiti Wang
Guixiang Jin
Ying Cheng
Shi-Yang Guan
Jinxin Zheng
Shun-Xian Zhang
author_sort Meiti Wang
collection DOAJ
description Objective: Inflammatory cytokines disturbance is the main result of immune dysregulation, which is widely described in major depressive disorder (MDD). However, the potential causal relationship between these two factors has not been discovered. Therefore, the purpose of this study was to investigate the causal relationship between inflammatory cytokines and MDD risk by using the two-sample Mendelian randomization (MR) analysis.Method: Two genetic instruments obtained from publicly available gene profile data were utilized for the analysis. We obtained the genetic variation data of 41 inflammatory cytokines from genome-wide association studies (GWAS) meta-analysis of 8293 individuals of Finnish descent. The MDD data, including 135,458 MDD cases and 344,901 controls, were obtained from the Psychiatric Genomics Consortium Database. For the Mendelian randomization (MR) estimation, several methods were employed, namely, MR-Egger regression, inverse-variance weighted (IVW), weighted median, and MR-Pleiotropy RESidual Sum and Outlier (MR-PRESSO) methods.Result: A causal relationship was identified between the genetically proxied levels of Interleukin (IL) −18, IL-1β, and Regulated upon activation normal T cell expressed and secreted (RANTES) and the risk of MDD (OR = 0.968, 95%CI = 0.938, 0.998, p = 0.036; OR = 0.875, 95%CI = 0.787, 0.971, p = 0.012; OR = 0.947, 95%CI = 0.902, 0.995, p = 0.03; respectively). However, our Mendelian randomization (MR) estimates provided no causality of MDD on inflammatory cytokines.Conclusion: Our study elucidates the connection between inflammatory cytokines and MDD by using MR analysis, thereby enhancing our comprehension of the potential mechanisms. By identifying these associations, our findings hold substantial implications for the development of more effective treatments aimed at improving patient outcomes. However, further investigation is required to fully comprehend the exact biological mechanisms involved.
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spelling doaj.art-c408fc4a622a4ac4b72f91d11679313d2023-08-04T12:09:08ZengFrontiers Media S.A.Frontiers in Genetics1664-80212023-08-011410.3389/fgene.2023.12426141242614Genetically predicted circulating levels of cytokines and the risk of depression: a bidirectional Mendelian-randomization studyMeiti Wang0Guixiang Jin1Ying Cheng2Shi-Yang Guan3Jinxin Zheng4Shun-Xian Zhang5Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, ChinaShanghai Yangpu Mental Health Center, Shanghai, ChinaShanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, ChinaSecond Affiliated Hospital of Anhui Medical University, Hefei, Anhui, ChinaSchool of Global Health, Chinese Center for Tropical Diseases Research—Shanghai Jiao Tong University School of Medicine, Shanghai, ChinaClinical Research Center, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, ChinaObjective: Inflammatory cytokines disturbance is the main result of immune dysregulation, which is widely described in major depressive disorder (MDD). However, the potential causal relationship between these two factors has not been discovered. Therefore, the purpose of this study was to investigate the causal relationship between inflammatory cytokines and MDD risk by using the two-sample Mendelian randomization (MR) analysis.Method: Two genetic instruments obtained from publicly available gene profile data were utilized for the analysis. We obtained the genetic variation data of 41 inflammatory cytokines from genome-wide association studies (GWAS) meta-analysis of 8293 individuals of Finnish descent. The MDD data, including 135,458 MDD cases and 344,901 controls, were obtained from the Psychiatric Genomics Consortium Database. For the Mendelian randomization (MR) estimation, several methods were employed, namely, MR-Egger regression, inverse-variance weighted (IVW), weighted median, and MR-Pleiotropy RESidual Sum and Outlier (MR-PRESSO) methods.Result: A causal relationship was identified between the genetically proxied levels of Interleukin (IL) −18, IL-1β, and Regulated upon activation normal T cell expressed and secreted (RANTES) and the risk of MDD (OR = 0.968, 95%CI = 0.938, 0.998, p = 0.036; OR = 0.875, 95%CI = 0.787, 0.971, p = 0.012; OR = 0.947, 95%CI = 0.902, 0.995, p = 0.03; respectively). However, our Mendelian randomization (MR) estimates provided no causality of MDD on inflammatory cytokines.Conclusion: Our study elucidates the connection between inflammatory cytokines and MDD by using MR analysis, thereby enhancing our comprehension of the potential mechanisms. By identifying these associations, our findings hold substantial implications for the development of more effective treatments aimed at improving patient outcomes. However, further investigation is required to fully comprehend the exact biological mechanisms involved.https://www.frontiersin.org/articles/10.3389/fgene.2023.1242614/fullmajor depressive disorderinflammatory cytokineMendelian randomizationGWASIL-18RANTES
spellingShingle Meiti Wang
Guixiang Jin
Ying Cheng
Shi-Yang Guan
Jinxin Zheng
Shun-Xian Zhang
Genetically predicted circulating levels of cytokines and the risk of depression: a bidirectional Mendelian-randomization study
Frontiers in Genetics
major depressive disorder
inflammatory cytokine
Mendelian randomization
GWAS
IL-18
RANTES
title Genetically predicted circulating levels of cytokines and the risk of depression: a bidirectional Mendelian-randomization study
title_full Genetically predicted circulating levels of cytokines and the risk of depression: a bidirectional Mendelian-randomization study
title_fullStr Genetically predicted circulating levels of cytokines and the risk of depression: a bidirectional Mendelian-randomization study
title_full_unstemmed Genetically predicted circulating levels of cytokines and the risk of depression: a bidirectional Mendelian-randomization study
title_short Genetically predicted circulating levels of cytokines and the risk of depression: a bidirectional Mendelian-randomization study
title_sort genetically predicted circulating levels of cytokines and the risk of depression a bidirectional mendelian randomization study
topic major depressive disorder
inflammatory cytokine
Mendelian randomization
GWAS
IL-18
RANTES
url https://www.frontiersin.org/articles/10.3389/fgene.2023.1242614/full
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