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Guida S, Puig S, DI Resta C, Sallustio F, Mangano E, Stabile G, Longo C, Pellacani G, Guida G, Rongioletti F. Melanocortin-1 receptor (MC1R): a review for dermatologists. Ital J Dermatol Venerol 2024; 159:285-293. [PMID: 38376504 DOI: 10.23736/s2784-8671.24.07839-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Melanocortin-1 receptor (MC1R) and its variants have a pivotal role in melanin synthesis. However, MC1R has been associated to non-pigmentary pathways related to DNA-repair activities and inflammation. The aim of this review is to provide an up-to-date overview about the role of MC1R in the skin. Specifically, after summarizing the current knowledge about MC1R structure and polymorphisms, we report data concerning the correlation between MC1R, phenotypic traits, skin aging, other diseases and skin cancers and their risk assessment through genetic testing.
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Affiliation(s)
- Stefania Guida
- Dermatology Clinic, IRCCS San Raffaele Hospital, Milan, Italy -
- Faculty of Medicine, Vita-Salute San Raffaele University, Milan, Italy -
| | - Susana Puig
- Melanoma Unit, Department of Dermatology, Hospital Clínic de Barcelona, Instituto de Investigaciones Biomédicas August Pi i Sunye, University of Barcelona, Barcelona, Spain
| | - Chiara DI Resta
- Faculty of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Genomic Unit for the Diagnosis of Human Pathologies, IRCCS San Raffaele Hospital, Milan, Italy
| | - Fabio Sallustio
- Department of Interdisciplinary Medicine, Aldo Moro University of Bari, Bari, Italy
| | - Eleonora Mangano
- Institute of Biomedical Technologies (ITB), National Research Center (CNR), Segrate, Milan, Italy
| | - Giorgio Stabile
- Dermatology Clinic, IRCCS San Raffaele Hospital, Milan, Italy
- Faculty of Medicine, Vita-Salute San Raffaele University, Milan, Italy
| | - Caterina Longo
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
- Skin Cancer Center, Azienda Unità Sanitaria Locale, IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | | | - Gabriella Guida
- Section of Molecular Biology, Department of Basic Medical Sciences, Neurosciences and Sense Organs, Aldo Moro University of Bari, Bari, Italy
| | - Franco Rongioletti
- Dermatology Clinic, IRCCS San Raffaele Hospital, Milan, Italy
- Faculty of Medicine, Vita-Salute San Raffaele University, Milan, Italy
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2
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Feng W, Zhou Q, Chen X, Dai A, Cai X, Liu X, Zhao F, Chen Y, Ye C, Xu Y, Cong Z, Li H, Lin S, Yang D, Wang MW. Structural insights into ligand recognition and subtype selectivity of the human melanocortin-3 and melanocortin-5 receptors. Cell Discov 2023; 9:81. [PMID: 37524700 PMCID: PMC10390531 DOI: 10.1038/s41421-023-00586-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 07/10/2023] [Indexed: 08/02/2023] Open
Abstract
Members of the melanocortin receptor (MCR) family that recognize different melanocortin peptides mediate a broad spectrum of cellular processes including energy homeostasis, inflammation and skin pigmentation through five MCR subtypes (MC1R-MC5R). The structural basis of subtype selectivity of the endogenous agonist γ-MSH and non-selectivity of agonist α-MSH remains elusive, as the two agonists are highly similar with a conserved HFRW motif. Here, we report three cryo-electron microscopy structures of MC3R-Gs in complex with γ-MSH and MC5R-Gs in the presence of α-MSH or a potent synthetic agonist PG-901. The structures reveal that α-MSH and γ-MSH adopt a "U-shape" conformation, penetrate into the wide-open orthosteric pocket and form massive common contacts with MCRs via the HFRW motif. The C-terminus of γ-MSH occupies an MC3R-specific complementary binding groove likely conferring subtype selectivity, whereas that of α-MSH distances itself from the receptor with neglectable contacts. PG-901 achieves the same potency as α-MSH with a shorter length by rebalancing the recognition site and mimicking the intra-peptide salt bridge in α-MSH by cyclization. Solid density confirmed the calcium ion binding in MC3R and MC5R, and the distinct modulation effects of divalent ions were demonstrated. Our results provide insights into ligand recognition and subtype selectivity among MCRs, and expand the knowledge of signal transduction among MCR family members.
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Affiliation(s)
- Wenbo Feng
- Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Qingtong Zhou
- Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Xianyue Chen
- Research Center for Deepsea Bioresources, Sanya, Hainan, China
| | - Antao Dai
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- The National Center for Drug Screening, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Xiaoqing Cai
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- The National Center for Drug Screening, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Xiao Liu
- Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Fenghui Zhao
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- The National Center for Drug Screening, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Yan Chen
- Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Chenyu Ye
- Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Yingna Xu
- Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Zhaotong Cong
- Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Hao Li
- Research Center for Deepsea Bioresources, Sanya, Hainan, China
| | - Shi Lin
- Research Center for Deepsea Bioresources, Sanya, Hainan, China
| | - Dehua Yang
- Research Center for Deepsea Bioresources, Sanya, Hainan, China.
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
- The National Center for Drug Screening, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
- University of Chinese Academy of Sciences, Beijing, China.
| | - Ming-Wei Wang
- Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China.
- Research Center for Deepsea Bioresources, Sanya, Hainan, China.
- Department of Chemistry, School of Science, The University of Tokyo, Tokyo, Japan.
- School of Pharmacy, Hainan Medical University, Haikou, Hainan, China.
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Millington GWM, Palmer HE. Proopiomelanocortin (POMC) and psychodermatology. SKIN HEALTH AND DISEASE 2023; 3:e201. [PMID: 37275429 PMCID: PMC10233089 DOI: 10.1002/ski2.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 11/30/2022] [Accepted: 12/13/2022] [Indexed: 06/07/2023]
Abstract
Psychodermatology is the crossover discipline between Dermatology and Clinical Psychology and/or Psychiatry. It encompasses both Psychiatric diseases that present with cutaneous manifestations (such as delusional infestation) or more commonly, the psychiatric or psychological problems associated with skin disease, such as depression associated with psoriasis. These problems may be the result either of imbalance in or be the consequence of alteration in the homoeostatic endocrine mechanisms found in the systemic hypothalamic-pituitary-adrenal axis or in the local cutaneous corticotrophin-releasing factor-proopiomelanocortin-corticosteroid axis. Alteration in either of these systems can lead to immune disruption and worsening of immune dermatoses and vice-versa. These include diseases such as psoriasis, atopic eczema, acne, alopecia areata, vitiligo and melasma, all of which are known to be linked to stress. Similarly, stress and illnesses such as depression are linked with many immunodermatoses and may reflect alterations in the body's central and peripheral neuroendocrine stress pathways. It is important to consider issues pertaining to skin of colour, particularly with pigmentary disorders.
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Affiliation(s)
- George W. M. Millington
- Dermatology DepartmentNorfolk and Norwich University HospitalNorwichUK
- Norwich Medical SchoolNorwichUK
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4
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Xie B, Zhu Y, Shen Y, Xu W, Song X. Treatment update for vitiligo based on autoimmune inhibition and melanocyte protection. Expert Opin Ther Targets 2023; 27:189-206. [PMID: 36947026 DOI: 10.1080/14728222.2023.2193329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
INTRODUCTION The treatment of vitiligo remains challenging due to the complexity of its pathogenesis, influenced by genetic factors, oxidative stress and abnormal cell adhesion that collectively impact melanocyte survival and trigger immune system attacks, resulting in melanocyte death. Melanocytes in vitiligo are believed to exhibit genetic susceptibility and defects in cellular mechanisms, such as defects in autophagy, that reduce their ability to resist oxidative stress, leading to increased expression of the pro-inflammatory protein HSP70. The low expression of adhesion molecules, such as DDR1 and E-cadherin, accelerates melanocyte damage and antigen exposure. Consequently, autoimmune attacks centered on IFN-γ-CXCR9/10-CXCR3-CD8+ T cells are initiated, causing vitiligo. AREAS COVERED This review discusses the latest knowledge on the pathogenesis of vitiligo and potential therapeutic targets from the perspective of suppressing autoimmune attacks and activating melanocytes functions. EXPERT OPINION Vitiligo is one of the most challenging dermatological diseases due to its complex pathogenesis with diverse therapeutic targets. Immune suppression, such as corticosteroids and emerging JAK inhibitors, has proven effective in disease progression. However, during the early stages of the disease, it is also important to optimize therapeutic strategies to activate melanocytes for alleviating oxidative stress and improving treatment outcomes.
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Affiliation(s)
- Bo Xie
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
| | - Yuqi Zhu
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
- Zhejiang Chinese Medical University; Binwen Rd 548, Hangzhou, 310053, People's Republic of China
| | - Yuqing Shen
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
- Zhejiang Chinese Medical University; Binwen Rd 548, Hangzhou, 310053, People's Republic of China
| | - Wen Xu
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
- Zhejiang University School of Medicine; Yuhangtang Rd 866, Hangzhou, 310058, People's Republic of China
| | - Xiuzu Song
- Department of Dermatology, Hangzhou Third People's Hospital, Hangzhou Third Hospital Affiliated to Zhejiang Chinese Medical University, Affiliated Hangzhou Dermatology Hospital, Zhejiang University School of Medicine; West Lake Ave 38, Hangzhou, 310009, People's Republic of China
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5
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Structural mechanism of calcium-mediated hormone recognition and Gβ interaction by the human melanocortin-1 receptor. Cell Res 2021; 31:1061-1071. [PMID: 34453129 PMCID: PMC8486761 DOI: 10.1038/s41422-021-00557-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 07/30/2021] [Indexed: 02/07/2023] Open
Abstract
Melanocortins are peptide hormones critical for the regulation of stress response, energy homeostasis, inflammation, and skin pigmentation. Their functions are mediated by five G protein-coupled receptors (MC1R-MC5R), predominately through the stimulatory G protein (Gs). MC1R, the founding member of melanocortin receptors, is mainly expressed in melanocytes and is involved in melanogenesis. Dysfunction of MC1R is associated with the development of melanoma and skin cancer. Here we present three cryo-electron microscopy structures of the MC1R-Gs complexes bound to endogenous hormone α-MSH, a marketed drug afamelanotide, and a synthetic agonist SHU9119. These structures reveal the orthosteric binding pocket for the conserved HFRW motif among melanocortins and the crucial role of calcium ion in ligand binding. They also demonstrate the basis of differential activities among different ligands. In addition, unexpected interactions between MC1R and the Gβ subunit were discovered from these structures. Together, our results elucidate a conserved mechanism of calcium-mediated ligand recognition, a specific mode of G protein coupling, and a universal activation pathway of melanocortin receptors.
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Diehl C, Sadoughifar R, Binic I, Golubovic M. A new, innovative, and safe treatment in vitiligo: Results of a randomized, double-blinded, parallel-group study. Dermatol Ther 2021; 34:e14697. [PMID: 33351209 DOI: 10.1111/dth.14697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/04/2020] [Indexed: 11/30/2022]
Abstract
Vitiligo is a chronic autoimmune disease affecting around 1% of the population worldwide. No existing treatment is giving fully satisfactory results. Further investigations are welcomed for innovative and safe treatments bringing better results. This trial aimed to compare the efficacy and tolerance of various treatment protocols on vitiligo lesions. Four randomized groups of 10 patients with vitiligo covering 8% to 14% of skin surface, except hands and feet were assigned during 8 weeks to (a) UVB microphototherapy 300 to 320 nm (Bioskin-) 1 x week; (b) VITILSI- gel 2 x day; (c) VITILSI- gel 2xday + Bioskin- 1 x week; and (d) placebo 2 x day. Efficacy of the treatment was assessed by planimetry, comparing the photographs of the patients taken at baseline and after 8-week treatment. After completion of the treatment, the increase of the pigment area was 28% in G1 (Bioskin-), 19% in G2 (VITILSI-), 41% in G3 (Bioskin- + VITILSI-) and null in G4. No subject stopped the treatment and no side effect was observed. It was demonstrated that the gel under study was able per se to induce repigmentation in vitiligo lesions and that the results were significantly better when combined with NB-UVB. The protocols used in this trial resulted safe and efficient.
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Affiliation(s)
- Christian Diehl
- Department of Dermatology, University of Rome G. Marconi, Rome, Italy
| | - Roxanna Sadoughifar
- Department of Dermatology, University of Rome G. Marconi, Rome, Italy.,Bidar Skin Center, Tehran, Iran
| | - Iva Binic
- Medical Faculty, Psychiatric Clinic, University of Niš, Niš, Serbia
| | - Masa Golubovic
- Department of Dermatology, Clinical Center, University of Niš, Niš, Serbia
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7
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Ocampo-Garza J, Salinas-Santander M, Welsh O, Herz-Ruelas M, Ocampo-Candiani J. Expression of melanocortin 1 receptor before and after narrowband UVB phototherapy treatment in patients with stable vitiligo: A prospective study. Exp Ther Med 2020; 19:1649-1654. [PMID: 32104216 PMCID: PMC7027148 DOI: 10.3892/etm.2020.8435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 08/16/2019] [Indexed: 12/13/2022] Open
Abstract
Vitiligo is a disease characterized by skin depigmentation caused by the selective destruction of melanocytes. The melanocortin system participates as a regulator of melanogenesis and skin pigmentation. Narrowband UVB phototherapy (nb-UVB) is currently considered to be the gold standard and first choice treatment method for vitiligo vulgaris. The aim of the present study was to analyze the clinical and biochemical parameters of vitiligo, as well as to determine the expression of proopiomelanocortin (POMC), melanocortin 1 receptor (MC1R) and melanocortin 4 receptor (MC4R) genes in the skin of patients with stable vitiligo receiving nb-UVB phototherapy. Patient clinical and biochemical parameters, and the skin biopsies of 22 patients with stable vitiligo were analyzed. These biopsies were obtained before and after nb-UVB phototherapy. The genetic expression analysis of POMC, MC1R and MC4R genes was performed via RNA-Sequence analysis. A statistical evaluation of the clinical and biochemical parameters, the degree of response to treatment and the expression profiles of the melanocortin system genes were performed to identify their association with treatment response. A two-sided P≤0.05 value was considered to indicate a statistically significant difference. Alterations were observed in the expression profiles of MC1R following nb-UVB phototherapy (P≤0.05). In addition, elevated levels of triiodothyronine were associated with a poor response to nb-UVB phototherapy. In conclusion the current study revealed that nb-UVB phototherapy altered the expression profile of the MC1R gene.
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Affiliation(s)
- Jorge Ocampo-Garza
- Department of Dermatology, 'Dr. Jose Eleuterio Gonzalez' University Hospital of The School of Medicine, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León 64460, Mexico
| | - Mauricio Salinas-Santander
- Department of Research, Universidad Autónoma de Coahuila, Faculty of Medicine, Saltillo, Coahuila 25000, Mexico
| | - Oliverio Welsh
- Department of Dermatology, 'Dr. Jose Eleuterio Gonzalez' University Hospital of The School of Medicine, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León 64460, Mexico
| | - Maira Herz-Ruelas
- Department of Dermatology, 'Dr. Jose Eleuterio Gonzalez' University Hospital of The School of Medicine, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León 64460, Mexico
| | - Jorge Ocampo-Candiani
- Department of Dermatology, 'Dr. Jose Eleuterio Gonzalez' University Hospital of The School of Medicine, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León 64460, Mexico
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8
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Ocampo-Candiani J, Salinas-Santander M, Trevino V, Ortiz-López R, Ocampo-Garza J, Sanchez-Dominguez CN. Evaluation of skin expression profiles of patients with vitiligo treated with narrow-band UVB therapy by targeted RNA-seq. An Bras Dermatol 2019; 93:843-851. [PMID: 30484529 PMCID: PMC6256230 DOI: 10.1590/abd1806-4841.20187589] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Accepted: 10/20/2017] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Vitiligo is characterized by a lack of pigmentation in the skin. To date, there are no studies that analyze the changes in gene expression in the skin of vitiligo patients in response to narrow-band ultraviolet B (nb-UVB) phototherapy treatment. OBJECTIVE Explore the usefulness of new generation RNA sequencing in the identification of gene expression changes in the skin of vitiligo patients treated with nb-UVB phototherapy. METHODS Four skin biopsies (4mm in diameter) were collected from 45 Mexican vitiligo vulgaris patients, 2 specimens before and 2 after treatment with nb-UVB phototherapy, obtained from pigmented and non-pigmented tissue. RNA extracted from the biopsies was analyzed using the Illumina TruSeq Targeted RNA Expression protocol to study the expression of genes that participate in pathways of skin homeostasis. The 2 groups were compared using Student's t-test and the Mann-Whitney U-test. RESULTS The expression analysis identified differences in 12 genes included in this study after comparing the samples obtained before and after treatment: 5 genes involved in skin pigmentation, 2 genes involved in apoptosis, 2 genes involved in cell survival, 2 genes involved in oxidative stress responses and 1 gene involved in signal transduction mechanisms (p<0.05). STUDY LIMITATIONS The small size of skin biopsies limits the amount of RNA obtained, the number of genes to be analyzed and the use of conventional techniques such as RT-qPCR. CONCLUSION We demonstrated usefulness of new generation RNA sequencing in the identification of gene expression changes, in addition to identifying new targets in the study of vitiligo.
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Affiliation(s)
- Jorge Ocampo-Candiani
- Dermatology Service, Hospital Universitario Dr. José
Eleuterio González, Facultad de Medicina, Universidad Autónoma de
Nuevo León, Nuevo León, México
| | - Mauricio Salinas-Santander
- Department of Investigation, Facultad de Medicina Unidad Saltillo,
Universidad Autónoma de Coahuila, Saltillo, México
| | - Victor Trevino
- Escuela de Medicina y Ciencias de la Salud, Tecnológico de
Monterrey, Tecnológico de Monterrey, México
| | - Rocio Ortiz-López
- Escuela de Medicina y Ciencias de la Salud, Tecnológico de
Monterrey, Tecnológico de Monterrey, México
| | - Jorge Ocampo-Garza
- Dermatology Service, Hospital Universitario Dr. José
Eleuterio González, Facultad de Medicina, Universidad Autónoma de
Nuevo León, Nuevo León, México
| | - Celia Nohemi Sanchez-Dominguez
- Department of Biochemistry and Molecular Medicine, Facultad de
Medicina, Universidad Autónoma de Nuevo León, Nuevo León,
México
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9
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Salinas-Santander M, Trevino V, De la Rosa-Moreno E, Verduzco-Garza B, Sánchez-Domínguez CN, Cantú-Salinas C, Ocampo-Garza J, Lagos-Rodríguez A, Ocampo-Candiani J, Ortiz-López R. CAPN3, DCT, MLANA and TYRP1 are overexpressed in skin of vitiligo vulgaris Mexican patients. Exp Ther Med 2018; 15:2804-2811. [PMID: 29456684 PMCID: PMC5795480 DOI: 10.3892/etm.2018.5764] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 01/05/2018] [Indexed: 12/18/2022] Open
Abstract
Vitiligo is a disorder causing skin depigmentation, in which several factors have been proposed for its pathogenesis: Environmental, genetic and biological aspects of melanocytes, even those of the surrounding keratinocytes. However, the lack of understanding of the mechanisms has complicated the task of predicting the development and progression. The present study used microarray analysis to characterize the transcriptional profile of skin from Vitiligo Vulgaris (VV) patients and the identified transcripts were validated using targeted high-throughput RNA sequencing in a broader set of patients. For microarrays, mRNA was taken from 20 skin biopsies of 10 patients with VV (pigmented and depigmented skin biopsy of each), and 5 biopsies of healthy subjects matched for age and sex were used as a control. A signature was identified that contains the expression pattern of 722 genes between depigmented vitiligo skin vs. healthy control, 1,108 between the pigmented skin of vitiligo vs. healthy controls and 1,927 between pigmented skin, depigmented vitiligo and healthy controls (P<0.05; false discovery rate, <0.1). When comparing the pigmented and depigmented skin of patients with vitiligo, which reflects the real difference between both skin types, 5 differentially expressed genes were identified and further validated in 45 additional VV patients by RNA sequencing. This analysis showed significantly higher RNA levels of calpain-3, dopachrome tautomerase, melan-A and tyrosinase-related protein-1 genes. The data revealed that the pigmented skin of vitiligo is already affected at the level of gene expression and that the main differences between pigmented and non-pigmented skin are explained by the expression of genes associated with pigment metabolism.
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Affiliation(s)
- Mauricio Salinas-Santander
- Departamento de Bioquímica y Medicina Molecular, Universidad Autónoma de Nuevo León, Facultad de Medicina, Monterrey, Nuevo León 64460, México.,Departamento de Investigación, Facultad de Medicina Unidad Saltillo, Universidad Autónoma de Coahuila, Saltillo, Coahuila 25000, México
| | - Víctor Trevino
- Grupo de Investigación en Bioinformática, Escuela de Medicina, Tecnológico de Monterrey, Monterrey, Nuevo León 64849, México
| | - Eduardo De la Rosa-Moreno
- Centro de Investigación y Desarrollo en Ciencias de la Salud, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León 64460, México
| | - Bárbara Verduzco-Garza
- Centro de Investigación y Desarrollo en Ciencias de la Salud, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León 64460, México
| | - Celia N Sánchez-Domínguez
- Departamento de Bioquímica y Medicina Molecular, Universidad Autónoma de Nuevo León, Facultad de Medicina, Monterrey, Nuevo León 64460, México
| | - Cristina Cantú-Salinas
- Servicio de Dermatología, Universidad Autónoma de Nuevo León, Hospital Universitario Dr. José Eleuterio González, Facultad de Medicina, Monterrey, Nuevo León 64460, México
| | - Jorge Ocampo-Garza
- Servicio de Dermatología, Universidad Autónoma de Nuevo León, Hospital Universitario Dr. José Eleuterio González, Facultad de Medicina, Monterrey, Nuevo León 64460, México
| | - Armando Lagos-Rodríguez
- Servicio de Dermatología, Universidad Autónoma de Nuevo León, Hospital Universitario Dr. José Eleuterio González, Facultad de Medicina, Monterrey, Nuevo León 64460, México
| | - Jorge Ocampo-Candiani
- Servicio de Dermatología, Universidad Autónoma de Nuevo León, Hospital Universitario Dr. José Eleuterio González, Facultad de Medicina, Monterrey, Nuevo León 64460, México
| | - Rocio Ortiz-López
- Centro de Investigación y Desarrollo en Ciencias de la Salud, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León 64460, México.,Escuela de Medicina, Tecnológico de Monterrey, Monterrey, Nuevo León 64849, México
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