| Title: | Sex-specific cardiac ageing and sympathetic compensation: a translational study |
| Journal: | European Heart Journal |
| Published: | 10 Dec 2025 |
| Pubmed: | https://pubmed.ncbi.nlm.nih.gov/41367061/ |
| DOI: | https://doi.org/10.1093/eurheartj/ehaf922 |
Publication 17155
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Abstract
BACKGROUND AND AIMS: Recent evidence suggests that individuals with smaller left ventricular (LV) volumes and high LV ejection fraction face an increased risk of cardiovascular morbidity and mortality. Age-related cardiac changes may particularly predispose women to these risk conditions.</p>
METHODS: LV morphometry was analysed by cardiac magnetic resonance imaging in 39 616 individuals (aged 45-85 years, 52.2% women) from the UK Biobank using an observational cross-sectional study design. Additional analyses were conducted in a mouse model of hormone withdrawal and ageing (118 mice aged 4-6 [young cohort] or 18-20 [aged cohort] months, 50% females) as well as in a 3D human microtissue (hMT) model assessing the cellular effects of sex hormones.</p>
RESULTS: Both women and men exhibited age-related reduction of LV volumes, with women showing a significantly stronger decline than men (indexed LV end-diastolic volume [LVEDVI]: r = -0.272, P = .037 vs men). A compensatory increase in baseline heart rate (HR) was more pronounced in women (r = 0.121, P < .001 vs men) resulting in a lesser age-related decline in cardiac indices in women than in men (r = -0.169 in women vs r = -0.211 in men, P = .045 vs men). In mice, sex differences in cardiac ageing were more pronounced than in humans, with age-related reductions in LV volumes alongside an increase in collagen I production (0.743 ± 0.364 vs 1.611 ± 0.372 arbitrary units [AU], P = .002 and 1.925 ± 0.27 vs 1.838 ± 0.329 AU, P = .0972 for young vs old in males), being significant only in females (LVEDVI: P < .001 for young vs old females). Withdrawal of sex hormones in mice eliminated age-related changes in LV volumes. Compensatory mechanisms accounting for smaller LV volumes, including an age-related increase in HR (377 ± 45 vs 438 ± 40 bpm, P = .012 for young vs old females) and cardiac sympathetic activity (0.206 ± 0.02 vs 0.148 ± 0.03% injected dose per mL, P = .008 for young vs old females), were significant only in female mice. In a 3D hMT model, both female and male sex hormones exerted anti-fibrotic and anti-apoptotic effects on cardiomyocytes and fibroblasts. A decline in female sex hormone production with age was observed in both species, while testosterone levels remained essentially unchanged over the lifespan.</p>
CONCLUSIONS: Age-related cardiac changes affect both women and men in similar ways, but are more pronounced in women-likely reflecting a greater decline in sex hormones. This is associated with more prominent compensatory mechanisms to offset their disadvantage of having a smaller heart. Animal and tissue models support these findings by revealing hormone- and sex-specific effects on cardiac structure and sympathetic regulation.</p>
33 Authors
- Achi Haider
- Susan Bengs
- Angela Portmann
- Pimrapat Gebert
- Alexia Rossi
- Nidaa Mikail
- Dominik Etter
- Sandro Fröhlich
- Monika Maredziak
- Geoffrey I Warnock
- Muriel Grämer
- Alexander Akhmedov
- Caroline E Gebhard
- Alexander Meisel
- Sebastian Kozerke
- Grzegorz Kwiatkowski
- Uta Ceglarek
- Madlen Reinicke
- Ronald Biemann
- Alexander Gaudl
- Claudia Keller
- Adrienne Müller Herde
- Bruno Weber
- Linjing Mu
- Christoph Gräni
- Ronny R Buechel
- Vera Regitz-Zagrosek
- Simon M Ametamey
- Giuseppe Vassalli
- Giovanni G Camici
- Philipp A Kaufmann
- Carolina Balbi
- Catherine Gebhard
1 Application
| Application ID | Title |
|---|---|
| 77225 | Diabetes, myocardial fibrosis, and cardiovascular diseases |
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