Results showing the uptake of thymidine by actively growing cells in respective experiments of primary and secondary stimulation.

<p>Splenocytes were incubated with different concentrations of synthetic AHLs (OdDHL and BHL) at 37°C for 48 h in the presence of 5% CO₂ and were counted on the basis of expression of incorporated thymidine. For secondary stimulation, cells were exposed to mitogen ConA (1 µg), followed by a subsequent exposure to different concentrations of synthetic AHLs. Unstimulated and DMSO treated cells were used as controls. Results are expressed as mean values ± SD of counts per minute for proliferating cells in the cell culture. The asterisk indicates the level of significance.