Mitochondria, Sex, and Cardiovascular Disease: A Complex Interplay

Area of Science:

• Cardiovascular Science
• Mitochondrial Biology
• Endocrinology

Background:

• Cardiovascular diseases (CVDs) are a leading global cause of death.
• Sex differences significantly affect CVD development, progression, and outcomes.
• Mitochondria play crucial roles in cellular energy and regulation of oxidative stress, inflammation, and apoptosis.

Purpose of the Study:

• To explore sexual dimorphism in cardiovascular disease.
• To focus on the interplay between mitochondrial function and sex hormones in cardiovascular tissues.
• To summarize mechanisms contributing to sex-based disparities in cardiovascular outcomes.

Main Methods:

• Review of current evidence on molecular, hormonal, and cellular mechanisms.
• Analysis of preclinical studies on mitochondrial function and sex hormones.
• Investigation of sex-specific mitochondrial signaling under cardiac stress.

Main Results:

• Female cardiac mitochondria may possess greater antioxidant capacity and produce fewer reactive oxygen species than male mitochondria.
• Estrogen influences mitochondrial bioenergetics, gene expression, vascular tone, inflammation, and cardiac remodeling.
• Testosterone's role in cardiovascular mitochondrial function is less defined.
• Sex-specific mitochondrial signaling responses occur under cardiac stress.

Conclusions:

• Understanding sex-modulated mitochondrial function can improve CVD risk stratification.
• Insights may lead to personalized prevention and treatment strategies for cardiovascular diseases.
• Further research is needed to translate findings into clinical practice.