Since the oxytocin receptor and GABA(B) receptor are both required for the oxytocin‐induced reduction of the excitatory synaptic inputs to SNc DA neurons, we further evaluated the involvement of the oxytocin receptor and GABA(B) receptor by pharmacologically blocking these receptors in oxytocin‐induced protection in the MPTP‐induced PD model. This evidence concerns the gene OXTR and Parkinson disease.