PMID- 2658990 OWN - NLM STAT- MEDLINE DCOM- 19890710 LR - 20190612 IS - 0006-291X (Print) IS - 0006-291X (Linking) VI - 160 IP - 3 DP - 1989 May 15 TI - Transforming growth factor alpha stimulates prostacyclin production by cultured human vascular endothelial cells more potently than epidermal growth factor. PG - 1100-5 AB - Transforming growth factor alpha (TGF alpha) induces dose- and time-dependent stimulation of prostacyclin (PGI2) production by cultured human umbilical vein endothelial cells. The lowest stimulatory concentration of TGF alpha was 0.1 ng/ml and the maximal response, a 2.7-fold rise, was obtained with 10 ng/ml. The stimulation, which lasted at least 24 h, was blocked by cycloheximide and by indomethacin. TGF alpha induced PGI2 production at 10-100 times lower concentrations than did epidermal growth factor (EGF), although in stimulating endothelial cell growth the two factors were equipotent. This is the first demonstration that TGF alpha enhances PGI2 production by human cells. Moreover, this is the first evidence that it acts as both an agonist (growth) and a superagonist (PGI2 production) of EGF in the same cell type. I suggest that this phenomenon may be involved with the angiogenic activity of TGF alpha. FAU - Ristimaki, A AU - Ristimaki A AD - Children's Hospital, University of Helsinki, Finland. LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 58962-34-8 (6-Ketoprostaglandin F1 alpha) RN - 62229-50-9 (Epidermal Growth Factor) RN - 76057-06-2 (Transforming Growth Factors) RN - 98600C0908 (Cycloheximide) RN - DCR9Z582X0 (Epoprostenol) RN - XXE1CET956 (Indomethacin) SB - IM MH - 6-Ketoprostaglandin F1 alpha/biosynthesis MH - Cycloheximide/pharmacology MH - Dose-Response Relationship, Drug MH - Endothelium, Vascular/drug effects/*metabolism MH - Epidermal Growth Factor/pharmacology MH - Epoprostenol/*biosynthesis MH - Humans MH - Indomethacin/pharmacology MH - Kinetics MH - Transforming Growth Factors/*pharmacology MH - Umbilical Veins EDAT- 1989/05/15 00:00 MHDA- 1989/05/15 00:01 CRDT- 1989/05/15 00:00 PHST- 1989/05/15 00:00 [pubmed] PHST- 1989/05/15 00:01 [medline] PHST- 1989/05/15 00:00 [entrez] AID - S0006-291X(89)80116-0 [pii] AID - 10.1016/s0006-291x(89)80116-0 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 1989 May 15;160(3):1100-5. doi: 10.1016/s0006-291x(89)80116-0.