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MAPT Subhaplotypes in Different Progressive Supranuclear Palsy Phenotypes.

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The MAPT gene

Keywords:
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Area of Science:

  • Neurogenetics
  • Neurodegenerative Diseases
  • Tauopathies

Background:

  • Progressive Supranuclear Palsy (PSP) is a rare neurodegenerative disorder.
  • Abnormal tau protein aggregation is a hallmark of PSP.
  • The MAPT gene, encoding tau protein, is implicated in PSP pathogenesis.

Purpose of the Study:

  • To investigate the association of MAPT haplotypes and subhaplotypes with PSP risk.
  • To analyze genetic variations in the MAPT locus in a Southern Italian cohort.

Main Methods:

  • Genotyping of rs8070723 and five other MAPT variants in 73 PSP patients and 93 healthy controls.
  • Haplotype and subhaplotype analysis to determine genetic associations with PSP.

Main Results:

  • The H1 haplotype showed an increased risk (OR, 2.620; p=0.0035), while the H2 haplotype showed a protective effect (OR, 0.370; p=0.0015).
  • Eighteen distinct MAPT H1 subhaplotypes were identified.
  • The H1j subhaplotype was associated with a reduced risk of PSP (OR, 0.201; p=0.0265).

Conclusions:

  • MAPT genetic variations significantly influence PSP susceptibility.
  • Haplotype diversity within the MAPT locus plays a crucial role in PSP pathogenesis.
  • Further research into MAPT subhaplotypes may reveal novel therapeutic targets.