Fig. 4.
Assessment of memory type CD8+ T cells in vaccinated mice.
After vaccination, the number of CD8+ T cells expressing activated–memory phenotype (CD44hi CD122+) were estimated by flow cytometry. On day 21, cells expressing these phenotypes increased in IL-10–treated mice (groups 3 and 4) (left), and the absolute number in spleen increased until day 28 (right). (On day 21, group 3 vs group 1, [P < .05]; group 3 vs group 2 [P < .01]; group 3 vs group 4 [P > .05]). The absolute number of such T cells in spleen was thus calculated as (percentage × spleen cell number). Mean values are shown for 3 mice evaluated at each time point.