Rodríguez-Piñeiro AM, García-Lorenzo A, Blanco-Prieto S, Alvarez-Chaver P, Rodríguez-Berrocal FJ, Cadena MPDL, Martínez-Zorzano VS. Secreted clusterin in colon tumor cell models and its potential as diagnostic marker for colorectal cancer.
Cancer Invest 2012;
30:72-8. [PMID:
22236192 DOI:
10.3109/07357907.2011.630051]
[Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We studied the specific changes of the secreted protein clusterin and its cytoplasmic precursor regarding colorectal tumorigenesis, using in vitro differentiation of Caco-2 cells. In tumor-like stage, we observed an overexpression of both precursor and secreted clusterin, corroborated in the cell line SW-480. Noticeably, SW-620 cells (from a tumoral node, thus with metastatic capacity) did not show overexpression of either precursor or secreted clusterin, suggesting a downregulation related to local metastasis. We further investigated clusterin in serum, finding a significant increase in colorectal cancer patients, with 81% sensitivity, 79% specificity, and an area under the ROC curve of 0.85.
Collapse