Figure 3From: Inducible expression of beta defensins by human respiratory epithelial cells exposed to Aspergillus fumigatusorganismsKinetics of defensin mRNA expression by 16HBE human epithelial bronchial cells exposed to A. fumigatus organisms. 16HBE human epithelial tracheal cells (5 × 106) were grown in six well plates for 24 hours. The cells were then exposed to the different morphotypes of A. fumigatus or latex beads for the different periods: 4 h, 8 h and 18 h. After incubation, the cells were washed with PBS, mRNA was isolated by TRIzol Reagent, and RT-PCR was performed as described above in Materials and Methods. Specific primer pairs and the conditions of RT-PCR are described in Table 1. The sizes of amplified products are indicated and were as predicted: hBD2, 199-bp product; hBD9, 174 bp product and human GAPDH, 473-bp product. The hBD2 and hBD9 products were sequenced and confirmed to be identical to the predicted sequence. Cells were cultivated in a control well in the absence of A. fumigatus. GAPDH was uniformly expressed. One of the four results is shown.Back to article page