Figure 3. Quantitative expression of interferon gamma (IFN-γ) (A) and transforming growth factor-β1 (TGF-β) (B) mRNA, as isolated from the intestinal mucosa of control mice and mice on TPN (n = 6 per group). Quantitative analysis was done after the cells in the intestinal mucosa were biomagnetically separated into CD8αα+ and CD8αβ+ groups. *P < .05 and **P < .01 comparing cytokine expression between thymic-independent (CD8αα+) and thymic-dependent (CD8αβ+) populations.