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Transverse Aortic Constriction in Mice

Transverse Aortic Constriction in Mice

Published on: April 21, 2010

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

Yao-Ming Chang¹, Li Ling², Ya-Ting Chang²

¹Biodiversity Research Center, Academia Sinica, Taipei, Taiwan.

Scientific Reports

|August 10, 2017

Summary

This study reveals how transcription factors (TFs) dynamically regulate gene expression during pathological cardiac hypertrophy in mice. Early-stage TFs initiate changes, with later TFs and microRNAs controlling heart remodeling and potential heart failure development.

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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.