Interestingly, BDNF levels have also been associated with ASD-like traits in the general population (Brondino et al., 2018), and recent meta-analysis studies suggest that BDNF levels may be considered as a possible biomarker for autism (Qin et al., 2016; Zheng et al., 2016; Armeanu et al., 2017; Saghazadeh and Rezaei, 2017). The gene discussed is BDNF; the disease is autism.