Urban particulate matters induce EGR-1 expression in keratinocytes which correlates with the severity of psoriasis

Tae Jun Park, Haneul Oh, Min Gyu Kim, Jaehyung Kim, Hee Joo Kim, Sang Wook Son

Research output: Contribution to journalArticlepeer-review


Background: Early growth response protein (Egr)-1 is a transcription factor important for cell growth and initiation of immune responses. It is significantly up-regulated in psoriatic skin. Objective: We evaluated the differential expression of Egr-1 in skin lesions of plaque psoriasis and its correlation with the severity of psoriasis. We also used in vitro methods in normal keratinocytes to analyze if urban particulate matter influences Egr-1 expression. Results: Egr-1 was significantly up-regulated in the psoriatic skin, specifically in the stratum basale. Its expression was positively correlated with the severity of psoriasis (ρ = 0.497, P = 0.013). It was also significantly up-regulated in keratinocytes with exposure to urban particulate matters under in vitro condition. Conclusion: Up-regulated expression of Egr-1 in the epidermis suggests that it plays a role in psoriasis by accelerating epidermal cell replication, to which could be attributed by urban particulate matter.

Original languageEnglish
Pages (from-to)195-200
Number of pages6
JournalMolecular and Cellular Toxicology
Issue number2
Publication statusPublished - 2021 Apr

Bibliographical note

Publisher Copyright:
© 2021, The Korean Society of Toxicogenomics and Toxicoproteomics.


  • Early growth response protein 1
  • Psoriasis
  • Urban particulate matter

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • General Pharmacology, Toxicology and Pharmaceutics
  • Health, Toxicology and Mutagenesis
  • Pathology and Forensic Medicine
  • Toxicology


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