title: Downregulation of two isoforms of ubiquitin carboxyl-terminal hydrolase isozyme L1 correlates with high metastatic potentials of human SN12C renal cell carcinoma cell clones.
abstract: Proteomic differential display analysis was performed on human renal cell carcinoma cell SN12C clones having different metastatic potentials by using 2-DE and LC-MS/MS. The SN12C cell clones were SN12C parent cell line, SN12C-clone 2, SN12C-clone 4, and SN12C-PM6. The SN12C parent cell line was established from an HRCC surgical specimen. SN12C-clone 4 has lower, and SN12C-clone 2 and SN12C-PM6 have higher metastatic potential than SN12C parent cells. We found eight protein spots whose expression level was different between low metastatic clones and high metastatic clones. The protein expression of three appeared to be higher in high metastatic clones than low metastatic clones, and that of other five protein spots appeared to be lower in high metastatic clones than low metastatic clones. These spots were selected, digested and analyzed by LC-MS/MS analysis, and they were identified by peptide sequencing tag. In high metastatic potential clones, two isoforms of ubiquitin carboxyl-terminal hydrolase isozyme L1 (UCH-L1) were downregulated. These results suggest that UCH-L1 expression seems to be associated with the metastatic potential of HRCC SN12C cell clones.
authors.affiliation: Department of Digestive Surgery and Surgical Oncology Department of Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Kuramitsu
authors.forename: Masanori
authors.initials: M
authors.lastname: Fujimoto
authors.forename: Seiji
authors.initials: S
authors.lastname: Naito
authors.forename: Masaaki
authors.initials: M
authors.lastname: Oka
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Nakamura
mesh_terms: D014408:Biomarkers, Tumor / Q000096:biosynthesis*; D002292:Carcinoma, Renal Cell / Q000201:enzymology* / Q000473:pathology; D045744:Cell Line, Tumor; D002851:Chromatography, High Pressure Liquid; D002999:Clone Cells; D015536:Down-Regulation; D015180:Electrophoresis, Gel, Two-Dimensional; D006801:Humans; D007680:Kidney Neoplasms / Q000201:enzymology* / Q000473:pathology; D013058:Mass Spectrometry; D009361:Neoplasm Invasiveness; D009362:Neoplasm Metastasis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D043222:Ubiquitin Thiolesterase / Q000096:biosynthesis*
chemical_list: D014408:Biomarkers, Tumor; C482860:UCHL1 protein, human; D043222:Ubiquitin Thiolesterase