Interestingly, the results show 52% increase in DCX/NeuN+ cells in the PC of the middle-aged T2D GK rats versus non-diabetic control rats (38.5 ± 4.7 vs. 25.3 ± 3.6 cells, p = 0.049; Fig. 4i-o). This evidence concerns the gene DCX and type 2 diabetes mellitus.