Abstract
Oxidative stress has been implicated in the etiology of skeletal muscle weakness following joint injury. We investigated longitudinal patient muscle samples following knee injury (anterior cruciate ligament tear). Following injury, transcriptomic analysis revealed downregulation of mitochondrial metabolism-related gene networks, which were supported by reduced mitochondrial respiratory flux rates. Additionally, enrichment of reactive oxygen species (ROS)-related pathways were upregulated in muscle following knee injury, and further investigation unveiled marked oxidative damage in a progressive manner following injury and surgical reconstruction. We then investigated whether antioxidant protection is effective in preventing muscle atrophy and weakness after knee injury in mice that overexpress Mn-superoxide dismutase (MnSOD+/−). MnSOD+/− mice showed attenuated oxidative damage, atrophy, and muscle weakness compared to wild type littermate controls following ACL transection surgery. Taken together, our results indicate that ROS-related damage is a causative mechanism of muscle dysfunction after knee injury, and that mitochondrial antioxidant protection may hold promise as a therapeutic target to prevent weakness and development of disability.
| Original language | English |
|---|---|
| Pages (from-to) | 191-198 |
| Number of pages | 8 |
| Journal | Free Radical Biology and Medicine |
| Volume | 212 |
| DOIs | |
| State | Published - Feb 20 2024 |
Bibliographical note
Publisher Copyright:© 2023 Elsevier Inc.
Funding
Research reported in this publication was supported by the National Institute of Arthritis and Musculoskeletal and Skin Diseases of the National Institutes of Health ( NIH ) under Award Numbers R01 AR072061 (CSF), R01 AR071398 (BN), and K99 AR081367 (YW). This project was also supported by grants P20GM103436 and UL1TR001998 from the NIH . The content is solely the authors’ responsibility and does not necessarily represent the views of the NIH. Research reported in this publication was supported by the National Institute of Arthritis and Musculoskeletal and Skin Diseases of the National Institutes of Health (NIH) under Award Numbers R01 AR072061 (CSF), R01 AR071398 (BN), and K99 AR081367 (YW). This project was also supported by grants P20GM103436 and UL1TR001998 from the NIH. The content is solely the authors’ responsibility and does not necessarily represent the views of the NIH.The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Christopher Fry reports financial support was provided by University of Kentucky. Christopher Fry reports a relationship with University of Kentucky that includes: funding grants.
| Funders | Funder number |
|---|---|
| National Institutes of Health (NIH) | R01 AR071398, UL1TR001998, P20GM103436, R01 AR072061, K99 AR081367 |
| National Institutes of Health (NIH) | |
| National Institute of Arthritis and Musculoskeletal and Skin Diseases | |
| University of Kentucky |
Keywords
- Anterior cruciate ligament
- Knee injury
- Mitochondria
- Quadriceps
- Reactive oxygen species
- Skeletal muscle
ASJC Scopus subject areas
- Biochemistry
- Physiology (medical)