Cited by 165Cardiovascular and exercise physiologyMuscle Physiology and DisordersMitochondrial Function and Pathology

Heart failure with preserved ejection fraction induces molecular, mitochondrial, histological, and functional alterations in rat respiratory and limb skeletal muscle

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Bowen, T. Scott, Rolim, Natale P. L., Fischer, Tina, Bækkerud, Fredrik H., Medeiros, Alessandra, Werner, Sarah, Brønstad, Eivind, Rognmo, Oivind +6 more·2015·European Journal of Heart Failure

Abstract

Aims: Peripheral muscle dysfunction is a key mechanism contributing to exercise intolerance (i.e. breathlessness and fatigue) in heart failure patients with preserved ejection fraction (HFpEF); however, the underlying molecular and cellular mechanisms remain unknown. We therefore used an animal model to elucidate potential molecular, mitochondrial, histological, and functional alterations induced by HFpEF in the diaphragm and soleus, while also determining the possible benefits associated with exercise training. Methods and results: Female Dahl salt-sensitive rats were fed a low (CON; n = 10) or high salt (HFpEF; n = 11) diet of 0.3% or 8% NaCl, respectively, or a high salt diet in combination with treadmill exercise training (n = 11). Compared with low-salt rats, high-salt rats developed (P < 0.05) HFpEF. Compared with CON, the diaphragm of HFpEF rats demonstrated (P < 0.05): a fibre type shift from fast-to-slow twitch; fibre atrophy; a decreased pro-oxidative but increased anti-oxidant capacity; reduced proteasome activation; impaired in situ mitochondrial respiration; and in vitro muscle weakness and increased fatigability. The soleus also demonstrated numerous alterations (P < 0.05), including fibre atrophy, decreased anti-oxidant capacity, reduced mitochondrial density, and increased fatigability. Exercise training, however, prevented mitochondrial and functional impairments in both the diaphragm and soleus (P < 0.05). Conclusion: Our findings are the first to demonstrate that HFpEF induces significant molecular, mitochondrial, histological, and functional alterations in the diaphragm and soleus, which were attenuated by exercise training. These data therefore reveal novel mechanisms and potential therapeutic treatments of exercise intolerance in HFpEF.

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  • In rats with heart failure, pro-oxidants such as NADPH oxidase and XO activity were higher, and antioxidants, such as catalase and superoxide dismutase (SOD), were lower than in corresponding controls.

    “In rats with heart failure, pro-oxidants such as NADPH oxidase and XO activity were higher, and antioxidants, such as catalase and superoxide dismutase (SOD), were lower than in corresponding controls [124].”

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Authors
Bowen, T. S., Rolim, N. P. L., Fischer, T., Bækkerud, F. H., Medeiros, A., Werner, S., Brønstad, E., Rognmo, O., Mangner, N., Linke, A., Schuler, G., Silva, G. J. J., Wisløff, U., & Adams, V.
Affiliations
  • Leipzig Heart Institute (DE)
  • Norwegian University of Science and Technology (NO)
  • Universidade Federal de São Paulo (BR)
  • K.G. Jebsen Centre of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology , Trondheim ,
Corresponding author
  • Bowen, T. Scott
  • Rolim, Natale P. L.
Venue
European Journal of Heart Failure
Published
2015-02-06
Volume
17
Issue
3
Pages
263-272
ISSN
  • 1388-9842 (ISSN-L)
  • 1879-0844
OpenAlex
W1516799253
Cited by
165
References
31
Citations by year
2026: 11 · 2025: 16 · 2024: 12 · 2023: 12 · 2022: 13 · 2021: 12 · 2020: 18 · 2019: 17 · 2018: 10 · 2017: 19 · 2016: 16 · 2015: 8
FWCI
34.74
Type
journal article
Language
en
Open access
Locations
  • European Journal of Heart Failure (publishedVersion)
  • PubMed (publishedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
  • Americanae (AECID Library) (submittedVersion)
Funders
  • European Commission (EU 602405- 2)
  • Alexander von Humboldt-Stiftung
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
heart failure with preserved ejection fraction, exercise intolerance, diaphragm, soleus muscle, skeletal muscle, high-salt diet, Dahl salt-sensitive rats, exercise training, mitochondrial dysfunction, oxidative stress, muscle fatigue, proteasome activation, mitochondrial respiration
MeSH terms
Animals, Catalase, Diaphragm, Female, Heart Failure, Mitochondria, Muscle, Stroke Volume, Superoxide Dismutase, Exercise Tolerance, Oxidative Stress, Muscle, Skeletal, Myosin Light Chains, Troponin C, NADPH Oxidases, Rats, Inbred Dahl, Models, Animal, Rats

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