Stepping up melanocytes to the challenge of UV exposure
Abstract
Exposure to solar ultraviolet radiation (UV) is the main etiological factor for skin cancer, including melanoma. Cutaneous pigmentation, particularly eumelanin, afforded by melanocytes is the main photoprotective mechanism, as it prevents UV-induced DNA damage in the epidermis. Therefore, maintaining genomic stability of melanocytes is crucial for prevention of melanoma, as well as keratinocyte-derived basal and squamous cell carcinoma. A critical independent factor for preventing melanoma is DNA repair capacity. The response of melanocytes to UV is mediated mainly by a network of paracrine factors that not only activate melanogenesis, but also DNA repair, anti-oxidant, and survival pathways that are pivotal for maintenance of genomic stability and prevention of malignant transformation or apoptosis. However, little is known about the stress response of melanocytes to UV and the regulation of DNA repair pathways in melanocytes. Unraveling these mechanisms might lead to strategies to prevent melanoma, as well as non-melanoma skin cancer.
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A therapeutic dosage of UV can induce cell cycle arrest, activate antioxidant and DNA repair enzymes, and induce apoptosis through translocation of Bcl-2 family proteins in melanocytes to ensure genomic integrity and survival of melanocytes.
“Analogous to its effect in keratinocytes, a therapeutic dosage of UV can induce cell cycle arrest, activate antioxidant and DNA repair enzymes, and induce apoptosis through translocation of the Bcl-2 family proteins in melanocytes to ensure genomic integrity and survival of melanocytes.”
From Molecular Mechanisms of UV-Induced Apoptosis and Its Effects on Skin Residential Cells: The Implication in UV-Based Phototherapy (2013) · cites this paper as [76]
Similar to keratinocytes, UV induces cell cycle arrest, activation of antioxidant and DNA repair enzymes, and regulation of apoptotic pathways in melanocytes, to ensure genomic integrity and survival of melanocytes.
“Similar to that seen in keratinocytes, UV induces cell cycle arrest, activation of antioxidant and DNA repair enzymes, and regulation of apoptotic pathways in melanocytes, to ensure genomic integrity and survival of melanocytes [76].”
From Molecular Mechanisms of UV-Induced Apoptosis and Its Effects on Skin Residential Cells: The Implication in UV-Based Phototherapy (2013) · cites this paper as [76]
Exposure of the skin to UV results in increased synthesis of paracrine factors such as ACTH, endothelin-1, β-FGF, and α-MSH, which mediate the UV response of human melanocytes.
“Several studies have reported that exposure of the skin to UV results in increased synthesis of paracrine factors, such as ACTH, endothelin-1, β-FGF, and α-MSH, which play an important role in mediating the UV response of human melanocytes [76].”
From Molecular Mechanisms of UV-Induced Apoptosis and Its Effects on Skin Residential Cells: The Implication in UV-Based Phototherapy (2013) · cites this paper as [76]
UV can induce the activation of transcription factors USF-1, Mitf, ATF-2, Nrf-2 and p53, and inhibition of NFκB.
“In addition to the induction of paracrine factors, UV can induce the activation of the transcription factors USF-1, Mitf, ATF-2, Nrf-2 and p53, and inhibition of NFκB [76].”
From Molecular Mechanisms of UV-Induced Apoptosis and Its Effects on Skin Residential Cells: The Implication in UV-Based Phototherapy (2013) · cites this paper as [76]
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- Authors
- Abdel-Malek, Z. A., Kadekaro, A. L., & Swope, V. B.
- Affiliations
- University of Cincinnati (US)
- Venue
- Pigment Cell & Melanoma Research
- Publisher
- Wiley
- Published
- 2010-02-01
- Volume
- 23
- Issue
- 2
- Pages
- 171-186
- ISSN
- 1755-1471 (ISSN-L)
- OpenAlex
- W1562209821
- Cited by
- 134
- References
- 17
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 7 · 2023: 10 · 2022: 6 · 2021: 5 · 2020: 4 · 2019: 9 · 2018: 11 · 2017: 8 · 2016: 11 · 2015: 11 · 2014: 7 · 2013: 9 · 2012: 15
- FWCI
- 1.23
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Pigment Cell & Melanoma Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Cancer Institute (R01CA114095)
- National Institute of Environmental Health Sciences (P30ES006096, R01ES017561, R01ES009110)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › melanin and skin pigmentation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
- Keywords
- melanocytes, ultraviolet radiation, melanoma, DNA repair, genome stability, eumelanin, skin pigmentation, melanogenesis, paracrine signaling, non-melanoma skin cancer, UV-induced DNA damage, photoprotection, malignant transformation, apoptosis
- MeSH terms
- Animals, DNA Damage, DNA Repair, Humans, Melanocytes, Melanoma, Skin Neoplasms, Ultraviolet Rays, Genomic Instability
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