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Sexual dimorphism in melanocyte stem cell behavior reveals combinational therapeutic strategies for cutaneous repigmentation [RNA-Seq]

ABSTRACT: Vitiligo is an autoimmune skin disease caused by cutaneous melanocyte loss. Although phototherapy and T cell suppression therapy have been widely used to induce epidermal re-pigmentation, full pigmentation recovery is rarely achieved due to our poor understanding of the cellular and molecular mechanisms governing this process. Here, we identify unique melanocyte stem cell (McSC) epidermal migration rates between male and female mice, which is due to sexually dimorphic cutaneous inflammatory responses generated by ultra-violet B exposure. Using genetically engineered mouse models, and unbiased bulk and single-cell mRNA sequencing approaches, we determine that manipulating the inflammatory response through cyclooxygenase and its downstream prostaglandin product regulates McSC proliferation and epidermal migration in response to UVB exposure. Furthermore, we demonstrate that a combinational therapy that manipulates both macrophages and T cells (or innate and adaptive immunity) significantly promotes epidermal melanocyte re-population. With these findings, we propose a novel therapeutic strategy for repigmentation in patients with depigmentation conditions such as vitiligo.

ORGANISM(S): Mus musculus

PROVIDER: GSE247532 | GEO | 2023/12/13

REPOSITORIES: GEO

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Sexual dimorphism in melanocyte stem cell behavior reveals combinational therapeutic strategies for cutaneous repigmentation [scRNA-seq]

Project description:Vitiligo is an autoimmune skin disease caused by cutaneous melanocyte loss. Although phototherapy and T cell suppression therapy have been widely used to induce epidermal re-pigmentation, full pigmentation recovery is rarely achieved due to our poor understanding of the cellular and molecular mechanisms governing this process. Here, we identify unique melanocyte stem cell (McSC) epidermal migration rates between male and female mice, which is due to sexually dimorphic cutaneous inflammatory responses generated by ultra-violet B exposure. Using genetically engineered mouse models, and unbiased bulk and single-cell mRNA sequencing approaches, we determine that manipulating the inflammatory response through cyclooxygenase and its downstream prostaglandin product regulates McSC proliferation and epidermal migration in response to UVB exposure. Furthermore, we demonstrate that a combinational therapy that manipulates both macrophages and T cells (or innate and adaptive immunity) significantly promotes epidermal melanocyte re-population. With these findings, we propose a novel therapeutic strategy for repigmentation in patients with depigmentation conditions such as vitiligo.

2023-12-13 | GSE247694 | GEO

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Project description:A better understanding of human melanocyte and melanocyte stem cell (McSC) biology is essential for treating melanocyte-related diseases. This study employed an inherited pigmentation disorder carrying the SASH1S519N variant in a Hispanic family to investigate the SASH1 function in melanocyte lineage and the underlying mechanism for this disorder. We used a multidisciplinary approach, including clinical exams, human cell assays, yeast two-hybrid screening, and biochemical techniques. Results linked early hair graying to the SASH1S519N variant, a previously unrecognized clinical phenotype in hyperpigmentation disorders. We identified SASH1 as a novel regulator in McSC maintenance and discovered that TNKS2 is crucial for SASH1’s role in vitro. Additionally, the S519N variant is located in one of multiple tankyrase binding motifs and alters the binding kinetics and affinity of the interaction. In summary, this disorder showcases accelerated aging in human McSC, linking both gain and loss of pigmentation to McSC dysfunction in the same individuals. The findings offer new insights into the roles of SASH1 and TNKS2 in McSC maintenance and the molecular mechanisms of pigmentation disorders. We propose that a comprehensive clinical evaluation of patients with skin disorders should include an assessment and history of hair pigmentation loss.

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Expression data from treatment of human melanocytes with phenolic compounds

Project description:Vitiligo, an acquired disorder characterized by depigmented skin patches, results from loss of epidermal melanocytes. Etiology of vitiligo is not clearly understood but environmental, biochemical, genetic, and immune factors play a role in its pathogenesis. There is evidence that melanocyte death is perpetuated by an autoimmune response that causes lesions to spread. 4-tertiary butyl phenol (4TBP) and monobenzyl ether of hydroquinone (MBEH) are phenolic compounds that are known as environmental causes of vitiligo. We used microarray to detail the global gene expression that occurs following exposure of melanocytes to 4-TBP or MBEH to identified distinct classes of up-regulated genes that may contribute to melanocyte loss in vitiligo. We show that human melanocytes exposed to 4-TBP and MBEH show increased production of some inflammatory cytokines. Interleukin-6 (IL6) and IL8, in particular, are expressed at the periphery of vitiligo lesions and may contribute to recruitment of immune components to the areas, perpetuating melanocyte loss. Cultured human epidermal melanocytes were treated with 4TBP or MBEH for 3, 6, or 24 hours and gene expression were compared with untreated cells.

2012-12-01 | E-GEOD-31641 | biostudies-arrayexpress

Sexual dimorphism in melanocyte stem cell behavior reveals combinational therapeutic strategies for cutaneous repigmentation

Project description:Sexual dimorphism in melanocyte stem cell behavior reveals combinational therapeutic strategies for cutaneous repigmentation

| PRJNA1040181 | ENA

Expression data from treatment of human melanocytes with phenolic compounds

2012-12-01 | GSE31641 | GEO

Genome-wide analysis of differential gene expression in human embryonic stem cell-derived central nervous system, neural crest, and progenitor populations over time

Project description:Melanocytes are pigment-producing cells of neural crest origin responsible for protecting the skin against UV-irradiation. Melanocyte dysfunction leads to pigmentation defects including albinism, vitiligo, and piebaldism and is a key feature of systemic pathologies such as Hermansky-Pudlak (HP) and Chediak-Higashi (CH) Syndromes. Pluripotent stem cell technology offers a novel approach for studying human melanocyte development and disease. Here we report that timed exposure to activators of WNT, BMP and EDN3 signaling triggers the sequential induction of neural crest and melanocyte precursor fates under dual-SMAD inhibition conditions. Using a SOX10::GFP hESC reporter line, we demonstrate that the temporal onset of WNT activation is particularly critical for human neural crest induction. Surprisingly, suppression of BMP signaling does reduce neural crest yield. Subsequent differentiation of hESC-derived melanocyte precursors under defined conditions yields pure populations of pigmented cells matching the molecular and functional properties of adult melanocytes. Melanocytes from patient-specific iPSCs faithfully reproduce the ultrastructural features of the HP- and CH-specific pigmentation defects with minimal variability across lines. Our data define a highly specific requirement for WNT signaling during neural crest induction and enable the generation of pure populations of hiPSC-derived melanocytes for faithful modeling of human pigmentation disorders. Total RNA obtained from a timecourse of Dual SMAD Inhibition (DSi), Neural Crest (NC), and Melanocyte (BE) differentiation of human embryonic stem cells in triplicate.

2013-06-01 | E-GEOD-45223 | biostudies-arrayexpress

Sexual dimorphism in melanocyte stem cell behavior reveals combinational therapeutic strategies for cutaneous repigmentation [RNA-Seq]

Project description:Sexual dimorphism in melanocyte stem cell behavior reveals combinational therapeutic strategies for cutaneous repigmentation [RNA-Seq]

| PRJNA1039300 | ENA

Sexual dimorphism in melanocyte stem cell behavior reveals combinational therapeutic strategies for cutaneous repigmentation [scRNA-seq]

Project description:Sexual dimorphism in melanocyte stem cell behavior reveals combinational therapeutic strategies for cutaneous repigmentation [scRNA-seq]

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