title: [Screening for the serum differential proteins of renal cell carcinoma using magnetic beads-based matrix-assisted laser desorption/ionization time-of-flight mass spectrometry].
abstract: OBJECTIVE
  To screen for the differential protein peaks of renal cell carcinoma (RCC) using magnetic beads-based matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS).
  
  
  METHODS
  Serum proteins were profiled by magnetic beads (WCX) from 62 RCC patients and 37 patients with benign renal space-occupying lesions. Protein peaks were identified by MALDI-TOF-MS. Data were analyzed with Biomarker Wizard 3.1 and Biomarker Patterns Software 5.0. Diagnostic model for RCC was constructed based on 47 RCC cases and 26 patients with benign renal space-occupying lesions. The remaining 26 cases were evaluated with blind method.
  
  
  RESULTS
  Seven differential protein peaks related to RCC were identified (Pβ0.05). The diagnostic model for RCC constructed by the differential protein peaks (m/z 2945.35, 15340.8, 6984.51, and 5819.23) generated excellent separation between the RCC and control groups, with a sensitivity of 83.0% and the specificity of 84.6%. As validated by blind method, the model had a sensitivity of 80.0% and a specificity of 81.8%.
  
  
  CONCLUSIONS
  Differential protein peaks for RCC can be identified in serum by magnetic beads-based MALDI-TOF-MS, which is also valuable for the establishment of a RCC diagnostic model with a high sensitivity and specificity.
authors: Department of Urology,PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors: Jin-Shun
authors: JS
authors: Liu
authors: Han-zhong
authors: HZ
authors: Li
authors: Yu-Shi
authors: YS
authors: Zhang
authors: Peng
authors: P
authors: Wang
authors: Wei-gang
authors: WG
authors: Yan
authors: Jing
authors: J
authors: Xie
authors: De-xin
authors: DX
authors: Dong
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000097:blood; D001798:Blood Proteins / Q000032:analysis*; D002292:Carcinoma, Renal Cell / Q000097:blood* / Q000175:diagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D040901:Proteomics / Q000379:methods; D012680:Sensitivity and Specificity; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*
chemical_list: D014408:Biomarkers, Tumor; D001798:Blood Proteins