(a,d) N-NK and T-NK were analyzed for IFNγ or TNFα in the presence or absence of IL2 stimulation. (b,e) N-NK cells and (c,f) T-NK cells were pretreated with 10μM of PGE2, PGE1-OH, Butaprost (BUT), or Sulprostone (SUL). Cell culture supernatants were assayed for IFNγ or TNFα. Results are reported as mean pg/mL/1×106 cells ± standard error, n=3. Relative to DMSO, treatment *p<0.05.