The effects of activin-A on NK-cell cytokine and chemokine production. NK-cell supernatants generated from experiments shown in Figure 4 were screened with the use of (A) a multiplex cytokine and (B) a multiplex chemokine array system and levels measured on a Luminex instrument. The concentration range produced by individual donors is shown in nanograms per milliliter. Data represent the mean plus or minus 1 SD of 3 separate donors. *P < .01 versus no activin-A.