Figure 2. FHA induces a distinct response as compared to heat-killed B. pertussis and its purified LPS.
Data for the 1,235 FHA-responsive elements from our 23 arrays were compared to data for the 920 elements previously described by Boldrick et al. from 16 arrays [20], whose expression in PBMCs displayed a ≥2.5-fold change from baseline (t = 0) in response to BpLPS (1 µg/ml) or to two heat-killed B. pertussis strains (BP338 and Minnesota 1 [BpeMin1]). The 143 elements common to both data sets are represented in a hierarchical cluster format. Each time course is represented by a triangle at the top of the Figure; the times of exposure are 0.5, 2, 4, and 6 hrs for all conditions except for FHA-4, in which the 4 hour time point is missing. The genes represented by at least two non-identical elements on the arrays are indicated in bold.