神经营养因子在保护神经元存活并促进其突起生长发育过程中 ,常出现基因表达的时相变异 ,对不同种类的神经元有明显的作用选择性。脑源性神经营养因子 (BDNF)作为神经营养因子家族中的一员 ,广泛分布于大脑中 ,是一类可促进运动神经元、感觉神经元、基底节前脑胆碱能神经元、皮 Neurotrophic factors in the protection of neurons survival and promote their process of protrusion and development, often appear gene expression of phase variation, different types of neurons have obvious role in selectivity. Brain-derived neurotrophic factor (BDNF), a member of the neurotrophic factor family, is widely distributed in the brain and is a class of neurotrophins that promote motor neurons, sensory neurons, basal ganglia, cholinergic neurons,