SerpinB2 is involved in cellular response upon UV irradiation

Sci Rep. 2019 Feb 26;9(1):2753. doi: 10.1038/s41598-019-39073-w.

Abstract

Ultraviolet light induced pyrimidine dimer is a helix distortion DNA damage type, which recruits repair complexes. However, proteins of these complexes that take part in both DNA damage recognition and repair have been well-described, the regulation of the downstream steps of nucleotide excision repair (NER) have not been clearly clarified yet. In a high-throughput screen, we identified SerpinB2 (SPB2) as one of the most dramatically upregulated gene in keratinocytes following UV irradiation. We found that both the mRNA and the protein levels of SPB2 were increased upon UV irradiation in various cell lines. Additionally, UV damage induced translocation of SPB2 from the cytoplasm to the nucleus as well as the damage induced foci formation of it. Here we show that SPB2 co-localizes with XPB involved in the NER pathway at UV-induced repair foci. Finally, we demonstrated that UV irradiation promoted the association of SPB2 with ubiquitylated proteins. In basal cell carcinoma tumour cells, we identified changes in the subcellular localization of SPB2. Based on our results, we conclude that SPB2 protein has a novel role in UV-induced NER pathway, since it regulates the removal of the repair complex from the damaged site leading to cancerous malformation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bone Neoplasms / etiology
  • Bone Neoplasms / pathology
  • Carcinoma, Basal Cell / etiology
  • Carcinoma, Basal Cell / pathology
  • DNA Damage*
  • DNA Helicases / genetics
  • DNA Helicases / metabolism
  • DNA Repair*
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism
  • Humans
  • Melanoma / etiology
  • Melanoma / pathology*
  • Osteosarcoma / etiology
  • Osteosarcoma / pathology*
  • Plasminogen Activator Inhibitor 2 / genetics
  • Plasminogen Activator Inhibitor 2 / metabolism*
  • Pyrimidine Dimers
  • Tumor Cells, Cultured
  • Ultraviolet Rays / adverse effects*

Substances

  • DNA-Binding Proteins
  • Plasminogen Activator Inhibitor 2
  • Pyrimidine Dimers
  • XPBC-ERCC-3 protein
  • DNA Helicases