PMID- 1431230 OWN - NLM STAT- MEDLINE DCOM- 19921207 LR - 20190723 IS - 0022-202X (Print) IS - 0022-202X (Linking) VI - 99 IP - 5 DP - 1992 Nov TI - Keloid fibroblasts exhibit an altered response to TGF-beta. PG - 650-5 AB - Treatment with transforming growth factor beta 1 (TGF-beta 1) results in stimulation of total protein synthesis in normal dermal fibroblasts but not in keloid fibroblasts, suggesting that the TGF-beta regulatory program is altered in keloid fibroblasts. However, both keloid and normal fibroblasts treated with TGF-beta 1 exhibit accelerated fibronectin biosynthesis, indicating that keloid cells can respond to TGF-beta 1. In the absence of serum, the TGF-beta 1-induced increase in fibronectin biosynthesis occurs more rapidly in keloid fibroblasts, also suggesting modification of this regulatory pathway. The TGF-beta 1-mediated increase in keloid fibronectin production is independent of the steroid regulatory pathway for fibronectin, which accelerates synthesis by means of a post-transcriptional mechanism. Thus, TGF-beta 1 stimulation of fibronectin production in keloid cells is likely to involve a transcriptional mechanism and keloid overproduction of extracellular matrix components may be due to an inherent modification of the TGF-beta regulatory program. FAU - Babu, M AU - Babu M AD - Department of Anatomy and Cell Biology, Tufts University School of Medicine, Boston, MA 02111. FAU - Diegelmann, R AU - Diegelmann R FAU - Oliver, N AU - Oliver N LA - eng GR - CA43860/CA/NCI NIH HHS/United States GR - GM20298/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Invest Dermatol JT - The Journal of investigative dermatology JID - 0426720 RN - 0 (Transforming Growth Factor beta) SB - IM MH - Adolescent MH - Adult MH - Cell Line, Transformed MH - Female MH - Fibroblasts/drug effects MH - Gene Expression Regulation MH - Humans MH - Keloid/*pathology MH - Male MH - Middle Aged MH - Transforming Growth Factor beta/genetics/*pharmacology EDAT- 1992/11/01 00:00 MHDA- 1992/11/01 00:01 CRDT- 1992/11/01 00:00 PHST- 1992/11/01 00:00 [pubmed] PHST- 1992/11/01 00:01 [medline] PHST- 1992/11/01 00:00 [entrez] AID - S0022-202X(92)90695-Z [pii] AID - 10.1111/1523-1747.ep12668146 [doi] PST - ppublish SO - J Invest Dermatol. 1992 Nov;99(5):650-5. doi: 10.1111/1523-1747.ep12668146.