borderline significantP = 0.05
In untreated cells, limited or no HIV gag-p24 protein was detected across all cell pellets (average 0.019 ± 0.009 pg/mL, assuming a value of 0.005 pg/mL for all samples with gag-p24 below the LOD), while anti-CD3/CD28 induced an average 0.138 ± 0.070 pg/mL of viral protein, or a borderline significant 7.6-fold increase over no-drug control ( P = 0.05; Fig. 4B ).