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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.
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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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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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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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Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
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Genome-Transcriptome-Functional Connectivity-Cognition Link Differentiates Schizophrenia From Bipolar Disorder.

Jiayu Chen1, Zening Fu1, Juan R Bustillo2,3

  • 1Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, and Emory University, Atlanta, GA, USA.

Schizophrenia Bulletin
|August 21, 2022
PubMed
Summary
This summary is machine-generated.

Genetic risk for schizophrenia (SZ) influences brain connectivity and cognition, differing from bipolar disorder (BD). This pathway links SZ-biased genes to frontoparietal dysconnectivity and cognitive deficits, aiding patient stratification.

Keywords:
SNPfunctional connectivitygene expressionpolygenic risk scoreworking memory

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Background:

  • Schizophrenia (SZ) and bipolar disorder (BD) share genetic risks but exhibit distinct cognitive impairments.
  • A hypothesized pathway links genetic risk, gene expression, frontoparietal functional connectivity (FC), and cognition.
  • This study investigates the genome-transcriptome-FC-cognition pathway to explain SZ-versus-BD differences.

Purpose of the Study:

  • To delineate the genome-transcriptome-frontoparietal functional connectivity-cognition pathway underlying differences between SZ and BD.
  • To examine the association of SZ-biased genetic risk with frontoparietal FC and cognitive performance.
  • To explore SZ-versus-BD differences in frontoparietal FC and its relation to cognition.

Main Methods:

  • Calculated polygenic risk score for SZ (PRSSZ) from SZ-biased single nucleotide polymorphisms (SNPs).
  • Assessed associations between PRSSZ, SZ-biased gene expression, frontoparietal FC, and cognitive performance.
  • Compared frontoparietal FC in SZ and BD patients versus controls, and correlated FC with cognitive domains.

Main Results:

  • PRSSZ was significantly associated with frontoparietal FC and working memory.
  • SZ-biased gene expression correlated with SZ-versus-BD differences in frontoparietal FC.
  • SZ patients exhibited greater frontoparietal FC reductions than BD patients; FC linked to cognitive performance across domains.

Conclusions:

  • Findings support a pathway where SZ-biased genetic risk impacts frontoparietal dysconnectivity, leading to differential cognitive deficits in SZ versus BD.
  • This pathway highlights potential biomarkers for precise patient stratification and treatment development in psychiatric disorders.
  • The study provides a multiscale perspective on the neurobiological underpinnings of cognitive differences in SZ and BD.