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Sex Differences in Metabolic Cardiomyopathy

Elizabeth Murphy, Georgios Amanakis, Natasha Fillmore

    Cardiovascular Research
    |February 4, 2017
    PubMed

    Insights

    Diabetic cardiomyopathies disproportionately affect women. This review explores sex-based differences in metabolism, calcium handling, and nitric oxide signaling pathways contributing to this disparity in heart disease.

    Area of Science:

    • Cardiology
    • Endocrinology
    • Metabolic Disorders

    Background:

    • Diabetic cardiomyopathies are more prevalent in women than men, unlike ischemic cardiomyopathies.
    • Diabetes increases cardiovascular disease risk, with a notable sexual dimorphism: heart disease is 5x more common in diabetic women vs. 2x in diabetic men.
    • Heart failure with preserved ejection fraction, linked to metabolic syndrome, is also more common in women.

    Purpose of the Study:

    • To review potential mechanisms underlying sex differences in metabolic cardiomyopathies.
    • To evaluate sex differences in metabolism, calcium handling, nitric oxide, and structural proteins.
    • To focus on signaling pathways, specifically nitric oxide synthase and PPARα, in regulating these sex differences.

    Main Methods:

    • Literature review of studies investigating sex differences in metabolic cardiomyopathies.
    • Evaluation of sex-specific alterations in cardiac metabolism.
    • Assessment of sex-based differences in calcium handling and nitric oxide pathways.

    Main Results:

    • Women exhibit distinct metabolic profiles and calcium handling in the context of diabetes.
    • Nitric oxide synthase and PPARα signaling pathways show sex-dependent regulation.
    • These pathways are implicated in the development of cardiac hypertrophy and heart failure in a sex-specific manner.

    Conclusions:

    • Sex differences in metabolism, calcium handling, and nitric oxide signaling contribute to the higher prevalence of diabetic cardiomyopathies in women.
    • Targeting sex-specific pathways like nitric oxide synthase and PPARα may offer novel therapeutic strategies for diabetic heart disease.
    • Understanding these sex differences is crucial for developing effective, personalized treatments for metabolic cardiomyopathies.

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