Abstract
Increased levels of a soluble receptor for interleukin-2 (sIL-2R) have been found in the serum from patients with a variety of malignancies. Levels of sIL-2R have not previously been examined in a large group of patients with gastric cancer as a possible indicator of prognosis. Serum levels of sIL-2R were measured preoperatively by an enzyme-linked immunosorbent assay in 121 patients with gastric cancer. The preoperative levels of sIL-2R in patients with gastric cancer were significantly higher than those in normal controls. An elevated level of sIL-2R was significantly correlated with certain clinicopathologic features, which included depth of invasion, lymph node metastasis, lymphatic vessel invasion, blood vessel invasion and clinical stage. The postoperative survival time of patients with elevated levels of sIL-2R was significantly shorter than that of patients with normal levels. Furthermore, a multivariate analysis using Cox’s proportional hazards model showed that the combination of levels of carcinoembryonic antigen and sIL-2R was an independent indicator of prognosis. Thus, the serum level of sIL-2R might be a useful prognostic indicator in patients with gastric cancer.
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