Injection of NSCs in (APP/PS1) Tg AD mouse improved expression of N-methyl-d-aspartate (NMDA) 2B unit, synaptophysin, protein kinase C ζ subtypes (PKCζ), tyrosine receptor kinase B (TrkB), and BDNF proteins related to cognitive function [27]. The gene discussed is NTRK2; the disease is Alzheimer disease.