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Related Concept Videos

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

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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.
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...
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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, 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

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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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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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Schizophrenia genomics: genetic complexity and functional insights.

Patrick F Sullivan1,2,3, Shuyang Yao4, Jens Hjerling-Leffler5

  • 1Department of Genetics, University of North Carolina, Chapel Hill, NC, USA. pfsulliv@med.unc.edu.

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Schizophrenia genetics research reveals hundreds of common and rare variants contributing to risk. These findings highlight complex polygenic mechanisms rather than single-gene causes for this brain disorder.

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Background:

  • Schizophrenia etiology remains a complex and long-standing challenge.
  • Genomic studies have identified numerous genetic risk factors over decades.

Purpose of the Study:

  • To review current knowledge on schizophrenia genetics.
  • To explore the neurobiological implications of these genetic findings.

Main Methods:

  • Genome-wide association studies (GWAS) for common variants.
  • Whole-exome sequencing and copy number variant (CNV) studies for rare variants.
  • Integration of genetic data with neurobiological and functional genomic studies.

Main Results:

  • Hundreds of common genetic variants (e.g., from GWAS) implicate polygenicity.
  • Over 20 rare variants identified through whole-exome and CNV studies.
  • Neurobiological studies provide insights into brain structure and function in schizophrenia.

Conclusions:

  • Schizophrenia arises from complex interactions among numerous genes (polygenicity).
  • Genetic findings underscore the intricate biological basis of schizophrenia.
  • Further research integrating genetics and neurobiology is crucial.