期刊
CANCERS
卷 11, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/cancers11040571
关键词
chemotherapy; skeletal muscle wasting; cardiac cachexia; sorafenib; regorafenib
类别
资金
- Department of Surgery at Indiana University
- National Institutes of Health [R21CA190028]
- V Foundation for Cancer Research [V2017-021]
- American Cancer Society [132013-RSG-18-010-01-CCG]
- Graduate NIH Training T32 Fellowship [T32-AR065971]
- Department of Otolaryngology-Head & Neck Surgery at Indiana University
Despite recent progress, chemotherapy remains the preferred treatment for cancer. We have shown a link between anticancer drugs and the development of cachexia, i.e., body wasting accompanied by muscle loss. The multi-kinase inhibitors (MKIs) regorafenib and sorafenib, used as second-line treatment for solid tumors, are frequently accompanied by several side effects, including loss of muscle mass and strength. In the present study we aimed to investigate the molecular mechanisms associated with the occurrence of muscle toxicities in in vivo conditions. Hence, we treated 8-week old healthy CD2F1 male mice with MKIs for up to six weeks and observed decreased skeletal and cardiac muscle mass, consistent with muscle weakness. Modulation of ERK1/2 and GSK3 beta, as well as increased expression of markers of autophagy, previously associated with muscle atrophy conditions, were shown in skeletal muscle upon treatment with either drug. MKIs also promoted cardiac abnormalities consistent with reduced left ventricular mass, internal diameter, posterior wall thickness and stroke volume, despite unchanged overall function. Notably, different signaling pathways were affected in the heart, including reduced expression of mitochondrial proteins, and elevated AKT, GSK3 beta, mTOR, MEK1/2 and ERK1/2 phosphorylation. Combined, our data demonstrate detrimental effects on skeletal and cardiac muscle in association with chronic administration of MKIs, although different mechanisms would seem to contribute to the cachectic phenotype in the two tissues.
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