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- Title
Protein intake and episodic memory: the moderating role of the apolipoprotein E ε4 status.
- Authors
Keum, Musung; Lee, Boung Chul; Choe, Young Min; Suh, Guk-Hee; Kim, Shin Gyeom; Kim, Hyun Soo; Hwang, Jaeuk; Yi, Dahyun; Kim, Jee Wook
- Abstract
Background: This study investigated the correlation between protein intake and Alzheimer's disease (AD)-related cognitive decline, particularly in episodic memory, among older adults without dementia. Furthermore, we assessed the moderating effect of apolipoprotein ε4 (APOE4) on this association and analyzed its influence on other cognitive functions beyond memory. Methods: The study involved 196 participants who underwent assessments for protein intake, cognitive performance, APOE4 genotyping, and nutritional biomarkers. Protein intake was categorized into low, medium, and high based on the consumption of dairy, legumes, eggs, meat, and fish. Results: High protein intake was significantly associated with better episodic memory and overall cognition. Moreover, a significant interaction was found between high protein intake and APOE4, indicating that APOE4 moderates the association between high protein intake level and episodic memory. Sensitivity analysis confirmed these results among participants with stable food intake. Conclusions: Our study results demonstrated that high protein intake is associated with better episodic memory among older adults without dementia. Furthermore, the findings highlight the significant role of APOE4 status in moderating the relationship between protein consumption and episodic memory. These results suggest that dietary interventions focusing on protein intake could be beneficial for cognitive health, particularly in individuals with a genetic predisposition to AD.
- Subjects
ALZHEIMER'S disease; APOLIPOPROTEIN E; COGNITIVE ability; APOLIPOPROTEIN E4; OLDER people; EPISODIC memory
- Publication
Alzheimer's Research & Therapy, 2024, Vol 16, Issue 1, p1
- ISSN
1758-9193
- Publication type
Article
- DOI
10.1186/s13195-024-01546-0