Cognitively normal women with Alzheimer's disease proteinopathy show relative preservation of memory but not of hippocampal volume

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Abstract

BACKGROUND: We examined interactive effects of sex, diagnosis, and cerebrospinal fluid (CSF) amyloid beta/phosphorylated tau ratio (Aβ/P-tau) on verbal memory and hippocampal volumes. METHODS: We assessed 682 participants (350 women) from BioFINDER (250 cognitively normal [CN]; and 432 symptomatic: 186 subjective cognitive decline [SCD], 246 mild cognitive impairment [MCI]). General linear models evaluated effects of Alzheimer's disease (AD) proteinopathy (CSF Aß/p-tau ratio), diagnosis, and sex on verbal memory (ADAS-cog 10-word recall), semantic fluency (animal naming fluency), visuospatial skills (cube copy), processing speed/attention functions (Symbol Digit Modalities Test and Trail Making Part A), and hippocampal volumes. RESULTS: Amyloid-positive (Aβ/P-tau+) CN women (women with preclinical AD) showed memory equivalent to amyloid-negative (Aβ/P-tau-) CN women. In contrast, Aβ/P-tau+ CN men (men with preclinical AD) showed poorer memory than Aβ/P-tau- CN men. Symptomatic groups showed no sex differences in effect of AD proteinopathy on memory. There was no interactive effect of sex, diagnosis, and Aβ/P-tau on other measures of cognition or on hippocampal volume. CONCLUSIONS: CN women show relatively preserved verbal memory, but not general cognitive reserve or preserved hippocampal volume in the presence of Aβ/P-tau+. Results have implications for diagnosing AD in women, and for clinical trials.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • University of Nevada, Las Vegas
  • University of California, San Diego
  • Skåne University Hospital
  • Lou Ruvo Center for Brain Health
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Neurologi

Nyckelord

Originalspråkengelska
Artikelnummer109
TidskriftAlzheimer's Research & Therapy
Volym11
Utgåva nummer1
StatusPublished - 2019 dec 26
PublikationskategoriForskning
Peer review utfördJa