Sandanayake, NS and Sinclair, J and Andreola, F and Chapman, MH and Xue, A and Webster, GJ and Clarkson, A and Gill, A and Norton, ID and Smith, RC and Timms, JF and Pereira, SP (2011) A combination of serum leucine-rich alpha-2-glycoprotein 1, CA 19-9 and interleukin-6 differentiate biliary tract cancer from benign biliary strictures. BRIT J CANCER , 105 (9) 1370 - 1378. 10.1038/bjc.2011.376.
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BACKGROUND: Biliary tract cancer (BTC) and benign biliary strictures can be difficult to differentiate using standard tumour markers such as serum carbohydrate antigen 19-9 (CA 19-9) as they lack diagnostic accuracy.METHODS: Two-dimensional difference gel electrophoresis and tandem mass spectrometry were used to profile immunodepleted serum samples collected from cases of BTC, primary sclerosing cholangitis (PSC), immunoglobulin G4-associated cholangitis and healthy volunteers. The serum levels of one candidate protein, leucine-rich alpha-2-glycoprotein (LRG1), were verified in individual samples using enzyme-linked immunosorbent assay and compared with serum levels of CA 19-9, bilirubin, interleukin-6 (IL-6) and other inflammatory markers.RESULTS: We report increased LRG1, CA 19-9 and IL-6 levels in serum from patients with BTC compared with benign disease and healthy controls. Immunohistochemical analysis also demonstrated increased staining of LRG1 in BTC compared with cholangiocytes in benign biliary disease. The combination of receiver operating characteristic (ROC) curves for LRG1, CA 19-9 and IL-6 demonstrated an area under the ROC curve of 0.98. In addition, raised LRG1 and CA 19-9 were found to be independent predictors of BTC in the presence of elevated bilirubin, C-reactive protein and alkaline phosphatase.CONCLUSION: These results suggest LRG1, CA 19-9 and IL-6 as useful markers for the diagnosis of BTC, particularly in high-risk patients with PSC. British Journal of Cancer (2011) 105, 1370-1378. doi:10.1038/bjc.2011.376 www.bjcancer.com Published online 4 October 2011 (C) 2011 Cancer Research UK
|Title:||A combination of serum leucine-rich alpha-2-glycoprotein 1, CA 19-9 and interleukin-6 differentiate biliary tract cancer from benign biliary strictures|
|Keywords:||biliary tract cancer, PSC, IAC, serum proteomic profiling, leucine-rich alpha-2-glycoprotein, interleukin-6, PRIMARY SCLEROSING CHOLANGITIS, CHOLANGIOCARCINOMA CELL-LINE, GEL-ELECTROPHORESIS, PROTEOMIC ANALYSIS, PANCREATIC-CANCER, EPITHELIAL-CELLS, GROWTH-FACTOR, UP-REGULATION, RISK-FACTORS, UTILITY|
|UCL classification:||UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute for Women's Health > Women's Cancer|
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