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Article

Prolonged Endurance Exercise Adaptations Counteract Doxorubicin Chemotherapy-Induced Myotoxicity in Mice

by 1, 2, 3,*,† and 1,4,*,†
1
Research Institute of Sports Science and Industry, Hanyang University, Seongdong-gu, Seoul 04763, Korea
2
Department of Food and Nutrition, Hanyang University, Seongdong-gu, Seoul 04763, Korea
3
Department of Movement Sciences and Health, Usha Kundu, MD College of Health, University of West Florida, Pensacola, FL 32514, USA
4
Human-Tech Convergence Program, Department of Physical Education, Hanyang University, Seongdong-gu, Seoul 04763, Korea
*
Authors to whom correspondence should be addressed.
Thease authors contributed equally to this work.
Academic Editor: Francesca Silvagno
Appl. Sci. 2022, 12(7), 3652; https://doi.org/10.3390/app12073652
Received: 1 March 2022 / Revised: 24 March 2022 / Accepted: 3 April 2022 / Published: 5 April 2022
(This article belongs to the Special Issue Exercise Science Animal Model)
Doxorubicin (DOX) is a potent chemotherapeutic agent widely used for various types of cancer; however, its accumulation causes myotoxicity and muscle atrophy. Endurance exercise (EXE) has emerged as a vaccine against DOX-induced myotoxicity. However, potential molecular mechanisms of EXE-mediated myocyte protection for the unfavorable muscle phenotype remain unelucidated. In addition, most studies have identified the short-term effects of DOX and EXE interventions, but studies on the prolonged EXE effects used as adjuvant therapy for chronic DOX treatment are lacking. Twelve-week-old adult male C57BL/6J mice were assigned to four groups: sedentary treated with saline (SED-SAL, n = 10), endurance exercise treated saline (EXE-SAL, n = 10), sedentary treated with doxorubicin (SED-DOX, n = 10), and endurance exercise treated with doxorubicin (EXE-DOX, n = 10). Mice were intraperitoneally injected with DOX (5 mg/kg) or saline five times biweekly for eight weeks, while a treadmill running exercise was performed. Body composition was assessed and then soleus muscle tissues were excised for histological and biochemical assays. Our data showed that DOX aggravated body composition, absolute soleus muscle mass, and distinct pathological features; also, TOP2B upregulation was linked to DOX-induced myotoxicity. We also demonstrated that EXE-DOX promoted mitochondrial biogenesis (e.g., citrate synthase). However, no alterations in satellite cell activation and myogenesis factors in response to DOX and EXE interventions were observed. Instead, SED-DOX promoted catabolic signaling cascades (AKT-FOXO3α-MuRF-1 axis), whereas EXE-DOX reversed its catabolic phenomenon. Moreover, EXE-DOX stimulated basal autophagy. We showed that the EXE-mediated catabolic paradigm shift is likely to rescue impaired muscle integrity. Thus, our study suggests that EXE can be recommended as an adjuvant therapy to ameliorate DOX-induced myotoxicity. View Full-Text
Keywords: doxorubicin; chemotherapy; myotoxicity; endurance exercise; skeletal muscle; proteolytic system; autophagy; body composition; topoisomerase II β; AKT-FOXO3α-MuRF-1 doxorubicin; chemotherapy; myotoxicity; endurance exercise; skeletal muscle; proteolytic system; autophagy; body composition; topoisomerase II β; AKT-FOXO3α-MuRF-1
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MDPI and ACS Style

Kwon, I.; Go, G.-W.; Lee, Y.; Kim, J.-H. Prolonged Endurance Exercise Adaptations Counteract Doxorubicin Chemotherapy-Induced Myotoxicity in Mice. Appl. Sci. 2022, 12, 3652. https://doi.org/10.3390/app12073652

AMA Style

Kwon I, Go G-W, Lee Y, Kim J-H. Prolonged Endurance Exercise Adaptations Counteract Doxorubicin Chemotherapy-Induced Myotoxicity in Mice. Applied Sciences. 2022; 12(7):3652. https://doi.org/10.3390/app12073652

Chicago/Turabian Style

Kwon, Insu, Gwang-Woong Go, Youngil Lee, and Jong-Hee Kim. 2022. "Prolonged Endurance Exercise Adaptations Counteract Doxorubicin Chemotherapy-Induced Myotoxicity in Mice" Applied Sciences 12, no. 7: 3652. https://doi.org/10.3390/app12073652

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