Celecoxib up-regulates the expression of the zeta chain of T cell receptor complex in tumor-infiltrating lymphocytes in human cervical cancer
Abstract
PURPOSE: We evaluated the effects of celecoxib treatment on tumor-infiltrating lymphocyte (TIL) subsets [CD3(+), CD4(+),CD8(+), CD25(+), and T cell receptor (TCR)-zeta-expressing cells] and tryptase-positive mast cells in cervical tumors. Circulating levels of cytokines [interleukin (IL)-1beta, IL-10, tumor necrosis factor-alpha, IL-6, and IL-12] and angiogenesis-modulating factors (vascular endothelial growth factor and endostatin) have also been analyzed.
EXPERIMENTAL DESIGN: Cervical tumor biopsies and blood samples were obtained at the time of diagnosis and after 10 days of celecoxib treatment (400 mg b.i.d., at 8:00 a.m. and 8:00 p.m.) in 27 cases. Immunohistochemistry and ELISA assays were used to assess the expression of biological factors in tumor tissue and circulating levels of cytokines and angiogenic molecules.
RESULTS: We showed a statistically significant increase in the percentage of TIL expressing the TCR-zeta chain after celecoxib treatment: indeed, in cases exposed to celecoxib, the percentage of TCR-zeta(+) cells ranged from 5.0 to 50.0 (median, 22.5) with respect to baseline expression (range, 3.0-50.0; median, 10.0; P = 0.0016). There was no significant treatment-related difference in the percentage of CD3(+), CD4(+), CD8(+), and CD25(+) TIL as well as in tryptase-positive cells. IL-12 levels were significantly reduced in posttreatment samples with respect to baseline levels (P = 0.002). We also found a reduction in the circulating levels of vascular…
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