Effect of HDAC4 Regulation of β-Catenin Signaling Pathway on Cardiac Injury in Spontaneously Hypertensive Rats and...

Area of Science:

• Cardiovascular Biology
• Molecular Medicine
• Hypertension Research

Background:

• Histone deacetylase 4 (HDAC4) is upregulated in essential hypertension patients, correlating with myocardial injury.
• Understanding HDAC4's role is crucial for developing treatments for hypertensive heart disease.

Purpose of the Study:

• To investigate the effects and underlying mechanisms of HDAC4 in cardiac injury within spontaneously hypertensive rats (SHR).
• To identify potential diagnostic and therapeutic strategies for hypertensive myocardial disease.

Main Methods:

• Comparison of physiological and molecular markers between spontaneously hypertensive rats (SHR) and WKY control rats.
• Intervention by interfering with HDAC4 expression (inhibition and overexpression) in SHR.
• Assessment of cardiac injury markers, apoptosis rates, inflammatory cytokines, oxidative stress, and key protein levels (e.g., β-catenin, Wnt3a).

Main Results:

• SHR group exhibited significantly increased blood pressure, myocardial injury markers, apoptosis, inflammatory cytokines (TNF-α, IL-6, IL-1β), oxidative stress (MDA), and HDAC4/β-catenin pathway proteins compared to WKY.
• Interfering with HDAC4 expression in SHR reduced cardiomyocyte apoptosis, inflammatory markers, MDA, and β-catenin pathway proteins, while improving cardiac function (LVEF) and antioxidant levels (SOD).
• Overexpression of HDAC4 exacerbated cardiac injury in SHR.

Conclusions:

• HDAC4 plays a significant role in promoting cardiac injury in spontaneously hypertensive rats.
• HDAC4 appears to regulate cardiac injury in SHR rats, at least partly, through the β-catenin signaling pathway.
• Targeting HDAC4 presents a promising therapeutic avenue for managing hypertensive myocardial disease.