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Pham JP, Wark KJL, Woods J, Frew JW. Resident cutaneous memory T cells: a clinical review of their role in chronic inflammatory dermatoses and potential as therapeutic targets. Br J Dermatol 2023; 189:656-663. [PMID: 37603832 DOI: 10.1093/bjd/ljad303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 08/07/2023] [Accepted: 08/17/2023] [Indexed: 08/23/2023]
Abstract
Resident memory T cells (T-RMs) remain in epithelial barrier tissues after antigen exposure and the initial effector phase. These T-RMs provide effective antimicrobial and anticancer immunity; however, pathogenic T-RMs have been shown to mediate various chronic inflammatory disorders in a variety of tissue types. In the skin, T-RMs are referred to as resident cutaneous memory T cells (cT-RMs). Understanding the mechanisms leading to the development and establishment of these cT-RMs populations may allow for targeted treatments that provide durable responses in chronic immune-mediated skin diseases, even after cessation. In this review, we summarize the evidence on cT-RMs as drivers of chronic inflammatory dermatoses, including psoriasis, vitiligo, atopic dermatitis, cutaneous lupus erythematosus and alopecia areata, among others. Data from in vitro, animal model and ex vivo human studies are presented, with a focus on the potential for cT-RMs to trigger acute disease flares, as well as recurrent disease, by establishing an immune 'memory' in the skin. Furthermore, the available data on the potential for existing and novel treatments to affect the development or survival of cT-RMs in the skin are synthesized. The data suggest a dynamic and rapidly growing area in the field of dermatology; however, we also discuss areas in need of greater research to allow for optimal treatment selection for long-term disease control.
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Affiliation(s)
- James P Pham
- School of Clinical Medicine, UNSW Medicine and Health, Sydney, NSW, Australia
- Department of Dermatology, Liverpool Hospital, Liverpool, NSW, Australia
- Laboratory of Translational Cutaneous Medicine, Ingham Institute of Applied Medical Research, Liverpool, NSW, Australia
| | - Kirsty J L Wark
- Department of Dermatology, Liverpool Hospital, Liverpool, NSW, Australia
| | - Jane Woods
- School of Clinical Medicine, UNSW Medicine and Health, Sydney, NSW, Australia
- Department of Dermatology, Liverpool Hospital, Liverpool, NSW, Australia
| | - John W Frew
- School of Clinical Medicine, UNSW Medicine and Health, Sydney, NSW, Australia
- Department of Dermatology, Liverpool Hospital, Liverpool, NSW, Australia
- Laboratory of Translational Cutaneous Medicine, Ingham Institute of Applied Medical Research, Liverpool, NSW, Australia
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Ho CY, Wu CY, Chen JYF, Wu CY. Clinical and Genetic Aspects of Alopecia Areata: A Cutting Edge Review. Genes (Basel) 2023; 14:1362. [PMID: 37510267 PMCID: PMC10379312 DOI: 10.3390/genes14071362] [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: 05/10/2023] [Revised: 06/21/2023] [Accepted: 06/23/2023] [Indexed: 07/30/2023] Open
Abstract
Alopecia areata (AA) is a chronic, non-scarring, immune-mediated skin disease that affects approximately 0.5-2% of the global population. The etiology of AA is complex and involves genetic and environmental factors, with significant advancements in genetic research occurring in recent years. In addition to well-known genes such as PTPN22, CTLA4, and IL2, which have been widely supported as being associated with AA, an increasing number of specific gene-related loci have been discovered through advances in genetic research. For instance, gene analysis of microRNAs can reveal the critical role of miRNAs in regulating gene expression, aiding in the understanding of cellular and organismal functional regulatory mechanisms. Furthermore, numerous studies have confirmed the existence of correlations between AA and other immune-related diseases. Examples include hyperthyroidism and rheumatoid arthritis. By understanding the interrelationships between AA and other immune diseases, we can further comprehend potential shared genetic foundations or pathogenic mechanisms among different diseases. Genetic research plays a crucial role in unraveling the pathogenesis of AA, as the identification of genetic variations associated with AA can assist in formulating more effective and targeted treatment strategies.
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Affiliation(s)
- Chih-Yi Ho
- Department of Dermatology, College of Medicine and Post Baccalaureat Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 801, Taiwan
| | - Chiu-Yen Wu
- Department of Cosmetic Science, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan
| | - Jeff Yi-Fu Chen
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Ching-Ying Wu
- Department of Dermatology, College of Medicine and Post Baccalaureat Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 801, Taiwan
- Department of Cosmetic Science, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan
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Karami H, Nomiri S, Ghasemigol M, Mehrvarzian N, Derakhshani A, Fereidouni M, Mirimoghaddam M, Safarpour H. CHAC1 as a novel biomarker for distinguishing alopecia from other dermatological diseases and determining its severity. IET Syst Biol 2022; 16:173-185. [PMID: 35983595 PMCID: PMC9469792 DOI: 10.1049/syb2.12048] [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: 08/29/2021] [Revised: 06/11/2022] [Accepted: 07/20/2022] [Indexed: 11/20/2022] Open
Abstract
Alopecia Areata (AA) is characterised by an autoimmune response to hair follicles (HFs) and its exact pathobiology remains unclear. The current study aims to look into the molecular changes in the skin of AA patients as well as the potential underlying molecular mechanisms of AA in order to identify potential candidates for early detection and treatment of AA. We applied Weighted Gene Co-expression Network Analysis (WGCNA) to identify key modules, hub genes, and mRNA-miRNA regulatory networks associated with AA. Furthermore, Chi2 as a machine-learning algorithm was used to compute the gene importance in AA. Finally, drug-target construction revealed the potential of repositioning drugs for the treatment of AA. Our analysis using four AA data sets established a network strongly correlated to AA pathogenicity based on GZMA, OXCT2, HOXC13, KRT40, COMP, CHAC1, and KRT83 hub genes. Interestingly, machine learning introduced these genes as important in AA pathogenicity. Besides that, using another ten data sets, we showed that CHAC1 could clearly distinguish AA from similar clinical phenotypes, such as scarring alopecia due to psoriasis. Also, two FDA-approved drug candidates and 30 experimentally validated miRNAs were identified that affected the co-expression network. Using transcriptome analysis, suggested CHAC1 as a potential diagnostic predictor to diagnose AA.
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Affiliation(s)
- Hassan Karami
- Student Research CommitteeFaculty of MedicineBirjand University of Medical SciencesBirjandIran
| | - Samira Nomiri
- Department of BiochemistryFaculty of MedicineBirjand University of Medical SciencesBirjandIran
| | | | - Niloufar Mehrvarzian
- Department of Pharmaceutical NanotechnologyFaculty of PharmacyMashhad University of Medical SciencesMashhadIran
| | - Afshin Derakhshani
- McCaig Institute, Hotchkiss Brain InstituteSnyder Institute for Chronic DiseasesUniversity of CalgaryCalgary, AlbertaCanada,Department of Biochemistry and Molecular BiologyUniversity of CalgaryCalgaryAlbertaCanada
| | - Mohammad Fereidouni
- Cellular and Molecular Research CenterBirjand University of Medical SciencesBirjandIran
| | | | - Hossein Safarpour
- Cellular and Molecular Research CenterBirjand University of Medical SciencesBirjandIran
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Wang D, Xu X, Li X, Shi J, Tong X, Chen J, Lu J, Huang J, Yang S. CCL13 is upregulated in alopecia areata lesions and is correlated with disease severity. Exp Dermatol 2021; 30:723-732. [PMID: 33523560 DOI: 10.1111/exd.14293] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 12/27/2020] [Accepted: 01/20/2021] [Indexed: 01/14/2023]
Abstract
Alopecia areata (AA) is a multi-factors disease characterized by non-scarring hair loss. AA could be classified into three main clinical phenotypes including patchy type AA (AAP), alopecia totalis (AT) and alopecia universalis (AU) based on the severity and areas of hair loss. Recent studies suggested immunological factor was critical in AA, but the precise aetiology and pathogenesis of AA still need exploration. In the work, we screened two gene expression profiles (GSE45512 and GSE68801) from Gene Expression Omnibus (GEO). Based on the two data sets, 10 upregulated genes and 107 downregulated genes in AA skin biopsies were identified. CCL13, as one of the remarkably upregulated genes, was found to have potential biological functions in aberrant immune response of AA according to the GO and KEGG analyses. The PPI network showed CCL13 was associated with multiple immune-related genes. The expression of CCL13 was increased depending on the severity of disease in AA patients. Cytotoxic lymphocytes, T cells and myeloid dendritic cells accumulated remarkably in scalp tissue depending on the severity of AA, and CCL13 was significantly correlated to cytotoxic lymphocytes, T cells and myeloid dendritic cells in AA patients. Our RT-PCR and ELISA results found CCL13 was upregulated in skin biopsy and serum of AA patients, and the immunohistochemistry (IHC) detection showed CCL13 was expressed by both the hair follicle epithelium and infiltrating immune cells. In conclusion, the upregulated of CCL13 and subsequent immune cell infiltration was related to AA, which could be a promising target for diagnosis and therapy in AA patients.
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Affiliation(s)
- Dan Wang
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Xueming Xu
- Department of Hematology, The Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Xizhe Li
- Department of Thoracic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Jian Shi
- Department of Orthopedics, Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Xiaoliang Tong
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Jing Chen
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Jianyun Lu
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Jinhua Huang
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Shengbo Yang
- Department of Dermatology, The Third Xiangya Hospital, Central South University, Changsha, Hunan Province, China
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