The present invention relates to a class of monoclonal antibody that specifically binds the phosphorylated serine 396 residue on pathological hyperphosphorylated (PHF) tau (pS396) with improved affinity, as well as to methods of using these molecules and their tau binding fragments in the treatment of Alzheimer’s disease and other tauopathies.本發明涉及一類單株抗體,其特異性地以改進的親和力結合病理性過度磷酸化(PHF)τ蛋白上的磷酸化絲胺酸396殘基(pS396),並且涉及在阿茲海默症和其他τ蛋白病變的治療中使用該等分子以及它們的τ蛋白結合片段之方法。