It has been established that increased levels of lactylated of
tau protein in the brain and CNS is associated with tauopathies and neurodegenerative diseases, and increased levels of lactylated
lysine on
tau protein has been established as a marked for AD. Compositions and methods for the detection and treatments of tauopathies have been developed. In some forms, the methods identify and quantify lactylated
lysine on
tau protein in a biological sample from a subject to diagnose a
tauopathy, such as AD. In some forms, the methods identify a subject as having or at risk of having a
tauopathy. In some forms, the methods include treating the
tauopathy. Compositions to identify a tauopathy include lactylated tau binders, such as antibodies are also described. Compositions to treat or prevent a tauopathy, such as lactylated tau peptides having a defined lactyllysine, are also described.