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Anti-inflammatory and antioxidant activities of Inula viscosa and Senecio anteuphorbium

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Abstract

The present study is focused on the evaluation of anti-inflammatory and antioxidant properties of aqueous extract from the leaves of I. viscosa and the stems of S. anteuphorbium. The anti-inflammatory activity of these plants was studied both in vitro on lipopolysaccharide (LPS)-stimulated J774A.1 mouse macrophages and in vivo using carrageenan-induced paw edema in mice. The antioxidant activitrty of extracts was studied using two in vitro model systems (DPPH· radical-scavenging assay and ABTS assay) and their chemical profiles were investigated. The pre-treatment of J774A.1 cells with S. anteuphorbium aqueous extract (SAAE) and I. viscosa aqueous extract (IVAE) decrease nitric oxide (NO) production and inhibited the expression of inducible nitric oxide synthase (iNOS) in a dose-dependent manner, while the expression of toll-like receptor 4, myeloid differentiation primary response gene 88 and tumor necrosis factor alpha were not affected. The protective anti-inflammatory effect of SAAE and IVAE at an oral dose of 200 mg/kg was also confirmed in vivo. They significantly reduced paw edema after 3 and 6 h of carrageenan stimulation, resperctively. IVAE exhibited a high antioxidant activity and contained high total levels of polyphenols and flavonoids. The major compounds identified in the extract derived from IVAE were tementosin, 3 α-hydroxycostic acid and hydroxycoumarins, and might involve in these effects. This study is the first to report the anti-inflammatory potential of SAAE and IVAE both in vivo and in vitro. The effect demonstrated in vitro may be explained by the inhibition of the LPS-induced NO production through the inhibition of iNOS expression.

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Abbreviations

IVAE:

Inula viscosa aqueous extract

SAAE:

Senecio anteuphorbium aqueous extract

DMEM:

Dulbecco’s modified Eagle’s medium

iNOS:

Inducible nitric oxide synthase

LPS:

Lipopolysaccharide

MyD88:

Myeloid differentiation primary response gene 88

TLR-4:

Toll-like receptor 4

TNF-α:

Tumor necrosis factor alpha

NO:

Nitric oxide

DPPH:

2, 2-Diphenyl-1-picrylhydrazyl

ABTS:

Azino-bis(ethylbenzothiazoline 6-sulfonic acid

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Acknowledgements

We wish to thank the Ministry of High Education and Scientific Research of Algeria for sponsoring this work (the PNE research Grant).

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Correspondence to Kamel Belhamel.

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Ethical statement

All the experimental mice were treated following the Ethical Principles and Guidelines for Scientific Experiments on Animals (1995) formulated by The Swiss Academy of Medical Sciences and the Swiss Academy of Sciences.

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The authors declare that there are no conflicts of interests.

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Lounis, H., Bergheim, I., Bouhaimi, A. et al. Anti-inflammatory and antioxidant activities of Inula viscosa and Senecio anteuphorbium. Orient Pharm Exp Med 18, 225–236 (2018). https://doi.org/10.1007/s13596-018-0307-0

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  • DOI: https://doi.org/10.1007/s13596-018-0307-0

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