Antioxidant and immunostimulatory activities of a submerged culture of cordyceps sinensis using spent coffee

Sung Hee Han, Yejin Ahn, Hyun Jung Lee, Hyung Joo Suh, Kyungae Jo

Research output: Contribution to journalArticlepeer-review

Abstract

Spent coffee grounds (SCG) are inexpensive materials that have been used as a source of antioxidants and polysaccharides with immunostimulatory activity. In this study, we performed a microbial fermentation of SCG using Cordyceps sinensis and investigated the radical scavenging and immunostimulatory activity of fermented SCG. SCG fermentation using C. sinensis was performed at 25 °C for 8 d. The polyphenol content of the fermented SCG increased from 1022.4 to 1562.0 Μg/mL. The glucosamine content of the mycelia also continuously increased during fermentation. The main polyphenol compounds of fermented SCG were chlorogenic acid and p-coumaric acid, which were increased by fermentation. Fermented SCG also showed significantly higher content of chlorogenic acid isomers than unfermented SCG. The fermented SCG exhibited significantly higher 2,2-diphenyl- 2-picrylhydrazyl hydrate (half maximal inhibitory concentration: IC50, 0.37 mg/mL) and 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (IC50, 0.93 mg/mL) radical scavenging activities than those of the control (0.54 mg/mL and 1.20 mg/mL, respectively; p > 0.05). The fermented SCG stimulated macrophages and promoted the production of various immunostimulatory cytokines (IL-12, IL-6, and TNF-α) compared to control; therefore, microbial fermentation of SCG using C. sinensis is an effective means of generating antioxidant and immunostimulatory materials.

Original languageEnglish
Article number1697
JournalFoods
Volume10
Issue number8
DOIs
Publication statusPublished - 2021 Aug

Keywords

  • Antiradical
  • Cordyceps sinensis
  • Immunostimulatory activity
  • Spent coffee grounds

ASJC Scopus subject areas

  • Food Science
  • Microbiology
  • Health(social science)
  • Health Professions (miscellaneous)
  • Plant Science

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