The AD proteinopathic tau protein is normally involved in the stabilization of microtubules, and mutated tau (i.e., resulting from a mutation in the MAPT gene) is reported to influence the spread of cancer cells and cell growth (Wang and Mandelkow, 2016; Jimenez-Blasco et al., 2024; Rossi et al., 2018). The gene discussed is MAPT; the disease is Alzheimer disease.