PMID- 1331934 OWN - NLM STAT- MEDLINE DCOM- 19921208 LR - 20211203 IS - 0950-9232 (Print) IS - 0950-9232 (Linking) VI - 7 IP - 11 DP - 1992 Nov TI - Met and hepatocyte growth factor/scatter factor signal transduction in normal melanocytes and melanoma cells. PG - 2195-206 AB - The proto-oncogene c-MET encodes a transmembrane tyrosine kinase receptor for hepatocyte growth factor/scatter factor (HGF/SF). HGF/SF stimulates the proliferation and motility of various cell types. Because HGF/SF is also a melanocyte mitogen, we investigated the biological role of HGF/SF, including c-Met expression, activation and signal transduction, in normal and malignant human melanocytes. We show that HGF/SF is mitogenic in the presence of synergistic factors, such as basic fibroblast growth factor (bFGF) and mast cell growth factor (MGF) and that, by itself, it stimulates the motility of normal human melanocytes. The ligand also maintained high levels of tyrosinase activity and melanin content in theses cells. Signal transduction by HGF/SF included phosphorylation of tyrosyl residues on c-Met, a cascade of tyrosine phosphorylations on several other proteins and activation of microtubule-associated protein kinase/extracellular signal-regulated kinase. Met expression and activity are normal in human melanomas, and constitutive activity of HGF/SF in retrovirally infected autonomously proliferative mouse melanocytes is insufficient to confer the malignant phenotype. Our findings suggest that activation of Met in response to HGF/SF may contribute to malignant progression synergistically with the aberrant expression of bFGF in malignant melanocytes and that, in addition, the peptide may promote dispersion of factor-dependent melanocytes from early stages of primary melanomas to ectopic sites. FAU - Halaban, R AU - Halaban R AD - Department of Dermatology, Yale University School of Medicine, New Haven, Connecticut 06510. FAU - Rubin, J S AU - Rubin JS FAU - Funasaka, Y AU - Funasaka Y FAU - Cobb, M AU - Cobb M FAU - Boulton, T AU - Boulton T FAU - Faletto, D AU - Faletto D FAU - Rosen, E AU - Rosen E FAU - Chan, A AU - Chan A FAU - Yoko, K AU - Yoko K FAU - White, W AU - White W AU - et al. LA - eng GR - 1RO1-AR39848/AR/NIAMS NIH HHS/United States GR - 5-R29-CA44542/CA/NCI NIH HHS/United States GR - DK 34128/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (MAS1 protein, human) RN - 0 (Proto-Oncogene Mas) RN - 0 (Proto-Oncogene Proteins) RN - 42HK56048U (Tyrosine) RN - 63X7MBT2LQ (Bucladesine) RN - 67256-21-7 (Hepatocyte Growth Factor) RN - 9007-49-2 (DNA) RN - EC 2.7.- (Protein Kinases) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-met) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinases) SB - IM MH - Animals MH - Bucladesine/pharmacology MH - Calcium-Calmodulin-Dependent Protein Kinases MH - Cells, Cultured MH - DNA/analysis MH - Hepatocyte Growth Factor/genetics/*pharmacology MH - Humans MH - Melanocytes/*drug effects/metabolism MH - Melanoma/metabolism/*pathology MH - Mice MH - Phosphorylation MH - Protein Kinases/analysis MH - Proto-Oncogene Mas MH - Proto-Oncogene Proteins/metabolism/*pharmacology MH - Proto-Oncogene Proteins c-met MH - Signal Transduction/*drug effects MH - Tyrosine/metabolism 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] PST - ppublish SO - Oncogene. 1992 Nov;7(11):2195-206.