Multicenter analysis of soluble Axl reveals diagnostic value for very early stage hepatocellular carcinoma

If diagnosed at early stages, patients with hepatocellular carcinoma (HCC) can receive curative therapies, whereas therapeutic options at later stages are very limited. Here, we addressed the potential of soluble Axl (sAxl) as a biomarker of early HCC by analyzing levels of sAxl in 311 HCC and 237 c...

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Hauptverfasser: Reichl, Patrick (VerfasserIn) , Dooley, Steven (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 15 July 2015
In: International journal of cancer
Year: 2015, Jahrgang: 137, Heft: 2, Pages: 385-394
ISSN:1097-0215
DOI:10.1002/ijc.29394
Online-Zugang:Verlag, teilw. kostenfrei, Volltext: http://dx.doi.org/10.1002/ijc.29394
Verlag, teilw. kostenfrei, Volltext: http://onlinelibrary.wiley.com.ezproxy.medma.uni-heidelberg.de/doi/10.1002/ijc.29394/abstract
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Verfasserangaben:Patrick Reichl, Meng Fang, Patrick Starlinger, Katharina Staufer, Rudolf Nenutil, Petr Muller, Kristina Greplova, Dalibor Valik, Steven Dooley, Christine Brostjan, Thomas Gruenberger, Jiayun Shen, Kwan Man, Michael Trauner, Jun Yu, Chun Fang Gao and Wolfgang Mikulits

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520 |a If diagnosed at early stages, patients with hepatocellular carcinoma (HCC) can receive curative therapies, whereas therapeutic options at later stages are very limited. Here, we addressed the potential of soluble Axl (sAxl) as a biomarker of early HCC by analyzing levels of sAxl in 311 HCC and 237 control serum samples from centers in Europe and China. Serum concentrations of sAxl were significantly increased in HCC (18.575 ng/mL) as compared to healthy (13.388 ng/mL) or cirrhotic (12.169 ng/mL) controls. Receiver operating characteristic curve analysis of sAxl in very early stage HCC patients (BCLC 0) showed an area under the curve (AUC) of 0.848, with a sensitivity of 76.9% and a specificity of 69.2%. α-Fetoprotein (AFP)-negative HCC patients displayed an AUC of 0.803, with sensitivity and specificity of 73% and 70.8%. Combination of sAxl and AFP improved diagnostic accuracy to 0.936 in very early HCC patients and to 0.937 in all HCC. Differential diagnosis of very early HCC versus liver cirrhosis showed a combined performance for sAxl and AFP of 0.901 with a sensitivity of 88.5% and a specificity of 76.7%. Furthermore, sAxl levels failed to be elevated in primary ovarian, colorectal and breast carcinomas as well as in secondary hepatic malignancies derived from colon. In summary, sAxl outperforms AFP in detecting very early HCC as compared to healthy or cirrhotic controls and shows high diagnostic accuracy for AFP-negative patients. sAxl is specific for HCC and suggested as a biomarker for routine clinical use. 
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