| Description: |
Astilbin has insecticidal, antioxidant, antibacterial, and anti-inflammatory activities, it may act as an efficient therapeutic agent for arthritis like cyclosporine A but with less toxicity, its mechanism includes a selective suppression on lymphocyte functions via reducing MMP and NO production. Astilbin can exert an early renal protective role to diabetic nephropathy (DN), inhibit production of transforming growth factor-beta1 (TGF-beta1) and connective tissue growth factor (CTGF).Astilbin also alleviates contact hypersensitivity through a unique mechanism involving a negative cytokine regulation through stimulating IL-10, which is distinct from the immunosuppressant cyclosporin A. |
| Targets: |
TGF-β/Smad | IL Receptor | NF-kB | TNF-α | IFN-γ | NO | MMP(e.g.TIMP) | CTGF |
| In vitro: |
| J Ethnopharmacol. 2006 Jun 30;106(2):272-8. | | Isolation and in vitro antibacterial activity of astilbin, the bioactive flavanone from the leaves of Harungana madagascariensis Lam. ex Poir. (Hypericaceae).[Pubmed: 16483735 ] | Harungana madagascariensis is well known for its topical antibacterial properties used in the elaboration of a lot of skin hygiene products. The aim of this study was, on the one hand, to evaluate the in vitro antibacterial activities of aqueous, ethanolic and ethyl acetate crude extracts of Harungana madagascariensis leaves against bacterial strains representative of skin microflora and, on the other hand, to determine the chemical structure of the active compound. Only the ethyl acetate leaf extract presented important antibacterial activity.
METHODS AND RESULTS:
Its fractionation was carried out by column chromatography using silica gel 60 and it yielded 11 fractions. A bioautographic method, revealed in these fractions the presence of a flavanone as the active compound astilbin or 3-O-alpha-L-rhamnoside-5,7,3',4'-tetrahydroxydihydroflavonol which was identified on the basis of its spectroscopic data. Concerning the antibacterial activity against the representative skin microflora of the armpit and feet, MIC and MBC ranged from 25 to 250 and 100 to 750 microg ml-1, respectively.
CONCLUSIONS:
The results showed that some bacteria considered to be responsible for bad odours at the armpit and feet levels, were destroyed at 200 microg ml-1 (MBC), a concentration sparing most of the useful saprophytic microflora. The minimal inhibitory quantity (MIQs) of astilbin ranged from 50 to 100 microg. | | Food Chem.,2009,115(1):297-303. | | Antioxidant activity of Rhizoma Smilacis Glabrae extracts and its key constituent-astilbin.[Reference: WebLink] | Rhizoma Smilacis Glabrae is widely consumed by Chinese as functional food and in folk medicine for its medicinal properties. In this study, methanol and water extracts of Rhizoma Smilacis Glabrae were prepared. The water extract was further divided into polysaccharide and supernatant fractions.
METHODS AND RESULTS:
Constituents in different extracts were analysed by capillary electrophoresis, and levels of total phenolics were also determined using the Folin-Ciocalteu method. Astilbin, the main constituent in the herb, was isolated and purified. Different antioxidant tests were employed to evaluate the antioxidant activities of the extracts and the isolated astilbin, and the results were compared with two commonly used synthetic antioxidants-butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT). Methanol, water extract and supernatant fraction showed concentration dependent antioxidant activity while polysaccharide didn’t show any antioxidant activity.
CONCLUSIONS:
Purified astilbin showed the strongest antioxidant activity in comparison to any other extracts. | | Pest Manag Sci. 2002 May;58(5):503-7. | | Biological activity of astilbin from Dimorphandra mollis against Anticarsia gemmatalis and Spodoptera frugiperda.[Pubmed: 11997979 ] |
METHODS AND RESULTS:
Astilbin was isolated in high yield from Dimorphandra mollis, and its insecticidal and growth inhibiting activity by stomach ingestion were evaluated against Anticarsia gemmatalis and Spodoptera frugiperda. The insecticidal activity of astilbin, the weight reduction of the larval phase and the prolongation of the larval and pupal phases were verified for both species.
CONCLUSIONS:
Astilbin was identified on the base of its NMR, MS and physical data. |
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| In vivo: |
| Food Chem Toxicol. 2014 Jan;63:104-10. | | Astilbin protects diabetic rat heart against ischemia-reperfusion injury via blockade of HMGB1-dependent NF-κB signaling pathway.[Pubmed: 24211745] | Astilbin, a flavonoid compound was isolated from the rhizome of Smilax china L.
METHODS AND RESULTS:
In this study, we investigated the anti-myocardial ischemia and reperfusion (I/R) injury effect of Astilbin on diabetic rats in vivo and elucidated the potential mechanism in vitro. The results showed that Astilbin significantly attenuated hypoxia-induced cell injury in a concentration-dependent manner. Treatment of H9c2 cells with Astilbin at 15 μM blocked nuclear factor kappaB (NF-κB) phosphorylation by blocking High-mobility group box protein 1 (HMGB1) expression. Treatment of diabetic rats with Astilbin by intravenous injection (i.v.) at a single dose of 50 mg/kg protected the rats from myocardial I/R injury as indicated by decreasing infarct volume, improving hemodynamics and reducing myocardial damage, and also lowered serum levels of pro-inflammatory factors, reduced HMGB1 and phosphorylated NF-κB expression in ischemic myocardial tissue from diabetic rats. Additionally, treatment of diabetic rats with Astilbin at dose of 50 mg/kg by i.v. for continuous 14 days attenuated cardiac remodeling in the model myocardial I/R injury.
CONCLUSIONS:
These protective effects suggested that Astilbin might be due to block of the myocardial inflammatory cascade via the HMGB1-dependent NF-κB signaling pathway. | | J Pharm Pharmacol. 2004 Apr;56(4):495-502. | | Astilbin prevents concanavalin A-induced liver injury by reducing TNF-alpha production and T lymphocytes adhesion.[Pubmed: 15104095] | The aim of this study was to evaluate the effect of astilbin on concanavalin A (Con A)-induced hepatitis, a T cell-dependent model of liver injury.
METHODS AND RESULTS:
Con A administration resulted in a severe liver injury in mice, with a strong increment in spleen cell adhesion and liver infiltration of T cells, as well as in tumour necrosis factor (TNF)-alpha production. Against this liver injury, astilbin significantly inhibited the elevation in transaminase activity, reduced the TNF-alpha production, and improved the histological changes, including inflammatory infiltration, hepatocyte necrosis and degeneration and Kupffer cell hyperplasia. In addition, astilbin inhibited the adhesion of spleen cells and purified T lymphocytes isolated from the liver-injured mice to fibronectin, laminin and type IV collagen.Moreover, the adhesion of human Jurkat T cells to endothelial cell line ECV-304 was also inhibited by astilbin.
CONCLUSIONS:
These results suggest that the improvement of the T cell-mediated liver injury by astilbinmay be related to the reduction in TNF-alpha production and in T cell adhesion to extracellular matrices and endothelial cells. | | Food Chem Toxicol . 2018 Apr;114:227-236. | | Astilbin ameliorates cisplatin-induced nephrotoxicity through reducing oxidative stress and inflammation[Pubmed: 29471006] | | Abstract
Oxidative stress and inflammation are considered to be the main pathogenesis of cisplatin nephrotoxicity. Astilbin, a flavonoid with anti-oxidation and anti-inflammation function, has been used to treat heavy metal induced kidney injury. In this study, we investigated the protective effects of astilbin on cisplatin-induced nephrotoxicity and its underlying mechanisms. Our results showed that astilbin markedly inhibited cisplatin-induced cell apoptosis and recovered cell growth. Astilbin significantly decreased reactive oxygen species (ROS) accumulation and alleviated ROS-induced activation of p53, MAPKs and AKT signaling cascades, which in turn attenuated cisplatin-induced HEK-293 cell apoptosis. Astilbin effectively enhanced NRF2 activation and transcription of its targeting antioxidant genes to reduce ROS accumulation in cisplatin-induced HEK-293 cells. Furthermore, we found that astilbin obviously suppressed tumor necrosis factor alpha (TNF-α) expression and NF-κB activation, and also inhibited the expression of induced nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2). Finally, we confirmed that the effect of astilbin to improve renal oxidative stress and inflammation in cisplatin induced acute nephrotoxic mice. In conclusion, our study suggests that astilbin could ameliorate the cisplatin-induced nephrotoxicity by reducing oxidative stress and inflammation.
Keywords: Astilbin; Cisplatin nephrotoxicity; Inflammation; NRF2; Oxidative stress. |
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