These observations raised the possibility that some of the changes in circRNA expression in the AD brain might reflect the response to oTau toxicity, consistent with Cervera-Carles et al., who noted similar responses of circRNAs between FTD-tau (but not FTD-TDP-43) and AD (Cervera-Carles et al., 2020). The gene discussed is MAPT; the disease is frontotemporal dementia.