TBXT and early-onset autosomal dominant Alzheimer disease: RBCs circulation in the blood stream exposes them to the influence of toxic pathological proteins (such as Aβ peptide, α-syn, τ-protein and their heterocomplexes) that propagate and accumulate in Alzheimer’s disease (AD), Parkinson’s disease (PD), and amyotrophic lateral sclerosis (ALS) [17,33,34,35].