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Basic Science and Pathogenesis.

Alaina Durant1, Skylar Walters2, Emily R Mahoney2

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Summary
This summary is machine-generated.

SuperAgers, individuals aged 80+ with youthful memory, show genetic links to Alzheimer's disease (AD) loci APOE and BIN1. A novel locus, RNF150, was also identified in this SuperAging genome-wide association study (GWAS).

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Area of Science:

  • Genetics and Aging Research
  • Neuroscience and Cognitive Health
  • Genomic Epidemiology

Background:

  • SuperAgers are defined as individuals aged 80 and above exhibiting cognitive abilities comparable to those in their 50s and 60s.
  • This study aims to uncover the genetic underpinnings of SuperAging through a genome-wide association study (GWAS).

Purpose of the Study:

  • To identify genetic variants associated with the exceptional cognitive resilience observed in SuperAgers.
  • To compare the genetic profiles of SuperAgers with those of Alzheimer's disease (AD) cases and cognitively normal controls across different age groups.

Main Methods:

  • Utilized harmonized longitudinal cognitive data (memory, executive function, language) from participants of European ancestry.
  • Defined SuperAgers (N=1,171) based on exceptional memory, normal executive function and language, and sustained cognitive normality.
  • Conducted logistic regression-based GWAS comparing SuperAgers against AD cases (N=5,372) and controls (N=4,012) across age strata, adjusting for covariates.

Main Results:

  • Genome-wide significant (GWS) associations were found in the APOE and BIN1 loci when comparing SuperAgers to middle-aged AD cases.
  • A novel GWS association was identified on chromosome 4 (rs79973832), implicating the RNF150 gene, previously unlinked to AD.
  • APOE region GWS associations were also observed when comparing SuperAgers to older AD case groups, while no GWS associations were found in controls.

Conclusions:

  • The GWAS identified established AD genes (APOE, BIN1) and a novel locus (rs79973832/RNF150) associated with the SuperAging phenotype.
  • Older AD case comparisons revealed significant associations primarily within the APOE region.
  • Future research, including rare variant analysis via Whole Genome Sequencing (WGS), is warranted to further elucidate the genetic architecture of SuperAging.