Phosphorylated tau protein is integrated into paired helical filaments in Alzheimer's disease.
Antisera to paired helical filaments (PHF) were found to contain a significant amount of tau antibodies specific for a phosphorylated form, but only a negligible amount of those specific for a non-phosphorylated form. Also, the phosphorylated tau-specific antibodies, but not the non-phosphorylated tau-specific ones, labeled neurofibrillary tangles isolated in the presence of sodium dodecyl sulfate (SDS) and stained both tangles and senile plaque neuritis in fixed tissue sections in a very similar way to as the whole antiserum did. Taken together, these results strongly suggest that a major antigenic determinant of PHF is phosphorylated tau itself.
D000544:Alzheimer Disease / Q000378:metabolism*; D000818:Animals; D001921:Brain / Q000378:metabolism; D003599:Cytoskeleton / Q000378:metabolism*; D006801:Humans; D007120:Immunochemistry; D008869:Microtubule-Associated Proteins / Q000378:metabolism*; D010766:Phosphorylation; D051381:Rats; D013194:Staining and Labeling; D016875:tau Proteins
D008869:Microtubule-Associated Proteins; D016875:tau Proteins