However, in diseases such as ABPA, tolerance is lost or not established, and patients become sensitized to the inhaled fungal antigen Aspergillus fumigatus. We have previously shown that peripheral CD11c + DCs and TSLP-DCs from ABPA patients induce robust Th2 cytokine responses from autologous CD4+ T-cells in an OX40L-dependent manner [7]. Here, ITGAX is linked to allergic bronchopulmonary aspergillosis.