Abstract
Cancer cachexia is a complex disorder characterized by inflammatory responses, and it is associated with poor performance status and high mortality rate of cancer patients. Carboxyamidotriazole (CAI), a noncytotoxic chemotherapy agent, shows anti-inflammatory features in the treatment of many diseases. Here, we investigated the preventive and therapeutic effects of CAI on muscle loss that occurred in mice with advanced Lewis lung carcinoma (LLC). The carcass weights of CAI-treated mice were significantly higher than that of mice in the vehicle group from Day 19 to the end of the study. The gastrocnemius and epididymal adipose tissue weights were also increased by CAI treatment. The protective mechanisms might be attributed to the following points: CAI treatment inhibited the proteolysis in muscles by decreasing expressions of muscle-specific FoxO3 transcription factor and ubiquitin E3 ligases (MuRF1 and atrogin1). Moreover, CAI restricted the NF-κB signaling, downregulated the level of TNF-α in muscle and both TNF-α and IL-6 levels in serum, directly stimulated SIRT1 activity in vitro, and increased SIRT1 content in muscle. These results indicate that CAI can alleviate muscle wasting and is a promising drug against lung cancer cachexia.
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Abbreviations
- CAI:
-
Carboxyamidotriazole
- DMSO:
-
Dimethyl sulfoxide
- FoxO:
-
Forkhead box O
- IL-6:
-
Interleukin-6
- MuRF1:
-
Muscle-specific RING-finger 1
- PEG400:
-
Polyethylene glycol 400
- PGC-1α:
-
Peroxisome proliferator-activated receptor-γ co-activator-1α
- SIRT1:
-
Silent mating type information regulation 2 homolog 1
- TNF-α:
-
Tumor necrosis factor-α
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This study is supported by Major Scientific and Technological Special Project 2014ZX09507003-003 (Ministry of Science and Technology, China), National Science Foundation of China 81402943, and PUMC Youth Fund (33320140046 and 3332015168).
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All animal manipulations were approved by the Institutional Animal Care and Use Committee of Peking Union Medical College.
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Chen, C., Ju, R., Zhu, L. et al. Carboxyamidotriazole alleviates muscle atrophy in tumor-bearing mice by inhibiting NF-κB and activating SIRT1. Naunyn-Schmiedeberg's Arch Pharmacol 390, 423–433 (2017). https://doi.org/10.1007/s00210-017-1345-8
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DOI: https://doi.org/10.1007/s00210-017-1345-8