C-E J774A.1 macrophages were pre-treated with (C, D) the Syk inhibitor piceatannol or (E) a control or Syk-targeting siRNA (10 nM) before stimulation with swollen conidia (MOI = 1) or zymosan (50 μg/ml). (C) TNF-α was measured in the SN after overnight incubation. Syk inhibition significantly reduced swollen conidia-dependent or zymosan-dependent TNF-α levels. 