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Related Concept Videos

Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

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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...
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Psychological and Sociocultural Causes of Schizophrenia01:29

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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...
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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.
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Schizophrenia01:17

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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...
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Human Genetics01:28

Human Genetics

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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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Related Experiment Video

Updated: Jul 13, 2025

Derivation, Expansion, Cryopreservation and Characterization of Brain Microvascular Endothelial Cells from Human Induced Pluripotent Stem Cells
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Clustering Schizophrenia Genes by Their Temporal Expression Patterns Aids Functional Interpretation.

Dennis van der Meer1,2, Weiqiu Cheng1, Jaroslav Rokicki1,3

  • 1Division of Mental Health and Addiction, Norwegian Centre for Mental Disorders Research (NORMENT), Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.

Schizophrenia Bulletin
|October 12, 2023
PubMed
Summary
This summary is machine-generated.

Schizophrenia development involves distinct prenatal and postnatal gene expression patterns. Genetic risk during prenatal development interacts with postnatal risk, influencing schizophrenia diagnosis.

Keywords:
2-hit hypothesiscortical tissuegene expressionneurodevelopmentpolygenic risk scoreschizophrenia

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Biology

Background:

  • Schizophrenia is a highly heritable brain disorder with onset in early adulthood.
  • The '2-hit' hypothesis suggests early neurodevelopmental predisposition followed by later maturational disruption triggers symptoms.

Purpose of the Study:

  • To investigate the role of distinct gene expression patterns across neurodevelopment in schizophrenia.
  • To explore the interaction of polygenic risk scores from different developmental stages in schizophrenia etiology.

Main Methods:

  • Hierarchical clustering of 345 schizophrenia-associated genes from cortical tissue across the lifespan.
  • Calculation of clustered-specific polygenic risk scores in individuals with schizophrenia and controls.
  • Replication in an independent clinical cohort.

Main Results:

  • Identified two gene sets: one upregulated prenatally (cell cycle) and one upregulated postnatally (immune/neuronal communication).
  • Found a significant interaction: higher prenatal polygenic risk amplified the association with schizophrenia at higher postnatal polygenic risk levels.
  • Replicated findings in an independent cohort of 3233 individuals.

Conclusions:

  • Schizophrenia is influenced by disruptions in distinct biological processes during specific neurodevelopmental phases.
  • Modeling gene-environment interactions, informed by developmental timing, enhances understanding of schizophrenia development.