title: 12-lipoxygenase expression in human melanoma cell lines.
abstract: 12-lipoxygenase (12-LOX) expression and function in the regulation of the metastatic phenotype was demonstrated in several murine melanoma lines before. Here we have provided novel evidences that, though at a low level (in max. 15% of the cell population), human melanoma lines (HT168, M1, HT199, HT18 and WM35) express the platelet-type isoform of 12-LOX both at mRNA and protein levels. 12-LOX expression was demonstrated in cultured tumor cells and in skin tumor xenografts. Comparison of the expression of 12-LOX in skin primary tumors and its lung metastases indicated a stable expression. The low level of 12-LOX expression in human melanoma cell lines suggests that other lipoxygenase(s) could also be responsible for the metabolism of arachidonic acid to 12-HETE breakdown products.
authors.affiliation: 1st Institute of Pathology and Experimental Cancer Research, Semmelweis University of Medicine, Budapest, Hungary.
authors.forename: J
authors.initials: J
authors.lastname: Timár
authors.forename: E
authors.initials: E
authors.lastname: Rásó
authors.forename: K V
authors.initials: KV
authors.lastname: Honn
authors.forename: W
authors.initials: W
authors.lastname: Hagmann
mesh_terms: D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid / Q000378:metabolism; D000818:Animals; D000831:Animals, Newborn; D001092:Arachidonate 12-Lipoxygenase / Q000235:genetics* / Q000378:metabolism*; D015870:Gene Expression; D006801:Humans; D008545:Melanoma / Q000201:enzymology* / Q000235:genetics*; D051379:Mice; D016513:Mice, SCID; D009368:Neoplasm Transplantation; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012334:RNA, Neoplasm / Q000235:genetics / Q000378:metabolism; D051381:Rats; D014183:Transplantation, Heterologous; D014407:Tumor Cells, Cultured
chemical_list: D012333:RNA, Messenger; D012334:RNA, Neoplasm; D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid; D001092:Arachidonate 12-Lipoxygenase