Abstract
Background Elevated serum concentrations of macrophage-colony stimulating factor (M-CSF) have been found in a variety of malignant diseases. The aim of our study was to assess correlations between serum levels of M-CSF and clinicopathological features and survival rates in patients with colorectal cancer (CRC). Patients/methods M-CSF and the established tumor markers (carcinoembryonic antigen — CEA and carbohydrate antigen — CA 19-9) were investigated in the sera of 116 colorectal cancer patients and correlated with the clinical parameters of the disease and with the survival of patients. We compared M-CSF serum levels in CRC with colorectal adenoma patients. M-CSF was determined using enzyme-linked immunosorbent assay (ELISA). Tumor markers were measured by microparticle enzyme immunoassays (MEIA). Results CRC patients had significantly higher M-CSF and tumor markers levels compared to healthy controls and colorectal adenoma patients, with a significant association between M-CSF levels, disease stage and lymph node metastasis. Serum levels of M-CSF and CEA decreased significantly after radical resection of the tumor. Moreover, the multivariate analysis showed that the serum level of M-CSF in CRC patients was an independent prognostic factor. Conclusion These findings suggest the potential clinical use of circulating M-CSF measurements, particularly in estimating prognosis for patients with CRC.
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