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Antioxidant and anti-inflammatory activities of Lespedeza cuneata in Coal fly ash-induced murine alveolar macrophage cells

  • Abdul Wahab (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Hwayong Sim (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Kyubin Choi (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Yejin Kim (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Yookyeong Lee (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Byungwook Kang (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Yu Seong No (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Dongyeop Lee (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Inseo Lee (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Jaehyeon Lee (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Hwajun Cha (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Sung Dae Kim (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Evelyn Saba (Department of Veterinary Biomedical Sciences, Faculty of Veterinary and Animal Sciences, Pir Mehr Ali Shah Arid Agriculture University) ;
  • Man Hee Rhee (Department of Veterinary Medicine, College of Veterinary Medicine, Kyungpook National University)
  • Received : 2023.06.10
  • Accepted : 2023.08.31
  • Published : 2023.09.30

Abstract

Lespedeza cuneata (LC) is a perennial plant used in herbal medicine to treat numerous diseases, including prostatic hyperplasia, diabetes, early atherosclerosis, and hematuria. Reference collections of bioactive compounds of LC are crucial for the determination of their pharmacological properties. However, little is known regarding its anti-oxidative and anti-inflammatory effects in alveolar macrophage (MH-S) cells. This study examined whether LC can inhibit reactive oxygen species and Coal fly ash (CFA) induced inflammation in MH-S cells. The anti-oxidative effects of LC were evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays, anti-inflammatory effects were examined using nitric oxide (NO) assay, and cytotoxicity was analyzed using methyl thiazolyl tetrazolium assay. The expression of inflammatory cytokine genes was assessed through a reverse-transcription polymerase chain reaction. Our results revealed that LC exhibited high radical scavenging activity and a dose-dependent (7.8-1,000 ㎍/mL) inhibition of oxidation as compared to ascorbic acid and Trolox. It also inhibited CFA-induced NO production in MH-S cells. Moreover, it suppressed the CFA exposure-mediated expression of pro-inflammatory mediators and cytokines, including inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), interleukin (IL)-1β, IL-6, and tumor necrosis factor-α. These results suggest that LC is a potent antioxidant and anti-inflammatory agent that can be useful as a nutraceutical product.

Keywords

Acknowledgement

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2022R1A2C1012963).

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