Cited by 27Genomics, phytochemicals, and oxidative stressSkin Protection and AgingRedox biology and oxidative stress

Ultraviolet B irradiation induced Nrf2 degradation occurs via activation of TRPV1 channels in human dermal fibroblasts

Huang, Kuo-Feng, Ma, Kuo-Hsing, Jhap, Tian-You, Liu, Pei-Shan, Chueh, Sheau-Huei·2019·Free Radical Biology and Medicine

Abstract

Ultraviolet (UV) irradiation causes cellular oxidative stress. Under redox imbalance, Keap1-dependent Nrf2 degradation is minimal. In this study, we examined the role of Ca 2+ in Nrf2 homeostasis after UVB irradiation using human dermal fibroblasts. UVB irradiation stimulates 12-lipoxygenase and the product 12-hydroxyeicosatetraenoic acid then activates TRPV1 increasing the cell's cytosolic Ca 2+ concentration. UVB irradiation induced reactive oxygen species generation and apoptosis are inhibited in the absence of Ca 2+ or in the presence of either a 12-lipoxygenase inhibitor or a TRPV1 inhibitor during and after UVB irradiation. Thus, the Ca 2+ increase via TRPV1 is a critical factor in UVB irradiation induced oxidative stress. UVB irradiation induces a Ca 2+ dependent Nrf2 degradation and thus activation of TRPV1 with 12-hydroxyeicosatetraenoic acid also decreasing Nrf2 levels. UVB irradiation induced Nrf2 degradation is inhibited by co-treatment of cells with W-7, cyclosporin A, SB-216763 or MG-132, which are inhibitors of calmodulin, calcineurin, GSK3β and the proteasome, respectively. Furthermore, UVB irradiation in parallel induces GSK3β dephosphorylation in a Ca 2+ dependent manner. Co-immunoprecipitation showed that UVB irradiation induces an increase in Nrf2 phosphorylation, an increase in the binding of β-TrCP and Nrf2, and an increase in Nrf2 ubiquitination; these effects are all Ca 2+ dependent. These findings suggest that UVB irradiation induced GSK3β activation in a Ca 2+ dependent manner, which then stimulates the phosphorylation and ubiquitination of Nrf2 via β-TrCP. Indeed, silencing of β-TrCP was found to inhibit UVB irradiation-induced oxidative stress, Nrf2 degradation and apoptosis, while it had no effect on the Ca 2+ increase. Taken together, our results suggest that a Ca 2+ influx via TRPV1 is responsible for UVB irradiation-induced Nrf2 degradation and that modulation of the Ca 2+-calmodulin-calcineurin-GSK3β-Nrf2-β-TrCP-Cullin-1 pathway may explain Ca 2+ dependent Nrf2 degradation.

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Crossref · 10.1016/j.freeradbiomed.2019.06.020

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  • In human dermal fibroblasts, UVB irradiation causes Ca2+ increase via TRPV1, induces Nrf2 degradation, leads to imbalance of intracellular redox homeostasis, and brings about skin photoaging.

    “In human dermal fibroblasts, UVB irradiation causes a Ca2+ increase via TRPV1, induces nuclear factor-E2-related factor 2 (Nrf2) degradation, leads to an imbalance of intracellular redox homeostasis, and brings about skin photoaging finally [90] (Figure 1).”

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Authors
Huang, K.-F., Ma, K.-H., Jhap, T.-Y., Liu, P.-S., & Chueh, S.-H.
Affiliations
  • Chi Mei Medical Center (TW)
  • National Defense Medical Center (TW)
  • Soochow University (TW)
Corresponding author
Chueh, Sheau-Huei
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
2019-09
Volume
141
Pages
220-232
ISSN
0891-5849 (ISSN-L)
OpenAlex
W2950541032
Cited by
27
References
60
Citations by year
2026: 5 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 5 · 2021: 11 · 2020: 1
FWCI
1.41
Type
journal article
Language
en
Open access
closed
Locations
  • Free Radical Biology and Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
Chi Mei Medical Center
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics, phytochemicals, and oxidative stress
  • Health Sciences › Medicine › Dermatology › Skin Protection and Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
UVB irradiation, Nrf2 degradation, TRPV1 channel, calcium signaling, oxidative stress, 12-lipoxygenase, 12-hydroxyeicosatetraenoic acid, GSK3β, β-TrCP, Nrf2 ubiquitination, Nrf2 phosphorylation, CUL1, apoptosis, dermal fibroblasts
MeSH terms
Glycogen Synthase Kinase 3 beta, Antioxidants, Calcium, Fibroblasts, Free Radicals, Humans, Phosphorylation, Skin, Ultraviolet Rays, Apoptosis, Reactive Oxygen Species, Calcineurin, Proteasome Endopeptidase Complex, Cell Proliferation, TRPV Cation Channels, NF-E2-Related Factor 2

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