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Soluble B7-H3 secretion by CRC cell lines stimulated by inflammatory cytokines IFN-γ and TNF-α, respectively. Increased soluble B7-H3 was detected when the LS174T and CW-2 stimulated by TNF-α at 20 ng/ml for 72 h cultivation in contrast to the negative control (P < 0.05). B7-H3-L929 cell lines were used as positive control
