Analysis of defensin expression by human primary airway epithelial cells exposed to A. fumigatus conidia or hyphal fragments To provide evidence selleck inhibitor for the biological significance of the discovered phenomenon, we verified whether or not

inducible defensin expression was Selleck Idasanutlin observed in the human primary airway epithelial cells, in addition to the detected defensin expression in airway cell lines A549 and 16HBE (described above). Airway epithelial cells obtained from human nasal turbinates (HNT) of patients undergoing turbinectomy were exposed to RC, SC or HF or latex beads for 18 hours. Examination of hBD2 or hBD9 expression showed that both defensins were detected by RT-PCR in the primary culture cells exposed to all of the morphotypes of A. fumigatus (Figure 5). The relative level of hBD2 and hBD9 expression in HNT cells was quantified by real time PCR. The expression of both defensins was higher in Il-1β stimulated cells than in the control, as shown in Figure 6. Exposure of HNT cells to SC resulted in a statistically significant increase of hBD2 and hBD9 expression compared BAY 63-2521 nmr to that of the untreated control cells or the cells exposed to the latex beads. The increase of defensin expression was also found in the cells exposed to RC and HF. However,

this difference was significant only for hBD2 in the cells exposed to RC. The difference in expression of hBD9 by the cells exposed to RC and in the expression of hBD2 as well as hBD9 by the cells exposed to HF did not reach a significant level. There was no difference between defensin expression in the untreated control cells and

the cells exposed to the latex beads. Figure 5 RT-PCR analysis of defensin mRNA expression by primary epithelial cells. Primary epithelial cells were obtained from human nasal turbinates Dichloromethane dehalogenase (HNT), as described in Methods. The cells (5 × 106) were grown in the six well plates for 48 hours. The cells were then exposed to either the latex beads or A. fumigatus organisms for 18 hours. The mRNA was then isolated by TRIzol Reagent and RT-PCR was performed as described above in Materials and Methods. Specific primer pairs (Table 1) were used for RNA amplification. The sizes of amplified products are indicated and were as predicted. The hBD2 and hBD9 products were sequenced and confirmed to be identical to the predicted sequence. GAPDH was uniformly expressed. Cells in a control well were cultivated in the absence of A. fumigatus. One of the three results is shown. Figure 6 Analysis of mRNA levels for HBD2 and HBD9 in HNT primary culture cells exposed to A. fumigatus organisms. Primary epithelial HNT cells (5 × 106) were grown in six well plates for 48 hours. The cells were then exposed to the different morphotypes of A. fumigatus or latex beads for 18 h. Cells were cultivated in a control well in the absence of A. fumigatus or the latex beads. Isolation of total RNA and synthesis of cDNA was performed as described in Methods.