Figure 3. CC chemokines (CCL) expression by A. actinomycetemcomitans-induced T lymphocytes. CCL mRNA expression in T lymphocytes activated by dendritic cells primed at a MOI=102 with the A. actinomycetemcomitans strains ATCC® 43717™ (serotype a), ATCC® 43718™ (serotype b), and ATCC® 43719™ (serotype c). For relative expression, the CCL mRNA expression in T lymphocytes exposed to non-induced dendritic cells was considered as 1, as a reference for fold-change in expression (n.i). Data are represented as fold-change for 8 independent experiments. Each experiment was performed in duplicate. Comparisons were done between the different A. actinomycetemcomitans serotypes (*p<0.05).