Journal: Cell Death & Disease
Article Title: PP2A-dependent control of transcriptionally active FOXO3a in CD8 + central memory lymphocyte survival requires p47 phox
doi: 10.1038/cddis.2012.118
Figure Lengend Snippet: Significantly fewer CD4 + and CD8 + lymphocytes accumulate in the infected spleens of p47 phox−/− mice during primary L. monocytogenes infection. WT ( ) and p47 phox−/− ( ) mice were infected with 5 × 10 4 CFU (0.1 LD 50 ) rLM-OVA. On the indicated post infection day the mice were euthanized and single-cell splenocyte cultures were incubated for 3–5 h with 1 μ M OVA 323-339 and/or OVA 257-264 peptides for CD4 and CD8 T lymphocyte stimulation, respectively. Monensin was added for the final 2 h of culture, and the cells were harvested and stained for surface CD4, CD8, and intracellular IFN γ expression. ( a ) Percentage of CD4 + and CD8 + lymphocytes, and the percentage of CD4 + and CD8 + lymphocytes expressing IFN γ . The data are the mean (±S.E.M.) for six individual mice from two separate experiments with three of each genotype/experiment. ( b ) p47 phox−/− CD8 + T lymphocytes effectively kill target cells. On post infection days 3 and 7, as indicated, spleen-derived CD8 + T cells were co-cultured with CFSE-labeled EL4 or E.G7-OVA target cells at the indicated effect: target cell ratios for 4 h. The results are presented as percentage of PI + E.G7-OVA or EL4 target cells. Results are the mean (±S.E.M.) of three independent experiments including three of each genotype/experiment. ( c ) On post infection day 3, the percentage of non-viable EMA + CD4 + or EMA + CD8 + lymphocytes was determined. The data are the mean (±S.E.M.) percentage for five individual mice. * P <0.005, ** P <0.05
Article Snippet: The killing assay was performed by co-culturing CD8 + lymphocytes with CFSE-labeled control EL4 cells (ATCC, Manassas, VA, USA) or the OVA-expressing EL4 derivative cell line E.G7-OVA (ATCC) at the indicated effect: target cells ratios.
Techniques: Infection, Incubation, Staining, Expressing, Derivative Assay, Cell Culture, Labeling