Fig. 2.

RANKL and TRAIL expression by T cells. (A) (Upper) Resting CD4⁺ T cells do not express RANKL. (Lower) CD4⁺ T cells from the XHIM patient up-regulate RANKL expression with an intensity similar to that of a normal control 24 h after anti-CD3ϵ stimulation. The result of one experiment representative of three is shown. (B) TRAIL expression was minimally detected at 24 h after stimulation (thin line). The staining by an isotype-matched control antibody (thick line) is overlaid for each condition.