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Integrated Methylome-Transcriptome Analysis Reveals Epigenomic Remodeling and Rho GTPase-Linked Immune-Epithelial

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Epigenomic changes in atopic dermatitis (AD) skin, including DNA methylation, are crucial. This study integrates multi-omics data to reveal Rho GTPase signaling as a key regulator in AD pathogenesis.

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Area of Science:

  • Genomics and Epigenomics
  • Dermatology
  • Microbiome Research

Background:

  • Atopic dermatitis (AD) is a chronic inflammatory skin condition with known immune and barrier dysfunction.
  • While gene expression changes are studied, DNA methylation patterns in AD are less understood.

Purpose of the Study:

  • To investigate DNA methylation patterns in atopic dermatitis skin.
  • To integrate epigenomic data with transcriptomic and microbiomic data.
  • To identify key molecular pathways involved in AD pathogenesis.

Main Methods:

  • Integrated analysis of DNA methylomes, transcriptomes, and microbiomes from lesional, non-lesional, and healthy skin.
  • Utilized cell-type-adjusted models for comprehensive analysis.
  • Employed transcriptomic co-expression networks and pathway analyses.

Main Results:

  • Identified thousands of differentially methylated regions (DMRs) between lesional, non-lesional, and healthy skin.
  • Linked DMRs to immune-epithelial gene expression modules, with significant anti-correlations.
  • Found distinct methylation patterns associated with Staphylococcus aureus colonization and disease severity.
  • Highlighted Rho GTPase and actin-junctional pathways as central integrators of AD pathology.

Conclusions:

  • Epigenomic remodeling, particularly DNA methylation, plays a significant role in atopic dermatitis.
  • Rho GTPase signaling emerges as a critical pathway integrating immune, epithelial, and microbial factors in AD.
  • Findings suggest potential targets for precision interventions in chronic inflammatory skin diseases.