Reciprocal regulation of 12- and 15-lipoxygenases by UV-irradiation in human keratinocytes

Hyun Yoo, Byeongwook Jeon, Myung Shin Jeon, Hyangkyu Lee, Tae Yoon Kim

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


The 12/15-lipoxygenase (12/15-LOX) pathways of arachidonate metabolism have been implicated in the pathogenesis of psoriasis. Since UV photo-therapy is a commonly used technique for inhibiting cell proliferation and inflammation in skin diseases, we hypothesized that UV-irradiation may affect 12/15-LOX expression which might regulate cell proliferation. In this study, we showed that UV-irradiation suppressed 12-LOX expression, whereas up-regulated 15-LOX expression. Treatment with the 15-LOX metabolites sufficiently suppressed insulin-like growth factor II-induced 12-LOX expression and blocked cell cycle progression. On the basis of our findings, we think that the 15-LOX metabolites may inhibit epidermal hyperplasia in psoriasis by regulating 12-LOX expression.

Original languageEnglish
Pages (from-to)3249-3253
Number of pages5
JournalFEBS Letters
Issue number21-22
Publication statusPublished - 2008 Sept 22

Bibliographical note

Funding Information:
This work was supported by a Next Generation Growth Engine Program Grant (M10416020002-05N1602) from the Korean Science and Engineering Foundation and the Korean Ministry of Science and Technology. We thank Prof. N. Fusenig for providing the HaCaT cells.

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology


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