Colon Cancer-Specific Antigen-2 May Be Used as a Detecting and Prognostic Marker in Colorectal Cancer: A Preliminary Observation |
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Authors: | Gang Xue Xiaojuan Wang Yong Yang Degui Liu Ying Cheng Jun Zhou Yongkuan Cao |
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Institution: | 1. Department of Breast and Thyroid Surgery, Chengdu Military General Hospital, Chengdu, P.R. China.; 2. Department of Endocrinology, Chengdu Military General Hospital, Chengdu, P.R. China.; 3. Department of General Surgery, Chengdu Military General Hospital, Chengdu, P.R. China.; Vanderbilt University Medical Center, United States of America, |
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Abstract: | BackgroundA specific and sensitive serum marker for colorectal cancer (CRC) detection and surveillance is central to effective treatment. It was preliminarily reported that some nuclear matrix proteins may be served as a specific blood based marker for colon cancer. The objective of this study is to evaluate the value of serum CCSA-2 detection in diagnosis, prognostic estimation and surveillance for CRC.MethodSerum CCSA-2 protein was measured in 181 various patient populations and 20 healthy donors before surgery. For 106 CRC patients, it was also measured on day 7 after surgery. Among them, 49 CRC patients'' CCSA-2 protein were measured during the follow-up period according to NCCN Guideline.ResultsThe serum CCSA-2 concentration in CRC patients was significantly higher than which in other patients and healthy individuals. Serum CCSA-2, at the cut-off point of 64.10 ng/mL, had a sensitivity of 98.10% and a specificity of 97.90% in separating CRC populations from all other individuals. The CCSA-2 assay was significantly more sensitive than CEA and CA19-9 assay in CRC detection. After surgery, the serum CCSA-2 level of CRC patients declined significantly, but it rebounded to a high level when recurrences occurred. The pre-operative serum CCSA-2 level in patients who had a relapse within the follow-up period was significantly higher than which in patients without relapse.ConclusionsSerum CCSA-2 not only may be a potential biomarker using in screening and surveillance of CRC, but also may be an independent prognostic marker for CRC patients. Further clinical trials need to be performed in a larger population of patients to ulteriorly confirm these results. |
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