Objective.To explore the expression characteristic of fibronectin gene in hypertr ophic scars and diabetic ul-cer tissues.Methods.The biopsies from normal skins

hypertrophic scars and diabetic foot ulc ers were taken.The tech-nique of quantitative polymerase ch ain reaction（PCR）was used to evaluate the gene express ion of fibronectin in the above biopsies.Results.Fibronectin gene expression was enhanced in hypertrophic scars and decreased in diabetic foot ul-cers compared with that in normal ski ns.Quantitative comparison showed about 2-fold increase of fibronectin mR-NA level in hypertrophic scars and ab out 3-fold decrease of fibronectin mRNA level in diabetic ulcers as com-pared with that in normal skins.Conclusions.Fibronectin gene expression is influenced by the tissue environment.Di fferent expression and synthesis of fibronectin may cause d ifferent outcomes in wound healing.