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The Journal of Alzheimer’s Disease is an international multidisciplinary journal to facilitate progress in understanding the etiology, pathogenesis, epidemiology, genetics, behavior, treatment and psychology of Alzheimer’s disease.
The journal publishes research reports, reviews, short communications, book reviews, and letters-to-the-editor. The journal is dedicated to providing an open forum for original research that will expedite our fundamental understanding of Alzheimer’s disease.
Article Type: Research Article
Abstract: In 1975, Weingarten and colleagues isolated a protein factor that was able to induce microtubule formation. They called this factor tau (t). Some ten years later a new era of research on this microtubule-associated protein was launched when several groups almost simultaneously discovered that tau was the predominant protein component of the paired helical filaments (PHFs) and neurofibrillary tangles (NFTs) which are characteristic pathological lesions of the Alzheimer's disease brain. Subsequent findings that PHF-tau isolated from Alzheimer's disease brain was phosphorylated to a greater extent than non-PHF tau, led to extensive investigation into the posttranslational modifications (mainly phosphorylation) of tau …in normal and Alzheimer's disease brain. The present review highlights the literature concerning the normal functioning and processing of tau protein, and examines the evidence for the involvement of the abnormal posttranslational processing of tau in the pathology of Alzheimer's disease. Finally, speculation as to the relationship between abnormal processing of tau, other subcellular abnormalities seen in Alzheimer's disease, and the pathological causes of the disease are discussed. Show more
Keywords: kinases, oxidative stress, pathology, phosphatases, phosphorylation
Citation: Journal of Alzheimer's Disease, vol. 1, no. 4-5, pp. 307-328, 1999
Article Type: Research Article
Abstract: Tau is a microtubule-associated protein that, in a hyperphosphorylated form, comprises the main component of the paired helical filaments and neurofibrillary tangles found in Alzheimer's Disease (AD) brain. It is therefore important to understand the normal functioning and processing of tau protein, and the abnormal posttranslational processing of tau in AD pathology. In 1996, Johnson and Jenkins reviewed the literature on the biochemistry, function, and phosphorylation of tau in normal and AD brain. Since that time, numerous publications have come out further elucidating the properties of tau. The present review updates the topics originally covered in the 1996 review, as …well as presents a number of new topics. For example, mutations in the tau gene have been found in several non-AD, autosomal dominant neurodegenerative disorders that exhibit extensive neurofibrillary pathology. In addition, there is increasing evidence that tau may be involved in signal transduction, organelle transport, and cell growth, independent of its microtubule-binding functions. Taken together, the research reviewed here demonstrates that tau is a very complex protein with various functions that are intricately regulated. It is clear that more research is required to completely understand the functions and regulation of tau in normal and AD brain. Show more
Keywords: microtubule, phosphorylation, PHF, kinase, phosphatase
Citation: Journal of Alzheimer's Disease, vol. 1, no. 4-5, pp. 329-351, 1999
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