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Related Experiment Videos

Tau gene mutations and their effects.

Michel Goedert1

  • 1Medical Research Council Laboratory of Molecular Biology, Cambridge, UK. mg@mrc-lmb.cam.ac.uk

Movement Disorders : Official Journal of the Movement Disorder Society
|August 11, 2005
PubMed
Summary
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Tau protein dysfunction causes neurodegenerative diseases like Alzheimer's. Mutations in the Tau gene lead to abnormal tau protein accumulation and disease, clarifying the cause-and-effect relationship in these conditions.

Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • Tau protein forms intracellular filaments in neurodegenerative diseases.
  • The causal relationship between tau dysfunction and disease onset was previously unclear.
  • Frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17) is an inherited tauopathy.

Purpose of the Study:

  • To elucidate the role of Tau gene mutations in neurodegenerative disease pathogenesis.
  • To determine whether Tau mutations cause disease or are a consequence of it.
  • To investigate the impact of Tau mutations on tau protein function and isoform ratios.

Main Methods:

  • Genetic analysis of Tau mutations in FTDP-17 patients.
  • Biochemical assays to assess tau protein interaction with microtubules.

Related Experiment Videos

  • Analysis of tau protein aggregation propensity.
  • Investigation of RNA-level effects on tau isoform expression.

    • Main Results:

    • Tau mutations are definitively causative for FTDP-17.
    • Mutations affect tau protein at the gene and RNA levels.
    • Protein-level mutations impair microtubule binding and promote filament assembly.
    • RNA-level mutations alter the ratio of tau isoforms, favoring four-repeat tau.

    Conclusions:

    • Tau gene mutations are a direct cause of neurodegenerative diseases.
    • Understanding tauopathies provides insights into Alzheimer's disease and related disorders.
    • The H1 haplotype of Tau is a risk factor for specific tauopathies.