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Oral fibroblasts produce more HGF and KGF than skin fibroblasts in response to co-culture with keratinocytes

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Grøn B, Stoltze K, Andersson A, Dabelsteen E. Oral fibroblasts produce more HGF and KGF than skin fibroblasts in response to co-culture with keratinocytes. APMIS 2002;110:892–8.

The production of hepatocyte growth factor (HGF) and keratinocyte growth factor (KGF) in subepithelial fibroblasts from buccal mucosa, periodontal ligament, and skin was determined after co-culture with keratinocytes. The purpose was to detect differences between the fibroblast subpopulations that could explain regional variation in epithelial growth and wound healing. Normal human fibroblasts were cultured on polystyrene or maintained in collagen matrix and stimulated with keratinocytes cultured on membranes. The amount of HGF and KGF protein in the culture medium was determined every 24 h for 5 days by ELISA. When cultured on polystyrene, the constitutive level of KGF and HGF in periodontal fibroblasts was higher than the level in buccal and skin fibroblasts. In the presence of keratinocytes, all three types of fibroblasts in general increased their HGF and KGF production 2–3 times. When cells were maintained in collagen, the level of HGF and KGF was decreased mainly in skin cultures. However, in oral fibroblasts, induction after stimulation was at a similar level in collagen compared to on polystyrene. Skin fibroblasts maintained in collagen produced almost no HGF whether with or without stimulation. The results demonstrate that the secretion of KGF and HGF in both unstimulated fibroblasts and in fibroblasts co-cultured with keratinocytes is dependent on the type of fibroblasts. In general, the periodontal fibroblasts had the highest level of cytokine production. This high level of growth factor production may influence the proliferation and the migration of junctional epithelium and thereby influence the development of periodontal disease.
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Keywords: HGF; KGF; co-culture; fibroblasts

Document Type: Research Article

Affiliations: 1: Department of Periodontology, School of Dentistry, Faculty of Health Sciences, Copenhagen, 2: Privathospitalet Hamlet, Copenhagen, and 3: Department of Oral Diagnostics, School of Dentistry, Faculty of Health Sciences, Copenhagen, Denmark

Publication date: 2002-12-01

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