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Related Concept Videos

Human Genetics01:28

Human Genetics

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...
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu01:29

Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu

Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
Depressive Disorders: Etiology01:27

Depressive Disorders: Etiology

Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
Biological Factors in Depression
Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...
Principles of Pharmacogenetics: Types of Genetic Variants01:27

Principles of Pharmacogenetics: Types of Genetic Variants

The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
Depression: Overview01:18

Depression: Overview

Depression is a prevalent mental illness marked by persistent sadness and lack of interest in previously enjoyable activities. It can take several forms, including major depression, persistent depressive disorder, and bipolar I and II disorders. Symptoms range from emotional changes like chronic worry to physical changes like sleep disturbances and suicidal thoughts. From a neurobiological perspective, depression is believed to be triggered by abnormalities in the brain's prefrontal cortex,...
Comparing Copy Number Variations and SNPs02:26

Comparing Copy Number Variations and SNPs

Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...

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Updated: Jul 5, 2026

The Forced Swim Test as a Model of Depressive-like Behavior
05:42

The Forced Swim Test as a Model of Depressive-like Behavior

Published on: March 2, 2015

Genetic variants in major depression.

Jonathan Flint1, Sagiv Shifman, Marcus Munafo

  • 1Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, UK.

Novartis Foundation Symposium
|May 24, 2008
PubMed
Summary
This summary is machine-generated.

Genetic studies show major depression susceptibility is complex. While genetics play a role, identifying specific genes requires larger samples and advanced methods beyond current approaches.

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Mapping Alzheimer's Disease Variants to Their Target Genes Using Computational Analysis of Chromatin Configuration
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Mapping Alzheimer's Disease Variants to Their Target Genes Using Computational Analysis of Chromatin Configuration

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The Forced Swim Test as a Model of Depressive-like Behavior
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Mapping Alzheimer's Disease Variants to Their Target Genes Using Computational Analysis of Chromatin Configuration
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Area of Science:

  • Psychiatry
  • Genetics
  • Behavioral Science

Background:

  • Major depression is a leading global cause of disability.
  • Additive genetic factors account for over 30% of depression liability.
  • Traditional genetic methods have yielded limited success in identifying susceptibility genes.

Purpose of the Study:

  • To explore the complex genetic architecture of affective illness.
  • To investigate the genetic basis of neuroticism as a proxy for depression susceptibility.
  • To evaluate the effectiveness of current genetic methodologies.

Main Methods:

  • Whole genome association study (WGS) of neuroticism.
  • Analysis of genetic susceptibility loci shared between neuroticism and depression.
  • Examination of individual gene effect sizes.

Main Results:

  • Genetic architecture of affective illness is more complex than anticipated.
  • Whole genome association study of neuroticism revealed individual effect sizes below 1%.
  • Standard genetic methodologies have shown limited success in identifying depression susceptibility genes.

Conclusions:

  • Identifying the molecular basis of major depression requires larger sample sizes.
  • More sophisticated analytical approaches are necessary for future genetic studies.
  • Gene by environment interactions and endophenotypes may offer alternative research avenues.