Abstract
T helper type 1 cell (Th1)/Th2 imbalance has been observed in a variety of pathological conditions, including malignant diseases. We evaluated the Th1/Th2 in peripheral blood Th cells by means of intracytoplasmic cytokine analysis in 11 dogs with advanced malignant tumor; four of them showed metastatic tumor. The percentage of Th1 was significantly lower and the percentage of Th2 was significantly higher in diseased dogs compared to healthy dogs. The percentage of Th1 in three patients with metastatic tumor was significantly lower than that in the patients with non-metastatic tumor. We conclude that the Th1/Th2 balance was polarized to Th2 in dogs with cancer.
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