The myofibroblast in wound healing and fibrocontractive diseases, 2003
Topics: α-smooth muscle actin, stress fibres, inflammation, TGF-β1 fibronectin, tension
Authors: G Gabbiani
The demonstration that fibroblastic cells acquire contractile features during the healing of an open wound, thus modulating into myofibroblasts, has open a new perspective in the understanding of mechanisms leading to wound closure and fibrocontractive diseases. Myofibroblasts synthesize extracellular matrix components such as collagen types I and III and during normal wound healing disappear by apoptosis when epithelialization occurs. The transition from fibroblasts to myofibroblasts is influenced by mechanical stress, TGF-beta and cellular fibronectin (ED-A splice variant). These factors also play important roles in the development of fibrocontractive changes, such as those observed in liver cirrhosis, renal fibrosis, and stroma reaction to epithelial tumours.
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