Open Access

Rifaximin enhances the L‑carnitine‑mediated preventive effects on skeletal muscle atrophy in cirrhotic rats by modulating the gut‑liver‑muscle axis

  • Authors:
    • Koji Murata
    • Kosuke Kaji
    • Norihisa Nishimura
    • Masahide Enomoto
    • Yuki Fujimoto
    • Soichi Takeda
    • Yuki Tsuji
    • Yukihisa Fujinaga
    • Hiroaki Takaya
    • Hideto Kawaratani
    • Tadashi Namisaki
    • Takemi Akahane
    • Hitoshi Yoshiji
  • View Affiliations

  • Published online on: June 9, 2022     https://doi.org/10.3892/ijmm.2022.5157
  • Article Number: 101
  • Copyright: © Murata et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The gut‑liver‑muscle axis is associated with the development of sarcopenia in liver cirrhosis. The present study aimed to illustrate the combined effects of rifaximin and L‑carnitine on skeletal muscle atrophy in cirrhotic rats with steatohepatitis. For this purpose, a total of 344 Fischer rats were fed a choline‑deficient L‑amino acid‑defined (CDAA) diet with the daily oral administration of rifaximin (100 mg/kg) and/or L‑carnitine (200 mg/kg), and measurements of psoas muscle mass index and forelimb grip strength were performed. After feeding for 12 weeks, blood samples, and liver, ileum and gastrocnemius muscle tissues were harvested. The effects of L‑carnitine on rat myocytes were assessed using in vitro assays. Treatment with rifaximin attenuated hyperammonemia and liver fibrosis in the CDAA‑fed rats. Moreover, it improved intestinal permeability with the restoration of tight junction proteins and suppressed the lipopolysaccharide (LPS)‑mediated hepatic macrophage activation and pro‑inflammatory response. In addition, rifaximin prevented skeletal muscle mass atrophy and weakness by decreasing intramuscular myostatin and pro‑inflammatory cytokine levels. Moreover, rifaximin synergistically enhanced the L‑carnitine‑mediated improvement of skeletal muscle wasting by promoting the production of insulin‑like growth factor‑1 and mitochondrial biogenesis, resulting in the inhibition of the ubiquitin‑proteasome system (UPS). The in vitro assays revealed that L‑carnitine directly attenuated the impairment of mitochondrial biogenesis, thereby inhibiting the UPS in rat myocytes that were stimulated with LPS or tumor necrosis factor‑α. On the whole, the present study demonstrates that the combination of rifaximin with L‑carnitine may provide a clinical benefit for liver cirrhosis‑related sarcopenia.
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August-2022
Volume 50 Issue 2

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Murata K, Kaji K, Nishimura N, Enomoto M, Fujimoto Y, Takeda S, Tsuji Y, Fujinaga Y, Takaya H, Kawaratani H, Kawaratani H, et al: Rifaximin enhances the L‑carnitine‑mediated preventive effects on skeletal muscle atrophy in cirrhotic rats by modulating the gut‑liver‑muscle axis. Int J Mol Med 50: 101, 2022
APA
Murata, K., Kaji, K., Nishimura, N., Enomoto, M., Fujimoto, Y., Takeda, S. ... Yoshiji, H. (2022). Rifaximin enhances the L‑carnitine‑mediated preventive effects on skeletal muscle atrophy in cirrhotic rats by modulating the gut‑liver‑muscle axis. International Journal of Molecular Medicine, 50, 101. https://doi.org/10.3892/ijmm.2022.5157
MLA
Murata, K., Kaji, K., Nishimura, N., Enomoto, M., Fujimoto, Y., Takeda, S., Tsuji, Y., Fujinaga, Y., Takaya, H., Kawaratani, H., Namisaki, T., Akahane, T., Yoshiji, H."Rifaximin enhances the L‑carnitine‑mediated preventive effects on skeletal muscle atrophy in cirrhotic rats by modulating the gut‑liver‑muscle axis". International Journal of Molecular Medicine 50.2 (2022): 101.
Chicago
Murata, K., Kaji, K., Nishimura, N., Enomoto, M., Fujimoto, Y., Takeda, S., Tsuji, Y., Fujinaga, Y., Takaya, H., Kawaratani, H., Namisaki, T., Akahane, T., Yoshiji, H."Rifaximin enhances the L‑carnitine‑mediated preventive effects on skeletal muscle atrophy in cirrhotic rats by modulating the gut‑liver‑muscle axis". International Journal of Molecular Medicine 50, no. 2 (2022): 101. https://doi.org/10.3892/ijmm.2022.5157