Interleukin 6 indirectly induces keratinocyte migration

Randle M. Gallucci, Dusti K. Sloan, Julie M. Heck, Anne R. Murray, Sijy J. O'Dell

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129 Scopus citations


IL-6-deficient transgenic mice (IL-6 KO) display significantly delayed cutaneous wound healing. To further elucidate the role of IL-6 in skin wound healing, epidermal keratinocyte and dermal fibroblast cells were isolated from neonatal IL-6 KO mice and treated with rmIL-6. It was found that rmIL-6 alone did not significantly modulate the proliferation or migration of cultured IL-6 KO keratinocytes. rmIL-6, however, significantly induced the migration of IL-6 KO keratinocytes (up to 5-fold) when co-cultured with dermal fibroblasts. Culture supernatants from IL-6-treated fibroblasts were also found to induce the migration of keratinocytes to a similar degree. Genomics analysis of treated fibroblasts indicated that rmIL-6 does not induce any known soluble keratinocyte migratory factors. rmIL-6 treatment of fibroblast, however, induced a rapid and sustained phosphorylation of STAT3 protein. These data indicate that IL-6 could influence wound healing by inducing keratinocyte migration through the production of a soluble fibroblast-derived factor, and its activity may be associated with STAT3 activation.

Original languageEnglish
Pages (from-to)764-772
Number of pages9
JournalJournal of Investigative Dermatology
Issue number3
StatePublished - Mar 2004


  • Cytokines
  • Epidermis
  • Inflammation
  • Wound healinq


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