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. 1997 Nov 3;186(9):1407–1418. doi: 10.1084/jem.186.9.1407

Table 3.

Cytokine Secretion by CD8+ T Cell Subsets

Cells* IL-2 IFN-γ TNF-α IL-4
U/ml pg/ml pg/ml pg/ml
CD45RA+CD27+ 100  2,860    370 <1
CD45RA+CD27− <10  9,310 2,220 <1
CD45RA−CD27+ 100 11,940 1,660  10
*

 Sorted cells (2.5 × 104) were stimulated with PMA (100 ng/ml) and ionomycin (1 μM) for 4 d. Cytokine content of the supernatants was tested with a bioassay for IL-2 and ELISAs for IFN-γ, TNF-α, and IL-4.