Erbb2 regulates inflammation and proliferation in the skin after ultraviolet irradiation

Justin G. Madson, David T. Lynch, Kelsey L. Tinkum, Sumanth K. Putta, Laura A. Hansen

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Exposure to ultraviolet (UV) irradiation is the major cause of nonmelanoma skin cancer, the most common form of cancer in the United States. UV irradiation has a variety of effects on the skin associated with carcinogenesis, including DNA damage and effects on signal transduction. The alterations in signaling caused by UV regulate inflammation, cell proliferation, and apoptosis. UV also activates the orphan receptor tyrosine kinase and proto-oncogene Erbb2 (HER2/neu). In this study, we demonstrate that the UV-induced activation of Erbb2 regulates the response of the skin to UV. Inhibition or knockdown of Erbb2 before UV irradiation suppressed cell proliferation, cell survival, and inflammation after UV. In addition, Erbb2 was necessary for the UV-induced expression of numerous proinflammatory genes that are regulated by the transcription factors nuclear factor-κB and Comp1, including interleukin-1β, prostaglandinendoperoxidase synthase 2 (Cyclooxygenase-2), and multiple chemokines. These results reveal the influence of Erbb2 on the UV response and suggest a role for Erbb2 in UV-induced pathologies such as skin cancer.

Original languageEnglish (US)
Pages (from-to)1402-1414
Number of pages13
JournalAmerican Journal of Pathology
Volume169
Issue number4
DOIs
StatePublished - Oct 2006

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine

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