Deep depletion of abundant serum proteins reveals low-abundant proteins as potential biomarkers for human ovarian cancer.
Deep depletion of abundant serum proteins reveals low-abundant proteins as potential biomarkers for human ovarian cancer.
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DOI：
10.1002/prca.200800141
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发表时间：
2009-07-01
影响因子：
2
通讯作者：
Odunsi, Kunle
中科院分区：
文献类型：
--
作者：
Lin, Biaoyang;White, James T.;Wu, Jian;Lele, Shashikant;Old, Lloyd J.;Hood, Leroy;Odunsi, Kunle
Epithelial ovarian cancer (EOC) ranks fifth as a cause of cancer deaths in women. Current diagnostic and monitoring markers have limited reliability for the detection of disease. We have tested the possibility of identifying candidate biomarkers present at low nanogram to picogram levels after removing both the 12 most abundant and 77 moderately abundant proteins from serum samples of EOC patients using antibody affinity columns. We showed that this approach allows the identification of proteins that are expressed at nanogram per liter levels in the serum. Using ICAT/MS/MS analysis, we identified 51 proteins that are differentially expressed by at least twofold. These proteins include leucine-rich α-2-glycoprotein, matrix metalloproteinase-9 (MMP-9), inter-α-trypsin inhibitor heavy chain H1, insulin-like growth factor-binding protein 6, insulin-like growth factor-binding protein 3, isoform 1 of epidermal growth factor receptor, angiopoietin-like protein 3 (ANGPTL3) and phosphatidylcholine-sterol acyltransferase. We confirmed the differential expression of MMP9 and ANGPTL3 in normal and ovarian cancer sera by ELISA assays. Further robust clinical evaluation of the candidate markers identified is necessary.
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