Abstract
Background
Boswellia serrate is an ancient and highly valued ayurvedic herb. Its extracts have been used in medicine for centuries to treat a wide variety of chronic inflammatory diseases. However, the mechanism by which B. serrata hydro alcoholic extract inhibited pro-inflammatory cytokines in zebrafish (Danio rerio) larvae with LPS-induced inflammation remained unknown.
Methods
LC–MS analysis was used to investigate the extract’s phytochemical components. To determine the toxicity of B. serrata extract, cytotoxicity and embryo toxicity tests were performed. The in-vivo zebrafish larvae model was used to evaluate the antioxidant and anti-inflammatory activity of B. serrata extract.
Results
According to an in silico study using molecular docking and ADMET, the compounds acetyl-11-keto-boswellic and 11-keto-beta-boswellic acid present in the extract had higher binding affinity for the inflammatory specific receptor, and it is predicted to be an orally active molecule. In both in-vitro L6 cells and in-vivo zebrafish larvae, 160 µg/mL concentration of extract caused a high rate of lethality. The extract was found to have a protective effect against LPS-induced inflammation at concentrations ranged between 10 and 80 µg/mL. In zebrafish larvae, 80 µg/mL of treatment significantly lowered the level of intracellular ROS, apoptosis, lipid peroxidation, and nitric oxide. Similarly, zebrafish larvae treated with B. serrata extract (80 µg/mL) showed an increased anti-inflammatory activity by lowering inflammatory specific gene expression (iNOS, TNF-α, COX-2, and IL-1).
Conclusions
Overall, our findings suggest that B. serrata can act as a potent redox scavenger against LPS-induced inflammation in zebrafish larvae and an inhibitor of specific inflammatory genes.
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Data availability
The data used to support the findings of this study are available from the corresponding author upon request.
Code availability
Not applicable.
Change history
08 June 2023
A Correction to this paper has been published: https://doi.org/10.1007/s11033-023-08382-9
Abbreviations
- LPS:
-
Lipopolysaccharide
- iNOS:
-
inducible nitric oxide synthase
- COX-2:
-
cyclooxygenase-2
- TNF-α:
-
tumor necrosis factor-alpha
- IL-1:
-
interleukin
- ROS:
-
reactive oxygen species
- LC-MS:
-
Liquid chromatography-mass spectrometry
- ESI:
-
electrospray ionization
- CDL:
-
curved desolation line
- NO:
-
nitric oxide
- DCFDA:
-
2’-7’-dichlorofluorescein diacetate
- DPPP:
-
diphenyl-1-pyrenylphosphine
- BBB:
-
blood-brain barrier
- P-gp:
-
permeability glycoprotein
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Acknowledgements
We would like to thank SRM College of Pharmacy, Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Research Institute and the SRMIST management for providing support during the research work. The authors express their sincere appreciation to the Researchers Supporting Project Number (RSP2022R414), King Saud University, Riyadh, Saudi Arabia.
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Researchers Supporting Project (Number: RSP2022R414), King Saud University, Riyadh, Saudi Arabia.
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NSSS, AG, TMV and JA contributed to the concept and design of the study; NSSS and AG performed the experiments; RCSK, BOA, MHA, AJ, TMV and JA contributed significantly to resources, data analysis, manuscript preparation and perform the analysis with constructive discussions; TMV and JA supervised and checked the manuscript; All authors read and approved the final manuscript.
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The experiments conducted with zebrafish is as per the guidelines of the Institute Animal Ethical Committee and approval (SAF/IAEC/211215/004). This research does not contain any studies with human participants by any of the authors.
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The original online version of this article was revised: The affiliation of the author “Annie Juliet” is corrected as “Foundation for Aquaculture Innovations and Technology Transfer (FAITT), Thoraipakkam, Chennai 600 097, Tamil Nadu, India”.
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Siddhu, N.S.S., Guru, A., Satish Kumar, R.C. et al. Pro-inflammatory cytokine molecules from Boswellia serrate suppresses lipopolysaccharides induced inflammation demonstrated in an in-vivo zebrafish larval model. Mol Biol Rep 49, 7425–7435 (2022). https://doi.org/10.1007/s11033-022-07544-5
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DOI: https://doi.org/10.1007/s11033-022-07544-5