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Related Concept Videos

Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

Schizophrenia, a severe psychiatric disorder, arises from a complex interplay of biological factors, including genetic predisposition, structural brain abnormalities, neurotransmitter dysregulation, and developmental irregularities. These factors collectively contribute to the onset and progression of the disorder, which typically manifests in late adolescence or early adulthood.
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin studies.
Psychological and Sociocultural Causes of Schizophrenia01:29

Psychological and Sociocultural Causes of Schizophrenia

Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within the...
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...
Schizophrenia01:17

Schizophrenia

Schizophrenia, a term introduced by Swiss psychiatrist Eugen Bleuler in 1911, describes a severe psychological disorder marked by profound disruptions in attention, thought processes, language, emotion, and interpersonal relationships. The core feature of schizophrenia is psychosis — a state characterized by a fundamental detachment from reality. This disconnection manifests through distorted logic, impaired perception, and atypical behavior, severely affecting the lives of those diagnosed.
Epigenetic Regulation01:37

Epigenetic Regulation

Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...

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Related Experiment Video

Updated: May 23, 2026

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia
05:51

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Published on: June 15, 2011

Why schizophrenia genetics needs epigenetics: a review.

Nadja P Maric1, Dragan M Svrakic

  • 1Faculty of Medicine, University Belgrade, Serbia. nadjamaric@yahoo.com

Psychiatria Danubina
|March 27, 2012
PubMed
Summary
This summary is machine-generated.

Schizophrenia risk is influenced by common and rare genetic variants, alongside environmental factors. Epigenetics offers a framework to integrate these diverse factors for better understanding and treatment of schizophrenia.

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Background:

  • Schizophrenia (SZ) is highly heritable, with genetics accounting for ~80% of variance.
  • Both common single nucleotide polymorphisms (SNPs) and rare copy number variants (CNVs) contribute significantly to SZ risk.
  • Environmental factors interact with genetic predisposition, influencing disease development.

Purpose of the Study:

  • To review the theoretical background of epigenetic mechanisms in gene-environment (GxE) interactions in SZ.
  • To discuss epigenetic and neurodevelopmental features of SZ integrating diverse research data.
  • To propose an epigenetic model for SZ as a framework for etiological synthesis.

Main Methods:

  • Literature review integrating genetics, epigenetics, epidemiology, neuroscience, and clinical research.
  • Analysis of existing data on common SNPs and rare CNVs in SZ etiology.
  • Exploration of environmental risk factors and their interaction with genetic liability.

Main Results:

  • Common SNPs cumulatively explain ~30% of genetic risk; rare CNVs explain an additional ~30%.
  • Environmental factors, including prenatal (e.g., viruses, ethanol) and postnatal (e.g., stress, cannabis), interact with genetic liability.
  • Epigenetic misregulation and CNS injury are proposed mechanisms for environmental influences.

Conclusions:

  • An epigenetic model provides a unifying framework for understanding SZ etiology.
  • This model integrates diverse empirical data, offering a powerful etiological synthesis.
  • The epigenetic model holds promise for developing targeted prevention and treatment strategies for schizophrenia.