The effect of an APOE polymorphism on cognitive function depends on age
Min-Ho Shin1, Sun-Seog Kweon, Jin-Su Choi
1Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea.
Journal of Neurology
|October 23, 2013
Summary
The APOE E4 gene variant impacts cognitive function differently based on age and education. Older adults with APOE E4 showed lower cognitive scores, while younger adults showed higher scores, with education playing a modifying role.
Area of Science:
- Neuroscience
- Genetics
- Cognitive Science
Background:
- The association between the Apolipoprotein E (APOE) E4 genotype and cognitive function in the general population remains debated.
- Understanding how APOE E4 influences cognition across different age groups is crucial for public health.
Purpose of the Study:
- To investigate the relationship between the APOE E4 genotype and cognitive function.
- To determine if age modifies the effect of APOE E4 on cognitive performance.
- To explore the role of education in the APOE E4-cognition association.
Main Methods:
- A large cohort of 10,371 Koreans aged 45-74 years was analyzed.
- Cognitive function was assessed using the Korean version of the modified Mini-Mental State Examination (K-mMMSE).
- Multiple linear and logistic regression models were employed to analyze APOE genotype, age, education, and cognitive scores.
Main Results:
- APOE E4 heterozygotes and homozygotes aged 65-74 years exhibited lower K-mMMSE scores (1.3% and 7.3% lower, respectively) compared to non-carriers.
- Conversely, APOE E4 carriers aged 45-55 years showed higher K-mMMSE scores (0.8% and 4.6% higher, respectively).
- Educational attainment significantly modified the APOE E4 effect in younger adults (45-54 years), with non-formally educated E4 carriers showing higher cognitive function.
Conclusions:
- The influence of the APOE E4 genotype on cognitive function is age-dependent.
- Educational background plays a significant role in modulating the APOE E4 effect on cognition, particularly in younger age groups.
- These findings highlight the complex interplay between genetics, age, and education in shaping cognitive trajectories.
More Related Videos
10:13Assessment of Age-related Changes in Cognitive Functions Using EmoCogMeter, a Novel Tablet-computer Based Approach
Published on: February 14, 2014
12.4K
09:37A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
Published on: July 14, 2016
7.7K
Related Concept Videos
01:29Alzheimer Disease l: Introduction
38
Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
38
01:30Cognitive Development During Adulthood
1.4K
Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
1.4K
01:27Pharmacodynamics in Geriatric Patients: Effects of Age
378
Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
378
01:18Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism
406
Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...
406
01:28Human Genetics
2.0K
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
2.0K
01:22Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption
868
As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
868