Interleukin (IL)-19 promoted skin wound healing by increasing fibroblast keratinocyte growth factor expression

Ding Ping Sun, Ching Hua Yeh, Edmund So, Li Yun Wang, Tsui Shan Wei, Ming Shi Chang, Chung Hsi Hsing

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Background: Interleukin (IL)-19, a member of the IL-10 cytokine family, is involved in keratinocyte proliferation in psoriasis. Objectives: We investigated the role of IL-19 in the wound-healing process in vivo and in vitro. Methods: Two full-thickness circular wounds (4. mm in diameter) were punched into the skin of BALB/C mice. IL-19 and keratinocyte growth factor (KGF) mRNA in wounded skin were determined using real-time PCR. The wounds were treated with PBS, vehicle, IL-19 (400. ng/mL), or IL-20 (400. ng/mL) (. n=. 6 in each group) twice daily and the percentage of wound healing was measured daily for 7. days. In vitro, human skin fibroblast CCD966-SK cells and keratinocyte HaCaT cells were treated with IL-19 or KGF. Cell proliferation and migration were determined using bromodeoxyuridine (BrdU) and transwell assays, respectively. The expression of IL-19 and KGF mRNA was also analyzed. Results: In wounded mouse skin, IL-19 mRNA was upregulated at 12. h, and KGF at 24. h after the injury. Both increases in gene expression declined 72. h after the skin had been wounded. The percentage of wound healing in IL-19-treated mice was higher than in control mice. In vitro, IL-19 upregulated KGF expression in the CCD966-SK cells; IL-19 was upregulated in KGF-treated HaCaT cells. KGF but not IL-19 promoted HaCaT cell proliferation. However, IL-19 significantly increased the migration of HaCaT cells. HaCaT cells treated with the cultured supernatants of IL-19-stimulated CCD966-SK cells showed significantly more proliferation than in controls. Conclusions: IL-19 is important for cutaneous wound healing because it upregulates KGF expression.

Original languageEnglish
Pages (from-to)360-368
Number of pages9
JournalCytokine
Volume62
Issue number3
DOIs
Publication statusPublished - 2013 Jun

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology
  • Biochemistry
  • Hematology
  • Molecular Biology

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