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Basic Science and Pathogenesis.

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Researchers identified genetic variants in the HIVEP3 gene associated with cognitive SuperAging (SA) in older adults. These findings suggest HIVEP3 may play a role in maintaining exceptional cognitive function and protecting against Alzheimer's disease.

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Area of Science:

  • Genetics
  • Neuroscience
  • Gerontology

Background:

  • Exceptional cognitive performance in older adults offers insights into Alzheimer's disease (AD) protective mechanisms.
  • Cognitive SuperAgers (SA) are individuals aged 80+ with superior episodic memory.
  • This study investigates genetic factors associated with SA in the Amish population.

Purpose of the Study:

  • To identify genetic variants linked to cognitive SuperAging (SA) using family- and association-based analyses.
  • To explore the role of HIVEP3 gene variants in exceptional cognitive performance and AD risk.

Main Methods:

  • Neuropsychological evaluation of 515 Amish participants.
  • SA defined as age ≥ 80 with memory performance exceeding younger norms.
  • Linkage analysis (MERLIN) and association testing (GENESIS) of genetic variants.

Main Results:

  • Genome-wide linkage analysis revealed significant scores on chromosomes 1, 2, 7, 16, and 20.
  • Significant associations found for HIVEP3 gene variants on chromosome 1, particularly rs12734651, in SA compared to AD.
  • Nominal association of HIVEP3 variants was observed when comparing SA to cognitively unimpaired, age-matched individuals.

Conclusions:

  • Genetic variants in the HIVEP3 gene are associated with cognitive SuperAging (SA).
  • HIVEP3 variants may influence both AD risk and cognitive trajectories.
  • HIVEP3 is a candidate gene for further research into mechanisms of exceptional cognitive aging.