High-resolution transcriptomic and epigenetic profiling identifies novel regulators of COPD

Area of Science:

• Pulmonary Medicine
• Epigenetics
• Genomics

Background:

• Chronic obstructive pulmonary disease (COPD) lacks curative treatments, despite its environmental origins.
• Altered epigenetic signaling in lung cells is hypothesized to play a role in COPD pathogenesis.

Purpose of the Study:

• To investigate genome-wide DNA methylation patterns in human lung fibroblasts (HLFs) across different stages of COPD.
• To identify novel transcriptomic and epigenetic signatures associated with COPD onset and progression.
• To discover candidate regulators involved in COPD pathogenesis.

Main Methods:

• Generation of genome-wide DNA methylation maps at single CpG resolution in primary HLFs from COPD patients.
• RNA sequencing of matched HLFs to analyze gene expression.
• Data integration and phenotypic screening to identify disease-related regulators.

Main Results:

• Significant changes in the epigenetic landscape, particularly DNA methylation in regulatory regions, were observed early in COPD.
• Dysregulation of genes involved in proliferation, DNA repair, and extracellular matrix organization was identified.
• 110 candidate regulators linked to fibroblast repair processes were identified, including epigenetic factors.

Conclusions:

• The study provides high-resolution multi-omic maps of HLFs in COPD, revealing novel epigenetic and transcriptomic signatures.
• Epigenetic dysregulation is implicated in COPD pathogenesis, offering potential for new therapeutic strategies.
• Identified candidate regulators may serve as targets for novel treatments for chronic lung diseases.