An increasing trend was noted also in the number of CD4 + T cells stained for TIM3 or LAG3 in tumor of SR59230A, αPD-L1 treatments and their combination, but they failed to reach statistical significance.
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β3-adrenergic receptor on tumor-infiltrating lymphocytes sustains IFN-γ-dependent PD-L1 expression and impairs anti-tumor immunity in neuroblastoma.
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Moreover, a Ki67 staining assay showed a trend indicating an increased proliferation of CD8 + T cells in NB tumors of mice treated with the β3-AR antagonist or PD-L1 antibody, even if it failed to reach significant differences (Fig. 4C ).