In the first study (Darricau et al., 2024; Darricau et al., 2022), two ~7 years old rhesus monkeys were injected into the supranigral area with sarkosyl-insoluble tau seeds extracted from the frontal cortex and mesencephalon of two PSP patients, one with pure PSP pathology, and one with a combination of PSP and Braak stage II AD tauopathy. Here, MAPT is linked to supranuclear palsy, progressive, 1.