Frontiers in Nutrition (Jan 2022)

Two Alkaloids From Delphinium brunonianum Royle, Their Anti-inflammatory and Anti-oxidative Stress Activity via NF-κB Signaling Pathway

  • Qi Tang,
  • Sitan Chen,
  • Syed Arif Hussain Rizvi,
  • Jiaojiao Qu,
  • Jiaojiao Qu,
  • Li Wang,
  • Li Wang,
  • Senye Wang,
  • Senye Wang,
  • Changyang Ma,
  • Changyang Ma,
  • Changyang Ma,
  • Lijun Liu,
  • Lijun Liu,
  • Wenyi Kang,
  • Wenyi Kang,
  • Wenyi Kang

DOI
https://doi.org/10.3389/fnut.2021.826957
Journal volume & issue
Vol. 8

Abstract

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In this study, we isolated and identified four compounds in Delphinium brunonianum Royle, and they were Delbrunine (1), 4-O-α-D-Glucosyl benzoic acid (2), Kaempferol 3-O-β-D-glucopyranoside 7-O-α-L-rhamnopyranoside (3) and Eldeline (4). Furthermore, the anti-inflammatory activity of these compounds was screened in RAW264.7 cells. The results showed that the anti-inflammatory activities of compounds 2 and 3 were weak, and 1, 4 had good anti-inflammatory activity. The macrophage inflammation model was established by lipopolysaccharide (LPS). Then, the anti-inflammatory activity was evaluated by ELISA kits, qRT-PCR experiment and western blot experiment. And the anti-oxidative stress activity was assessed by flow cytometry. The results showed that compounds 1, 4 could significantly inhibit the elevation of inflammatory factors nitric oxide (NO), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and also had obvious inhibitory effects on the production of inducible nitric oxide synthase (iNOS) and cyclooxygenase 2 (COX-2). In addition, compounds 1 and 4 could effectively inhibit the overexpression of reactive oxygen species (ROS) in RAW264.7 cells that activated by LPS. These results indicated that compounds 1 and 4 may exert anti-inflammatory and anti-oxidative stress effects through the NF-κB signaling pathway.

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