Melanocytes evolved to produce the melanin that gives colour to our hair, eyes and skin. The melanocyte lineage also gives rise to melanoma, the most lethal form of skin cancer. The melanocyte lineage differentiates from neural crest cells during development, and most melanocytes reside in the skin and hair, where they are replenished by melanocyte stem cells. Because the molecular mechanisms necessary for melanocyte specification, migration, proliferation and differentiation are co-opted during melanoma initiation and progression, studying melanocyte development is directly relevant to human disease. Here, through the lens of advances in cellular omic and genomic technologies, we review the latest findings in melanocyte development and differentiation, and how these developmental pathways become dysregulated in disease.
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http://dx.doi.org/10.1242/dev.201266 | DOI Listing |
Cell Mol Life Sci
January 2025
Department of Anesthesiology, Shenzhen Children's Hospital, Yitian Road 7019, Shenzhen, 518000, China.
Hair follicle (HF) development and pigmentation are complex processes governed by various signaling pathways, such as TGF-β and FGF signaling pathways. Nestin + (neural crest like) stem cells are also expressed in HF stem cells, particularly in the bulge and dermal papilla region. However, the specific role and differentiation potential of these Nestin-positive cells within the HF remain unclear, especially regarding their contribution to melanocyte formation and hair pigmentation.
View Article and Find Full Text PDFJ Cutan Pathol
January 2025
Department of Anatomical Pathology, Dorevitch Pathology, Heidelberg, Victoria, Australia.
Melanomas show a wide spectrum of clinical, morphological, immunohistochemical, and molecular features, which can impact treatment and prognosis. Dedifferentiated and transdifferentiated melanomas (DTM) are defined as melanomas which have lost conventional melanocytic morphologic and immunohistochemical features, showing sarcomatous morphology and/or immunohistochemical staining of other cell lineages, and as such, can be mistaken for other entities such as collision tumors and undifferentiated spindle cell tumors. In this series, we highlight the utility of preferentially expressed antigen in melanomas (PRAME) in diagnosing undifferentiated/dedifferentiated melanomas.
View Article and Find Full Text PDFExp Eye Res
December 2024
Department of Medical Genetics, University of British Columbia, Life Sciences Institute, 2350 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada. Electronic address:
The Mitf transcription factor is a critical regulator of the melanocyte lineage and eye development. Mitf activity in different cell types is controlled in part by ten alternative promoters and their resulting isoforms. A useful tool for melanocyte-based research, Mitf-cre was designed to express Cre from the Mitf-M promoter, which is melanocyte specific.
View Article and Find Full Text PDFDevelopment
November 2024
Laboratory of Developmental Cell Biology and Disease, State Key Laboratory of Ophthalmology, Optometry and Visual Science, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.
J Oral Biosci
October 2024
Department of Stem Cell and Regenerative Medicine, Gifu University Graduate School of Medicine, 1-1, Yanagido, Gifu, 501-1194, Japan.
Objectives: The receptor tyrosine kinase Kit is expressed in cells derived from the trunk neural crest (NC), such as melanocytes; however, its role in cranial NC cell development is not fully understood.
Methods: We investigated the effects of the heterozygous loss of Kit in NC cells during embryonic development by mating Kit mice with Wnt1-Cre mice to produce Wnt1-Cre; Kit embryos. In addition, Wnt1-Cre mice were mated with Rosa26R-yellow fluorescent protein (YFP) mice to visualize the tissue regions expressing Cre recombinase.
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