In the same manner, as described below, immunohistochemistry for DCX was performed (Park et al., 2019 (link)). The sections were treated with PBS for 10 min and then treated again with 1% H2O2 for 20 min. The sections were treated with goat anti-DCX antibody (1:1,000; Oncogene Research Product, Cambridge, UK) for 2 hr. The sections were treated with the biotinylated goat secondary antibody (1:500; Vector Laboratories, Burlingame, CA, USA) for another 1 hr, washed, and treated with ABC complex (1:100; Vector Laboratories). Using the 0.03% diaminobenzidine, labeling was visualized and the sections were mounted onto gelatin-coated slides. After air drying the slides at room temperature overnight, the coverslips were mounted using Permount (Thermo Fisher Scientific Inc., Waltham, MA, USA).