The denitrosylase SCoR2 controls cardioprotective metabolic reprogramming

Area of Science:

• Biochemistry
• Cardiovascular Biology
• Metabolic Regulation

Background:

• Acute myocardial infarction (MI) is a major cause of death with limited treatments.
• Nitric oxide (NO) is cardioprotective, but its therapeutic benefits are not fully replicated by current drugs.
• S-nitrosylation is a key NO signaling mechanism involving specific enzymes, including denitrosylases like SNO-CoA Reductase 2 (SCoR2).

Purpose of the Study:

• To investigate the function of SNO-CoA Reductase 2 (SCoR2) in the context of myocardial infarction.
• To determine if SCoR2 plays a role in regulating metabolic pathways in the heart.
• To explore SCoR2 as a potential therapeutic target for cardiovascular disease.

Main Methods:

• Utilized a mouse model of myocardial infarction (MI).
• Generated and analyzed mice lacking the SCoR2/AKR1A1 gene.
• Examined metabolic pathways, including ketolysis, antioxidant levels, and polyol homeostasis.
• Assessed SCoR2 expression and S-nitrosylation patterns in human cardiomyopathy samples.

Main Results:

• Mice lacking SCoR2 exhibited significant protection in an MI model.
• SCoR2 deletion reprogrammed key metabolic pathways: ketone body utilization, glycolysis, pentose phosphate shunt, and polyol metabolism.
• Reduced SCoR2 expression and altered S-nitrosylation signatures were observed in human cardiomyopathy, mirroring the mouse model.
• SCoR2 regulates metabolic effectors through S-nitrosylation.

Conclusions:

• SNO-CoA Reductase 2 (SCoR2) is a novel regulator in the injured myocardium.
• Deletion of SCoR2 confers protection against myocardial infarction by reprogramming metabolic pathways.
• SCoR2 represents a potential new drug target for treating heart attack and related cardiovascular diseases.