Cardiac proteostasis in obesity and cardiovascular disease

Area of Science:

• Cardiovascular Science
• Molecular Biology
• Metabolic Health

Background:

• Cardiovascular diseases (CVD) are strongly linked to disruptions in protein homeostasis (proteostasis).
• Obesity is a major risk factor for heart disease, contributing to systemic insulin resistance and cardiovascular dysfunction through dysfunctional adipose tissue.
• Chronic inflammation and lipotoxicity in obesity impair endoplasmic reticulum (ER) function, overwhelming cellular protein quality control mechanisms.

Purpose of the Study:

• To explore the intricate relationship between proteostasis and cardiovascular dysfunction, particularly in the context of obesity.
• To identify potential therapeutic strategies targeting protein quality control pathways for improving cardiac health.

Main Methods:

• Review of existing literature on proteostasis, obesity, and cardiovascular disease.
• Analysis of the roles of the ubiquitin-proteasome system (UPS) and autophagy in cardiomyocyte function.
• Examination of the impact of ER stress and lipotoxicity on protein quality control.

Main Results:

• Impairment of proteostasis, including UPS and autophagy dysfunction, is closely associated with cardiomyocyte dysfunction.
• Obesity-induced inflammation and lipotoxicity compromise ER function and protein quality control capacity.
• Dysfunctional adipose tissue releases cytokines that exacerbate insulin resistance and cardiovascular issues.

Conclusions:

• Targeting UPS and autophagy pathways presents promising therapeutic avenues for restoring protein homeostasis and enhancing cardiac function.
• Lifestyle modifications like diet and exercise can promote cardiac proteostasis and metabolic health.
• Further research into proteostasis and protein quality control is crucial for addressing obesity-related cardiac dysfunction.