NGF is a neurotrophic factor that promotes the growth of neuritis during development and provides trophic support to sensory neurons, sympathetic neurons, and some cholinergic neurons [8,9], presents trophic actions in the cells of the endocrine and immune system, participates in acute inflammatory responses [10], and responds to stress to regulate the functions of the anterior pituitary cells [11]. This evidence concerns the gene NGF and neuritis.