Alveolar macrophages from 13 different lung transplant recipients were isolated from bronchoalveolar lavage. Cells were pre-treated for 1 h with FK506 (10 ng/ml), the NFAT inhibitor MCV1 (1 μM) or SC514 (10 μM) before stimulation with A. fumigatus swollen conidia (MOI 0.1). After 24 h of stimulation, TNF-α was measured in the cell culture supernatant by ELISA.B Inhibition of alveolar macrophage responses to AF with FK506, MCV1 or SC514 led to a significant reduction in TNF-α levels. 