Single-Cell RNA Sequencing Reveals Cardiac Fibroblast-Specific Transcriptomic Changes in Dilated Cardiomyopathy

Area of Science:

• Cardiovascular Biology
• Genomics
• Molecular Medicine

Background:

• Dilated cardiomyopathy (DCM) is a leading cause of heart failure with intricate cellular origins.
• Understanding cell-specific molecular changes is crucial for deciphering DCM pathogenesis.

Purpose of the Study:

• To identify cell-specific transcriptomic alterations in human dilated cardiomyopathy using advanced single-cell analysis.
• To pinpoint key genes and cell populations involved in DCM development.

Main Methods:

• Applied single-cell RNA sequencing (scRNA-seq) to human DCM cardiac tissue.
• Utilized an updated bioinformatic workflow including unsupervised clustering and reference label transfer for cell annotation.
• Performed bulk RNA sequencing on an independent cohort for validation and identified fibroblast-specific gene candidates.

Main Results:

• Differential gene expression was predominantly observed in cardiac fibroblast populations.
• Validated concordant gene dysregulation in TGFβ-induced fibroblasts.
• Identified AEBP1 as a gene potentially significant in fibroblast activation.

Conclusions:

• Advanced scRNA-seq analysis provides high-resolution insights into cell-type-specific transcriptomic changes in DCM.
• Cardiac fibroblasts exhibit significant transcriptomic alterations in DCM.
• AEBP1 emerges as a potential therapeutic target for DCM intervention.