GJA1 and Alzheimer disease: These eight hubs (GAPDH, RPS27A, GFAP, B2M, CLU, EEF2, GJA1, and CP) have all previously been found to be involved in the process of AD (Deane et al., 2005; Li et al., 2005; Olah et al., 2011; El Kadmiri et al., 2014; Guerreiro et al., 2015; Kamphuis et al., 2015; Almeida et al., 2018; Karagkouni et al., 2018).