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Related Concept Videos

Schizophrenia01:17

Schizophrenia

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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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Biological Causes of Schizophrenia01:29

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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
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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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Related Experiment Video

Updated: Jan 20, 2026

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Brain-derived neurotrophic factor and schizophrenia.

Pasquale Di Carlo1, Giovanna Punzi, Gianluca Ursini

  • 1Group of Psychiatric Neuroscience, Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy Lieber Institute for Brain Development, Johns Hopkins Medical Campus Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland, USA.

Psychiatric Genetics
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Summary

Brain-derived neurotrophic factor (BDNF) plays a key role in brain development and function. Genetic variations in BDNF, particularly rs6265, are linked to schizophrenia phenotypes, but large studies show weak genetic association.

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Area of Science:

  • Neuroscience
  • Psychiatric Genetics
  • Molecular Biology

Background:

  • Brain-derived neurotrophic factor (BDNF) is crucial for neuronal development, survival, and synaptic plasticity.
  • BDNF regulation is vital for optimal brain function, and its disruption is linked to neurodevelopmental and synaptic alterations.
  • The BDNF gene, including the rs6265 variant (Val66Met), has been investigated for its role in schizophrenia.

Purpose of the Study:

  • To review the relationship between BDNF genetic variation and schizophrenia.
  • To bridge the gap between genetic risk and molecular insights into BDNF's role in schizophrenia.
  • To explore how understanding BDNF biology and epigenetics can inform schizophrenia prevention and treatment.

Main Methods:

  • Review of human and animal studies on BDNF and schizophrenia-related phenotypes.
  • Analysis of genetic association studies, including genome-wide association studies (GWAS).
  • Examination of molecular mechanisms, including BDNF secretion, signaling, and epigenetic regulation.

Main Results:

  • Human and animal studies suggest BDNF is relevant to schizophrenia phenotypes.
  • The Val66Met substitution in BDNF is associated with impaired activity-dependent secretion.
  • While GWAS have not strongly associated the BDNF locus with schizophrenia, sub-threshold associations exist.

Conclusions:

  • Fine-tuned BDNF regulation is essential for brain development and function.
  • Disruption of BDNF signaling contributes to altered synaptic plasticity and neurodevelopment, relevant to schizophrenia.
  • Further research into BDNF biology and epigenetic regulation may clarify its role in schizophrenia and guide therapeutic strategies.