title: [Evaluation of serum pepsinogen I , II and osteopontin co-detection in gastric cancer screening].
abstract: OBJECTIVE
  To explore the value of combined assay of serum PG and OPN concentration for gastric cancer screening.
  
  
  METHODS
  Pepsinogen I , II and osteopontin (OPN) concentrations in fasting serum were measured by ELISA in 570 subjects, including 144 gastric cancer, 60 dysplasia, 113 atrophic gastritis, 70 erosion or ulcer, 92 superficial gastritis and 91 healthy control. The cut off point for PG and OPN was determined using receiver operator characteristics curves (ROC).
  
  
  RESULTS
  Using a serum PG I concentration < or =80 ng/ml, I: II ration < or =5.0 and OPN concentration > or =34 ng/ml or > or =30.4 ng/ml (based on ROC) for gastric cancer screening,the specificity, positive and negative predictive values were superior to that obtained by PG concentration only. Using a serumPGI concentration < or =50 ng/ml, I : II ration C 5. 0 and OPN concentration > or =35.2 ng/ml or > or =29. 2 ng/ml (based on ROC), the sensitivity, positive and negative predictive values were superior to that obtained by PG concentration only. Combining PG and OPN for gastric cancer screening, both sensitivity and specificity were more than 70% , while with OPN alone, only good specificity can be achieved.
  
  
  CONCLUSIONS
  Combining different serum PG and OPN concentration for gastric cancer screening is superior to PG or OPN only. This may be used as a new method in gastric cancer mass screening.
authors.affiliation: Cancer Institute of The First Affiliated Hospital, China Medical University, Shenyang 110001, China.
authors.forename: Yue-hua
authors.initials: YH
authors.lastname: Gong
authors.forename: Li-ping
authors.initials: LP
authors.lastname: Sun
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yuan
mesh_terms: D005757:Gastritis, Atrophic / Q000097:blood / Q000175:diagnosis; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D053495:Osteopontin / Q000097:blood*; D020116:Pepsinogen A / Q000097:blood*; D020115:Pepsinogen C / Q000097:blood*; D011230:Precancerous Conditions / Q000097:blood / Q000175:diagnosis; D012372:ROC Curve; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013274:Stomach Neoplasms / Q000097:blood / Q000175:diagnosis*; D013276:Stomach Ulcer / Q000097:blood / Q000175:diagnosis
chemical_list: D053495:Osteopontin; D020115:Pepsinogen C; D020116:Pepsinogen A