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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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Personality Disorders: Dependent and Obsessive-Compulsive01:24

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Dependent personality disorder and obsessive-compulsive personality disorder are two separate psychological conditions that influence behavior, relationships, and overall life functioning. Though both involve maladaptive behaviors, their core characteristics and motivations differ significantly.
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Schizotypal personality disorder and histrionic personality disorder are two distinct psychological conditions classified under personality disorders, each characterized by unique behavioral patterns and social difficulties. Both disorders significantly affect interpersonal relationships and emotional well-being, leading to social isolation and frustration.
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When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
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Human Genetics01:28

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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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Oppositional Defiant Disorder01:30

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A persistent pattern of angry or irritable mood, defiant behavior, or vindictiveness characterizes Oppositional Defiant Disorder (ODD). Symptoms must occur over at least six months, involve interactions with individuals beyond siblings, and meet specific diagnostic criteria to be clinically significant. The disorder affects emotional regulation, social interactions, and behavior, often manifesting early in life and influencing long-term development and functioning.
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Polygenic Heterogeneity Across Obsessive-Compulsive Disorder Subgroups Defined by a Comorbid Diagnosis.

Nora I Strom1,2,3,4, Jakob Grove3,5,6, Sandra M Meier7

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

Frontiers in Genetics
|September 17, 2021
PubMed
Summary
This summary is machine-generated.

Obsessive-compulsive disorder (OCD) shows genetic heterogeneity in its common comorbidities like major depressive disorder (MDD), attention-deficit hyperactivity disorder (ADHD), and autism spectrum disorder (ASD). This study reveals distinct genetic patterns across OCD subgroups with these conditions.

Keywords:
attention-deficit/hyperactivity disorderautismcomorbiditygenetic correlationheterogeneitymajor depressionobsessive-compulsive disorderpolygenic risk score

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Area of Science:

  • Psychiatric Genetics
  • Neuroscience
  • Genomics

Background:

  • Obsessive-compulsive disorder (OCD) frequently co-occurs with other psychiatric disorders, with high heritability observed in both OCD and its comorbidities.
  • Understanding the genetic underpinnings of these co-occurring conditions is crucial for elucidating OCD's complex etiology.
  • Previous research has not fully explored the genetic heterogeneity of OCD in relation to its common comorbidities.

Purpose of the Study:

  • To investigate the genetic relationship between OCD and its common comorbidities: major depressive disorder (MDD), attention-deficit hyperactivity disorder (ADHD), and autism spectrum disorder (ASD).
  • To examine genetic correlation patterns and polygenic risk score (PRS) associations across different OCD comorbid subgroups.

Main Methods:

  • Utilized publicly available genome-wide association study (GWAS) summary statistics to compare genetic correlations between OCD, MDD, ADHD, ASD, and 861 other health phenotypes.
  • Employed independent patient data from the Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSYCH) to analyze how PRS of specific traits partitioned across OCD subgroups (OCD only, OCD+MDD, OCD+ADHD, OCD+ASD, OCD+multiple comorbidities).

Main Results:

  • Polygenic risk scores (PRS) for most traits, excluding Body Mass Index (BMI), were significantly associated with OCD across all patient subgroups.
  • PRS estimates for age at first birth, educational attainment, and insomnia showed significant differences across comorbid OCD subgroups.
  • Genetic correlation patterns observed between OCD, MDD, ADHD, and ASD were mirrored in PRS associations within the respective comorbid OCD groups, particularly for anorexia nervosa, age at first birth, educational attainment, insomnia, and neuroticism.

Conclusions:

  • The study identified both quantitative and qualitative polygenic heterogeneity across OCD comorbid subgroups.
  • These findings suggest distinct genetic architectures underlying OCD when comorbid with MDD, ADHD, or ASD.
  • Further research into the genetic basis of OCD comorbidities can inform targeted treatment strategies and improve understanding of psychiatric disorder development.