Small cytoskeleton-associated molecule, fibroblast growth factor receptor 1 oncogene partner 2/wound inducible transcript-3.0 (FGFR1OP2/wit3.0), facilitates fibroblast-driven wound closure

Am J Pathol. 2010 Jan;176(1):108-21. doi: 10.2353/ajpath.2010.090256. Epub 2009 Dec 3.

Abstract

Wounds created in the oral cavity heal rapidly and leave minimal scarring. We have examined a role of a previously isolated cDNA from oral wounds encoding wound inducible transcript-3.0 (wit3.0), also known as fibroblast growth factor receptor 1 oncogene partner 2 (FGFR1OP2). FGFR1OP2/wit3.0 was highly expressed in oral wound fibroblasts without noticeable up-regulation of alpha-smooth muscle actin. In silico analyses, denaturing and nondenaturing gel Western blot, and immunocytology together demonstrated that FGFR1OP2/wit3.0 were able to dimerize and oligomerize through coiled-coil structures and appeared to associate with cytoskeleton networks in oral wound fibroblasts. Overexpression of FGFR1OP2/wit3.0 increased the floating collagen gel contraction of naïve oral fibroblasts to the level of oral wound fibroblasts, which was in turn attenuated by small-interfering RNA knockdown. The FGFR1OP2/wit3.0 synthesis did not affect the expression of collagen I as well as procontractile peptides such as alpha-smooth muscle actin, and transforming growth factor-beta1 had no effect on FGFR1OP2/wit3.0 expression. Fibroblastic cells derived from embryonic stem cells carrying FGFR1OP2/wit3.0 (+/-) mutation showed significant retardation in cell migration. Thus, we postulate that FGFR1OP2/wit3.0 may regulate cell motility and stimulate wound closure. FGFR1OP2/wit3.0 was not up-regulated during skin wound healing; however, when treated with FGFR1OP2/wit3.0 -expression vector, the skin wound closure was significantly accelerated, resulting in the limited granulation tissue formation. Our data suggest that FGFR1OP2/wit3.0 may possess a therapeutic potential for wound management.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Base Sequence
  • Cell Movement / drug effects
  • Collagen / metabolism
  • Cytoskeletal Proteins / genetics
  • Cytoskeletal Proteins / metabolism*
  • Cytoskeleton / drug effects
  • Cytoskeleton / metabolism*
  • Fibroblasts / drug effects
  • Fibroblasts / metabolism*
  • Fibroblasts / pathology*
  • Gels
  • Gene Knockdown Techniques
  • Humans
  • Mice
  • Molecular Sequence Data
  • Mouth Mucosa / drug effects
  • Mouth Mucosa / metabolism
  • Mouth Mucosa / pathology
  • Mutation / genetics
  • Myosin Heavy Chains / genetics
  • Myosin Heavy Chains / metabolism*
  • Polymorphism, Single Nucleotide / genetics
  • Protein Transport / drug effects
  • Proteins / genetics
  • Proteins / metabolism*
  • RNA, Small Interfering / metabolism
  • Rats
  • Transforming Growth Factor beta1 / pharmacology
  • Wound Healing* / drug effects

Substances

  • Cytoskeletal Proteins
  • FGFR1OP2 protein, mouse
  • Gels
  • Proteins
  • RNA, Small Interfering
  • Transforming Growth Factor beta1
  • wit 3.0 protein, human
  • wound-inducible transcript 3.0, rat
  • Collagen
  • Myosin Heavy Chains