Figure 3
Pollen and PCGs-induced proliferation of lymph node cells. Cells from the NC and the 4 sensitized rats' groups were cultured with [3H]-thymidine in the presence of 100 μg of pollen and 9 × 106 PCGs. cpmpollen, thymidine incorporation by pollen-stimulated cells; cpmPCGs, thymidine incorporation by PCGs-stimulated cells; cpm0, thymidine in-corporation in control cells; NC, negative control group; PP, rats sensitized and challenged with 0.5 mg of pollen; GG, rats sensitized and challenged with 4.5 ×107 PCGs; PG, rats sensitized with 0.5 mg of pollen and challenged with 4.5 × 107 PCGs; GP, rats sensitized with 4.5 × 107 PCGs and challenged with 0.5 mg of pollen; *, significantly different from the NC group (P < 0.05); #, significantly different from the PP group (P < 0.05); +, significantly different from the GG group (P < 0.05).