title: Identification of biomarkers for ovarian cancer using strong anion-exchange ProteinChips: potential use in diagnosis and prognosis.
abstract: One hundred eighty-four serum samples from patients with ovarian cancer (n = 109), patients with benign tumors (n = 19), and healthy donors (n = 56) were analyzed on strong anion-exchange surfaces using surface-enhanced laser desorption/ionization time-of-flight mass spectrometry technology. Univariate and multivariate statistical analyses applied to protein-profiling data obtained from 140 training serum samples identified three biomarker protein panels. The first panel of five candidate protein biomarkers, termed the screening biomarker panel, effectively diagnosed benign and malignant ovarian neoplasia [95.7% sensitivity, 82.6% specificity, 89.2% accuracy, and receiver operating characteristic (ROC) area under the curve of 0.94]. The other two panels, consisting of five and four candidate protein biomarkers each, effectively distinguished between benign and malignant ovarian neoplasia and were therefore referred to as validation biomarker panel I (81.5% sensitivity, 94.9% specificity, 88.2% accuracy, and ROC = 0.94) and validation biomarker panel II (72.8% sensitivity, 94.9% specificity, 83.9% accuracy, and ROC = 0.90). The three ovarian cancer biomarker protein panels correctly diagnosed 41 of the 44 blinded test samples: 21 of 22 malignant ovarian neoplasias [10 of 11 early-stage ovarian cancer (I/II) and 11 of 11 advanced-stage ovarian cancer (III/IV)], 6 of 6 low malignant potential, 5 of the 6 benign tumors, and 9 of 10 normal patient samples. In conclusion, we have discovered three ovarian cancer biomarker protein panels that, when used together, effectively distinguished serum samples from healthy controls and patients with either benign or malignant ovarian neoplasia.
authors.affiliation: Department of Obstetrics and Gynecology, UCLA School of Medicine, University of California-Los Angeles, 10833 LeConte Avenue, Los Angeles, CA 90095, USA.
authors.forename: Katherine R
authors.initials: KR
authors.lastname: Kozak
authors.forename: Malaika W
authors.initials: MW
authors.lastname: Amneus
authors.forename: Suzanne M
authors.initials: SM
authors.lastname: Pusey
authors.forename: Feng
authors.initials: F
authors.lastname: Su
authors.forename: Mui N
authors.initials: MN
authors.lastname: Luong
authors.forename: Sam A
authors.initials: SA
authors.lastname: Luong
authors.forename: Srinivasa T
authors.initials: ST
authors.lastname: Reddy
authors.forename: Robin
authors.initials: R
authors.lastname: Farias-Eisner
mesh_terms: D014408:Biomarkers, Tumor / Q000097:blood*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D009363:Neoplasm Proteins / Q000097:blood*; D010051:Ovarian Neoplasms / Q000097:blood* / Q000175:diagnosis; D011379:Prognosis; D040081:Protein Array Analysis / Q000379:methods / Q000706:statistics & numerical data; D012680:Sensitivity and Specificity
chemical_list: D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins