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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
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Comparing Copy Number Variations and SNPs02:26

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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
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Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

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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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Complement System01:27

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The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
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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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Genome-wide Association Studies-GWAS01:11

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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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Peripheral Complement C4 Protein in Schizophrenia: Association with Gene Copy Number and Immune Cell Subtypes.

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    Schizophrenia research reveals C4 protein is primarily in neutrophils and monocytes. A correlation between C4A gene copies and C4 protein exists in neutrophils of schizophrenia patients, suggesting a novel innate immunity target.

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    Area of Science:

    • Neuroscience
    • Immunology
    • Genetics

    Background:

    • Schizophrenia lacks disease-modifying treatments, necessitating exploration of its pathophysiology.
    • Innate immune mechanisms, particularly complement cascade protein C4, are implicated in schizophrenia symptoms and outcomes.
    • Unexpected C4 protein activation patterns suggest alternative activation sources beyond the classical complement cascade.

    Purpose of the Study:

    • To investigate the cellular source and expression of C4 protein in schizophrenia.
    • To examine the correlation between C4A gene copy number and C4 protein levels in neutrophils, monocytes, and plasma.
    • To identify novel innate immunity mechanisms potentially relevant to schizophrenia pathophysiology.

    Main Methods:

    • Analysis of fresh whole blood from donors and public microarray data.
    • Digital droplet PCR to quantify C4A gene copy number.
    • Western blotting for C4 protein in neutrophils and plasma.
    • Flow cytometry for C4 protein in classical monocytes.

    Main Results:

    • C4 protein is primarily expressed in neutrophils and monocytes.
    • A moderate positive correlation (r = 0.64, p = 0.01) was found between C4A gene copy number and C4 protein levels exclusively in neutrophils of the schizophrenia group.
    • No significant correlation was observed in controls or in plasma/monocytes.

    Conclusions:

    • Results indicate a novel innate immunity mechanism involving C4 protein in neutrophils associated with schizophrenia.
    • This finding highlights a potential convergence of innate immunity pathways in schizophrenia.
    • The identified mechanism warrants further investigation as a potential therapeutic target for schizophrenia.