ArticleBiology of sex differences2025
Age- and sex-specific differences in myocardial sympathetic tone and left ventricular remodeling following myocardial injury.
Article in Biology of sex differences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- In vitro sex-specific function-structure relationship in neonatal rat cardiac monolayers.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Acute myocardial infarction induces sex-specific, time-dependent remodeling of the gut microbiome and intestinal immune compartment in retired breeder C57BL/6N mice.Frontiers in microbiomes · 2026Article
- Sleep fragmentation exacerbates myocardial ischemia-reperfusion injury via hypothalamic paraventricular nucleus-resident OX1R-mediated sympathetic hyperactivity in adult mice.Annals of medicine · 2025Article
- Sertraline exposure during development may impact post-myocardial infarction survival in adult mice.Physiological reports · 2025Article
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Authors and funding
19 authors.
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Abstract
backgroundPresentations and outcomes of acute myocardial infarction (MI) differ between women and men, with the worst outcomes being reported in younger women. Mental stress induced ischemia and sympathetic activation have been suggested to play a prominent role in the pathogenesis of MI in younger women, however, the impact of sex hormones on these parameters remains unknown.
methodsThe effect of sex hormones and age on myocardial infarct size and myocardial sympathetic activity (MSA) was assessed in male and female, as well as young (4-6 months) and aged (20-22 months) FVB/N mice (n = 106, 60 gonadectomized and 46 sham-operated animals) who underwent in vivo [
resultsMSA and catecholamine levels following myocardial injury were highest in young males (p = 0.008 and p = 0.043 vs. young females, respectively) and were reduced by orchiectomy. Accordingly, testosterone serum levels correlated positively with MSA (r = 0.66, p < 0.001). Males had a larger average infarct size and lower left ventricular contractility following myocardial injury than females (p < 0.05 vs. females). These sex differences were no longer evident in gonadectomized animals (p = NS vs. females). In female animals, estrogen depletion did not affect MSA (ovariectomy effect, p = 0.892). Female animals showed an age-dependent increase in MSA (p = 0.011), which was absent in males.
conclusionTestosterone associates with an increase in sympathetic tone, contributing to adverse cardiac remodeling following MI. Conversely, females maintain sympathetic integrity, independent of sex hormones. Our results suggest a biological advantage of female sex in post MI recovery. Further research is warranted to confirm these findings in humans.
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