BACE1 and early-onset autosomal dominant Alzheimer disease: For Alzheimer's disease, miR‐21 attenuates neural inflammation, and miR‐124 regulates beta‐site amyloid precursor protein (APP) cleaving enzyme 1 (BACE1) (Amakiri et al., 2019; Jeske et al., 2020; Reddy et al., 2017).