Cutaneous wound healing through paradoxical MAPK activation by BRAF inhibitors.


Journal Article

BRAF inhibitors are highly effective therapies for the treatment of BRAF(V600)-mutated melanoma, with the main toxicity being a variety of hyperproliferative skin conditions due to paradoxical activation of the mitogen-activated protein kinase (MAPK) pathway in BRAF wild-type cells. Most of these hyperproliferative skin changes improve when a MEK inhibitor is co-administered, as it blocks paradoxical MAPK activation. Here we show how the BRAF inhibitor vemurafenib accelerates skin wound healing by inducing the proliferation and migration of human keratinocytes through extracellular signal-regulated kinase (ERK) phosphorylation and cell cycle progression. Topical treatment with vemurafenib in two wound-healing mice models accelerates cutaneous wound healing through paradoxical MAPK activation; addition of a mitogen-activated protein kinase kinase (MEK) inhibitor reverses the benefit of vemurafenib-accelerated wound healing. The same dosing regimen of topical BRAF inhibitor does not increase the incidence of cutaneous squamous cell carcinomas in mice. Therefore, topical BRAF inhibitors may have clinical applications in accelerating the healing of skin wounds.

Full Text

Duke Authors

Cited Authors

  • Escuin-Ordinas, H; Li, S; Xie, MW; Sun, L; Hugo, W; Huang, RR; Jiao, J; de-Faria, FM; Realegeno, S; Krystofinski, P; Azhdam, A; Komenan, SMD; Atefi, M; Comin-Anduix, B; Pellegrini, M; Cochran, AJ; Modlin, RL; Herschman, HR; Lo, RS; McBride, WH; Segura, T; Ribas, A

Published Date

  • August 2016

Published In

Volume / Issue

  • 7 /

Start / End Page

  • 12348 -

PubMed ID

  • 27476449

Pubmed Central ID

  • 27476449

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

International Standard Serial Number (ISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/ncomms12348


  • eng