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Related Experiment Videos

Apolipoprotein E polymorphism and response to electroconvulsive therapy.

M Fisman1, K Rabheru, R A Hegele

  • 1Geriatric Psychiatry Program, London Psychiatric Hospital, Ontario, Canada.

The Journal of ECT
|April 3, 2001
PubMed
Summary

The apolipoprotein E (APOE) E4 genotype may predict electroconvulsive therapy (ECT) response in patients with late-onset depression. This genetic marker could aid treatment decisions for specific patient groups.

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Background:

  • Electroconvulsive therapy (ECT) is an effective treatment for severe depression.
  • Predicting ECT response remains a clinical challenge.
  • The role of genetic factors, such as apolipoprotein E (APOE) genotype, is being investigated.

Purpose of the Study:

  • To investigate the association between apolipoprotein E (APOE) genotype and electroconvulsive therapy (ECT) response in patients with affective or schizoaffective disorder.
  • To identify potential genetic markers for predicting ECT outcomes.

Main Methods:

  • Retrospective analysis of 34 patients meeting DSM-III-R criteria for affective or schizoaffective disorder who received ECT.
  • Assessment of ECT response using the Clinical Global Inventory and Montgomery Asberg Depression Rating Scale.

Related Experiment Videos

  • APOE genotyping performed on DNA extracted from blood samples, blinded to clinical status.

    • Main Results:

    • A significant difference in APOE E4 genotype distribution was observed between ECT responders and non-responders (p < 0.02).
    • The E4 genotype was associated with a lower frequency of psychosis (p = 0.046) and a trend towards later onset of depression (p = 0.10).
    • The E3/3 genotype was exclusively found in patients with early-onset depression.

    Conclusions:

    • The APOE E4 genotype may identify a subgroup of patients with late-onset depression who are likely to respond to ECT.
    • APOE genotyping could serve as a predictive marker in treatment decision-making for late-onset depression.
    • Further prospective studies are needed to validate these findings.