Regulation of fibroblast-mediated collagen gel contraction by platelet-derived growth factor, interleukin-1 alpha and transforming growth factor-beta 1
We have examined the effects of three macrophagederived cytokines, platelet-derived growth factor (PDGF), transforming growth factor-01 (TGF-01) and interleukin-1 a (IL-la) on the contraction of collagen type I gels populated by human foreskin fibroblasts. Contraction was quantified as loss in gel weight. Both PDGF-AA and PDGF-BB were found to induce a rapid collagen-gel contraction. TGF-/J1 also
