Factors influencing myofibroblast differentiation during wound healing and fibrosis

Cell Biol Int. 1995 May;19(5):471-6. doi: 10.1006/cbir.1995.1090.


Granulation tissue fibroblasts (myofibroblasts) develop several ultrastructural and biochemical features of smooth muscle (SM) cells, including the presence of microfilaments bundles and the expression of alpha-SM actin, the actin isoform typical of contractile vascular SM cells. Myofibroblasts have been suggested to play a role in wound contraction and in retractile phenomena observed during fibrotic diseases. When granulation tissue evolves into a scar, myofibroblasts containing alpha-SM actin disappear, probably as a result of apoptosis. In contrast myofibroblasts expressing alpha-Sm actin persist in excessive scarring and in fibrotic conditions. The mechanisms leading to the development of myofibroblastic features remain to be investigated. Studies on the factors regulating the phenotype of myofibroblasts will be necessary for understanding their behavior in vivo, and possibly modifying this behavior during the different clinical settings.

Publication types

  • Review

MeSH terms

  • Animals
  • Cytokines / pharmacology
  • Cytokines / physiology*
  • Cytoskeleton / physiology
  • Cytoskeleton / ultrastructure
  • Extracellular Matrix / drug effects
  • Extracellular Matrix / physiology
  • Fibroblasts / drug effects
  • Fibroblasts / pathology
  • Fibroblasts / physiology
  • Fibrosis
  • Growth Substances / pharmacology
  • Growth Substances / physiology*
  • Humans
  • Muscle, Smooth / cytology*
  • Muscle, Smooth / pathology*
  • Wound Healing*


  • Cytokines
  • Growth Substances