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Current advances on different kinases involved in tau phosphorylation, and implications in Alzheimer's disease and tauopathies.

Abstract

Hyperphosphorylation and accumulation of tau in neurons (and glial cells) is one the main pathologic hallmarks in Alzheimer's disease (AD) and other tauopathies, including Pick's disease (PiD), progressive supranuclear palsy, corticobasal degeneration, argyrophilic grain disease and familial frontotemporal dementia and parkinsonism linked to chromosome 17 due to mutations in the tau gene (FTDP-17-tau). Hyperphosphorylation of tau is regulated by several kinases that phosphorylate specific sites of tau in vitro. GSK-3-immunoprecipitated sarcosyl-insoluble fractions in AD have the capacity to phosphorylate recombinant tau. In addition, GSK-3 phosphorylated at Ser9, that inactivates GSK-3, is found in the majority of neurons with neurofibrillary tangles and dystrophic neurites of senile plaques in AD, and in Pick bodies and other phospho-tau-containing neurons and glial cells in other tauopathies. Increased expression of active kinases, including stress-activated kinase, c-Jun N-terminal kinase (SAPK/JNK) and kinase p38 has been found in brain homogenates in all the tauopathies. Strong active SAPK/JNK and p38 immunoreactivity has been observed restricted to neurons and glial cells containing hyperphosphorylated tau, as well as in dystrophic neurites of senile plaques in AD. Moreover, SAPK/JNK- and p38-immunoprecipitated sub-cellular fractions enriched in abnormal hyperphosphorylated tau have the capacity to phosphorylate recombinant tau and c-Jun and ATF-2 which are specific substrates of SAPK/JNK and p38 in AD and PiD. Interestingly, increased expression of phosphorylated (active) SAPK/JNK and p38 and hyperphosphorylated tau containing neurites have been observed around betaA4 amyloid deposits in the brain of transgenic mice (Tg 2576) carrying the double APP Swedish mutation. These findings suggest that betaA4 amyloid has the capacity to trigger the activation of stress kinases which, in turn, phosphorylate tau in neurites surrounding amyloid deposits. Complementary findings have been reported from the autopsy of two AD patients who participated in an amyloid-beta immunization trial and died during the course of immunization-induced encephalitis. The neuropathological examination of the brain showed massive focal reduction of amyloid plaques but not of neurofibrillary degeneration. Activation of SAPK/JNK and p38 were reduced together with decreased tau hyperphosphorylation of aberrant neurites in association with decreased amyloid plaques in both Tg2576 mice and human brains. These findings support the amyloid cascade hypothesis of tau phosphorylation mediated by stress kinases in dystrophic neurites of senile plaques but not that of neurofibrillary tangles and neuropil threads in AD.

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  • Authors+Show Affiliations

    ,

    Institut de Neuropatologia, Servei Anatomia Patològica, Hospital de Bellvitge, Universitat de Barcelona, Hospitalet de Llobregat, Spain. 8082ifa@comb.es

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    Source

    Current Alzheimer research 2:1 2005 Jan pg 3-18

    MeSH

    Alzheimer Disease
    Animals
    Annelida
    Brain
    Diptera
    Glycogen Synthase Kinase 3
    Humans
    JNK Mitogen-Activated Protein Kinases
    Mice
    Mice, Transgenic
    Microtubule-Associated Proteins
    Neurons
    Oxidative Phosphorylation
    Protein-Serine-Threonine Kinases
    Superoxide Dismutase
    Superoxide Dismutase-1
    p38 Mitogen-Activated Protein Kinases
    tau Proteins

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't
    Review

    Language

    eng

    PubMed ID

    15977985

    Citation

    Ferrer, I, et al. "Current Advances On Different Kinases Involved in Tau Phosphorylation, and Implications in Alzheimer's Disease and Tauopathies." Current Alzheimer Research, vol. 2, no. 1, 2005, pp. 3-18.
    Ferrer I, Gomez-Isla T, Puig B, et al. Current advances on different kinases involved in tau phosphorylation, and implications in Alzheimer's disease and tauopathies. Curr Alzheimer Res. 2005;2(1):3-18.
    Ferrer, I., Gomez-Isla, T., Puig, B., Freixes, M., Ribé, E., Dalfó, E., & Avila, J. (2005). Current advances on different kinases involved in tau phosphorylation, and implications in Alzheimer's disease and tauopathies. Current Alzheimer Research, 2(1), pp. 3-18.
    Ferrer I, et al. Current Advances On Different Kinases Involved in Tau Phosphorylation, and Implications in Alzheimer's Disease and Tauopathies. Curr Alzheimer Res. 2005;2(1):3-18. PubMed PMID: 15977985.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Current advances on different kinases involved in tau phosphorylation, and implications in Alzheimer's disease and tauopathies. AU - Ferrer,I, AU - Gomez-Isla,T, AU - Puig,B, AU - Freixes,M, AU - Ribé,E, AU - Dalfó,E, AU - Avila,J, PY - 2005/6/28/pubmed PY - 2005/10/7/medline PY - 2005/6/28/entrez SP - 3 EP - 18 JF - Current Alzheimer research JO - Curr Alzheimer Res VL - 2 IS - 1 N2 - Hyperphosphorylation and accumulation of tau in neurons (and glial cells) is one the main pathologic hallmarks in Alzheimer's disease (AD) and other tauopathies, including Pick's disease (PiD), progressive supranuclear palsy, corticobasal degeneration, argyrophilic grain disease and familial frontotemporal dementia and parkinsonism linked to chromosome 17 due to mutations in the tau gene (FTDP-17-tau). Hyperphosphorylation of tau is regulated by several kinases that phosphorylate specific sites of tau in vitro. GSK-3-immunoprecipitated sarcosyl-insoluble fractions in AD have the capacity to phosphorylate recombinant tau. In addition, GSK-3 phosphorylated at Ser9, that inactivates GSK-3, is found in the majority of neurons with neurofibrillary tangles and dystrophic neurites of senile plaques in AD, and in Pick bodies and other phospho-tau-containing neurons and glial cells in other tauopathies. Increased expression of active kinases, including stress-activated kinase, c-Jun N-terminal kinase (SAPK/JNK) and kinase p38 has been found in brain homogenates in all the tauopathies. Strong active SAPK/JNK and p38 immunoreactivity has been observed restricted to neurons and glial cells containing hyperphosphorylated tau, as well as in dystrophic neurites of senile plaques in AD. Moreover, SAPK/JNK- and p38-immunoprecipitated sub-cellular fractions enriched in abnormal hyperphosphorylated tau have the capacity to phosphorylate recombinant tau and c-Jun and ATF-2 which are specific substrates of SAPK/JNK and p38 in AD and PiD. Interestingly, increased expression of phosphorylated (active) SAPK/JNK and p38 and hyperphosphorylated tau containing neurites have been observed around betaA4 amyloid deposits in the brain of transgenic mice (Tg 2576) carrying the double APP Swedish mutation. These findings suggest that betaA4 amyloid has the capacity to trigger the activation of stress kinases which, in turn, phosphorylate tau in neurites surrounding amyloid deposits. Complementary findings have been reported from the autopsy of two AD patients who participated in an amyloid-beta immunization trial and died during the course of immunization-induced encephalitis. The neuropathological examination of the brain showed massive focal reduction of amyloid plaques but not of neurofibrillary degeneration. Activation of SAPK/JNK and p38 were reduced together with decreased tau hyperphosphorylation of aberrant neurites in association with decreased amyloid plaques in both Tg2576 mice and human brains. These findings support the amyloid cascade hypothesis of tau phosphorylation mediated by stress kinases in dystrophic neurites of senile plaques but not that of neurofibrillary tangles and neuropil threads in AD. SN - 1567-2050 UR - https://www.unboundmedicine.com/medline/citation/15977985/Current_advances_on_different_kinases_involved_in_tau_phosphorylation_and_implications_in_Alzheimer's_disease_and_tauopathies_ L2 - http://www.eurekaselect.com/79420/article DB - PRIME DP - Unbound Medicine ER -