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NK cell co-culture reduces viability and proliferation of oxaliplatin-resistant colorectal cancer cell lines. Oxaliplatin-resistant (OR)-DLD1 and OR-RKO cells were subjected to (A) viability and (B) proliferation assays, in the absence (NK cell -) or presence (NK cell +) of co-cultured natural killer cells, respectively. Data are presented as mean ± SD from at least three independent experiments. **P<0.01, *P<0.05, NK cell - vs NK cell +.
