We previously reported that PSK-induced lymphocyte blastogenesis reaction (PSK-stimulation index; PSK-SI) may be a prognostic marker for immunochemotherapy using PSK in gastrointestinal cancer patients. In this study we evaluated the usefulness of PSK-SI as a prognostic marker for PSK therapy at higher and lower serum immunosuppressive acidic protein (IAP) levels. 98 gastric and 135 colorectal cancer patients were analyzed. PSK-SI and serum IAP levels were measured preoperatively. After operation, patients received UFT and PSK for two years. There were no differences between patients with higher and those with lower PSK-SI with respect to the clinicopathological factors. In patients with higher serum IAP levels (> or = 500 microg/ml), recurrence-free survival (RFS) and overall survival (OS) were apparently more favorable in the higher PSK-SI group (gastric cancer; > or = 1.75, colorectal cancer; > or = 2.1) than in lower PSK-SI group, although the differences were not significant. Serum IAP levels and PSK-SI may be useful markers for prediction of response to immunochemotherapy using PSK, although further studies are necessary.
|Number of pages||10|
|Journal||Fukuoka igaku zasshi = Hukuoka acta medica|
|Publication status||Published - Dec 2013|
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