FIG. 3.

[³H]thymidine uptake by SMC in response to conditioned medium from HUVEC cultures infected with C. pneumoniae for 24 and 48 h. HUVEC cultures were either uninfected, mock infected, or infected with C. pneumoniae at an MOI of 0.1 (striped bars) or 1 (solid bars). Conditioned medium from these cultures was harvested at either 24 or 48 h and applied to SMC cultures for 24 h as described in the legend for Fig. 2. Data are the means ± standard errors of triplicate determinations of one representative experiment. ∗∗, P < 0.01, compared to uninfected controls.