Please use this identifier to cite or link to this item: https://doi.org/10.1021/pr901085z
Title: Proteomics of hepatocellular carcinoma: Serum vimentin as a surrogate marker for small tumors (≤2 cm)
Authors: Sun, S.
Poon, R.T.P.
Lee, N.P.
Yeung, C.
Chan, K.L.
Ng, I.O.L.
Day, P.J.R.
Luk, J.M. 
Keywords: AFP
Biomarker
Cancer screening
HCC
Tumor detection
Tumor size
Issue Date: 5-Apr-2010
Citation: Sun, S., Poon, R.T.P., Lee, N.P., Yeung, C., Chan, K.L., Ng, I.O.L., Day, P.J.R., Luk, J.M. (2010-04-05). Proteomics of hepatocellular carcinoma: Serum vimentin as a surrogate marker for small tumors (≤2 cm). Journal of Proteome Research 9 (4) : 1923-1930. ScholarBank@NUS Repository. https://doi.org/10.1021/pr901085z
Abstract: Small hepatocellular carcinomas (HCCs) can be effectively cured by surgery with good clinical outcomes. However, the conventional AFP marker is ineffective in detecting small tumors. Here we employed a proteomic profiling approach to identify a candidate marker for HCC (≤2 cm) in tumor tissues and then evaluate its clinical feasibility in patients? sera. The study was divided into 2 phases. (i) Biomarker discovery: we collected 76 frozen liver tissues (40 HCC and 36 controls) for proteomics profiling. Candidate protein markers were identified by MALDI-TOF/TOF and confirmed by immunoblot and qPCR. (ii) Clinical evaluation: Selected biomarker was tested by ELISA for sensitivity and specificity using serum samples from a separate cohort of 152 subjects (88 HCC and 64 controls). Vimentin was found significantly overexpressed in HCC, in particular the small-size subgroup (≤2 cm) with p < 0.01. When tested in the serum samples, vimentin level was significantly higher in small tumors than the non-neoplastic controls (AUC = 0.69 and p < 0.01). Further analysis suggested that elevated circulating vimentin level could detect small HCC at 40.91% sensitivity and 87.50% specificity. Moreover, vimentin was found to be superior to serum AFP assayed at different cut-offs in detecting small tumors. When combined with AFP, the detection sensitivity and specificity could be further enhanced to 58.77 and 98.15%, respectively. In conclusion, serum vimentin is a potential surrogate marker, either alone or in combination with AFP, for detection of small HCCs. © 2010 American Chemical Society.
Source Title: Journal of Proteome Research
URI: http://scholarbank.nus.edu.sg/handle/10635/125652
ISSN: 15353893
DOI: 10.1021/pr901085z
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