functional genetic polymorphisms in the NgR gene previously associated with schizophrenia have been reported to directly affect the interactions between NgR and its co-receptors p75 and TROY in in vitro neuronal culture. Patients with 22q11 deketion syndrome(including the NgR gene locus) showed schizophrenia related endophenotypes including impaired working memory,impaired prepulse inhibition and other cognitive dysfunctions.An in crease in the levels of the Nogo ligand mRNA has also been reported in schizophrenia patients,supporting the hypothesis that the stimulation of NgR may be altered in schizophrenia.However,little is know regarding the genetic implication of NgR co-receptors p75 and TROY in the genetic susceptibility of schizophrenia.