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Related Experiment Videos

Behavioral changes associated with different apolipoprotein E genotypes in dementia

R Cacabelos1, B Rodríguez, C Carrera

  • 1EuroEspes Biomedical Research Center, Institute for CNS Disorders, La Coruña, Spain.

Alzheimer Disease and Associated Disorders
|January 1, 1997
PubMed
Summary
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Alzheimer disease (AD) behavioral changes like anxiety and psychosis were linked to the APO E-3/3 genotype. Other symptoms, including agitation and depression, were more common in APO E-4/4 and APO E-3/4 genotypes.

Area of Science:

  • Neuroscience
  • Genetics
  • Gerontology

Background:

  • Behavioral dysfunction affects up to 67% of Alzheimer disease (AD) patients, significantly impacting their quality of life and institutionalization rates.
  • Worsening behavioral symptoms in AD correlate with decreased patient survival and can be exacerbated by common AD medications.
  • Behavioral changes in AD are influenced by various factors, including disease stage, environment, comorbidities, medications, and apolipoprotein E (APO E) genotype.

Purpose of the Study:

  • To investigate the association between different apolipoprotein E (APO E) genotypes and the phenotypic expression of noncognitive behavioral symptoms in Alzheimer disease (AD).

Main Methods:

  • Analysis of behavioral dysfunction, anxiety, and psychoses in AD patients.
  • Categorization of patients based on APO E genotypes (APO E-4/4, APO E-3/4, and APO E-3/3).

Related Experiment Videos

  • Comparison of symptom prevalence across different APO E genotypes.

    • Main Results:

    • Alzheimer disease (AD) behavioral dysfunction, anxiety, and psychoses were frequently observed in patients with the APO E-3/3 genotype.
    • Disorientation, agitation, depression, and motor disorders were more common in patients with APO E-4/4 and APO E-3/4 genotypes.
    • While not statistically significant, these findings suggest a potential influence of APO E genotype on specific noncognitive symptom presentation in AD.

    Conclusions:

    • Different APO E genotypes may influence the specific types of behavioral and noncognitive symptoms experienced by individuals with Alzheimer disease (AD).
    • Understanding these genotype-phenotype correlations could aid in personalized management strategies for AD behavioral symptoms.