Cytokine and NOS2 expression in the brains and eyes of <i>T. gondii</i>-infected B6 and PKR^−/− mice.

<p>B6 and PKR^−/− mice were infected i.p. with 10 cysts of the ME49 strain of <i>T. gondii</i>. Mice were euthanized 4 weeks post-infection and RNA was isolated from brains (<i>A</i>) and eyes (<i>B</i>). Levels of IFN-γ, TNF-α, NOS2, IL-6 and IL-10 were examined by quantitative PCR and normalized against the levels of 18s rRNA. Results are shown as the mean ± SEM and are representative of 3–4 independent experiments. *p<0.05.