Three TF Co-expression Modules Regulate Pressure-Overload Cardiac Hypertrophy in Male Mice

Area of Science:

• Cardiovascular Biology
• Molecular Biology
• Genomics

Background:

• Pathological cardiac hypertrophy is a key risk factor for heart failure.
• The dynamic regulation of genes by transcription factors (TFs) during hypertrophy is not fully understood.

Purpose of the Study:

• To investigate the dynamic roles of TFs in regulating gene expression during cardiac hypertrophy.
• To identify key TFs and regulatory networks involved in cardiac remodeling.

Main Methods:

• Collected time-course transcriptomes from male murine hearts after transverse aorta banding.
• Performed computational analyses to identify TF co-expression modules and construct regulatory networks.

Main Results:

• Identified three TF gene co-expression modules regulating cardiac hypertrophy.
• Module 1 TFs were upregulated early, followed by Modules 2 and 3 as heart size increased.
• Early TFs initiated cascading regulation, with cardiac microRNAs upregulated later for suppression.

Conclusions:

• TF gene modules exhibit dynamic regulation during cardiac hypertrophy development.
• Egr2 is identified as a potential key regulator of cardiovascular genes.
• Understanding these TF dynamics offers insights into heart failure pathogenesis.