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Qin L, Lin H, Zhang G, Wang J, Feng T, Lei Y, Xie Y, Xu T, Zhang X. Screening and validation of differentially expressed genes in polymyositis. Heliyon 2024; 10:e24537. [PMID: 38317877 PMCID: PMC10839795 DOI: 10.1016/j.heliyon.2024.e24537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 01/10/2024] [Accepted: 01/10/2024] [Indexed: 02/07/2024] Open
Abstract
Background Polymyositis (PM), a prevalent inflammatory myopathy, currently lacks defined pathogenic mechanism. To illuminate its pathogenesis, we integrated bioinformatics and clinical specimens to examine potential aberrant gene expression patterns and their localization. Methods We obtained GSE128470 and GSE3112 dataset from the Gene Expression Omnibus, performed Gene Set Enrichment Analysis (GSEA) and immune infiltration analysis using CiberSort, identified differentially expressed genes with Limma, conducted functional annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis, constructed a Protein-Protein Interaction network, and identified hub genes using Cytoscape. ROC analysis evaluated hub gene diagnostic accuracy for PM, validated their expression levels with clinical specimens. Results DEG analysis revealed 51 upregulated and 779 downregulated genes. Gene Ontology (GO) analysis implicated Type I interferon (IFN-Ⅰ) signaling, while KEGG pointed to cell adhesion molecule activation and oxidative phosphorylation inhibition. Protein-Protein Interaction (PPI) analysis identified 8 diagnosffftic hub genes. Clinical samples confirmed their upregulation in PM, especially IRF1 and IRF9 between muscle fibers. Different immune cell infiltrations were observed in PM patients versus controls. Conclusions Our study explores potential pathogenic factors, diagnostic markers, and immune cells in PM, with a focus on verifying IRF1 and IRF9 upregulation in the IFN-I signaling pathway. These findings bear significance for PM diagnosis and treatment.
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Affiliation(s)
- Linmang Qin
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Haobo Lin
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Guangfeng Zhang
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Jieying Wang
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Tianxiao Feng
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Yunxia Lei
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Yuesheng Xie
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Ting Xu
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Xiao Zhang
- Department of Rheumatology and Immunology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
- The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
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Lombardi L, Le Clerc S, Wu CL, Bouassida J, Boukouaci W, Sugusabesan S, Richard JR, Lajnef M, Tison M, Le Corvoisier P, Barau C, Banaschewski T, Holt R, Durston S, Persico AM, Oakley B, Loth E, Buitelaar J, Murphy D, Leboyer M, Zagury JF, Tamouza R. A human leukocyte antigen imputation study uncovers possible genetic interplay between gut inflammatory processes and autism spectrum disorders. Transl Psychiatry 2023; 13:244. [PMID: 37407551 DOI: 10.1038/s41398-023-02550-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/24/2023] [Accepted: 06/27/2023] [Indexed: 07/07/2023] Open
Abstract
Autism spectrum disorders (ASD) are neurodevelopmental conditions that are for subsets of individuals, underpinned by dysregulated immune processes, including inflammation, autoimmunity, and dysbiosis. Consequently, the major histocompatibility complex (MHC)-hosted human leukocyte antigen (HLA) has been implicated in ASD risk, although seldom investigated. By utilizing a GWAS performed by the EU-AIMS consortium (LEAP cohort), we compared HLA and MHC genetic variants, single nucleotide polymorphisms (SNP), and haplotypes in ASD individuals, versus typically developing controls. We uncovered six SNPs, namely rs9268528, rs9268542, rs9268556, rs14004, rs9268557, and rs8084 that crossed the Bonferroni threshold, which form the underpinnings of 3 independent genetic pathways/blocks that differentially associate with ASD. Block 1 (rs9268528-G, rs9268542-G, rs9268556-C, and rs14004-A) afforded protection against ASD development, whilst the two remaining blocks, namely rs9268557-T, and rs8084-A, associated with heightened risk. rs8084 and rs14004 mapped to the HLA-DRA gene, whilst the four other SNPs located in the BTNL2 locus. Different combinations amongst BTNL2 SNPs and HLA amino acid variants or classical alleles were found either to afford protection from or contribute to ASD risk, indicating a genetic interplay between BTNL2 and HLA. Interestingly, the detected variants had transcriptional and/or quantitative traits loci implications. As BTNL2 modulates gastrointestinal homeostasis and the identified HLA alleles regulate the gastrointestinal tract in celiac disease, it is proposed that the data on ASD risk may be linked to genetically regulated gut inflammatory processes. These findings might have implications for the prevention and treatment of ASD, via the targeting of gut-related processes.
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Affiliation(s)
- Laura Lombardi
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
- Laboratoire Génomique, Bio-informatique et Chimie Moléculaire (EA7528), Conservatoire National des Arts et Métiers, 292, rue Saint Martin, 75003, Paris, France
- HESAM Université, Paris, France
| | - Sigrid Le Clerc
- Laboratoire Génomique, Bio-informatique et Chimie Moléculaire (EA7528), Conservatoire National des Arts et Métiers, 292, rue Saint Martin, 75003, Paris, France
- HESAM Université, Paris, France
| | - Ching-Lien Wu
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
| | - Jihène Bouassida
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
| | - Wahid Boukouaci
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
| | - Sobika Sugusabesan
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
| | - Jean-Romain Richard
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
| | - Mohamed Lajnef
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
| | - Maxime Tison
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
- Laboratoire Génomique, Bio-informatique et Chimie Moléculaire (EA7528), Conservatoire National des Arts et Métiers, 292, rue Saint Martin, 75003, Paris, France
- HESAM Université, Paris, France
| | - Philippe Le Corvoisier
- Université Paris Est Créteil, Inserm, Centre Investigation Clinique, CIC 1430, Henri Mondor, Créteil, F94010, France
| | - Caroline Barau
- Plateforme de Ressources Biologiques, HU Henri Mondor, Créteil, F94010, France
| | - Tobias Banaschewski
- Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Rosemary Holt
- Autism Research Centre, Department of Psychiatry, University of Cambridge, Cambridge, UK
| | - Sarah Durston
- Education Center, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Antonio M Persico
- Child and Adolescent Neuropsychiatry Program at Modena University Hospital, & Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Bethany Oakley
- Department of Forensic and Neurodevelopemental Science, Institute of Psychatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Eva Loth
- Department of Forensic and Neurodevelopemental Science, Institute of Psychatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Jan Buitelaar
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - Declan Murphy
- Department of Forensic and Neurodevelopemental Science, Institute of Psychatry, Psychology and Neuroscience, King's College London, London, United Kingdom
| | - Marion Leboyer
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, AP-HP, Hôpital Henri Mondor, Département Médico-Universitaire de Psychiatrie et d'Addictologie (DMU IMPACT), Fédération Hospitalo-Universitaire de Médecine de Précision (FHU ADAPT) and Fondation FondaMental, Créteil, F-94010, France
| | - Jean-François Zagury
- Laboratoire Génomique, Bio-informatique et Chimie Moléculaire (EA7528), Conservatoire National des Arts et Métiers, 292, rue Saint Martin, 75003, Paris, France
- HESAM Université, Paris, France
| | - Ryad Tamouza
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, F-94010, Créteil, France.
- Université Paris Est Créteil, INSERM U955, IMRB, Laboratoire Neuro-Psychiatrie translationnelle, AP-HP, Hôpital Henri Mondor, Département Médico-Universitaire de Psychiatrie et d'Addictologie (DMU IMPACT), Fédération Hospitalo-Universitaire de Médecine de Précision (FHU ADAPT) and Fondation FondaMental, Créteil, F-94010, France.
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Shams H, Hollenbach JA, Matsunaga A, Mofrad MRK, Oksenberg JR, Didonna A. A short HLA-DRA isoform binds the HLA-DR2 heterodimer on the outer domain of the peptide-binding site. Arch Biochem Biophys 2022; 719:109156. [PMID: 35218721 PMCID: PMC9007275 DOI: 10.1016/j.abb.2022.109156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 02/06/2022] [Accepted: 02/22/2022] [Indexed: 11/30/2022]
Abstract
The human leukocyte antigen (HLA) locus encodes a large group of proteins governing adaptive and innate immune responses. Among them, HLA class II proteins form α/β heterodimers on the membrane of professional antigen-presenting cells (APCs), where they display both, self and pathogen-derived exogenous antigens to CD4+ T lymphocytes. We have previously shown that a shorter HLA-DRA isoform (sHLA-DRA) lacking 25 amino acids can be presented onto the cell membrane via binding to canonical HLA-DR2 heterodimers. Here, we employed atomistic molecular dynamics simulations to decipher the binding position of sHLA-DRA and its structural impact on functional regions of the HLA-DR2 molecule. We show that a loop region exposed only in the short isoform (residues R69 to G83) is responsible for binding HLA-DR2 on the outer domain of the peptide-binding site, and experimentally validated the critical role of F76 in mediating such interaction. Additionally, sHLA-DRA allosterically modifies the peptide-binding pocket conformation. In summary, this study unravels key molecular mechanisms underlying sHLA-DRA function, providing important insights into the role of full-length proteins in structural modulation of HLA class II receptors.
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Affiliation(s)
- Hengameh Shams
- Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, CA, 94158, USA
| | - Jill A Hollenbach
- Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, CA, 94158, USA; Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, 94158, USA
| | - Atsuko Matsunaga
- Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, CA, 94158, USA
| | - Mohammad R K Mofrad
- Departments of Bioengineering and Mechanical Engineering, University of California, Berkeley, CA, 94720, USA
| | - Jorge R Oksenberg
- Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, CA, 94158, USA
| | - Alessandro Didonna
- Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, CA, 94158, USA; Department of Anatomy and Cell Biology, East Carolina University, Greenville, NC, 27834, USA.
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