The analysis of the neuronal profile area (μm2) of the nNOS-ir neurons showed a 9.45% increase in the area of neurons in the Colitis group (234.0 ± 3.8 μm2) when compared to the Sham group (213.8 ± 1.5 μm2; p < 0.001) and a 7.05% reduction in the area of these neurons in the Butyrate group (217.5 ± 0.9 μm2; p < 0.01) when compared to the Colitis group (Figure 7A). The gene discussed is NOS1; the disease is colitis.