For example, studies have found that FGF20 can reduce the loss of dopaminergic neurons in vitro and provide functional protection in a rat model of Parkinson’s disease induced by 6-hydroxydopamine.[46] In addition, FGF20 promotes angiogenesis and vascular repair after traumatic brain injury by regulating the Wnt/β-catenin signaling pathway.[47]The expression level of FGF20 in BC is relatively low. The gene discussed is FGF20; the disease is Parkinson disease.