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Lecomte K, Toniolo A, Hoste E. Cell death as an architect of adult skin stem cell niches. Cell Death Differ 2024; 31:957-969. [PMID: 38649745 PMCID: PMC11303411 DOI: 10.1038/s41418-024-01297-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 04/09/2024] [Accepted: 04/11/2024] [Indexed: 04/25/2024] Open
Abstract
Our skin provides a physical and immunological barrier against dehydration and environmental insults ranging from microbial attacks, toxins and UV irradiation to wounding. Proper functioning of the skin barrier largely depends on the interplay between keratinocytes- the epithelial cells of the skin- and immune cells. Two spatially distinct populations of keratinocyte stem cells (SCs) maintain the epidermal barrier function and the hair follicle. These SCs are inherently long-lived, but cell death can occur within their niches and impacts their functionality. The default cell death programme in skin is apoptosis, an orderly and non-inflammatory suicide programme. However, recent findings are shedding light on the significance of various modes of regulated necrotic cell death, which are lytic and can provoke inflammation within the local skin environment. While the presence of dying cells was generally regarded as a mere consequence of inflammation, findings in various human dermatological conditions and experimental mouse models of aberrant cell death control demonstrated that cell death programmes in keratinocytes (KCs) can drive skin inflammation and even tumour initiation. When cells die, they need to be removed by phagocytosis and KCs can function as non-professional phagocytes of apoptotic cells with important implications for their SC capacities. It is becoming apparent that in conditions of heightened SC activity, distinct cell death modalities differentially impact the different skin SC populations in their local niches. Here, we describe how regulated cell death modalities functionally affect epidermal SC niches along with their relevance to injury repair, inflammatory skin disorders and cancer.
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Affiliation(s)
- Kim Lecomte
- VIB Center for Inflammation Research, 9052, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Annagiada Toniolo
- VIB Center for Inflammation Research, 9052, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium
| | - Esther Hoste
- VIB Center for Inflammation Research, 9052, Ghent, Belgium.
- Department of Biomedical Molecular Biology, Ghent University, 9052, Ghent, Belgium.
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Wang D, Chen W, Wang Y, Yu J, Bai Y, Luo S, Song C, Wang M, Yu Y, Li Z, Han Y, Zhen Q, Sun L. Genome-Wide Meta-Analysis Identifies 11 Susceptibility Variants of Vitiligo in the Chinese Han Population. J Invest Dermatol 2024; 144:1843-1849.e1. [PMID: 38286188 DOI: 10.1016/j.jid.2024.01.010] [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: 08/12/2023] [Revised: 01/10/2024] [Accepted: 01/18/2024] [Indexed: 01/31/2024]
Abstract
Vitiligo is an autoimmune disease involving loss of melanocytes. Although several genetic studies have confirmed that genetic factors play an important role, its pathogenesis remains incompletely characterized. In this study, a genome-wide meta-analysis was conducted to search for more susceptibility variants of vitiligo. Tang et al performed a GWAS for cohort I (1117 vitiligo cases and 1701 healthy controls) previously, and we conducted a GWAS for cohort II (3323 vitiligo cases and 7186 healthy controls) in this study, with the results subjected to a genome-wide meta-analysis and linkage disequilibrium analysis. We identify, to our knowledge, 11 previously unreported susceptibility variants, of which 6 variants are located in the intronic regions, and the remaining 5 variants are located within intergenic regions between genes. In addition, the results of polygenic risk score show that the best evaluated effect for target data is among significant SNVs of the base data. The susceptibility genes of vitiligo are mainly enriched in the immune-related functions and pathways. The susceptibility variants expand the role of genetic factors associated with vitiligo. The bioinformatics analysis for risk genes provides further insight into the pathogenesis of vitiligo.
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Affiliation(s)
- Daiyue Wang
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Weiwei Chen
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Yirui Wang
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Jing Yu
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Yuanming Bai
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Sihan Luo
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Can Song
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Minhao Wang
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Yanxia Yu
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Zhuo Li
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China
| | - Yang Han
- Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China; School of Public Health, North China University of Science and Technology, Tangshan, China; Health Science Center, North China University of Science and Technology, Tangshan, China
| | - Qi Zhen
- Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China; School of Public Health, North China University of Science and Technology, Tangshan, China; Health Science Center, North China University of Science and Technology, Tangshan, China.
| | - Liangdan Sun
- Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei, China; Department of Dermatology, North China University of Science and Technology Affiliated Hospital, Tangshan, China; School of Public Health, North China University of Science and Technology, Tangshan, China; Health Science Center, North China University of Science and Technology, Tangshan, China; Key Laboratory of Dermatology, Anhui Medical University, Ministry of Education, Hefei, China; Inflammation and Immune Diseases Laboratory, North China University of Science and Technology, Tangshan, China.
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Bharti N, Banerjee R, Achalare A, Kasibhatla SM, Joshi R. Estimation of genetic variation in vitiligo associated genes: Population genomics perspective. BMC Genom Data 2024; 25:72. [PMID: 39060965 PMCID: PMC11282599 DOI: 10.1186/s12863-024-01254-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUND Vitiligo is an auto-immune progressive depigmentation disorder of the skin due to loss of melanocytes. Genetic risk is one of the important factors for development of vitiligo. Preponderance of vitiligo in certain ethnicities is known which can be analysed by understanding the distribution of allele frequencies across normal populations. Earlier GWAS identified 108 risk alleles for vitiligo in Europeans and East Asians. In this study, 64 of these risk alleles were used for analysing their enrichment and depletion across populations (1000 Genomes Project and IndiGen) with reference to 1000 Genomes dataset. Genetic risk scores were calculated and Fisher's exact test was performed to understand statistical significance of their variation in each population with respect to 1000 Genomes dataset as reference. In addition to SNPs reported in GWAS, significant variation in allele frequencies of 1079 vitiligo-related genes were also analysed. Two-tailed Chi-square test and Bonferroni's multiple adjustment values along with fixation index (≥ 0.5) and minimum allele frequency (≥ 0.05) were calculated and used to prioritise the variants based on pairwise comparison across populations. RESULTS Risk alleles rs1043101 and rs10768122 belong to 3 prime UTR of glutamate receptor gene SLC1A2 are found to be highly enriched in the South Asian population when compared with the 'global normal' population. Intron variant rs4766578 (ATXN2) was found to be deleted in SAS, EAS and AFR and enriched in EUR and AMR1. This risk allele is found to be under positive selection in SAS, AMR1 and EUR. From the ancillary vitiligo gene list, nonsynonymous variant rs16891982 was found to be enriched in the European and the Admixed American populations and depleted in all others. rs2279238 and rs11039155 belonging to the LXR-α gene involved in regulation of metalloproteinase 2 and 9 (melanocyte precursors) were found to be associated with vitiligo in the North Indian population (in earlier study). CONCLUSION The differential enrichment/depletion profile of the risk alleles provides insight into the underlying inter-population variations. This would provide clues towards prioritisation of SNPs associated with vitiligo thereby elucidating its preponderance in different ethnic groups.
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Affiliation(s)
- Neeraj Bharti
- HPC-Medical and Bioinformatics Applications Group, Centre for Development of Advanced Computing, Innovation Park, Pashan, Pune, 411008, Maharashtra, India
| | - Ruma Banerjee
- HPC-Medical and Bioinformatics Applications Group, Centre for Development of Advanced Computing, Innovation Park, Pashan, Pune, 411008, Maharashtra, India
| | - Archana Achalare
- HPC-Medical and Bioinformatics Applications Group, Centre for Development of Advanced Computing, Innovation Park, Pashan, Pune, 411008, Maharashtra, India
| | - Sunitha Manjari Kasibhatla
- HPC-Medical and Bioinformatics Applications Group, Centre for Development of Advanced Computing, Innovation Park, Pashan, Pune, 411008, Maharashtra, India
| | - Rajendra Joshi
- HPC-Medical and Bioinformatics Applications Group, Centre for Development of Advanced Computing, Innovation Park, Pashan, Pune, 411008, Maharashtra, India.
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Qu JM, Wen SJ, Lin YK, Lu HX, Huang KQ, Maansson CT, Lee CS, Araki T. Retrospective clinical study analysis of skin adverse reactions related to epidermal growth factor receptor inhibitors. Transl Cancer Res 2024; 13:3016-3030. [PMID: 38988913 PMCID: PMC11231804 DOI: 10.21037/tcr-24-486] [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: 03/25/2024] [Accepted: 05/24/2024] [Indexed: 07/12/2024]
Abstract
Background Epidermal growth factor receptor inhibitors (EGFRIs) represent a cornerstone in the targeted therapy of malignant tumors. While effective, dermatological adverse events (dAEs) associated with EGFRIs pose a significant challenge, often necessitating treatment discontinuation due to their severity and potential to impede the continuity of cancer therapy. Despite extensive research, the specific mechanisms and predictors of these adverse events remain poorly understood, particularly in diverse populations. This gap in knowledge underscores the need for targeted studies to better predict and manage these events, enhancing patient outcomes and adherence to life-saving therapies. Methods This observational study was conducted at The First Affiliated Hospital of Guangxi Medical University, covering cancer patients treated with EGFRIs from 2020 to 2022. We analyzed clinical data including patient demographics, treatment specifics, and the development and timing of dAEs. The study employed SPSS 26.0 software for data analysis, focusing on the incidence of dAEs and factors influencing their occurrence. We used Kaplan-Meier and Cox regression methods to establish a predictive model for dAEs, tracking their onset and impact on treatment continuity. Results In our study of 120 patients treated with EGFR inhibitors at The First Affiliated Hospital of Guangxi Medical University, we found a high prevalence of dAEs, with 84.2% of patients experiencing such effects. The most common manifestations were papulopustular rashes, observed as pustules in 52.5% and papules in 57.4% of cases, followed by nail lesions in 62.4% of patients, oral or other mucosal ulcers in 34.7%, and hair changes in 26.7%. The median incubation time (MIT) for dAEs was 5 weeks. We identified drug type, ethnicity, and occupation as statistically significant risk factors (P<0.05 for all) that influenced the MIT, which the Cox regression model further identified as protective factors. Nomograms were developed to assess the risk of dAEs, although it is important to note that these models have only been internally validated, lacking external validation data at this stage. Conclusions The study highlights the high incidence of EGFRIs-associated dAEs, with specific dermatological manifestations posing significant challenges in cancer therapy. The identification of drug type, ethnicity, and occupation as influential factors on the MIT for dAEs informs clinical decisions. Our prediction model serves as a practical tool for evaluating the risk of developing dAEs over time, aiming to optimize patient management and mitigate treatment interruptions.
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Affiliation(s)
- Jin-Ming Qu
- Department of Dermatology and Venereology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Si-Jian Wen
- Department of Dermatology and Venereology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - You-Kun Lin
- Department of Dermatology and Venereology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Hua-Xiang Lu
- Center for Disease Control and Prevention of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Kun-Qian Huang
- Department of Dermatology and Venereology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | | | - Chung-Shien Lee
- Department of Clinical Health Professions, St. John’s University, College of Pharmacy and Health Sciences, Queens, NY, USA
| | - Taisuke Araki
- First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
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Reeve MP, Vehviläinen M, Luo S, Ritari J, Karjalainen J, Gracia-Tabuenca J, Mehtonen J, Padmanabhuni SS, Kolosov N, Artomov M, Siirtola H, Olilla HM, Graham D, Partanen J, Xavier RJ, Daly MJ, Ripatti S, Salo T, Siponen M. Oral and non-oral lichen planus show genetic heterogeneity and differential risk for autoimmune disease and oral cancer. Am J Hum Genet 2024; 111:1047-1060. [PMID: 38776927 PMCID: PMC11179409 DOI: 10.1016/j.ajhg.2024.04.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/23/2024] [Accepted: 04/25/2024] [Indexed: 05/25/2024] Open
Abstract
Lichen planus (LP) is a T-cell-mediated inflammatory disease affecting squamous epithelia in many parts of the body, most often the skin and oral mucosa. Cutaneous LP is usually transient and oral LP (OLP) is most often chronic, so we performed a large-scale genetic and epidemiological study of LP to address whether the oral and non-oral subgroups have shared or distinct underlying pathologies and their overlap with autoimmune disease. Using lifelong records covering diagnoses, procedures, and clinic identity from 473,580 individuals in the FinnGen study, genome-wide association analyses were conducted on carefully constructed subcategories of OLP (n = 3,323) and non-oral LP (n = 4,356) and on the combined group. We identified 15 genome-wide significant associations in FinnGen and an additional 12 when meta-analyzed with UKBB (27 independent associations at 25 distinct genomic locations), most of which are shared between oral and non-oral LP. Many associations coincide with known autoimmune disease loci, consistent with the epidemiologic enrichment of LP with hypothyroidism and other autoimmune diseases. Notably, a third of the FinnGen associations demonstrate significant differences between OLP and non-OLP. We also observed a 13.6-fold risk for tongue cancer and an elevated risk for other oral cancers in OLP, in agreement with earlier reports that connect LP with higher cancer incidence. In addition to a large-scale dissection of LP genetics and comorbidities, our study demonstrates the use of comprehensive, multidimensional health registry data to address outstanding clinical questions and reveal underlying biological mechanisms in common but understudied diseases.
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Affiliation(s)
- Mary Pat Reeve
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland; Broad Institute of MIT and Harvard, Cambridge, MA, USA.
| | - Mari Vehviläinen
- Department of Oral and Maxillofacial Diseases, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Shuang Luo
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Jarmo Ritari
- Finnish Red Cross Blood Service, Helsinki, Finland
| | - Juha Karjalainen
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Javier Gracia-Tabuenca
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Juha Mehtonen
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Shanmukha Sampath Padmanabhuni
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Nikita Kolosov
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland; Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, OH, USA; Ohio State University College of Medicine, Columbus, OH, USA
| | - Mykyta Artomov
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland; Institute for Genomic Medicine, Nationwide Children's Hospital, Columbus, OH, USA; Ohio State University College of Medicine, Columbus, OH, USA
| | - Harri Siirtola
- TAUCHI Research Center, Tampere University, Tampere, Finland
| | - Hanna M Olilla
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Genomic Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Daniel Graham
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Computational and Integrative Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA; Department of Molecular Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA; Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | | | - Ramnik J Xavier
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Center for Computational and Integrative Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA; Department of Molecular Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA; Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Mark J Daly
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland; Broad Institute of MIT and Harvard, Cambridge, MA, USA; Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Analytical and Translational Genetics Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Samuli Ripatti
- Institute for Molecular Medicine Finland (FIMM), Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Tuula Salo
- Research Unit of Population Health, Department of Oral Pathology, University of Oulu and Oulu University Hospital, Oulu, Finland; Medical Research Center, Oulu University Hospital, Oulu, Finland; Department of Oral and Maxillofacial Diseases, and Translational Immunology Program (TRIMM), University of Helsinki, Helsinki, Finland
| | - Maria Siponen
- Institute of Dentistry, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland; Odontology Education Unit, and Oral and Maxillofacial Diseases Clinic, Kuopio University Hospital, Kuopio, Finland
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Gholami M. Novel genetic association between obesity, colorectal cancer, and inflammatory bowel disease. J Diabetes Metab Disord 2024; 23:739-744. [PMID: 38932827 PMCID: PMC11196566 DOI: 10.1007/s40200-023-01343-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 11/06/2023] [Indexed: 06/28/2024]
Abstract
Purpose Obesity/overweight is an important risk factor for CRC and IBD. The aim of this study was to investigate the role of common genetic factors and haplotypes associated with obesity, CRC and IBD. Methods Significant GWAS variants associated with CRC, IBD or obesity were extracted from the GWAS catalog. The common variants between CRC-IBD, CRC-obesity or IBD-obesity were identified. Finally, the haplotypic structure between these diseases was identified, and SNP function analysis, gene-gene expression, protein-protein interactions, gene survival analysis and pathway analysis were performed with the results. Results While the results showed several common variants between CRC and IBD, IBD and obesity, and CRC and obesity identified in previous GWAS, rs3184504 was the only common variant for CRC-IBD-obesity (P ≤ 5E-8). The result also identified a haplotypic block AGCAGT (r2 ≥ 0.8 and D'≥0.08) associated with the common variants of CRC-IBD-obesity. These variants are located on the SH2B3 gene, whose expression level decreases in both colon and rectal cancers (P ≤ 1E-3) and which has protein-protein interaction with inflammation- and cancer-associated genes. Conclusion The rs3184504 variant and the novel haplotype AGCAGT co-occurred in CRC, IBD, obesity, and inflammation. This novel haplotype could potentially be used in genetic panels to identify CRC/IBD susceptibility in obese patients.
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Affiliation(s)
- Morteza Gholami
- North Research Center, Pasteur Institute of Iran, Amol, Iran
- Metabolic Disorders Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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Zwick D, Vo MT, Shim YJ, Reijonen H, Do JS. BACH2: The Future of Induced T-Regulatory Cell Therapies. Cells 2024; 13:891. [PMID: 38891024 PMCID: PMC11172166 DOI: 10.3390/cells13110891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 06/20/2024] Open
Abstract
BACH2 (BTB Domain and CNC Homolog 2) is a transcription factor that serves as a central regulator of immune cell differentiation and function, particularly in T and B lymphocytes. A picture is emerging that BACH2 may function as a master regulator of cell fate that is exquisitely sensitive to cell activation status. In particular, BACH2 plays a key role in stabilizing the phenotype and suppressive function of transforming growth factor-beta (TGF-β)-derived human forkhead box protein P3 (FOXP3)+ inducible regulatory T cells (iTregs), a cell type that holds great clinical potential as a cell therapeutic for diverse inflammatory conditions. As such, BACH2 potentially could be targeted to overcome the instability of the iTreg phenotype and suppressive function that has hampered their clinical application. In this review, we focus on the role of BACH2 in T cell fate and iTreg function and stability. We suggest approaches to modulate BACH2 function that may lead to more stable and efficacious Treg cell therapies.
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Affiliation(s)
- Daniel Zwick
- Frederick National Laboratory, Frederick, MD 21701, USA
| | - Mai Tram Vo
- School of Medicine, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Young Jun Shim
- Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA;
| | - Helena Reijonen
- Department of Immunology and Theranostics, City of Hope, Duarte, CA 91010, USA;
| | - Jeong-su Do
- Department of Immunology and Theranostics, City of Hope, Duarte, CA 91010, USA;
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Chivukula N, Ramesh K, Subbaroyan A, Sahoo AK, Dhanakoti GB, Ravichandran J, Samal A. ViCEKb: Vitiligo-linked Chemical Exposome Knowledgebase. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169711. [PMID: 38160837 DOI: 10.1016/j.scitotenv.2023.169711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/23/2023] [Accepted: 12/25/2023] [Indexed: 01/03/2024]
Abstract
Vitiligo is a complex disease wherein the environmental factors, in conjunction with the underlying genetic predispositions, trigger the autoimmune destruction of melanocytes, ultimately leading to depigmented patches on the skin. While genetic factors have been extensively studied, the knowledge on environmental triggers remains sparse and less understood. To address this knowledge gap, we present the first comprehensive knowledgebase of vitiligo-triggering chemicals namely, Vitiligo-linked Chemical Exposome Knowledgebase (ViCEKb). ViCEKb involves an extensive and systematic manual effort in curation of published literature and subsequent compilation of 113 unique chemical triggers of vitiligo. ViCEKb standardizes various chemical information, and categorizes the chemicals based on their evidences and sources of exposure. Importantly, ViCEKb contains a wide range of metrics necessary for different toxicological evaluations. Notably, we observed that ViCEKb chemicals are present in a variety of consumer products. For instance, Propyl gallate is present as a fragrance substance in various household products, and Flutamide is used in medication to treat prostate cancer. These two chemicals have the highest level of evidence in ViCEKb, but are not regulated for their skin sensitizing effects. Furthermore, an extensive cheminformatics-based investigation revealed that ViCEKb chemical space is structurally diverse and comprises unique chemical scaffolds in comparison with skin specific regulatory lists. For example, Neomycin and 2,3,5-Triglycidyl-4-aminophenol have unique chemical scaffolds and the highest level of evidence in ViCEKb, but are not regulated for their skin sensitizing effects. Finally, a transcriptomics-based analysis of ViCEKb chemical perturbations in skin cell samples highlighted the commonality in their linked biological processes. Overall, we present the first comprehensive effort in compilation and exploration of various chemical triggers of vitiligo. We believe such a resource will enable in deciphering the complex etiology of vitiligo and aid in the characterization of human chemical exposome. ViCEKb is freely available for academic research at: https://cb.imsc.res.in/vicekb.
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Affiliation(s)
- Nikhil Chivukula
- The Institute of Mathematical Sciences (IMSc), Chennai, India; Homi Bhabha National Institute (HBNI), Mumbai, India
| | | | - Ajay Subbaroyan
- The Institute of Mathematical Sciences (IMSc), Chennai, India; Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Ajaya Kumar Sahoo
- The Institute of Mathematical Sciences (IMSc), Chennai, India; Homi Bhabha National Institute (HBNI), Mumbai, India
| | | | - Janani Ravichandran
- The Institute of Mathematical Sciences (IMSc), Chennai, India; Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Areejit Samal
- The Institute of Mathematical Sciences (IMSc), Chennai, India; Homi Bhabha National Institute (HBNI), Mumbai, India.
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9
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Lu J, Song L, Luan J, Feng Y, Wang Y, Cao X, Lu Y. Identification of Shared Biomarkers and Immune Infiltration Signatures between Vitiligo and Hashimoto's Thyroiditis. Clin Cosmet Investig Dermatol 2024; 17:311-327. [PMID: 38327551 PMCID: PMC10847670 DOI: 10.2147/ccid.s451080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 01/23/2024] [Indexed: 02/09/2024]
Abstract
Background Vitiligo and Hashimoto's thyroiditis (HT) are concomitant autoimmune diseases characterized by the destruction of melanocytes or thyrocytes. We aimed to explore the immunological mechanism of this comorbidity and screen their potential biomarkers. Methods We downloaded the microarray datasets from the GEO database. Differentially expressed genes (DEGs) and immune-related genes (IRGs) were selected. The immune-related differentially expressed genes (IRDEGs) were obtained by taking the intersection. Candidate biomarkers were elected by Cytoscape software. CIBERSORT was used to depict immune cell infiltration prospects. Correlation analysis was conducted between infiltrating cells and several indicators. The results were validated by real-time quantitative PCR (RT-qPCR). Results Three datasets and 60 IRDEGs were obtained in total. Pathway enrichment analysis showed that the T cell receptor signaling pathway, IL-17 signaling pathway, receptor-ligand activity, and signaling receptor activator activity were significantly enriched. We screened out four hub genes, including IFNG, STAT1, IL1B, and CXCL10. The ROC curve indicated the highest diagnostic value of CXCL10 in both vitiligo and HT. Immuno-infiltration analysis revealed significant changes in T cell subsets and macrophage subtypes, which were correlated with four hub genes, melanocyte markers, and thyroid-specific antigens. qPCR validated the hub genes in peripheral blood mononuclear cells from patients with comorbidity. Conclusion IFNG, STAT1, IL1B, and CXCL10, were the key IRDEGs to vitiligo and HT. These genes may participate in the comorbidity by remodeling the immune cell infiltration pattern, and cross-expressed antigens may mediate the common damage of melanocytes and thyroid tissues.
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Affiliation(s)
- Jiawei Lu
- Department of Dermatology, The First Affiliated Hospital, Nanjing Medical University, Nanjing, People’s Republic of China
| | - Lebin Song
- Department of Dermatology, The First Affiliated Hospital, Nanjing Medical University, Nanjing, People’s Republic of China
| | - Jiaochen Luan
- Department of Urology, The First Affiliated Hospital, Nanjing Medical University, Nanjing, People’s Republic of China
| | - Yifei Feng
- Department of Dermatology, The First Affiliated Hospital, Nanjing Medical University, Nanjing, People’s Republic of China
| | - Yidan Wang
- Department of Dermatology, The First Affiliated Hospital, Nanjing Medical University, Nanjing, People’s Republic of China
| | - Xuechen Cao
- Department of Dermatology, The First Affiliated Hospital, Nanjing Medical University, Nanjing, People’s Republic of China
| | - Yan Lu
- Department of Dermatology, The First Affiliated Hospital, Nanjing Medical University, Nanjing, People’s Republic of China
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10
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Liu LY, He SJ, Chen Z, Ge M, Lyu CY, Gao D, Yu JP, Cai MH, Yuan JX, Zhang JL. The Role of Regulatory Cell Death in Vitiligo. DNA Cell Biol 2024; 43:61-73. [PMID: 38153369 DOI: 10.1089/dna.2023.0188] [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] [Indexed: 12/29/2023] Open
Abstract
Vitiligo is one of the common chronic autoimmune skin diseases in clinic, which is characterized by localized or generalized depigmentation and seriously affects the physical and mental health of patients. At present, the pathogenesis of vitiligo is not clear; mainly, heredity, autoimmunity, oxidative stress, melanocyte (MC) self-destruction, and the destruction, death, or dysfunction of MCs caused by various reasons are always the core of vitiligo. Regulatory cell death (RCD) is an active and orderly death mode of cells regulated by genes, which widely exists in various life activities, plays a pivotal role in maintaining the homeostasis of the organism, and is closely related to the occurrence and development of many diseases. With the deepening of the research and understanding of RCD, people gradually found that there are many different forms of RCD in the lesions and perilesional skin of vitiligo patients, such as apoptosis, autophagy, pyroptosis, ferroptosis, and so on. Different cell death modes have different mechanisms in vitiligo, and different RCDs can interact and regulate each other. In this article, the mechanism related to RCD in the pathogenesis of vitiligo is reviewed, which provides new ideas for exploring the pathogenesis and targeted treatment of vitiligo.
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Affiliation(s)
- Lyu-Ye Liu
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, People's Republic of China
| | - Si-Jia He
- Department of Dermatology, Tianjin Academy of Traditional Chinese Medicine Affiliated Hospital, Tianjin, People's Republic of China
| | - Zhao Chen
- First Clinical Medical College Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
| | - Man Ge
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, People's Republic of China
| | - Chun-Yi Lyu
- First Clinical Medical College Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
| | - Dandan Gao
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, People's Republic of China
| | - Ji-Peng Yu
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, People's Republic of China
| | - Meng-Han Cai
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, People's Republic of China
| | - Jin-Xiang Yuan
- Graduate School, Tianjin University of Traditional Chinese Medicine, Tianjin, People's Republic of China
| | - Jun-Ling Zhang
- Department of Dermatology, Tianjin Academy of Traditional Chinese Medicine Affiliated Hospital, Tianjin, People's Republic of China
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11
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Kastner P, Chan S. IKAROS Family Transcription Factors in Lymphocyte Differentiation and Function. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1459:33-52. [PMID: 39017838 DOI: 10.1007/978-3-031-62731-6_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
The IKAROS family of transcription factors comprises four zinc-finger proteins (IKAROS, HELIOS, AIOLOS, and EOS), which over the last decades have been established to be critical regulators of the development and function of lymphoid cells. These factors act as homo- or heterodimers and are involved both in gene activation and repression. Their function often involves cross-talk with other regulatory circuits, such as the JAK/STAT, NF-κB, and NOTCH pathways. They control lymphocyte differentiation at multiple stages and are notably critical for lymphoid commitment in multipotent hematopoietic progenitors and for T and B cell differentiation downstream of pre-TCR and pre-BCR signaling. They also control many aspects of effector functions in mature B and T cells. They are dysregulated or mutated in multiple pathologies affecting the lymphoid system, which range from leukemia to immunodeficiencies. In this chapter, we review the molecular and physiological function of these factors in lymphocytes and their implications in human pathologies.
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Affiliation(s)
- Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch-Graffenstaden, France.
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch-Graffenstaden, France.
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch-Graffenstaden, France.
- Université de Strasbourg, Illkirch-Graffenstaden, France.
- Faculté de Médecine, Université de Strasbourg, Strasbourg, France.
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch-Graffenstaden, France.
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch-Graffenstaden, France.
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch-Graffenstaden, France.
- Université de Strasbourg, Illkirch-Graffenstaden, France.
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12
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Boniface K. Aetiopathogenesis of Vitiligo. Dermatol Pract Concept 2023; 13:dpc.1304S2a314S. [PMID: 38241397 PMCID: PMC10824321 DOI: 10.5826/dpc.1304s2a314s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2023] [Indexed: 01/21/2024] Open
Abstract
Vitiligo is a chronic auto-immune disease characterized by skin depigmentation due to the loss of melanocytes. The better understanding of the disease mechanisms is currently undergoing a significant dynamism, opening a new era in therapeutic development. The pathophysiology of vitiligo has attracted the attention of researchers for years and many advances have been made in clarifying the crosstalk between the cellular players involved in the development of vitiligo lesions. The understanding of the complex interactions between epidermal cells (i.e. melanocytes and keratinocytes), dermal fibroblasts, and immune cells, led to a better characterization of the signals leading to the loss of melanocytes. Recent advances highlighted the role resident T memory cells in the development and recurrence of lesions. This narrative review aims to give an overview of the mechanisms leading to melanocyte disappearance in vitiligo, with a focus on the intercellular interaction network involved in the activation of the local skin immune response.
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Affiliation(s)
- Katia Boniface
- University of Bordeaux, CNRS, Immuno ConcEpT, UMR 5164, Bordeaux, France
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13
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Jeremian R, Xie P, Fotovati M, Lefrançois P, Litvinov IV. Gene-Environment Analyses in a UK Biobank Skin Cancer Cohort Identifies Important SNPs in DNA Repair Genes That May Help Prognosticate Disease Risk. Cancer Epidemiol Biomarkers Prev 2023; 32:1599-1607. [PMID: 37642678 PMCID: PMC10840669 DOI: 10.1158/1055-9965.epi-23-0545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/12/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023] Open
Abstract
BACKGROUND Despite well-established relationships between sun exposure and skin cancer pathogenesis/progression, specific gene-environment interactions in at-risk individuals remain poorly-understood. METHODS We leveraged a UK Biobank cohort of basal cell carcinoma (BCC, n = 17,221), cutaneous squamous cell carcinoma (cSCC, n = 2,331), melanoma in situ (M-is, n = 1,158), invasive melanoma (M-inv, n = 3,798), and healthy controls (n = 448,164) to quantify the synergistic involvement of genetic and environmental factors influencing disease risk. We surveyed 8,798 SNPs from 190 DNA repair genes, and 11 demographic/behavioral risk factors. RESULTS Clinical analysis identified darker skin (RR = 0.01-0.65) and hair (RR = 0.27-0.63) colors as protective factors. Eleven SNPs were significantly associated with BCC, three of which were also associated with M-inv. Gene-environment analysis yielded 201 SNP-environment interactions across 90 genes (FDR-adjusted q < 0.05). SNPs from the FANCA gene showed interactions with at least one clinical factor in all cancer groups, of which three (rs9926296, rs3743860, rs2376883) showed interaction with nearly every factor in BCC and M-inv. CONCLUSIONS We identified novel risk factors for keratinocyte carcinomas and melanoma, highlighted the prognostic value of several FANCA alleles among individuals with a history of sunlamp use and childhood sunburns, and demonstrated the importance of combining genetic and clinical data in disease risk stratification. IMPACT This study revealed genome-wide associations with important implications for understanding skin cancer risk in the context of the rapidly-evolving field of precision medicine. Major individual factors (including sex, hair and skin color, and sun protection use) were significant mediators for all skin cancers, interacting with >200 SNPs across four skin cancer types.
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Affiliation(s)
- Richie Jeremian
- Faculty of Medicine and Health Sciences, McGill University
- Department of Medicine, Division of Dermatology, Research Institute of the McGill University Health Centre (RI-MUHC) Montreal, Quebec
| | - Pingxing Xie
- Faculty of Medicine and Health Sciences, McGill University
- Department of Medicine, Division of Dermatology, Research Institute of the McGill University Health Centre (RI-MUHC) Montreal, Quebec
| | - Misha Fotovati
- Faculty of Medicine and Health Sciences, McGill University
- Department of Medicine, Division of Dermatology, Lady Davis Institute (LDI), Jewish General Hospital, Montreal, Quebec
| | - Philippe Lefrançois
- Faculty of Medicine and Health Sciences, McGill University
- Department of Medicine, Division of Dermatology, Lady Davis Institute (LDI), Jewish General Hospital, Montreal, Quebec
| | - Ivan V. Litvinov
- Faculty of Medicine and Health Sciences, McGill University
- Department of Medicine, Division of Dermatology, Research Institute of the McGill University Health Centre (RI-MUHC) Montreal, Quebec
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14
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Talwar JV, Laub D, Pagadala MS, Castro A, Lewis M, Luebeck GE, Gorman BR, Pan C, Dong FN, Markianos K, Teerlink CC, Lynch J, Hauger R, Pyarajan S, Tsao PS, Morris GP, Salem RM, Thompson WK, Curtius K, Zanetti M, Carter H. Autoimmune alleles at the major histocompatibility locus modify melanoma susceptibility. Am J Hum Genet 2023; 110:1138-1161. [PMID: 37339630 PMCID: PMC10357503 DOI: 10.1016/j.ajhg.2023.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 05/20/2023] [Accepted: 05/22/2023] [Indexed: 06/22/2023] Open
Abstract
Autoimmunity and cancer represent two different aspects of immune dysfunction. Autoimmunity is characterized by breakdowns in immune self-tolerance, while impaired immune surveillance can allow for tumorigenesis. The class I major histocompatibility complex (MHC-I), which displays derivatives of the cellular peptidome for immune surveillance by CD8+ T cells, serves as a common genetic link between these conditions. As melanoma-specific CD8+ T cells have been shown to target melanocyte-specific peptide antigens more often than melanoma-specific antigens, we investigated whether vitiligo- and psoriasis-predisposing MHC-I alleles conferred a melanoma-protective effect. In individuals with cutaneous melanoma from both The Cancer Genome Atlas (n = 451) and an independent validation set (n = 586), MHC-I autoimmune-allele carrier status was significantly associated with a later age of melanoma diagnosis. Furthermore, MHC-I autoimmune-allele carriers were significantly associated with decreased risk of developing melanoma in the Million Veteran Program (OR = 0.962, p = 0.024). Existing melanoma polygenic risk scores (PRSs) did not predict autoimmune-allele carrier status, suggesting these alleles provide orthogonal risk-relevant information. Mechanisms of autoimmune protection were neither associated with improved melanoma-driver mutation association nor improved gene-level conserved antigen presentation relative to common alleles. However, autoimmune alleles showed higher affinity relative to common alleles for particular windows of melanocyte-conserved antigens and loss of heterozygosity of autoimmune alleles caused the greatest reduction in presentation for several conserved antigens across individuals with loss of HLA alleles. Overall, this study presents evidence that MHC-I autoimmune-risk alleles modulate melanoma risk unaccounted for by current PRSs.
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Affiliation(s)
- James V Talwar
- Department of Medicine, Division of Medical Genetics, University of California San Diego, La Jolla, CA 92093, USA; Bioinformatics and Systems Biology Program, University of California San Diego, La Jolla, CA 92093, USA
| | - David Laub
- Department of Medicine, Division of Medical Genetics, University of California San Diego, La Jolla, CA 92093, USA; Bioinformatics and Systems Biology Program, University of California San Diego, La Jolla, CA 92093, USA
| | - Meghana S Pagadala
- Biomedical Science Program, University of California San Diego, La Jolla, CA 92093, USA
| | - Andrea Castro
- Department of Medicine, Division of Medical Genetics, University of California San Diego, La Jolla, CA 92093, USA; Bioinformatics and Systems Biology Program, University of California San Diego, La Jolla, CA 92093, USA
| | - McKenna Lewis
- Department of Computer Science and Engineering, University of California San Diego, La Jolla, CA 92093, USA
| | - Georg E Luebeck
- Public Health Sciences Division, Herbold Computational Biology Program, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Bryan R Gorman
- Center for Data and Computational Sciences (C-DACS), VA Boston Healthcare System, Boston, MA 02130, USA; Booz Allen Hamilton, Inc., McLean, VA 22102, USA
| | - Cuiping Pan
- Palo Alto Epidemiology Research and Information Center for Genomics, VA Palo Alto, CA, USA
| | - Frederick N Dong
- Center for Data and Computational Sciences (C-DACS), VA Boston Healthcare System, Boston, MA 02130, USA; Booz Allen Hamilton, Inc., McLean, VA 22102, USA
| | - Kyriacos Markianos
- Center for Data and Computational Sciences (C-DACS), VA Boston Healthcare System, Boston, MA 02130, USA; Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard and MIT, Cambridge, MA 02115, USA
| | - Craig C Teerlink
- Department of Veterans Affairs Informatics and Computing Infrastructure (VINCI), VA Salt Lake City Healthcare System, Salt Lake City, UT, USA; Department of Internal Medicine, Division of Epidemiology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Julie Lynch
- Department of Veterans Affairs Informatics and Computing Infrastructure (VINCI), VA Salt Lake City Healthcare System, Salt Lake City, UT, USA; Department of Internal Medicine, Division of Epidemiology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Richard Hauger
- VA San Diego Healthcare System, La Jolla, CA, USA; Center for Behavioral Genetics of Aging, University of California San Diego, La Jolla, CA, USA; Center of Excellence for Stress and Mental Health (CESAMH), VA San Diego Healthcare System, San Diego, CA, USA
| | - Saiju Pyarajan
- Center for Data and Computational Sciences (C-DACS), VA Boston Healthcare System, Boston, MA 02130, USA; Department of Medicine, Brigham Women's Hospital, Boston, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Philip S Tsao
- Palo Alto Epidemiology Research and Information Center for Genomics, VA Palo Alto, CA, USA; Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Gerald P Morris
- Department of Pathology, University of California San Diego, La Jolla, CA 92093, USA
| | - Rany M Salem
- Division of Epidemiology, Herbert Wertheim School of Public Health and Human Longevity Science, University of California San Diego, La Jolla, CA 92093, USA
| | - Wesley K Thompson
- Center for Population Neuroscience and Genetics, Laureate Institute for Brain Research, Tulsa, OK 74136, USA
| | - Kit Curtius
- Bioinformatics and Systems Biology Program, University of California San Diego, La Jolla, CA 92093, USA; Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA; Division of Biomedical Informatics, Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | - Maurizio Zanetti
- Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA; The Laboratory of Immunology, University of California San Diego, La Jolla, CA 92093, USA; Department of Medicine, Division of Hematology and Oncology, University of California San Diego, La Jolla, CA 92093, USA
| | - Hannah Carter
- Department of Medicine, Division of Medical Genetics, University of California San Diego, La Jolla, CA 92093, USA; Bioinformatics and Systems Biology Program, University of California San Diego, La Jolla, CA 92093, USA; Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA.
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15
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Iwanowski T, Kołkowski K, Nowicki RJ, Sokołowska-Wojdyło M. Etiopathogenesis and Emerging Methods for Treatment of Vitiligo. Int J Mol Sci 2023; 24:ijms24119749. [PMID: 37298700 DOI: 10.3390/ijms24119749] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 05/28/2023] [Accepted: 06/02/2023] [Indexed: 06/12/2023] Open
Abstract
Vitiligo is an acquired chronic depigmenting disorder of skin. It is mostly asymptomatic and characterized by amelanotic macules and patches that affects 0.5% to 2% of the world's population. The etiology of vitiligo has not been clearly elucidated and multiple theories have been proposed regarding the causes of the disorder. Among the most prevalent theories, the genetic predisposition, oxidative stress theory, promotion of cellular stress and pathologic influence of lymphocytes T have been highlighted. As a result of increases in in-depth knowledge concerning the pathogenetic processes in vitiligo, we review the most recent information concerning its etiopathogenesis and treatment methods including topical and oral Janus kinase inhibitors, prostaglandins and their analogues, namely afamelanotide, Wnt/β-catenin-signaling agonists and cell-based therapies. Topical ruxolitinib has been registered for vitiligo treatment, whereas other agents as oral ritlecitinib, afamelanotide and latanoprost have been studied in ongoing clinical trials. New highly effective therapeutic strategies may be developed thanks to molecular and genetic studies.
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Affiliation(s)
| | - Karol Kołkowski
- Dermatological Students Scientific Association, Department of Dermatology, Venerology and Allergology, Faculty of Medicine, Medical University of Gdansk, 80-214 Gdansk, Poland
| | - Roman Janusz Nowicki
- Department of Dermatology, Venerology and Allergology, Faculty of Medicine, Medical University of Gdansk, 80-214 Gdansk, Poland
| | - Małgorzata Sokołowska-Wojdyło
- Department of Dermatology, Venerology and Allergology, Faculty of Medicine, Medical University of Gdansk, 80-214 Gdansk, Poland
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16
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Fichna M, Małecki PP, Żurawek M, Furman K, Gębarski B, Fichna P, Ruchała M. Genetic variants and risk of endocrine autoimmunity in relatives of patients with Addison's disease. Endocr Connect 2023; 12:e230008. [PMID: 37010089 PMCID: PMC10235924 DOI: 10.1530/ec-23-0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 04/03/2023] [Indexed: 04/04/2023]
Abstract
Since individuals with Addison's disease (AD) present considerable co-occurrence of additional autoimmune conditions, clustering of autoimmunity was also predicted among their relatives. The study was aimed to assess circulating autoantibodies in first-degree relatives of patients with AD and to correlate them with the established genetic risk factors (PTPN22 rs2476601, CTLA4 rs231775, and BACH2 rs3757247). Antibodies were evaluated using validated commercial assays, and genotyping was performed using TaqMan chemistry. The studied cohort comprised 112 female and 75 male relatives. Circulating autoantibodies were found in 69 relatives (36.9%). Thyroid autoantibodies, that is antibodies to thyroid peroxidase (aTPO) and thyroglobulin (aTg), were detectable in 25.1 and 17.1% relatives, respectively. Antibodies to 21-hydroxylase (a21OH) were found in 5.8% individuals, and beta cell-specific antibodies to ZnT8, GAD, and IA2 were found in 7.5, 8.0, and 2.7%, respectively. The prevalence of a21OH (P = 0.0075; odds ratio (OR) 7.68; 95% CI 1.903-36.0), aTPO (P < 0.0001; OR 3.85; 95% CI 1.873-7.495), and aTg (P < 0.0001; OR 7.73; 95% CI 3.112-19.65), as well as aGAD (P = 0.0303; OR 3.38; 95% CI 1.180-9.123) and aZnT8 (P = 0.032; OR 6.40; 95% CI 1.846-21.91), was significantly increased in carriers of rs2476601 T allele. Moreover, T allele appeared to be a risk factor for multiple circulating autoantibody specificities (P = 0.0009; OR 5.79; 95% CI 1.962-15.81). None of the studied autoantibodies demonstrated significant association with rs231775 in CTLA4 (P > 0.05), and only weak association was detected between BACH2 rs3757247 and circulating aTPO (P = 0.0336; OR 2.12; 95%CI 1.019-4.228). In conclusion, first-degree relatives of patients with AD, carriers of the PTPN22 rs2476601 T allele, are at particular risk of developing autoantibodies to endocrine antigens.
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Affiliation(s)
- Marta Fichna
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Piotr P Małecki
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Magdalena Żurawek
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | | | | | - Piotr Fichna
- Department of Paediatric Diabetes and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | - Marek Ruchała
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
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17
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Ishaq R, Ilyas M, Habiba U, Amin MNU, Saeed S, Raja GK, Shaiq PA, Ahmed ZM. Whole Exome Sequencing Reveals Clustering of Variants of Known Vitiligo Genes in Multiplex Consanguineous Pakistani Families. Genes (Basel) 2023; 14:genes14051118. [PMID: 37239478 DOI: 10.3390/genes14051118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/12/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023] Open
Abstract
Vitiligo is an autoimmune complex pigmentation disease characterized by non-pigmented patches on the surface of the skin that affect approximately 0.5-2% population worldwide. The exact etiology is still unknown; however, vitiligo is hypothesized to be a multifactorial and genetically heterogeneous condition. Therefore, the current study is designed to investigate the anthropometric presentation and genetic spectrum of vitiligo in fifteen consanguineous Pakistani families. The clinical evaluation of participating individuals revealed varying degrees of disease severity, with 23 years as the average age of disease onset. The majority of the affected individuals had non-segmental vitiligo (NSV). Whole exome sequencing analysis revealed clustering of rare variants of known vitiligo-associated genes. For instance, in the affected individuals of family VF-12, we identified three novel rare variants of PTPN22 (c.1108C>A), NRROS (c.197C>T) and HERC2 (c.10969G>A) genes. All three variants replaced evolutionarily conserved amino acid residues in encoded proteins, which are predicted to impact the ionic interactions in the secondary structure. Although various in silico algorithms predicted low effect sizes for these variants individually, the clustering of them in affected individuals increases the polygenic burden of risk alleles. To our knowledge, this is the first study that highlights the complex etiology of vitiligo and genetic heterogeneity in multiplex consanguineous Pakistani families.
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Affiliation(s)
- Rafaqat Ishaq
- University Institute of Biochemistry and Biotechnology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Maryland, Baltimore, MD 20742, USA
| | - Muhammad Ilyas
- University Institute of Biochemistry and Biotechnology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
- Department of Medical Laboratory Technology, Riphah International University, Malakand Campus, Malakand 23010, Pakistan
| | - Umme Habiba
- University Institute of Biochemistry and Biotechnology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
| | - Muhammad Noor Ul Amin
- University Institute of Biochemistry and Biotechnology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
| | - Sadia Saeed
- University Institute of Biochemistry and Biotechnology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
- Department of Clinical Molecular Biology, EpiGen, Institute of Clinical Medicine, University of Oslo, 0313 Oslo, Norway
| | - Ghazala Kaukab Raja
- University Institute of Biochemistry and Biotechnology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
| | - Pakeeza Arzoo Shaiq
- University Institute of Biochemistry and Biotechnology, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
| | - Zubair M Ahmed
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Maryland, Baltimore, MD 20742, USA
- Department of Biochemistry and Molecular Biology, School of Medicine, University of Maryland, Baltimore, MD 20742, USA
- Department of Ophthalmology and Visual Sciences, School of Medicine, University of Maryland, Baltimore, MD 20742, USA
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18
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Saif GAB, Alshammary AF, Ali Khan I. Evaluation of CAT Variants A-89T, C389T, and C419T in Patients with Vitiligo in the Saudi Population. Medicina (B Aires) 2023; 59:medicina59040708. [PMID: 37109666 PMCID: PMC10141203 DOI: 10.3390/medicina59040708] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/28/2023] [Accepted: 03/29/2023] [Indexed: 04/08/2023] Open
Abstract
Background and Objectives: Vitiligo is a chronic autoimmune and depigmentation disorder in humans that manifests as whitening lesions. Reactive oxygen species (ROS) are involved in cell damage. Catalase (CAT) is a well-known oxidative stress regulator and is primarily responsible for the catalytic decomposition of hydrogen peroxide into water and oxygen. Based on previous case-control and meta-analysis studies, we assessed the prevalence of three single-nucleotide polymorphisms (SNPs) of the CAT genes A-89T (rs7943316), C389T (rs769217) and C419T (rs11032709) in participants with vitiligo and healthy controls in the Saudi population. Materials and Methods: We recruited 152 participants with vitiligo and 159 healthy controls for A-89T, C389T, and C419T SNP genotyping studies using PCR and RFLP analysis. Additionally, we performed linkage disequilibrium and haplotype analyses between vitiligo cases and controls. Results: The rs7943316 and rs11032709 SNPs of the CAT genes showed a positive association with vitiligo for both heterozygous genotypes and dominant genetic models (TT + AT vs. AA in A-89T and TT + CT vs. CC in C389T), in the CAT gene. Linkage disequilibrium analysis revealed a moderate linkage between rs7943316 and rs11032709 SNPs in vitiligo cases and controls. Haplotype frequency estimation revealed a significant association (p = 0.003) among the three SNP alleles. Conclusions: The rs7943316 and rs11032709 SNPs of the CAT genes were strongly associated with susceptibility to vitiligo.
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Affiliation(s)
- Ghada A. Bin Saif
- Department of Dermatology, College of Medicine, King Saud University, Riyadh 11451, Saudi Arabia
| | - Amal F. Alshammary
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia
| | - Imran Ali Khan
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia
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19
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Lindblom J, Toro-Domínguez D, Carnero-Montoro E, Beretta L, Borghi MO, Castillo J, Enman Y, Mohan C, Alarcón-Riquelme ME, Barturen G, Parodis I. Distinct gene dysregulation patterns herald precision medicine potentiality in systemic lupus erythematosus. J Autoimmun 2023; 136:103025. [PMID: 36996699 DOI: 10.1016/j.jaut.2023.103025] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/07/2023] [Accepted: 03/03/2023] [Indexed: 03/30/2023]
Abstract
OBJECTIVES We aimed at investigating the whole-blood transcriptome, expression quantitative trait loci (eQTLs), and levels of selected serological markers in patients with SLE versus healthy controls (HC) to gain insight into pathogenesis and identify drug targets. METHODS We analyzed differentially expressed genes (DEGs) and dysregulated gene modules in a cohort of 350 SLE patients and 497 HC from the European PRECISESADS project (NTC02890121), split into a discovery (60%) and a replication (40%) set. Replicated DEGs qualified for eQTL, pathway enrichment, regulatory network, and druggability analysis. For validation purposes, a separate gene module analysis was performed in an independent cohort (GSE88887). RESULTS Analysis of 521 replicated DEGs identified multiple enriched interferon signaling pathways through Reactome. Gene module analysis yielded 18 replicated gene modules in SLE patients, including 11 gene modules that were validated in GSE88887. Three distinct gene module clusters were defined i.e., "interferon/plasma cells", "inflammation", and "lymphocyte signaling". Predominant downregulation of the lymphocyte signaling cluster denoted renal activity. By contrast, upregulation of interferon-related genes indicated hematological activity and vasculitis. Druggability analysis revealed several potential drugs interfering with dysregulated genes within the "interferon" and "PLK1 signaling events" modules. STAT1 was identified as the chief regulator in the most enriched signaling molecule network. Drugs annotated to 15 DEGs associated with cis-eQTLs included bortezomib for its ability to modulate CTSL activity. Belimumab was annotated to TNFSF13B (BAFF) and daratumumab was annotated to CD38 among the remaining replicated DEGs. CONCLUSIONS Modulation of interferon, STAT1, PLK1, B and plasma cell signatures showed promise as viable approaches to treat SLE, pointing to their importance in SLE pathogenesis.
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20
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Vitiligo, from Pathogenesis to Therapeutic Advances: State of the Art. Int J Mol Sci 2023; 24:ijms24054910. [PMID: 36902341 PMCID: PMC10003418 DOI: 10.3390/ijms24054910] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/26/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
Vitiligo is an acquired hypopigmentation of the skin due to a progressive selective loss of melanocytes; it has a prevalence of 1-2% and appears as rounded, well-demarcated white macules. The etiopathology of the disease has not been well defined, but multiple factors contribute to melanocyte loss: metabolic abnormalities, oxidative stress, inflammation, and autoimmunity. Therefore, a convergence theory was proposed that combines all existing theories into a comprehensive one in which several mechanisms contribute to the reduction of melanocyte viability. In addition, increasingly in-depth knowledge about the disease's pathogenetic processes has enabled the development of increasingly targeted therapeutic strategies with high efficacy and fewer side effects. The aim of this paper is, by conducting a narrative review of the literature, to analyze the pathogenesis of vitiligo and the most recent treatments available for this condition.
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21
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Sala-Gaston J, Costa-Sastre L, Pedrazza L, Martinez-Martinez A, Ventura F, Rosa JL. Regulation of MAPK Signaling Pathways by the Large HERC Ubiquitin Ligases. Int J Mol Sci 2023; 24:ijms24054906. [PMID: 36902336 PMCID: PMC10003351 DOI: 10.3390/ijms24054906] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/27/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
Protein ubiquitylation acts as a complex cell signaling mechanism since the formation of different mono- and polyubiquitin chains determines the substrate's fate in the cell. E3 ligases define the specificity of this reaction by catalyzing the attachment of ubiquitin to the substrate protein. Thus, they represent an important regulatory component of this process. Large HERC ubiquitin ligases belong to the HECT E3 protein family and comprise HERC1 and HERC2 proteins. The physiological relevance of the Large HERCs is illustrated by their involvement in different pathologies, with a notable implication in cancer and neurological diseases. Understanding how cell signaling is altered in these different pathologies is important for uncovering novel therapeutic targets. To this end, this review summarizes the recent advances in how the Large HERCs regulate the MAPK signaling pathways. In addition, we emphasize the potential therapeutic strategies that could be followed to ameliorate the alterations in MAPK signaling caused by Large HERC deficiencies, focusing on the use of specific inhibitors and proteolysis-targeting chimeras.
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22
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Vitiligo Treatments: Review of Current Therapeutic Modalities and JAK Inhibitors. Am J Clin Dermatol 2023; 24:165-186. [PMID: 36715849 DOI: 10.1007/s40257-022-00752-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2022] [Indexed: 01/31/2023]
Abstract
Vitiligo is a chronic autoimmune disease characterized by loss of pigment of the skin, affecting 0.5-2% of the population worldwide. It can have a significant impact on patients' quality of life. In recent years, there has been significant progress in our understanding of the pathogenesis of vitiligo. It is believed that vitiligo develops due to a complex combination of genetics, oxidative stress, inflammation, and environmental triggers. Conventional treatments include camouflage, topical corticosteroids, topical calcineurin inhibitors, oral corticosteroids, phototherapy, and surgical procedures, with the treatment regimen dependent on the patient's preferences and characteristics. With increased understanding of the importance of the Janus kinase (JAK)/signal transducer and activator of transcription (STAT) pathway in the pathogenesis of vitiligo, treatment has expanded to include the first US FDA-approved cream to repigment patients with vitiligo. This review summarizes our understanding of the major mechanisms involved in the pathogenesis of vitiligo and its most common available treatments.
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23
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Elkins KM, Garloff AT, Zeller CB. Additional predictions for forensic DNA phenotyping of externally visible characteristics using the ForenSeq and Imagen kits. J Forensic Sci 2023; 68:608-613. [PMID: 36762775 DOI: 10.1111/1556-4029.15215] [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: 11/01/2022] [Revised: 01/15/2023] [Accepted: 01/24/2023] [Indexed: 02/11/2023]
Abstract
Multiplex DNA typing methods using massively parallel sequencing can be used to predict externally visible characteristics (EVCs) in forensic DNA phenotyping through the analysis of single-nucleotide polymorphisms. The focus of EVC determination has focused on hair color, eye color, and skin tone as well as visible biogeographical ancestry features. In this study, we researched off-label applications beyond what is currently marketed by the manufacturer of the Verogen ForenSeq kit primer set B and Imagen primer set E SNP loci. We investigated additional EVC predictions by examining published genome wide sequencing studies and reported allele-specific gene expression and predictive values. We have identified 15 SNPs included in the ForenSeq kit panel and Imagen kits that have additional EVC prediction capabilities beyond what is published in the Verogen manuals. The additional EVCs that can be predicted include hair graying, ephelides hyperpigmented spots, dermatoheliosis, facial pigmented spots, standing height, pattern balding, helix-rolling ear morphology, hair shape, hair thickness, facial morphology, eyebrow thickness, sarcoidosis, obesity, vitiligo, and tanning propensity. The loci can be used to augment and refine phenotype predictions with software such as MetaHuman for missing persons, cold case, and historic case investigations.
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Affiliation(s)
- Kelly M Elkins
- TU Human Remains Identification Laboratory (THRIL), Chemistry Department, Forensic Science Program, Towson University, Towson, Maryland, USA
| | - Alexis T Garloff
- TU Human Remains Identification Laboratory (THRIL), Chemistry Department, Forensic Science Program, Towson University, Towson, Maryland, USA
| | - Cynthia B Zeller
- TU Human Remains Identification Laboratory (THRIL), Chemistry Department, Forensic Science Program, Towson University, Towson, Maryland, USA
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24
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Chen D, Xu Z, Cui J, Chen T. A mouse model of vitiligo based on endogenous auto-reactive CD8 + T cell targeting skin melanocyte. CELL REGENERATION (LONDON, ENGLAND) 2022; 11:31. [PMID: 36182982 PMCID: PMC9526765 DOI: 10.1186/s13619-022-00132-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 08/01/2022] [Indexed: 11/10/2022]
Abstract
Vitiligo is the most common human skin depigmenting disorder. It is mediated by endogenous autoreactive CD8 + T cells that destruct skin melanocytes. This disease has an estimated prevalence of 1% of the global population and currently has no cure. Animal models are indispensable tools for understanding vitiligo pathogenesis and for developing new therapies. Here, we describe a vitiligo mouse model which recapitulates key clinical features of vitiligo, including epidermis depigmentation, CD8 + T cell infiltration in skin, and melanocyte loss. To activate endogenous autoreactive cytotoxic CD8 + T cells targeting melanocytes, this model relies on transient inoculation of B16F10 melanoma cells and depletion of CD4 + regulatory T cells. At cellular level, epidermal CD8 + T cell infiltration and melanocyte loss start as early as Day 19 after treatment. Visually apparent epidermis depigmentation occurs 2 months later. This protocol can efficiently induce vitiligo in any C57BL/6 background mouse strain, using only commercially available reagents. This enables researchers to carry out in-depth in vivo vitiligo studies utilizing mouse genetics tools, and provides a powerful platform for drug discovery.
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Affiliation(s)
- Daoming Chen
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Zijian Xu
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Jun Cui
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China
| | - Ting Chen
- grid.410717.40000 0004 0644 5086National Institute of Biological Sciences, Beijing, China ,grid.12527.330000 0001 0662 3178Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, China
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25
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Dutta T, Mitra S, Saha A, Ganguly K, Pyne T, Sengupta M. A comprehensive meta-analysis and prioritization study to identify vitiligo associated coding and non-coding SNV candidates using web-based bioinformatics tools. Sci Rep 2022; 12:14543. [PMID: 36008553 PMCID: PMC9411560 DOI: 10.1038/s41598-022-18766-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 08/18/2022] [Indexed: 11/19/2022] Open
Abstract
Vitiligo is a prevalent depigmentation disorder affecting around 1% of the general population. So far, various Genome Wide Association Studies (GWAS) and Candidate Gene Association Studies (CGAS) have identified several single nucleotide variants (SNVs) as a risk factor for vitiligo. Nonetheless, little has been discerned regarding their direct functional significance to the disease pathogenesis. In this study, we did extensive data mining and downstream analysis using several experimentally validated datasets like GTEx Portal and web tools like rSNPBase, RegulomeDB, HaploReg and STRING to prioritize 13 SNVs from a set of 291SNVs that have been previously reported to be associated with vitiligo. We also prioritized their underlying/target genes and tried annotating their functional contribution to vitiligo pathogenesis. Our analysis revealed genes like FGFR10P, SUOX, CDK5RAP1 and RERE that have never been implicated in vitiligo previously to have strong potentials to contribute to the disease pathogenesis. The study is the first of its kind to prioritize and functionally annotate vitiligo-associated GWAS and CGAS SNVs and their underlying/target genes, based on functional data available in the public domain database.
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Affiliation(s)
- Tithi Dutta
- Department of Genetics, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Sayantan Mitra
- Department of Genetics, CVM University, Aribas, Aribas Campus, New Vallabh Vidyanagar, Anand, Gujarat, 388121, India
| | - Arpan Saha
- Department of Genetics, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Kausik Ganguly
- Department of Genetics, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Tushar Pyne
- Department of Genetics, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Mainak Sengupta
- Department of Genetics, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India.
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26
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Wang D, Min S, Lin X, Jiang G. Association Among MIF, IFIH1, and IL6 Gene Polymorphisms and Non-Segmental Vitiligo in a Chinese Han Population. Clin Cosmet Investig Dermatol 2022; 15:1597-1609. [PMID: 35983127 PMCID: PMC9380431 DOI: 10.2147/ccid.s369418] [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: 04/06/2022] [Accepted: 07/13/2022] [Indexed: 11/23/2022]
Abstract
Objective The aim of the present study was to investigate the association of single-nucleotide polymorphisms (SNPs) in the macrophage migration inhibiting factor (MIF), interferon-induced Helicase C domain 1 (IFIH1), interleukin-6 (IL6) genes, circulating levels with non-segmental vitiligo (NSV) susceptibility in the Chinese population, and to analyze the relationships between gene polymorphisms and clinical characteristics of vitiligo. Methods In this study, genotyping was conducted in 155 patients with NSV and 117 unaffected controls using polymerase chain reaction and snapshot technique. Serum concentrations were determined by ELISA kit. Results There were strong associations between IFIH1 H843R and IL6-572G/C polymorphisms and NSV susceptibility (p = 0.013; p = 0.009). In contrast to previous studies, we found no significant difference in the MIF-173G/C polymorphism between the two groups. In addition, the frequency of allelic distribution for MIF-173G/C in patients with active NSV was significantly higher than stable NSV (p = 0.011), and IFIH1 H843R with early-onset (≤ 20), active or family history of NSV was significantly higher than late-onset (> 20), stable or no family history of NSV (p = 0.033; p = 0.045; p = 0.039). Serum concentrations of MIF were higher in patients with active NSV, serum IFIH1 and IL6 concentrations were related to the presence of polymorphisms in patients with NSV (p = 0.009; p = 0.011). Conclusion Our results suggested that IFIH1 H843R and IL6-572G/C gene polymorphisms and expression levels are obviously correlated with the onset of NSV. MIF-173G/C allele and serum concentrations may be associated with active NSV, and IFIH1 H843R allele may be associated with youth, active or family history of NSV.
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Affiliation(s)
- Danfeng Wang
- Department of Dermatology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, People's Republic of China.,First Clinical Medical College, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Shuhui Min
- Department of Dermatology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, People's Republic of China.,First Clinical Medical College, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Xiao Lin
- Department of Dermatology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, People's Republic of China.,First Clinical Medical College, Xuzhou Medical University, Xuzhou, People's Republic of China
| | - Guan Jiang
- Department of Dermatology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, People's Republic of China.,First Clinical Medical College, Xuzhou Medical University, Xuzhou, People's Republic of China
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27
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Yu IS, Wee K, Williamson L, Titmuss E, An J, Naderi-Azad S, Metcalf C, Yip S, Horst B, Jones SJM, Paton K, Nelson BH, Marra M, Laskin JJ, Savage KJ. Exceptional response to combination ipilimumab and nivolumab in metastatic uveal melanoma: Insights from genomic analysis. Melanoma Res 2022; 32:278-285. [PMID: 35726793 DOI: 10.1097/cmr.0000000000000810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Uveal melanoma is the most common intraocular malignancy and has a poor prognosis compared to other melanoma subtypes with a median overall survival of 6-10 months. With immune checkpoint inhibitor therapy, either PD-1 inhibitor alone or combination ipilimumab/nivolumab (anti-CTLA-4/anti-PD-1), responses are rare and often not durable. We present a case report of a now 66-year-old woman with diffuse metastatic uveal melanoma previously treated with a combination of ipilimumab/nivolumab, followed by maintenance nivolumab. Almost complete resolution of all sites of metastatic disease was observed except for one liver metastasis which regressed partially on immunotherapy. Notably, the patient had a significantly elevated BMI and developed widespread vitiligo on treatment. Whole-genome and transcriptome analysis was performed on the residual liver biopsy and molecular markers that may have contributed to the exceptional response were investigated. Several alterations were observed in genes involved in T-cell responses. Estimates of tumour infiltrating immune cells indicated a high level of plasma cells compared to other uveal melanoma cases, a finding previously associated with indolent disease. The patient also carried several germline SNPs that may have contributed to her treatment response as well as widespread vitiligo. Whole-genome and transcriptome sequencing have provided insight into potential molecular underpinnings of an exceptional treatment response in a tumour type typically associated with poor prognosis. Immunological findings suggest a role for plasma cells in the tumour microenvironment. Elevated BMI and the development of vitiligo may be clinically relevant factors for predicting response to immune checkpoint inhibitor therapy, warranting further studies in patients with uveal melanoma.
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Affiliation(s)
- Irene S Yu
- Department of Medical Oncology, BC Cancer
| | - Kathleen Wee
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia
| | - Laura Williamson
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia
| | - Emma Titmuss
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia
| | - Jianghong An
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia
| | - Sheida Naderi-Azad
- Faculty of Medicine, University of Toronto, 1 King's College Cir, Toronto, Ontario
| | | | - Stephen Yip
- Department of Pathology and Laboratory Medicine
| | - Basil Horst
- Department of Pathology and Laboratory Medicine
| | - Steven J M Jones
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia
- Department of Medical Genetics
| | - Katherine Paton
- Department of Ophthalmology and Visual Sciences, University of British Columbia
| | - Brad H Nelson
- Department of Medical Genetics
- Deeley Research Centre, BC Cancer, Victoria, British Columbia, Canada
| | - Marco Marra
- Department of Medical Oncology, BC Cancer
- Department of Medical Genetics
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28
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Song J, Li M, Li C, Liu K, Zhu Y, Zhang H. Friend or foe: RIG- I like receptors and diseases. Autoimmun Rev 2022; 21:103161. [PMID: 35926770 PMCID: PMC9343065 DOI: 10.1016/j.autrev.2022.103161] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 07/29/2022] [Indexed: 12/22/2022]
Abstract
Retinoic acid-inducible gene I (RIG-I)-like receptors (RLRs), which are pivotal sensors of RNA virus invasions, mediate the transcriptional induction of genes encoding type I interferons (IFNs) and proinflammatory cytokines, successfully establishing host antiviral immune response. A few excellent reviews have elaborated on the structural biology of RLRs and the antiviral mechanisms of RLR activation. In this review, we give a basic understanding of RLR biology and summarize recent findings of how RLR signaling cascade is strictly controlled by host regulatory mechanisms, which include RLR-interacting proteins, post-translational modifications and microRNAs (miRNAs). Furthermore, we pay particular attention to the relationship between RLRs and diseases, especially how RLRs participate in SARS-CoV-2, malaria or bacterial infections, how single-nucleotide polymorphisms (SNPs) or mutations in RLRs and antibodies against RLRs lead to autoinflammatory diseases and autoimmune diseases, and how RLRs are involved in anti-tumor immunity. These findings will provide insights and guidance for antiviral and immunomodulatory therapies targeting RLRs.
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Affiliation(s)
- Jie Song
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China
| | - Muyuan Li
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha City, Hunan Province, China
| | - Caiyan Li
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China
| | - Ke Liu
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China
| | - Yaxi Zhu
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China.
| | - Huali Zhang
- Department of Rheumatology, Xiangya Hospital, Central South University, Changsha City, Hunan Province, China; Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha City, Hunan Province, China; Sepsis Translational Medicine Key Lab of Hunan Province, Central South University, Changsha City, Hunan Province, China.
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29
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Hlača N, Žagar T, Kaštelan M, Brajac I, Prpić-Massari L. Current Concepts of Vitiligo Immunopathogenesis. Biomedicines 2022; 10:biomedicines10071639. [PMID: 35884944 PMCID: PMC9313271 DOI: 10.3390/biomedicines10071639] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/20/2022] [Accepted: 07/04/2022] [Indexed: 12/11/2022] Open
Abstract
Vitiligo is an acquired immune-mediated disorder of pigmentation clinically characterized by well-defined depigmented or chalk-white macules and patches on the skin. The prevalence of vitiligo varies by geographical area, affecting 0.5% to 2% of the population. The disease imposes a significant psychological burden due to its major impact on patients’ social and emotional aspects of life. Given its autoimmune background, vitiligo is frequently associated with other autoimmune diseases or immune-mediated diseases. Vitiligo is a multifaceted disorder that involves both genetic predisposition and environmental triggers. In recent years, major predisposing genetic loci for the development of vitiligo have been discovered. The current findings emphasize the critical role of immune cells and their mediators in the immunopathogenesis of vitiligo. Oxidative-stress-mediated activation of innate immunity cells such as dendritic cells, natural killer, and ILC-1 cells is thought to be a key event in the early onset of vitiligo. Innate immunity cells serve as a bridge to adaptive immunity cells including T helper 1 cells, cytotoxic T cells and resident memory T cells. IFN-γ is the primary cytokine mediator that activates the JAK/STAT pathway, causing keratinocytes to produce the key chemokines CXCL9 and CXCL10. Complex interactions between immune and non-immune cells finally result in apoptosis of melanocytes. This paper summarizes current knowledge on the etiological and genetic factors that contribute to vitiligo, with a focus on immunopathogenesis and the key cellular and cytokine players in the disease’s inflammatory pathways.
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30
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Marchioro HZ, Castro CCSD, Fava VM, Sakiyama PH, Dellatorre G, Miot HA. Update on the pathogenesis of vitiligo. An Bras Dermatol 2022; 97:478-490. [PMID: 35643735 PMCID: PMC9263675 DOI: 10.1016/j.abd.2021.09.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/15/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022] Open
Abstract
Vitiligo is a complex disease whose pathogenesis results from the interaction of genetic components, metabolic factors linked to cellular oxidative stress, melanocyte adhesion to the epithelium, and immunity (innate and adaptive), which culminate in aggression against melanocytes. In vitiligo, melanocytes are more sensitive to oxidative damage, leading to the increased expression of proinflammatory proteins such as HSP70. The lower expression of epithelial adhesion molecules, such as DDR1 and E-cadherin, facilitates damage to melanocytes and exposure of antigens that favor autoimmunity. Activation of the type 1-IFN pathway perpetuates the direct action of CD8+ cells against melanocytes, facilitated by regulatory T-cell dysfunction. The identification of several genes involved in these processes sets the stage for disease development and maintenance. However, the relationship of vitiligo with environmental factors, psychological stress, comorbidities, and the elements that define individual susceptibility to the disease are a challenge to the integration of theories related to its pathogenesis.
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31
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Xiao H, Dong Y, Xiao L, Liang X, Zheng J. Identification of key gene contributing to vitiligo by immune infiltration. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2022; 15:157-167. [PMID: 35535201 PMCID: PMC9077110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 02/26/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND A deeper understanding of new prognostic and diagnostic biomarkers for vitiligo, an autoimmune disease, is needed. The purpose of this study is to identify the underlying long noncoding RNAs (lncRNAs) and immune infiltration related to the cause of vitiligo. METHODS The microarray data (GSE75819) were available to be downloaded from NCBI-GEO. Eight hub genes were identified from the Protein-protein interaction (PPI) network by the dissection of differentially expressed genes (DEG), Kyoto Gene and Genomic Encyclopedia (KEGG) expansion pathway, and Gene Ontology (GO). Further analysis based on the immune infiltration as well as the correlation between DEGs and immune cells was performed. Our conclusions were verified by using the GSE534 eventually. RESULTS According to our analysis, we obtained a total of 666 DEGs and 8 hub genes that include ECT2, CCT8, VRK1, UQCRH, EBNA1BP2, CRY2, IFIH1, and BCCIP, which may play an important role in vitiligo. Moreover, the immune infiltration profiles varied significantly between normal and vitiligo tissues. Compared with normal tissues, vitiligo tissues contained a greater proportion of mast cells (P<0.05). The analysis revealed that T cells regulatory (Tregs) have a negative correlation with the VRK1 expression (R=-0:77, P<0.001), whereas the mast cells resting have a positive correlation with the VRK1 expression (R=0:72, P<0.001) in vitiligo. CONCLUSION The gene expression profile of vitiligo was realized by a bioinformatics method. The expressions of 8 hub genes and 22 immune cells were found, as the same as CRY2 and VRK1 have a special correlation with immune cells, which may be a significant cause of the pathogenesis of vitiligo. This provides a new idea for the diagnosis and treatment of vitiligo.
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Affiliation(s)
- Hefang Xiao
- Department of Orthopedics, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, School of Clinical Medicine, Zhengzhou UniversityNo. 7 Weiwu Road, Jinshui District, Zhengzhou, Henan, China
| | - Yonghui Dong
- Department of Orthopedics, Henan Provincial People’s HospitalZhengzhou, Henan, China
| | - Likang Xiao
- Department of Orthopedics, Henan Provincial People’s HospitalZhengzhou, Henan, China
| | - Xiaming Liang
- Department of Orthopedics, Henan Provincial People’s HospitalZhengzhou, Henan, China
| | - Jia Zheng
- Department of Orthopedics, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, School of Clinical Medicine, Zhengzhou UniversityNo. 7 Weiwu Road, Jinshui District, Zhengzhou, Henan, China
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Strippel C, Herrera-Rivero M, Wendorff M, Tietz AK, Degenhardt F, Witten A, Schroeter C, Nelke C, Golombeck KS, Madlener M, Rüber T, Ernst L, Racz A, Baumgartner T, Widman G, Doppler K, Thaler F, Siebenbrodt K, Dik A, Kerin C, Räuber S, Gallus M, Kovac S, Grauer OM, Grimm A, Prüss H, Wickel J, Geis C, Lewerenz J, Goebels N, Ringelstein M, Menge T, Tackenberg B, Kellinghaus C, Bien CG, Kraft A, Zettl U, Ismail FS, Ayzenberg I, Urbanek C, Sühs KW, Tauber SC, Mues S, Körtvélyessy P, Markewitz R, Paliantonis A, Elger CE, Surges R, Sommer C, Kümpfel T, Gross CC, Lerche H, Wellmer J, Quesada CM, Then Bergh F, Wandinger KP, Becker AJ, Kunz WS, Meyer zu Hörste G, Malter MP, Rosenow F, Wiendl H, Kuhlenbäumer G, Leypoldt F, Lieb W, Franke A, Meuth SG, Stoll M, Melzer N. A genome-wide association study in autoimmune neurological syndromes with anti-GAD65 autoantibodies. Brain 2022; 146:977-990. [PMID: 35348614 PMCID: PMC9976967 DOI: 10.1093/brain/awac119] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 02/11/2022] [Accepted: 03/13/2022] [Indexed: 11/15/2022] Open
Abstract
Autoimmune neurological syndromes (AINS) with autoantibodies against the 65 kDa isoform of the glutamic acid decarboxylase (GAD65) present with limbic encephalitis, including temporal lobe seizures or epilepsy, cerebellitis with ataxia, and stiff-person-syndrome or overlap forms. Anti-GAD65 autoantibodies are also detected in autoimmune diabetes mellitus, which has a strong genetic susceptibility conferred by human leukocyte antigen (HLA) and non-HLA genomic regions. We investigated the genetic predisposition in patients with anti-GAD65 AINS. We performed a genome-wide association study (GWAS) and an association analysis of the HLA region in a large German cohort of 1214 individuals. These included 167 patients with anti-GAD65 AINS, recruited by the German Network for Research on Autoimmune Encephalitis (GENERATE), and 1047 individuals without neurological or endocrine disease as population-based controls. Predictions of protein expression changes based on GWAS findings were further explored and validated in the CSF proteome of a virtually independent cohort of 10 patients with GAD65-AINS and 10 controls. Our GWAS identified 16 genome-wide significant (P < 5 × 10-8) loci for the susceptibility to anti-GAD65 AINS. The top variant, rs2535288 [P = 4.42 × 10-16, odds ratio (OR) = 0.26, 95% confidence interval (CI) = 0.187-0.358], localized to an intergenic segment in the middle of the HLA class I region. The great majority of variants in these loci (>90%) mapped to non-coding regions of the genome. Over 40% of the variants have known regulatory functions on the expression of 48 genes in disease relevant cells and tissues, mainly CD4+ T cells and the cerebral cortex. The annotation of epigenomic marks suggested specificity for neural and immune cells. A network analysis of the implicated protein-coding genes highlighted the role of protein kinase C beta (PRKCB) and identified an enrichment of numerous biological pathways participating in immunity and neural function. Analysis of the classical HLA alleles and haplotypes showed no genome-wide significant associations. The strongest associations were found for the DQA1*03:01-DQB1*03:02-DRB1*04:01HLA haplotype (P = 4.39 × 10-4, OR = 2.5, 95%CI = 1.499-4.157) and DRB1*04:01 allele (P = 8.3 × 10-5, OR = 2.4, 95%CI = 1.548-3.682) identified in our cohort. As predicted, the CSF proteome showed differential levels of five proteins (HLA-A/B, C4A, ATG4D and NEO1) of expression quantitative trait loci genes from our GWAS in the CSF proteome of anti-GAD65 AINS. These findings suggest a strong genetic predisposition with direct functional implications for immunity and neural function in anti-GAD65 AINS, mainly conferred by genomic regions outside the classical HLA alleles.
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Affiliation(s)
| | | | - Mareike Wendorff
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Anja K Tietz
- Department of Neurology, University of Kiel, Kiel, Germany
| | - Frauke Degenhardt
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Anika Witten
- Department of Genetic Epidemiology, Institute of Human Genetics, University of Münster, Münster, Germany
| | - Christina Schroeter
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Christopher Nelke
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Kristin S Golombeck
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Marie Madlener
- Department of Neurology, University of Cologne, Cologne, Germany
| | - Theodor Rüber
- Department of Epileptology, University of Bonn, Bonn, Germany,Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt, and LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Leon Ernst
- Department of Epileptology, University of Bonn, Bonn, Germany
| | - Attila Racz
- Department of Epileptology, University of Bonn, Bonn, Germany
| | | | - Guido Widman
- Department of Epileptology, University of Bonn, Bonn, Germany
| | - Kathrin Doppler
- Department of Neurology, University of Würzburg, Würzburg, Germany
| | - Franziska Thaler
- Institute of Clinical Neuroimmunology, University Hospital, Ludwig-Maximilians-Universität Munich, Munich, Germany,Biomedical Center (BMC), Medical Faculty, Ludwig-Maximilians-Universität Munich, Martinsried, Germany
| | - Kai Siebenbrodt
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt, and LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Andre Dik
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Constanze Kerin
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Saskia Räuber
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany,Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Marco Gallus
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Stjepana Kovac
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Oliver M Grauer
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Alexander Grimm
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Harald Prüss
- Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Jonathan Wickel
- Section of Translational Neuroimmunology, Department of Neurology, Jena University Hospital, Jena, Germany
| | - Christian Geis
- Section of Translational Neuroimmunology, Department of Neurology, Jena University Hospital, Jena, Germany
| | - Jan Lewerenz
- Department of Neurology, Ulm University, Ulm, Germany
| | - Norbert Goebels
- Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Marius Ringelstein
- Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany,Center for Neurology and Neuropsychiatry, LVR Klinikum, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Til Menge
- Department of Neurology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany,Center for Neurology and Neuropsychiatry, LVR Klinikum, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Björn Tackenberg
- Department of Neurology, University of Marburg/Gießen, Marburg, Germany
| | | | - Christian G Bien
- Department of Epileptology (Krankenhaus Mara), Bielefeld University, Medical School, Campus Bielefeld-Bethel, Bielefeld, Germany
| | | | - Uwe Zettl
- Department of Neurology, University of Rostock, Rostock, Germany
| | - Fatme Seval Ismail
- Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, Bochum, Germany
| | - Ilya Ayzenberg
- Department of Neurology, I.M. Sechenov First Moscow State Medical University, Moscow, Russia,Department of Neurology, St Josefs Krankenhaus Bochum, Ruhr University Bochum, Bochum, Germany
| | - Christian Urbanek
- Department of Neurology, Ludwigshafen Hospital, Ludwigshafen, Germany
| | - Kurt-Wolfram Sühs
- Department of Neurology, University Hospital, MHH, Hannover, Germany
| | - Simone C Tauber
- Department of Neurology, University Hospital RWTH Aachen, Aachen, Germany
| | - Sigrid Mues
- Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, Bochum, Germany,Department of Neurology, University Hospital Dresden, Dresden, Germany
| | - Peter Körtvélyessy
- Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany,Department of Neurology, University Hospital Magdeburg, Magdeburg, Germany
| | - Robert Markewitz
- Neuroimmunology, Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Kiel/Lübeck, Germany
| | | | | | - Rainer Surges
- Department of Epileptology, University of Bonn, Bonn, Germany
| | - Claudia Sommer
- Department of Neurology, University of Würzburg, Würzburg, Germany
| | - Tania Kümpfel
- Institute of Clinical Neuroimmunology, University Hospital, Ludwig-Maximilians-Universität Munich, Munich, Germany,Biomedical Center (BMC), Medical Faculty, Ludwig-Maximilians-Universität Munich, Martinsried, Germany
| | - Catharina C Gross
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Holger Lerche
- Department of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Jörg Wellmer
- Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, Bochum, Germany
| | - Carlos M Quesada
- Department of Neurology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | | | - Klaus-Peter Wandinger
- Neuroimmunology, Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Kiel/Lübeck, Germany
| | - Albert J Becker
- Section of Translational Epileptology, Institute of Neuropathology, University of Bonn, Bonn, Germany
| | - Wolfram S Kunz
- Department of Epileptology, University of Bonn, Bonn, Germany
| | - Gerd Meyer zu Hörste
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Michael P Malter
- Department of Neurology, University of Cologne, Cologne, Germany
| | - Felix Rosenow
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt, and LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Heinz Wiendl
- Department of Neurology with Institute of Translational Neurology, University of Münster, Münster, Germany
| | | | - Frank Leypoldt
- Department of Neurology, University of Kiel, Kiel, Germany,Neuroimmunology, Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Kiel/Lübeck, Germany
| | - Wolfgang Lieb
- Institute of Epidemiology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | | | - Monika Stoll
- Correspondence may also be addressed to: Monika Stoll E-mail:
| | - Nico Melzer
- Correspondence to: Nico Melzer Department of Neurology, Medical Faculty, Heinrich-Heine University of Düsseldorf Moorenstraße 5, 40225 Düsseldorf, Germany E-mail:
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The Genetics of Pediatric Cutaneous Autoimmunity: The Sister Diseases Vitiligo and Alopecia Areata. Clin Dermatol 2022; 40:363-373. [DOI: 10.1016/j.clindermatol.2022.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Faraj S, Kemp EH, Gawkrodger DJ. Patho-immunological mechanisms of vitiligo: the role of the innate and adaptive immunities and environmental stress factors. Clin Exp Immunol 2022; 207:27-43. [PMID: 35020865 PMCID: PMC8802175 DOI: 10.1093/cei/uxab002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 10/04/2021] [Accepted: 10/15/2021] [Indexed: 12/17/2022] Open
Abstract
Epidermal melanocyte loss in vitiligo, triggered by stresses ranging from trauma to emotional stress, chemical exposure or metabolite imbalance, to the unknown, can stimulate oxidative stress in pigment cells, which secrete damage-associated molecular patterns that then initiate innate immune responses. Antigen presentation to melanocytes leads to stimulation of autoreactive T-cell responses, with further targeting of pigment cells. Studies show a pathogenic basis for cellular stress, innate immune responses and adaptive immunity in vitiligo. Improved understanding of the aetiological mechanisms in vitiligo has already resulted in successful use of the Jak inhibitors in vitiligo. In this review, we outline the current understanding of the pathological mechanisms in vitiligo and locate loci to which therapeutic attack might be directed.
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Affiliation(s)
- Safa Faraj
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK
| | | | - David John Gawkrodger
- Department of Infection, Immunology and Cardiovascular Disease, University of Sheffield, Sheffield, UK
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Cheng JY, Stern AJ, Racimo F, Nielsen R. Detecting Selection in Multiple Populations by Modeling Ancestral Admixture Components. Mol Biol Evol 2022; 39:msab294. [PMID: 34626111 PMCID: PMC8763095 DOI: 10.1093/molbev/msab294] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
One of the most powerful and commonly used approaches for detecting local adaptation in the genome is the identification of extreme allele frequency differences between populations. In this article, we present a new maximum likelihood method for finding regions under positive selection. It is based on a Gaussian approximation to allele frequency changes and it incorporates admixture between populations. The method can analyze multiple populations simultaneously and retains power to detect selection signatures specific to ancestry components that are not representative of any extant populations. Using simulated data, we compare our method to related approaches, and show that it is orders of magnitude faster than the state-of-the-art, while retaining similar or higher power for most simulation scenarios. We also apply it to human genomic data and identify loci with extreme genetic differentiation between major geographic groups. Many of the genes identified are previously known selected loci relating to hair pigmentation and morphology, skin, and eye pigmentation. We also identify new candidate regions, including various selected loci in the Native American component of admixed Mexican-Americans. These involve diverse biological functions, such as immunity, fat distribution, food intake, vision, and hair development.
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Affiliation(s)
- Jade Yu Cheng
- Lundbeck GeoGenetics Centre, Globe Institute, University of Copenhagen, Copenhagen, Denmark
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Aaron J Stern
- Graduate Group in Computational Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Fernando Racimo
- Lundbeck GeoGenetics Centre, Globe Institute, University of Copenhagen, Copenhagen, Denmark
| | - Rasmus Nielsen
- Lundbeck GeoGenetics Centre, Globe Institute, University of Copenhagen, Copenhagen, Denmark
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, USA
- Department of Statistics, University of California, Berkeley, Berkeley, CA, USA
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36
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Dwivedi M, Laddha NC, Begum R. The Immunogenetics of Vitiligo: An Approach Toward Revealing the Secret of Depigmentation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1367:61-103. [PMID: 35286692 DOI: 10.1007/978-3-030-92616-8_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Vitiligo is a hypomelanotic skin disease and considered to be of autoimmune origin due to breaching of immunological self-tolerance, resulting in inappropriate immune responses against melanocytes. The development of vitiligo includes a strong heritable component. Different strategies ranging from linkage studies to genome-wide association studies are used to explore the genetic factors responsible for the disease. Several vitiligo loci containing the respective genes have been identified which contribute to vitiligo and genetic variants for some of the genes are still unknown. These genes include mainly the proteins that play a role in immune regulation and a few other genes important for apoptosis and regulation of melanocyte functions. Despite the available data on genetic variants and risk alleles which influence the biological processes, only few immunological pathways have been found responsible for all ranges of severity and clinical manifestations of vitiligo. However, studies have concluded that vitiligo is of autoimmune origin and manifests due to complex interactions in immune components and their inappropriate response toward melanocytes. The genes involved in the immune regulation and processing the melanocytes antigen and its presentation can serve as effective immune-therapeutics that can target specific immunological pathways involved in vitiligo. This chapter highlights those immune-regulatory genes involved in vitiligo susceptibility and loci identified to date and their implications in vitiligo pathogenesis.
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Affiliation(s)
- Mitesh Dwivedi
- C. G. Bhakta Institute of Biotechnology, Uka Tarsadia University, Tarsadi, Surat, 394350, Gujarat, India.
| | - Naresh C Laddha
- In Vitro Specialty Lab Pvt. Ltd, 205-210, Golden Triangle, Navrangpura, Ahmedabad, 380009, Gujarat, India
| | - Rasheedunnisa Begum
- Department of Biochemistry, The Maharaja Sayajirao University of Baroda, Vadodara, 390002, Gujarat, India
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Nordengen K, Pålhaugen L, Bettella F, Bahrami S, Selnes P, Jarholm J, Athanasiu L, Shadrin A, Andreassen OA, Fladby T. Phenotype‐informed polygenic risk scores are associated with worse outcome in individuals at risk of Alzheimer's disease. ALZHEIMER'S & DEMENTIA: DIAGNOSIS, ASSESSMENT & DISEASE MONITORING 2022; 14:e12350. [PMID: 35991219 PMCID: PMC9376972 DOI: 10.1002/dad2.12350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 06/30/2022] [Accepted: 07/07/2022] [Indexed: 11/11/2022]
Abstract
Introduction Patients with predementia Alzheimer's disease (AD) and at‐risk subjects are targets for promising disease‐modifying treatments, and improved polygenic risk scores (PRSs) could improve early‐stage case selection. Methods Phenotype‐informed PRSs were developed by selecting AD‐associated variants conditional on relevant inflammatory or cardiovascular traits. The primary outcome was longitudinal changes in measures of AD pathology, namely development of pathological amyloid deposition, medial temporal lobe atrophy, and cognitive decline in a prospective cohort study including 394 adults without AD dementia. Results High‐risk groups defined by phenotype‐informed AD PRSs had significantly steeper volume decline in medial temporal cortices, and the high‐risk group defined by the cardiovascular‐informed AD PRS had significantly increased hazard ratio of pathological amyloid deposition, compared to low‐risk groups. Discussion AD PRSs informed by inflammatory disorders or cardiovascular risk factors and diseases are associated with development of AD pathology markers and may improve identification of subjects at risk for progression of AD.
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Affiliation(s)
- Kaja Nordengen
- Department of Neurology Akershus University Hospital Lørenskog Norway
- Institute of Clinical Medicine University of Oslo Oslo Norway
| | - Lene Pålhaugen
- Department of Neurology Akershus University Hospital Lørenskog Norway
- Institute of Clinical Medicine University of Oslo Oslo Norway
| | - Francesco Bettella
- Norwegian Centre for Mental Disorders Research (NORMENT) Division of Mental Health and Addiction Oslo University Hospital Oslo Norway
| | - Shahram Bahrami
- Norwegian Centre for Mental Disorders Research (NORMENT) Division of Mental Health and Addiction Oslo University Hospital Oslo Norway
| | - Per Selnes
- Department of Neurology Akershus University Hospital Lørenskog Norway
- Institute of Clinical Medicine University of Oslo Oslo Norway
| | - Jonas Jarholm
- Department of Neurology Akershus University Hospital Lørenskog Norway
- Institute of Clinical Medicine University of Oslo Oslo Norway
| | - Lavinia Athanasiu
- Norwegian Centre for Mental Disorders Research (NORMENT) Division of Mental Health and Addiction Oslo University Hospital Oslo Norway
| | - Alexey Shadrin
- Norwegian Centre for Mental Disorders Research (NORMENT) Division of Mental Health and Addiction Oslo University Hospital Oslo Norway
| | - Ole A. Andreassen
- Institute of Clinical Medicine University of Oslo Oslo Norway
- Norwegian Centre for Mental Disorders Research (NORMENT) Division of Mental Health and Addiction Oslo University Hospital Oslo Norway
| | - Tormod Fladby
- Department of Neurology Akershus University Hospital Lørenskog Norway
- Institute of Clinical Medicine University of Oslo Oslo Norway
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Fichna M, Żurawek M, Słomiński B, Sumińska M, Czarnywojtek A, Rozwadowska N, Fichna P, Myśliwiec M, Ruchała M. Polymorphism in BACH2 gene is a marker of polyglandular autoimmunity. Endocrine 2021; 74:72-79. [PMID: 33966174 PMCID: PMC8440266 DOI: 10.1007/s12020-021-02743-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 04/23/2021] [Indexed: 11/06/2022]
Abstract
PURPOSE Genetically predisposed individuals may develop several autoimmune diseases-autoimmune polyendocrine syndromes (APS). APS types 2-4, are complex disorders, which combine various organ-specific autoimmune conditions. Recent reports support the considerable role of the BACH2 gene in immune cell differentiation and shifting the T-cell balance towards regulatory T-cells. BACH2 polymorphisms are associated with autoimmune disorders, including Addison's disease (AD), Graves' disease (GD), and probably type 1 diabetes (T1D). Our study was aimed to investigate the BACH2 variant, rs3757247, in endocrine autoimmunity in the Polish population. METHODS The analysis comprised 346 individuals with APS, 387 with T1D only, and 568 controls. Genotyping was performed using TaqMan chemistry. RESULTS APS type 2 was found in 219 individuals, type 3 in 102, and type 4 in 25 subjects. Overall, AD was diagnosed in 244 subjects, Hashimoto's thyroiditis-in 238, T1D-in 127, GD-in 58, vitiligo and chronic gastritis each in 40 patients, celiac disease-in 28, premature menopause in 18, and alopecia in 4 patients. Minor T allele at rs3757247 was found in 56.4% APS vs. 44.1% control alleles (OR 1.59; 95%CI: 1.30-1.95, p < 0.0001). The distribution of genotypes revealed excess TT homozygotes in the APS cohort (33.2 vs. 20.1% in controls, p < 0.0001). The frequencies of rs3757247 alleles and genotypes in T1D patients did not present significant differences vs. controls (p-values > 0.05). CONCLUSIONS These results provide evidence of the association between BACH2 polymorphism and polyglandular autoimmunity. Since carriers of rs3757247 display increased risk for additional autoimmune conditions, this variant could identify individuals prone to develop APS.
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Affiliation(s)
- Marta Fichna
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland.
| | - Magdalena Żurawek
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | - Bartosz Słomiński
- Department of Medical Immunology, Faculty of Medicine, Medical University of Gdansk, Gdansk, Poland
| | - Marta Sumińska
- Department of Paediatric Diabetes and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | - Agata Czarnywojtek
- Department of Pharmacology, Poznan University of Medical Sciences, Poznan, Poland
| | | | - Piotr Fichna
- Department of Paediatric Diabetes and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | - Małgorzata Myśliwiec
- Department of Paediatrics, Diabetology and Endocrinology, Faculty of Medicine, Medical University of Gdansk, Gdansk, Poland
| | - Marek Ruchała
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
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Khaitan BK, Sindhuja T. Autoimmunity in vitiligo: Therapeutic implications and opportunities. Autoimmun Rev 2021; 21:102932. [PMID: 34506987 DOI: 10.1016/j.autrev.2021.102932] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/02/2021] [Accepted: 09/04/2021] [Indexed: 12/13/2022]
Abstract
Vitiligo is an acquired chronic pigmentary disorder affecting the melanocytes, mainly in the skin and mucosae. It occurs due to the dynamic interaction between genetic and environmental factors leading to autoimmune destruction of melanocytes. Defects in melanocyte adhesion and increased oxidative stress further augment the immune response in vitiligo. It is a cosmetically disfiguring condition with a substantial psychological burden. Its autoimmune nature with resultant chronicity, variable responses to therapeutic modalities, and frequent recurrences have further diminished the quality of life. Hence, treatment should aim to provide more extended remission periods, prevent recurrences, provide good cosmetic outcomes and ensure patient satisfaction. These treatment goals seem plausible with the recent progress in our understanding of the complex pathogenic mechanisms underlying vitiligo at a molecular and genetic level. We provide a literature review of the pathogenic mechanisms and the therapies targeting these mechanisms.
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Affiliation(s)
- Binod K Khaitan
- Department of Dermatology and Venereology, All India Institute of Medical Sciences, New Delhi, India.
| | - Tekumalla Sindhuja
- Department of Dermatology and Venereology, All India Institute of Medical Sciences, New Delhi, India
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40
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Gosu V, Sasidharan S, Saudagar P, Lee HK, Shin D. Computational Insights into the Structural Dynamics of MDA5 Variants Associated with Aicardi-Goutières Syndrome and Singleton-Merten Syndrome. Biomolecules 2021; 11:biom11081251. [PMID: 34439917 PMCID: PMC8393256 DOI: 10.3390/biom11081251] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 11/26/2022] Open
Abstract
Melanoma differentiation-associated protein 5 (MDA5) is a crucial RIG-I-like receptor RNA helicase enzyme encoded by IFIH1 in humans. Single nucleotide polymorphisms in the IFIH1 results in fatal genetic disorders such as Aicardi–Goutières syndrome and Singleton–Merten syndrome, and in increased risk of type I diabetes in humans. In this study, we chose four different amino acid substitutions of the MDA5 protein responsible for genetic disorders: MDA5L372F, MDA5A452T, MDA5R779H, and MDA5R822Q and analyzed their structural and functional relationships using molecular dynamic simulations. Our results suggest that the mutated complexes are relatively more stable than the wild-type MDA5. The radius of gyration, interaction energies, and intra-hydrogen bond analysis indicated the stability of mutated complexes over the wild type, especially MDA5L372F and MDA5R822Q. The dominant motions exhibited by the wild-type and mutant complexes varied significantly. Moreover, the betweenness centrality of the wild-type and mutant complexes showed shared residues for intra-signal propagation. The observed results indicate that the mutations lead to a gain of function, as reported in previous studies, due to increased interaction energies and stability between RNA and MDA5 in mutated complexes. These findings are expected to deepen our understanding of MDA5 variants and may assist in the development of relevant therapeutics against the disorders.
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Affiliation(s)
- Vijayakumar Gosu
- Department of Animal Biotechnology, Jeonbuk National University, Jeonju 54896, Korea;
| | - Santanu Sasidharan
- Department of Biotechnology, National Institute of Technology, Warangal 506004, Telangana, India; (S.S.); (P.S.)
| | - Prakash Saudagar
- Department of Biotechnology, National Institute of Technology, Warangal 506004, Telangana, India; (S.S.); (P.S.)
| | - Hak-Kyo Lee
- Department of Animal Biotechnology, Jeonbuk National University, Jeonju 54896, Korea;
- Department of Agricultural Convergence Technology, Jeonbuk National University, Jeonju 54896, Korea
- Correspondence: (H.L.); (D.S.)
| | - Donghyun Shin
- Department of Agricultural Convergence Technology, Jeonbuk National University, Jeonju 54896, Korea
- Correspondence: (H.L.); (D.S.)
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Tang X, Cheng H, Cheng L, Liang B, Chen M, Zheng X, Xiao F. An in-depth analysis reveals two new genetic variants on 22q11.2 associated with vitiligo in the Chinese Han population. Mol Biol Rep 2021; 48:5955-5964. [PMID: 34350550 DOI: 10.1007/s11033-021-06597-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 07/25/2021] [Indexed: 12/21/2022]
Abstract
BACKGROUND Vitiligo is a complex disease in which patchy depigmentation is the result of an autoimmune-induced loss of melanocytes in affected regions. On the basis of a genome-wide linkage analysis of vitiligo in the Chinese Han population, we previously showed significant evidence of a linkage between 22q12 and vitiligo. Our aim in the current study was to identify vitiligo susceptibility variants within an expanded region of the 22q12 locus. METHODS AND RESULTS An in-depth analysis of the expanded region of the 22q12 locus was performed by imputation using a large GWAS dataset consisting of 1117 cases and 1701 controls. Eight nominal SNPs were selected and genotyped in an independent cohort of Chinese Han individuals (2069 patients and 1370 control individuals) by using the Sequenom MassArray iPLEX1 system. The data were analyzed with PLINK 1.07 software. The C allele of rs730669 located in ZDHHC8/RTN4R showed a strong association with vitiligo (P = 3.25 × 10-8, OR = 0.81). The C allele of rs4820338 located in VPREB1 and the A allele of rs2051582 (a SNP reported in our previous study) located in IL2RB showed a suggestive association with vitiligo (P = 1.04 × 10-5, OR = 0.86; P = 1.78 × 10-6, OR = 1.27). The three identified SNPs showed independent associations with vitiligo in a conditional logistic regression analysis (all P < 1.0 × 10-5; all D' < 0.05 and r2 < 1.0 × 10-4). CONCLUSIONS The study reveals that two novel variants rs730669 (ZDHHC8/RTN4R) and rs4820338 (VPREB1) on 22q11.2 might confer susceptibility to vitiligo and affect disease subphenotypes. The presence of multiple independent variants emphasizes their important roles in the genetic pathogenesis of disease.
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Affiliation(s)
- Xianfa Tang
- Department of Dermatology and Institute of Dermatology at No. 1 Hospital, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
- Key Laboratory of Dermatology, Ministry of Education, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, China
| | - Hui Cheng
- Department of Dermatology and Institute of Dermatology at No. 1 Hospital, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
- Key Laboratory of Dermatology, Ministry of Education, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, China
| | - Lu Cheng
- Department of Dermatology and Institute of Dermatology at No. 1 Hospital, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
- Key Laboratory of Dermatology, Ministry of Education, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, China
| | - Bo Liang
- Department of Dermatology and Institute of Dermatology at No. 1 Hospital, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
- Key Laboratory of Dermatology, Ministry of Education, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, China
| | - Mengyun Chen
- Department of Dermatology and Institute of Dermatology at No. 1 Hospital, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
- Key Laboratory of Dermatology, Ministry of Education, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, China
| | - Xiaodong Zheng
- Department of Dermatology and Institute of Dermatology at No. 1 Hospital, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
- Key Laboratory of Dermatology, Ministry of Education, Hefei, China
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, China
| | - Fengli Xiao
- Department of Dermatology and Institute of Dermatology at No. 1 Hospital, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China.
- Key Laboratory of Dermatology, Ministry of Education, Hefei, China.
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei, China.
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42
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Yao Y, Shen Y, Shao H, Liu Y, Ji Y, Du G, Ye X, Huang P, Chen H. Polymorphisms of RIG-I-like receptor influence HBV clearance in Chinese Han population. J Med Virol 2021; 93:4957-4965. [PMID: 33783003 DOI: 10.1002/jmv.26969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 01/05/2023]
Abstract
Retinoic acid-inducible gene I-like receptors (RLRs) play an essential role in human innate immune, which may influence the spontaneous clearance of hepatitis B virus (HBV) infection. We aimed to investigate whether the SNPs in RLR family were associated with HBV spontaneous clearance. The current study included 82 participants with spontaneous clearance, 601 asymptomatic hepatitis B surface antigen (HBsAg) carriers, and 168 participants with chronic hepatitis B (CHB). Six SNPs (DDX58 rs3824456, rs3205166, DHX58 rs2074160, rs2074158, IFIH1 rs2111485, rs3747517) were genotyped to explore their association with HBV spontaneous clearance. Patients carrying the mutant allele C at rs3824456 or A at rs2074160 were more likely to achieve spontaneous clearance compared with asymptomatic HBsAg carriers (additive model: odds ratio [OR] = 0.69, 95% confidence interval [CI] = 0.49-0.97; dominant model: OR = 0.54, 95% CI = 0.31-0.95, respectively). In addition, patients carrying the mutant allele G at rs2111485 were more likely to achieve spontaneous clearance compared with CHB (dominant model: OR = 0.47, 95% CI = 0.25-0.87). The mutations were protective factors for HBV spontaneous clearance. These results suggest the DDX58 rs3824456, DHX58 s2074160, IFIH1 rs2111485 were associated with spontaneous clearance of HBV, which may be predictive markers in the Chinese Han population of HBV.
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Affiliation(s)
- Yinan Yao
- Department of Infectious Disease Control, Zhangjiagang Center for Disease Control and Prevention, Suzhou, China
| | - Yan Shen
- Department of Infectious Disease Control, Zhangjiagang Center for Disease Control and Prevention, Suzhou, China
| | - Haifeng Shao
- Department of Infectious Disease Control, Zhangjiagang Center for Disease Control and Prevention, Suzhou, China
| | - Yuchang Liu
- Department of Infectious Disease Control, Zhangjiagang Center for Disease Control and Prevention, Suzhou, China
| | - Yan Ji
- Department of Infectious Disease Control, Zhangjiagang Center for Disease Control and Prevention, Suzhou, China
| | - Guoming Du
- Department of Infectious Disease Control, Zhangjiagang Center for Disease Control and Prevention, Suzhou, China
| | - Xiangyu Ye
- Department of Epidemiology, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Peng Huang
- Department of Epidemiology, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China
- Key Laboratory of Infectious Diseases, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Haiming Chen
- Department of Infectious Disease Control, Zhangjiagang Center for Disease Control and Prevention, Suzhou, China
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43
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Roberts GHL, Santorico SA, Spritz RA. Deep genotype imputation captures virtually all heritability of autoimmune vitiligo. Hum Mol Genet 2021; 29:859-863. [PMID: 31943001 DOI: 10.1093/hmg/ddaa005] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 12/09/2019] [Accepted: 01/08/2020] [Indexed: 01/31/2023] Open
Abstract
Autoimmune vitiligo is a complex disease involving polygenic risk from at least 50 loci previously identified by genome-wide association studies. The objectives of this study were to estimate and compare vitiligo heritability in European-derived patients using both family-based and 'deep imputation' genotype-based approaches. We estimated family-based heritability (h2FAM) by vitiligo recurrence among a total 8034 first-degree relatives (3776 siblings, 4258 parents or offspring) of 2122 unrelated vitiligo probands. We estimated genotype-based heritability (h2SNP) by deep imputation to Haplotype Reference Consortium and the 1000 Genomes Project data in unrelated 2812 vitiligo cases and 37 079 controls genotyped genome wide, achieving high-quality imputation from markers with minor allele frequency (MAF) as low as 0.0001. Heritability estimated by both approaches was exceedingly high; h2FAM = 0.75-0.83 and h2SNP = 0.78. These estimates are statistically identical, indicating there is essentially no remaining 'missing heritability' for vitiligo. Overall, ~70% of h2SNP is represented by common variants (MAF > 0.01) and 30% by rare variants. These results demonstrate that essentially all vitiligo heritable risk is captured by array-based genotyping and deep imputation. These findings suggest that vitiligo may provide a particularly tractable model for investigation of complex disease genetic architecture and predictive aspects of personalized medicine.
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Affiliation(s)
- Genevieve H L Roberts
- Human Medical Genetics and Genomics Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Stephanie A Santorico
- Human Medical Genetics and Genomics Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA.,Department of Mathematical and Statistical Sciences, University of Colorado Denver, Denver, CO 80217, USA.,Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Aurora, CO 80045, USA.,Division of Biomedical Informatics and Personalized Medicine, Department of Medicine, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Richard A Spritz
- Human Medical Genetics and Genomics Program, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045, USA.,Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA
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44
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Boniface K, Passeron T, Seneschal J, Tulic MK. Targeting Innate Immunity to Combat Cutaneous Stress: The Vitiligo Perspective. Front Immunol 2021; 12:613056. [PMID: 33936032 PMCID: PMC8079779 DOI: 10.3389/fimmu.2021.613056] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 03/22/2021] [Indexed: 02/06/2023] Open
Abstract
Multiple factors are involved in the process leading to melanocyte loss in vitiligo including environmental triggers, genetic polymorphisms, metabolic alterations, and autoimmunity. This review aims to highlight current knowledge on how danger signals released by stressed epidermal cells in a predisposed patient can trigger the innate immune system and initiate a cascade of events leading to an autoreactive immune response, ultimately contributing to melanocyte disappearance in vitiligo. We will explore the genetic data available, the specific role of damage-associated-molecular patterns, and pattern-recognition receptors, as well as the cellular players involved in the innate immune response. Finally, the relevance of therapeutic strategies targeting this pathway to improve this inflammatory and autoimmune condition is also discussed.
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Affiliation(s)
- Katia Boniface
- Univ. Bordeaux, INSERM, BMGIC, U1035, Immuno-dermatology Team, Bordeaux, France
| | - Thierry Passeron
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Côte d'Azur University, Nice, France.,Côte d'Azur University, Department of Dermatology, CHU Nice, Nice, France
| | - Julien Seneschal
- Univ. Bordeaux, INSERM, BMGIC, U1035, Immuno-dermatology Team, Bordeaux, France.,Department of Dermatology and Pediatric Dermatology, National Reference Center for Rare Skin Disorders, Hôpital Saint-André, Bordeaux, France
| | - Meri K Tulic
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Côte d'Azur University, Nice, France
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45
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Onomoto K, Onoguchi K, Yoneyama M. Regulation of RIG-I-like receptor-mediated signaling: interaction between host and viral factors. Cell Mol Immunol 2021; 18:539-555. [PMID: 33462384 PMCID: PMC7812568 DOI: 10.1038/s41423-020-00602-7] [Citation(s) in RCA: 170] [Impact Index Per Article: 56.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/17/2020] [Indexed: 01/31/2023] Open
Abstract
Retinoic acid-inducible gene I (RIG-I)-like receptors (RLRs) are RNA sensor molecules that play essential roles in innate antiviral immunity. Among the three RLRs encoded by the human genome, RIG-I and melanoma differentiation-associated gene 5, which contain N-terminal caspase recruitment domains, are activated upon the detection of viral RNAs in the cytoplasm of virus-infected cells. Activated RLRs induce downstream signaling via their interactions with mitochondrial antiviral signaling proteins and activate the production of type I and III interferons and inflammatory cytokines. Recent studies have shown that RLR-mediated signaling is regulated by interactions with endogenous RNAs and host proteins, such as those involved in stress responses and posttranslational modifications. Since RLR-mediated cytokine production is also involved in the regulation of acquired immunity, the deregulation of RLR-mediated signaling is associated with autoimmune and autoinflammatory disorders. Moreover, RLR-mediated signaling might be involved in the aberrant cytokine production observed in coronavirus disease 2019. Since the discovery of RLRs in 2004, significant progress has been made in understanding the mechanisms underlying the activation and regulation of RLR-mediated signaling pathways. Here, we review the recent advances in the understanding of regulated RNA recognition and signal activation by RLRs, focusing on the interactions between various host and viral factors.
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Affiliation(s)
- Koji Onomoto
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8673, Japan
| | - Kazuhide Onoguchi
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8673, Japan
| | - Mitsutoshi Yoneyama
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8673, Japan.
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46
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Chen J, Li S, Li C. Mechanisms of melanocyte death in vitiligo. Med Res Rev 2021; 41:1138-1166. [PMID: 33200838 PMCID: PMC7983894 DOI: 10.1002/med.21754] [Citation(s) in RCA: 108] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/16/2020] [Accepted: 11/01/2020] [Indexed: 12/12/2022]
Abstract
Vitiligo is an autoimmune depigment disease results from extensive melanocytes destruction. The destruction of melanocyte is thought to be of multifactorial causation. Genome-wide associated studies have identified single-nucleotide polymorphisms in a panel of susceptible loci as risk factors in melanocyte death. But vitiligo onset can't be solely attributed to a susceptive genetic background. Oxidative stress triggered by elevated levels of reactive oxygen species accounts for melanocytic molecular and organelle dysfunction, a minority of melanocyte demise, and melanocyte-specific antigens exposure. Of note, the self-responsive immune function directly contributes to the bulk of melanocyte deaths in vitiligo. The aberrantly heightened innate immunity, type-1-skewed T helper, and incompetent regulatory T cells tip the balance toward autoreaction and CD8+ cytotoxic T lymphocytes finally execute the killing of melanocytes, possibly alarmed by resident memory T cells. In addition to the well-established apoptosis and necrosis, we discuss several death modalities like oxeiptosis, ferroptosis, and necroptosis that are probably employed in melanocyte destruction. This review focuses on the various mechanisms of melanocytic death in vitiligo pathogenesis to demonstrate a panorama of that. We hope to provide new insights into vitiligo pathogenesis and treatment strategies by the review.
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Affiliation(s)
- Jianru Chen
- Department of DermatologyXijing hospital, Fourth Military Medical UniversityXi'anShannxiChina
| | - Shuli Li
- Department of DermatologyXijing hospital, Fourth Military Medical UniversityXi'anShannxiChina
| | - Chunying Li
- Department of DermatologyXijing hospital, Fourth Military Medical UniversityXi'anShannxiChina
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47
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Plaza-Rojas L, Guevara-Patiño JA. The Role of the NKG2D in Vitiligo. Front Immunol 2021; 12:624131. [PMID: 33717132 PMCID: PMC7952755 DOI: 10.3389/fimmu.2021.624131] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/02/2021] [Indexed: 12/16/2022] Open
Abstract
Vitiligo is an acquired multifactorial disease that affects melanocytes and results in skin depigmentation. In this review, we examine the role of cells stress and self-reactive T cells responses. Given the canonical and non-canonical functions of NKG2D, such as authenticating stressed target and enhance TCR signaling, we examine how melanocyte stress leads to the expression of ligands that are recognized by the activating receptor NKG2D, and how its signaling results in the turning of T cells against self (melanocyte suicide by proxy). We also discuss how this initiation phase is followed by T cell perpetuation, as NKG2D signaling results in self-sustained long-lasting T cells, with improved cytolytic properties.
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Affiliation(s)
- Lourdes Plaza-Rojas
- Department of Cancer Biology, Loyola University Chicago, Chicago, IL, United States
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48
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Cai M, Yuan T, Huang H, Gui L, Zhang L, Meng Z, Wu W, Sheng Y, Zhang X. Integrative Analysis of Omics Data Reveals Regulatory Network of CDK10 in Vitiligo Risk. Front Genet 2021; 12:634553. [PMID: 33679896 PMCID: PMC7925885 DOI: 10.3389/fgene.2021.634553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Accepted: 01/25/2021] [Indexed: 12/20/2022] Open
Abstract
Vitiligo is a multifactorial polygenic disorder, characterized by acquired depigmented skin and overlying hair resulting from the destruction of melanocytes. Genome-wide association studies (GWASs) of vitiligo have identified approximately 100 genetic variants. However, the identification of functional genes and their regulatory elements remains a challenge. To prioritize putative functional genes and DNAm sites, we performed a Summary data-based Mendelian Randomization (SMR) and heterogeneity in dependent instruments (HEIDI) test to integrate omics summary statistics from GWAS, expression quantitative trait locus (eQTL), and methylation quantitative trait loci (meQTL) analysis of large sample size. By integrating omics data, we identified two newly putative functional genes (SPATA2L and CDK10) associated with vitiligo and further validated CDK10 by qRT-PCR in independent samples. We also identified 17 vitiligo-associated DNA methylation (DNAm) sites in Chr16, of which cg05175606 was significantly associated with the expression of CDK10 and vitiligo. Colocalization analyses detected transcript of CDK10 in the blood and skin colocalizing with cg05175606 at single nucleotide polymorphism (SNP) rs77651727. Our findings revealed that a shared genetic variant rs77651727 alters the cg05175606 as well as up-regulates gene expression of CDK10 and further decreases the risk of vitiligo.
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Affiliation(s)
- Minglong Cai
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
| | - Tao Yuan
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
| | - He Huang
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
| | - Lan Gui
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
| | - Li Zhang
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
| | - Ziyuan Meng
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
| | - Wenjuan Wu
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
| | - Yujun Sheng
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
| | - Xuejun Zhang
- Department of Dermatology, The First Affiliated Hospital of Anhui Medical University, Hefei, China.,Institute of Dermatology, Anhui Medical University, Hefei, China
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49
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Birolo G, Aneli S, Di Gaetano C, Cugliari G, Russo A, Allione A, Casalone E, Giorgio E, Paraboschi EM, Ardissino D, Duga S, Asselta R, Matullo G. Functional and clinical implications of genetic structure in 1686 Italian exomes. Hum Mutat 2021; 42:272-289. [PMID: 33326653 DOI: 10.1002/humu.24156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 11/13/2020] [Accepted: 12/11/2020] [Indexed: 12/12/2022]
Abstract
To reconstruct the phenotypical and clinical implications of the Italian genetic structure, we thoroughly analyzed a whole-exome sequencing data set comprised of 1686 healthy Italian individuals. We found six previously unreported variants with remarkable frequency differences between Northern and Southern Italy in the HERC2, OR52R1, ADH1B, and THBS4 genes. We reported 36 clinically relevant variants (submitted as pathogenic, risk factors, or drug response in ClinVar) with significant frequency differences between Italy and Europe. We then explored putatively pathogenic variants in the Italian exome. On average, our Italian individuals carried 16.6 protein-truncating variants (PTVs), with 2.5% of the population having a PTV in one of the 59 American College of Medical Genetics (ACMG) actionable genes. Lastly, we looked for PTVs that are likely to cause Mendelian diseases. We found four heterozygous PTVs in haploinsufficient genes (KAT6A, PTCH1, and STXBP1) and three homozygous PTVs in genes causing recessive diseases (DPYD, FLG, and PYGM). Comparing frequencies from our data set to other public databases, like gnomAD, we showed the importance of population-specific databases for a more accurate assessment of variant pathogenicity. For this reason, we made aggregated frequencies from our data set publicly available as a tool for both clinicians and researchers (http://nigdb.cineca.it; NIG-ExIT).
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Affiliation(s)
- Giovanni Birolo
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - Serena Aneli
- Department of Medical Sciences, University of Turin, Turin, Italy
| | | | | | - Alessia Russo
- Department of Medical Sciences, University of Turin, Turin, Italy
| | | | | | - Elisa Giorgio
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - Elvezia M Paraboschi
- Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy.,Humanitas Clinical and Research Center-IRCCS, Rozzano, Milan, Italy
| | - Diego Ardissino
- Division of Cardiology, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Stefano Duga
- Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy.,Humanitas Clinical and Research Center-IRCCS, Rozzano, Milan, Italy
| | - Rosanna Asselta
- Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy.,Humanitas Clinical and Research Center-IRCCS, Rozzano, Milan, Italy
| | - Giuseppe Matullo
- Department of Medical Sciences, University of Turin, Turin, Italy
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Singh H, Koury J, Kaul M. Innate Immune Sensing of Viruses and Its Consequences for the Central Nervous System. Viruses 2021; 13:170. [PMID: 33498715 PMCID: PMC7912342 DOI: 10.3390/v13020170] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/13/2022] Open
Abstract
Viral infections remain a global public health concern and cause a severe societal and economic burden. At the organismal level, the innate immune system is essential for the detection of viruses and constitutes the first line of defense. Viral components are sensed by host pattern recognition receptors (PRRs). PRRs can be further classified based on their localization into Toll-like receptors (TLRs), C-type lectin receptors (CLR), retinoic acid-inducible gene-I (RIG-I)-like receptors (RLRs), NOD-like receptors (NLRs) and cytosolic DNA sensors (CDS). TLR and RLR signaling results in production of type I interferons (IFNα and -β) and pro-inflammatory cytokines in a cell-specific manner, whereas NLR signaling leads to the production of interleukin-1 family proteins. On the other hand, CLRs are capable of sensing glycans present in viral pathogens, which can induce phagocytic, endocytic, antimicrobial, and pro- inflammatory responses. Peripheral immune sensing of viruses and the ensuing cytokine response can significantly affect the central nervous system (CNS). But viruses can also directly enter the CNS via a multitude of routes, such as the nasal epithelium, along nerve fibers connecting to the periphery and as cargo of infiltrating infected cells passing through the blood brain barrier, triggering innate immune sensing and cytokine responses directly in the CNS. Here, we review mechanisms of viral immune sensing and currently recognized consequences for the CNS of innate immune responses to viruses.
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Affiliation(s)
- Hina Singh
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA; (H.S.); (J.K.)
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Jeffrey Koury
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA; (H.S.); (J.K.)
| | - Marcus Kaul
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA; (H.S.); (J.K.)
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
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