title: L-arginine-glycine amidinotransferase, betaine-homocysteine S-methyltransferase, and neuropolypeptide H3 are diminished in renal clear cell carcinoma of humans.
abstract: OBJECTIVE
  To identify renal clear cell carcinoma-associated marker proteins.
  
  
  METHODS
  Twelve patients with renal cell carcinoma (RCC) were collected and processed in the Department of Urology, Renmin Hospital, Wuhan University, China, between January 2008 and September 2009. Two-dimensional polyacrylamide gel electrophoresis and matrix assisted laser desorption ionisation time-of-flight mass spectrometry (MALDI-TOF-MS) were employed to investigate differentially expressed protein spots between RCC tissues and adjacent normal tissues, then reverse transcription polymerase chain reaction and western blot were employed to confirm the proteomic results.
  
  
  RESULTS
  One protein spot was upregulated, 13 were downregulated, and 22 were absent in RCC tissues. Four of the absent proteins were L-arginine-glycine amidinotransferase (AGAT), Betaine-homocysteine S-methyltransferase (BHMT), Ketohexokinase (KHK), and Neuropolypeptide h3 (NPh3). The reverse transcriptase-polymerase chain reaction analysis demonstrated mRNA expression of AGAT, BHMT, and Nph3 was significantly decreased in 12 RCC tissues. In addition, Western blot analysis showed AGAT protein was absent in 11/12, BHMT in 9/12, and Nph3 in 5/12 RCC tissues.
  
  
  CONCLUSIONS
  Absence of AGAT, BHMT, and Nph3 is common events in clear cell RCC; hence, it may be involved in the development of RCC; therefore, they have the potential to be tumor markers for diagnosis, treatment, and prognosis of RCC patients.
authors.affiliation: Department of Urology, Renmin Hospital of Wuhan University, Wuhan, China.
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Peng
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Hsuan-Wei
authors.initials: HW
authors.lastname: Huang
authors.forename: Feng-Hua
authors.initials: FH
authors.lastname: Wang
authors.forename: Xian-Jin
authors.initials: XJ
authors.lastname: Du
authors.forename: Peng-Cheng
authors.initials: PC
authors.lastname: Luo
mesh_terms: D000368:Aged; D000579:Amidinotransferases / Q000378:metabolism*; D050940:Betaine-Homocysteine S-Methyltransferase / Q000378:metabolism*; D014408:Biomarkers, Tumor / Q000378:metabolism*; D015153:Blotting, Western; D002292:Carcinoma, Renal Cell / Q000201:enzymology / Q000378:metabolism*; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000201:enzymology / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D049488:Phosphatidylethanolamine Binding Protein / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D014408:Biomarkers, Tumor; C511482:PEBP1 protein, human; D049488:Phosphatidylethanolamine Binding Protein; D050940:Betaine-Homocysteine S-Methyltransferase; D000579:Amidinotransferases; C020681:glycine amidinotransferase