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[Genetics and psychiatry].

A Abdellaoui, K J H Verweij

    Tijdschrift Voor Psychiatrie
    |June 23, 2022
    PubMed
    Summary
    This summary is machine-generated.

    Genetic research confirms psychiatric disorders have heritable components. Large-scale studies reveal complex genetic influences and overlaps with traits like IQ, driving a revolution in understanding inherited risk.

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    Area of Science:

    • Psychiatric Genetics
    • Genomics
    • Behavioral Science

    Background:

    • Heritability of psychiatric disorders has been suspected for centuries and confirmed by twin/family studies.
    • Heritability estimates vary widely, from 30-40% for depression to 80% for schizophrenia.
    • Genome-wide association studies (GWASs) emerged in the 21st century for hypothesis-free DNA association discovery.

    Purpose of the Study:

    • To outline the evolution of genetic research within psychiatry.
    • To highlight key advancements and findings in psychiatric genetics.

    Main Methods:

    • Literature review of selected studies.
    • Overview of historical and modern genetic research methodologies in psychiatry.

    Main Results:

    • Increasingly large GWASs demonstrate that psychiatric disorder risk is polygenic, influenced by numerous small-effect genetic variants.
    • Genetic factors contribute significantly to variation in psychiatric disorders.
    • Substantial genetic overlap exists between different psychiatric disorders and also with positive traits like IQ and educational attainment.

    Conclusions:

    • The field of psychiatric genetics is undergoing rapid advancement due to increasing sample sizes in genetic studies.
    • The predictive power of DNA in psychiatry is growing, though understanding the complexity of inherited risk remains a challenge.