Loss of MC1R signaling implicates TBX3 in pheomelanogenesis and melanoma predisposition

The human Red Hair Color (RHC) trait is caused by increased pheomelanin (red-yellow) and reduced eumelanin (black-brown) pigment in skin and hair due to diminished melanocortin 1 receptor (MC1R) function. In addition, individuals harboring the RHC trait are predisposed to melanoma development. While...

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Veröffentlicht in:bioRxiv
Hauptverfasser: Berns, H Matthew, Watkins-Chow, Dawn E, Lu, Sizhu, Louphrasitthiphol, Pakavarin, Zhang, Tongwu, Brown, Kevin M, Moura-Alves, Pedro, Goding, Colin R, Pavan, William J
Format: Journal Article Paper
Sprache:Englisch
Veröffentlicht: United States Cold Spring Harbor Laboratory Press 13.03.2023
Cold Spring Harbor Laboratory
Ausgabe:1.2
Schlagworte:
Animal models
Genetics
Hair
Melanocortin
Melanocyte-stimulating hormone
Melanocytes
Melanoma
Phenotypes
Pheomelanin
Pigmentation
Risk factors
Senescence
melanoma
melanocortin 1 receptor (MC1R)
melanocytes
red hair color
TBX3
ISSN:2692-8205, 2692-8205
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Zusammenfassung:The human Red Hair Color (RHC) trait is caused by increased pheomelanin (red-yellow) and reduced eumelanin (black-brown) pigment in skin and hair due to diminished melanocortin 1 receptor (MC1R) function. In addition, individuals harboring the RHC trait are predisposed to melanoma development. While variants have been established as causative of RHC and are a well-defined risk factor for melanoma, it remains unclear mechanistically why decreased MC1R signaling alters pigmentation and increases melanoma susceptibility. Here, we use single-cell RNA-sequencing (scRNA-seq) of melanocytes isolated from RHC mouse models to reveal a Pheomelanin Gene Signature (PGS) comprising genes implicated in melanogenesis and oncogenic transformation. We show that TBX3, a well-known anti-senescence transcription factor implicated in melanoma progression, is part of the PGS and binds both E-box and T-box elements to regulate genes associated with melanogenesis and senescence bypass. Our results provide key insights into mechanisms by which MC1R signaling regulates pigmentation and how individuals with the RHC phenotype are predisposed to melanoma.
Bibliographie:SourceType-Working Papers-1
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Competing Interest Statement: The authors have declared no competing interest.
ISSN:2692-8205
2692-8205
DOI:10.1101/2023.03.10.532018