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Silkworm pupal extracts attenuate interleukin-1β-induced expression of matrix metalloproteinases and inflammatory mediators in the SW1353 human chondrosarcoma cell line

  • Kamidi Rahul (Industrial Insect and Sericulture Division, National Institute of Agricultural Sciences, RDA) ;
  • HaeYong Kweon (Industrial Insect and Sericulture Division, National Institute of Agricultural Sciences, RDA) ;
  • Ji Hae Lee (Industrial Insect and Sericulture Division, National Institute of Agricultural Sciences, RDA)
  • Received : 2023.06.02
  • Accepted : 2023.06.20
  • Published : 2023.06.30

Abstract

Osteoarthritis (OA) is one of the most prevalent degenerative joint diseases and is more common in older and obese individuals. Silkworm male pupae exerts tonic effects by increasing testosterone secretion and the forced swimming time and muscle ratio increased in mice consuming silkworm pupae, which may be beneficial to the older population. Therefore, it will be beneficial to investigate the effects of silkworm pupal extracts (SPE) on OA. To confirm this effect, we prepared SPE in different solvents, and their ability to attenuate matrix metalloproteinases (MMPs) and inflammatory mediators (interleukin-6 [IL-6], interleukin-8 [IL-8] and tumor necrosis factor-α [TNF-α]) were evaluated in an interleukin-1β (IL-1β)-induced SW1353 human chondrosarcoma cell line. 70% ethanolic SPE outperformed the other solvents, reducing MMP-1 and MMP-3 expression by up to 53% and 13%, respectively. Further experiments were performed using 70% ethanolic SPE from three distinct pupation stages in males and females. SPE treatment alleviated MMP-1 expression (43.9-47.4%) regardless of pupation stage and sex. Among the inflammatory mediators, 70% ethanolic SPE alleviated IL-6 and TNF-α levels, and the concentrations thereof were lowest in the early-stage male SPE-treated group (43.15% and 56.74%, respectively). In conclusion, 70% ethanolic SPE may prevent IL-1β-induced osteoarthritis by inhibiting MMPs and inflammatory cytokines. Therefore, SPE is a potential therapeutic agent for the treatment of OA.

Keywords

Acknowledgement

This research activity was supported by the 'Research Program for Agriculture Science and Technology Development' (Grant No. PJ01502202), National Institute of Agricultural Sciences, Rural Development Administration, Republic of Korea.

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