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Related Concept Videos

Obsessive-Compulsive Disorder01:28

Obsessive-Compulsive Disorder

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Obsessive-compulsive disorder (OCD) is a mental health condition characterized by recurrent obsessions, compulsions, or both, which consume significant time and interfere with daily functioning. Obsessions involve persistent, intrusive, and unwanted thoughts, images, or urges that evoke anxiety. Common examples include irrational fears of contamination or harm. Compulsions are repetitive behaviors or mental acts performed to reduce the anxiety caused by obsessions. For instance, individuals...
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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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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.
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Behavioral Genetics and Its Designs01:23

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Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
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Generalized Anxiety Disorder (GAD) is a chronic condition characterized by excessive and uncontrollable worry that persists for at least six months, significantly interfering with daily functioning. Unlike situational anxiety, which arises in response to specific stressors, GAD often occurs without a clear cause. Individuals may experience disproportionate worry about work, health, or relationships. For instance, a person might continuously fear poor health despite normal medical evaluations or...
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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Updated: Jun 27, 2025

Signal Attenuation as a Rat Model of Obsessive Compulsive Disorder
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Genome-wide analyses identify 30 loci associated with obsessive-compulsive disorder.

Nora I Strom1,2,3,4, Zachary F Gerring5,6, Marco Galimberti7,8

  • 1Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany.

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Summary
This summary is machine-generated.

This large genome-wide association study identified 30 new genetic markers for obsessive-compulsive disorder (OCD) and 249 candidate risk genes. Findings implicate specific brain cell types and highlight genetic links with other psychiatric conditions.

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Area of Science:

  • Genetics
  • Psychiatry
  • Neuroscience

Background:

  • Obsessive-compulsive disorder (OCD) affects approximately 1% of the population and has high heritability, but its genetic basis remains poorly understood.
  • Previous genome-wide association studies (GWAS) have yielded limited insights into the genetic etiology and biological mechanisms of OCD.

Purpose of the Study:

  • To conduct a large-scale GWAS meta-analysis to identify genetic risk factors for OCD.
  • To explore the genetic architecture of OCD and identify candidate risk genes.
  • To investigate the biological underpinnings and phenotypic correlations of OCD.

Main Methods:

  • A meta-analysis of GWAS data from 53,660 OCD cases and 2,044,417 controls of European ancestry.
  • Utilized functional and positional quantitative trait locus (QTL) gene-based approaches to identify candidate risk genes.
  • Performed tissue and single-cell enrichment analyses and examined genetic correlations with 112 other phenotypes.

Main Results:

  • Identified 30 independent genome-wide significant single nucleotide polymorphisms (SNPs) and a SNP-based heritability of 6.7% for OCD.
  • Discovered 249 significant candidate risk genes, with 25 identified as putatively causal, including WDR6, DALRD3, CTNND1, and genes in the MHC region.
  • Highlighted the role of hippocampal and cortical excitatory neurons, and dopamine receptor-containing medium spiny neurons in OCD risk. Found significant genetic correlations with psychiatric disorders, autoimmune disorders, educational attainment, and BMI.

Conclusions:

  • This study significantly advances the understanding of the genetic landscape of OCD.
  • Identified key candidate genes and cell types involved in OCD pathogenesis.
  • Provides a foundation for developing future interventions for OCD by elucidating its genetic architecture and phenotypic associations.