Fig. 1.

CD14⁺ monocytes cultured with IL-15 acquired the characteristic morphology of mature dendritic cells. (a) CD14⁺ monocytes cultured for 6 d with GM-CSF and IL-4, followed by TNF-α stimulation for 1 d; (b) CD14⁺ monocytes cultured for 7 d with IL-15 alone. Magnification 40 ×.