There were significant differences between the AD‐ns group and AD‐ap group and between the WT‐ns group and AD‐ns group according to Tukey's multiple‐comparisons test [AD‐ns vs AD‐ap, p = 0.0469, WT‐ns vs. AD‐ns, p = 0.0010] (Figure 2C). This evidence concerns the gene DHCR7-DT and Alzheimer disease.