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Related Concept Videos

Epigenetic Regulation01:46

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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Sex-specific DNA methylation differences in Amyotrophic lateral sclerosis.

Olivia A Grant, Alfredo Iacoangeli, Ramona A J Zwamborn

    Biorxiv : the Preprint Server for Biology
    |December 9, 2024
    PubMed
    Summary
    This summary is machine-generated.

    This study identified 226 sex-associated DNA methylation sites in the blood of individuals with Amyotrophic Lateral Sclerosis (ALS). These sites offer insights into ALS risk, progression, and survival, highlighting the role of sex in this motor neuron disease.

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    Area of Science:

    • Genetics and Epigenetics
    • Neuroscience
    • Human Disease Research

    Background:

    • Sex is a critical factor influencing disease incidence, progression, and outcomes.
    • Amyotrophic Lateral Sclerosis (ALS) exhibits a higher incidence in males, suggesting a role for sex-based biological differences.

    Purpose of the Study:

    • To conduct a large-scale, blood-based epigenome-wide association study meta-analysis to identify sex-associated DNA methylation patterns in ALS.
    • To characterize the genomic locations and regulatory potential of these sex-associated differentially methylated positions (saDMPs).
    • To investigate the association between identified saDMPs and overall survival in ALS patients.

    Main Methods:

    • Performed an epigenome-wide association study meta-analysis on DNA methylation data from 9274 individuals (5529 males, 3975 females).
    • Utilized stringent quality control measures for data analysis.
    • Applied Cox proportional hazards models to assess the relationship between DNA methylation and ALS survival.

    Main Results:

    • Identified 226 ALS-specific sex-associated differentially methylated positions (saDMPs) linked to 159 unique genes.
    • Found ALS saDMPs are enriched at enhancers and 3'UTRs, and associated with transcription factors like ESR1 and REST.
    • Discovered two saDMPs (cg14380013, cg06729676) significantly associated with ALS patient survival.
    • Identified 10 additional genes potentially regulated by ALS saDMPs through chromatin loop interactions.

    Conclusions:

    • This study provides a comprehensive catalogue of sex-associated DNA methylation sites in ALS.
    • The findings elucidate the characteristics and potential regulatory roles of these saDMPs in ALS.
    • This resource is valuable for future research into the influence of sex on ALS incidence, progression, and risk.