Abstract | OBJECTIVE: METHODS: More than 100,000 glycan structures of serum glycoproteins obtained from 134 pretreatment all stage EOC patients (including 45 OCCCs) and 159 non- cancer control women (including 36 endometriomas) were explored for a mass spectrum approach. Diagnostic accuracy of identified biomarker was compared to the one of CA-125 by comparing area under curve (AUC) and positive/negative predictive values (PPV and NPV). RESULTS: A2160, a fully-sialylated alpha-chain of complement 4-binding protein, was identified as a candidate target marker. A2160 was significantly elevated in all stages of OCCC compared to with endometriomas. Diagnostic accuracy of A2160 (cutoff 1.6U/mL) to distinguish early stage OCCC from endometrioma is significantly higher than that of CA-125 (cutoff 35IU/L): AUC for A2160 versus CA-125, 0.92 versus 0.67; PPV 95% versus 64%; and NPV 85% versus 58%. In addition, fully-sialylated glycans had a higher accuracy for diagnosing EOC as compared to partially-sialylated glycans of alpha-chain of complement 4-binding protein. CONCLUSION: Our study suggested that A2160 may be a useful biomarker to distinguish early-stage OCCC from endometrioma. This new biomarker can be potentially applied for the monitoring of endometrioma patients, making possible the early diagnosis of OCCC.
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Authors | Mikio Mikami, Kazuhiro Tanabe, Koji Matsuo, Yuko Miyazaki, Masaki Miyazawa, Masaru Hayashi, Satoshi Asai, Masae Ikeda, Masako Shida, Takeshi Hirasawa, Nozomi Kojima, Ryuichiro Sho, Sadayo Iijima |
Journal | Gynecologic oncology
(Gynecol Oncol)
Vol. 139
Issue 3
Pg. 520-8
(Dec 2015)
ISSN: 1095-6859 [Electronic] United States |
PMID | 26477941
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved. |
Chemical References |
- Biomarkers, Tumor
- C4BPA protein, human
- CA-125 Antigen
- Complement C4b-Binding Protein
- Glycopeptides
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Topics |
- Adenocarcinoma, Clear Cell
(blood, pathology)
- Adult
- Aged
- Area Under Curve
- Biomarkers, Tumor
(chemistry, metabolism)
- CA-125 Antigen
(blood)
- Case-Control Studies
- Chromatography, Liquid
- Complement C4b-Binding Protein
(chemistry, metabolism)
- Endometriosis
(blood)
- Female
- Glycopeptides
(blood)
- Humans
- Mass Spectrometry
- Middle Aged
- Neoplasm Staging
- Ovarian Neoplasms
(blood, pathology)
- Predictive Value of Tests
- ROC Curve
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