Several studies have reported drastic reductions in brain GLT‐1 expression in Alzheimer's disease (Jacob et al. 2007; Abdul et al. 2009; Hoshi et al. 2018) and Huntington's disease (Liévens et al. 2001; Behrens et al. 2002; Estrada‐Sánchez et al. 2009). This evidence concerns the gene SLC1A2 and early-onset autosomal dominant Alzheimer disease.