Mutations in connexins in the cochlear epithelium, in particular mutation of Cx26, is known to be a common cause of congenital hearing loss (Avraham, 2001; Liu et al., 2001; Hoang Dinh et al., 2009; Lee and White, 2009; Martinez et al., 2009; Sun et al., 2009; Hong et al., 2010; Jagger and Forge, 2015; Wingard and Zhao, 2015). This evidence concerns the gene GJB2 and hearing loss disorder.