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  • 1Department of Epileptology, University Hospital Bonn (UKB), 53127 Bonn, Germany.

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Summary

Hyperphosphorylated tau (pTau) may impact cognition in epilepsy, but research findings are inconsistent. Further studies are needed to clarify the relationship between pTau and cognitive decline in temporal lobe epilepsy.

Keywords:
cognitiondementiaepilepsyhippocampushyperphosphorylationneurodegenerationneuropsychologyseizurestautemporal cortex

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Area of Science:

  • Neuroscience
  • Neurology
  • Pathology

Background:

  • Epilepsy and dementia share a complex bidirectional relationship.
  • Hyperphosphorylated tau (pTau) is implicated in cognitive decline.
  • Understanding pTau's role in epilepsy-associated cognitive impairment is crucial.

Purpose of the Study:

  • To review the role of pTau in human epilepsy cognition.
  • To synthesize findings from studies examining pTau burden in temporal lobe epilepsy (TLE).

Main Methods:

  • Literature search for studies on pTau and cognition in epilepsy.
  • Analysis of pTau burden in surgical biopsy specimens from TLE patients.
  • Review of cognitive performance data in relation to pTau.

Main Results:

  • Five studies involving 142 TLE patients were reviewed.
  • pTau prevalence varied widely (3.5%–95%) and its location differed.
  • Two studies (40%) showed an inverse pTau-cognition relationship; one longitudinal study linked pTau to cognitive decline.

Conclusions:

  • The association between pTau and cognition in TLE is unclear due to study heterogeneity.
  • Cognitive impairment in epilepsy is multifactorial, influenced by seizures, pathology, and medication.
  • Longitudinal, noninvasive, whole-brain pTau research is recommended.