“This blood test clearly identifies Alzheimer’s tau tangles, which is our best biomarker measure of Alzheimer’s symptoms and dementia,” co-senior author Dr. Randall Bateman, a professor of neurology at the Washington University School of Medicine in St. Louis, said in a news release.

The results suggested that plasma MTBR-tau243 could help estimate the tauopathy load in Alzheimer's disease, improving diagnostic evaluations of Alzheimer's in clinical practice and monitoring the efficacy of tau-targeted therapies in clinical trials, the researchers noted.