title: The significance of PSA/IGF-1 ratio in differentiating benign prostate hyperplasia from prostate cancer.
abstract: The importance of insulin-like growth factor 1 (IGF-1) in human serum for the early diagnosis of prostate cancer is controversial. The IGF-1/PSA ratio may improve the performance of prostate specific antigen (PSA) as a prostate cancer marker. IGF-1, along with PSA and free PSA concentration, was measured in the serum of 34 patients with prostate cancer and in 131 patients with benign prostatic hyperplasia (BPH). Although IGF-1 concentration did not significantly differ between the groups, PSA/IGF-1 ratio could clearly distinguish the two groups. In patients with cancer but not in patients with BPH, IGF-1 concentration correlated with PSA and free PSA. The values of PSA and free PSA correlated with each other for both groups. Receivers Operating Curve (ROC) analysis indicated a better sensitivity to specificity ratio for PSA/IGF-1 than for PSA or Free/Total (F/T) PSA.
authors.affiliation: Department of Biological Chemistry, Medical School, Aristotle University of Thessaloniki, Greece. koliakos@med.auth.gr
authors.forename: G
authors.initials: G
authors.lastname: Koliakos
authors.forename: D
authors.initials: D
authors.lastname: Chatzivasiliou
authors.forename: T
authors.initials: T
authors.lastname: Dimopoulos
authors.forename: V
authors.initials: V
authors.lastname: Trachana
authors.forename: K
authors.initials: K
authors.lastname: Paschalidou
authors.forename: V
authors.initials: V
authors.lastname: Galiamoutsas
authors.forename: A
authors.initials: A
authors.lastname: Triantos
authors.forename: G
authors.initials: G
authors.lastname: Chitas
authors.forename: A
authors.initials: A
authors.lastname: Dimopoulos
authors.forename: G
authors.initials: G
authors.lastname: Vlatsas
mesh_terms: D000230:Adenocarcinoma / Q000097:blood / Q000175:diagnosis*; D000368:Aged; D014408:Biomarkers, Tumor / Q000097:blood*; D003937:Diagnosis, Differential; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000097:blood*; D011237:Predictive Value of Tests; D011446:Prospective Studies; D017430:Prostate-Specific Antigen / Q000097:blood*; D011470:Prostatic Hyperplasia / Q000097:blood / Q000175:diagnosis*; D011471:Prostatic Neoplasms / Q000097:blood / Q000175:diagnosis*; D012372:ROC Curve; D012680:Sensitivity and Specificity
chemical_list: D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins; D007334:Insulin-Like Growth Factor I; D017430:Prostate-Specific Antigen