PMID- 20370683 OWN - NLM STAT- MEDLINE DCOM- 20100816 LR - 20191027 IS - 1873-5576 (Electronic) IS - 1568-0096 (Linking) VI - 10 IP - 3 DP - 2010 May TI - Inhibition of c-Met with the specific small molecule tyrosine kinase inhibitor SU11274 decreases growth and metastasis formation of experimental human melanoma. PG - 332-42 AB - The hepatocyte growth factor/scatter factor (HGF/SF) tyrosine kinase (TK) receptor c-Met plays a crucial role in the development of the invasive phenotype of tumors and thus represents an attractive candidate for targeted therapies in a variety of malignancies, including human malignant melanoma (MM). In contrast to what has been shown previously, we were not able to detect any genetic alterations, either in the juxtamembrane- or in the TK-domain of c-Met, in the studied MM cell lines. Nevertheless, c-Met was constitutively active in these cell lines without exogenous HGF/SF stimulation. The active receptor was localized to the adhesion sites of the cells. Addition of the c-Met TK inhibitor SU11274 specifically decreased the phosphotyrosine signal at the focal adhesions sites, which was accompanied by a decrease in cell proliferation as well as an increase in apoptotic cells. In addition, non-apoptotic concentrations of SU11274 significantly reduced the in vitro migratory capacity of MM cells in the modified Boyden-chamber assay. Administration of SU11274 significantly decreased primary tumor growth as well as the capacity for liver colony formation of MM cells in SCID mice. Our study provides the first evidence for an in vivo antitumor activity of SU11274 in a human melanoma xenograft model, and suggests c-Met as a valid target for the therapy of MM. Consequently, SU11274 treatment might represent a useful strategy for controlling melanoma progression and metastasis in patients with MM. FAU - Kenessey, Istvan AU - Kenessey I AD - 2nd Institute of Pathology, Semmelweis University, Budapest, Hungary. FAU - Keszthelyi, Magdolna AU - Keszthelyi M FAU - Kramer, Z AU - Kramer Z FAU - Berta, Judit AU - Berta J FAU - Adam, Attila AU - Adam A FAU - Dobos, Judit AU - Dobos J FAU - Mildner, Michael AU - Mildner M FAU - Flachner, Beata AU - Flachner B FAU - Cseh, Sandor AU - Cseh S FAU - Barna, Gabor AU - Barna G FAU - Szokol, Balint AU - Szokol B FAU - Orfi, Laszl AU - Orfi L FAU - Keri, Gyorgy AU - Keri G FAU - Dome, Balazs AU - Dome B FAU - Klepetko, Walter AU - Klepetko W FAU - Timar, J AU - Timar J FAU - Tovari, J AU - Tovari J LA - eng PT - Journal Article PL - Netherlands TA - Curr Cancer Drug Targets JT - Current cancer drug targets JID - 101094211 RN - 0 (((3Z)-N-(3-chlorophenyl)-3-((3,5-dimethyl-4-((4-methylpiperazin-1-yl)carbonyl)-1H-pyrrol-2-yl)methylene)-N-methyl-2-oxo-2,3-dihydro-1H-indole-5-sulfonamide)) RN - 0 (Antineoplastic Agents) RN - 0 (Enzyme Inhibitors) RN - 0 (Indoles) RN - 0 (Piperazines) RN - 0 (Sulfonamides) RN - 42HK56048U (Tyrosine) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-met) SB - IM MH - Animals MH - Antineoplastic Agents/*pharmacology MH - Apoptosis/drug effects MH - Cell Line, Tumor MH - Cell Movement/drug effects MH - Cell Proliferation/*drug effects MH - Dose-Response Relationship, Drug MH - Enzyme Inhibitors/*pharmacology MH - Focal Adhesions/drug effects/enzymology MH - Humans MH - Indoles/*pharmacology MH - Liver Neoplasms/*drug therapy/enzymology/secondary MH - Melanoma/*drug therapy/enzymology/pathology MH - Mice MH - Mice, SCID MH - Phosphorylation MH - Piperazines/*pharmacology MH - Proto-Oncogene Proteins c-met/*antagonists & inhibitors/metabolism MH - RNA Interference MH - Sulfonamides/*pharmacology MH - Time Factors MH - Transfection MH - Tyrosine MH - Xenograft Model Antitumor Assays EDAT- 2010/04/08 06:00 MHDA- 2010/08/17 06:00 CRDT- 2010/04/08 06:00 PHST- 2009/05/12 00:00 [received] PHST- 2010/03/27 00:00 [accepted] PHST- 2010/04/08 06:00 [entrez] PHST- 2010/04/08 06:00 [pubmed] PHST- 2010/08/17 06:00 [medline] AID - EPub-Abstract-CCDT-31 [pii] AID - 10.2174/156800910791190184 [doi] PST - ppublish SO - Curr Cancer Drug Targets. 2010 May;10(3):332-42. doi: 10.2174/156800910791190184.