Your browser doesn't support javascript.
loading
Polygenic resilience score may be sensitive to preclinical Alzheimer's disease changes.
Eissman, Jaclyn M; Wells, Greyson; Khan, Omair A; Liu, Dandan; Petyuk, Vladislav A; Gifford, Katherine A; Dumitrescu, Logan; Jefferson, Angela L; Hohman, Timothy J.
Afiliação
  • Eissman JM; Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN 37212, USA.
Pac Symp Biocomput ; 28: 449-460, 2023.
Article em En | MEDLINE | ID: mdl-36540999
ABSTRACT
Late-onset Alzheimer's disease (LOAD) is a polygenic disorder with a long prodromal phase, making early diagnosis challenging. Twin studies estimate LOAD as 60-80% heritable, and while common genetic variants can account for 30% of this heritability, nearly 70% remains "missing". Polygenic risk scores (PRS) leverage combined effects of many loci to predict LOAD risk, but often lack sensitivity to preclinical disease changes, limiting clinical utility. Our group has built and published on a resilience phenotype to model better-than-expected cognition give amyloid pathology burden and hypothesized it may assist in preclinical polygenic risk prediction. Thus, we built a LOAD PRS and a resilience PRS and evaluated both in predicting cognition in a dementia-free cohort (N=254). The LOAD PRS had a significant main effect on baseline memory (ß=-0.18, P=1.68E-03). Both the LOAD PRS (ß=-0.03, P=1.19E-03) and the resilience PRS (ß=0.02, P=0.03) had significant main effects on annual memory decline. The resilience PRS interacted with CSF Aß on baseline memory (ß=-6.04E-04, P=0.02), whereby it predicted baseline memory among Aß+ individuals (ß=0.44, P=0.01) but not among Aß- individuals (ß=0.06, P=0.46). Excluding APOE from PRS resulted in mainly LOAD PRS associations attenuating, but notably the resilience PRS interaction with CSF Aß and selective prediction among Aß+ individuals was consistent. Although the resilience PRS is currently somewhat limited in scope from the phenotype's cross-sectional nature, our results suggest that the resilience PRS may be a promising tool in assisting in preclinical disease risk prediction among dementia-free and Aß+ individuals, though replication and fine-tuning are needed.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Doença de Alzheimer Tipo de estudo: Diagnostic_studies / Etiology_studies / Observational_studies / Prevalence_studies / Prognostic_studies / Risk_factors_studies / Screening_studies Aspecto: Patient_preference Limite: Humans Idioma: En Revista: Pac Symp Biocomput Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Doença de Alzheimer Tipo de estudo: Diagnostic_studies / Etiology_studies / Observational_studies / Prevalence_studies / Prognostic_studies / Risk_factors_studies / Screening_studies Aspecto: Patient_preference Limite: Humans Idioma: En Revista: Pac Symp Biocomput Ano de publicação: 2023 Tipo de documento: Article