Astragalus polysaccharide, a component of traditional Chinese medicine, inhibits muscle cell atrophy (cachexia) in an in vivo and in vitro rat model of chronic renal failure by activating the ubiquitin-proteasome pathway

Geng,Zhenbo; Wei,Lianbo; Zhang,Chunhua; Yan,Xiaohua

doi:10.3892/etm.2017.4492

Astragalus polysaccharide, a component of traditional Chinese medicine, inhibits muscle cell atrophy (cachexia) in an in vivo and in vitro rat model of chronic renal failure by activating the ubiquitin-proteasome pathway

Authors:
- Zhenbo Geng
- Lianbo Wei
- Chunhua Zhang
- Xiaohua Yan
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Affiliations: Nephropathy Center of Integrated Traditional Chinese Medicine and Western Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China, Department of Traditional Chinese Medicine, Weihai City Chinese Hospital, Weihai, Shandong 264200, P.R. China, Department of Traditional Chinese Medicine, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
Published online on: May 22, 2017 https://doi.org/10.3892/etm.2017.4492
Pages: 91-96
Copyright: © Geng et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study aimed to determine the effect of Astragalus polysaccharide (APS) in an in vivo and in vitro rat model of muscle atrophy (cachexia) caused by chronic renal failure (CRF), along with the potential corresponding roles of atroglin‑1 and the ubiquitin‑proteasome pathway. A rat model of CRF was established using subtotal bilateral nephrectomy. It was observed by reverse transcription‑quantitative polymerase chain reaction and western blot analysis that APS and the specific inhibitor of nuclear factor (NF)‑κB, pyrrolidine dithiocarbamate (PDTC), significantly reduced the expression of atrogin‑1, ubiquitin and the NF‑κB subunit p65 mRNA in rat skeletal muscle in vivo and in vitro, respectively (P<0.05). NF‑κB and PDTC also markedly reduced the expression of atrogin‑1, ubiquitin and p65 protein. In addition, cultured rat myoblasts pretreated with tumor necrosis factor (TNF)‑α exhibited significantly reduced expression of atrogin‑1, ubiquitin and p65 mRNA in vitro (P<0.05). Fluorescence microscopy was subsequently used to evaluate TNF‑α‑treated myoblasts administered with APS or PDTC, whereby no evidence of muscle cell atrophy was observed in cells treated with APS. These data suggest that APS may delay muscle cell atrophy associated with cachexia in CRF by targeting atrogin‑1 and the ubiquitin-proteasome pathway.

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