While ITGA8 (encoding integrin alpha 8, a type-I transmembrane protein) gene was firstly proved to connect with idiopathic PD in Caucasian population in Simón-Sánchez's study [4], it was not featured as a PD relevant gene until Lill's study revealed its potential association with PD [8]. The gene discussed is ITGA8; the disease is Parkinson disease.