 |
Journal articles
In vivo and in vitro anti-inflammatory activity of neorogioltriol, a new diterpene extracted from the red algae Laurencia glandulifera.
Abstract : Neorogioltriol is a tricyclic brominated diterpenoid isolated from the organic extract of the red algae Laurencia glandulifera. In the present study, the anti-inflammatory effects of neorogioltriol were evaluated both in vivo using carrageenan-induced paw edema and in vitro on lipopolysaccharide (LPS)-treated Raw264.7 macrophages. The in vivo study demonstrated that the administration of 1 mg/kg of neorogioltriol resulted in the significant reduction of carregeenan-induced rat edema. In vitro, our results show that neorogioltriol treatment decreased the luciferase activity in LPS-stimulated Raw264.7 cells, stably transfected with the NF-κB-dependent luciferase reporter. This effect on NF-κB activation is not mediated through MAPK pathways. The inhibition of NF-κB activity correlates with decreased levels of LPS-induced tumor necrosis factor-alpha (TNFα) present in neorogioltriol treated supernatant cell culture. Further analyses indicated that this product also significantly inhibited the release of nitric oxide and the expression of cyclooxygenase-2 (COX-2) in LPS-stimulated Raw264.7 cells. These latter effects could only be observed for neorogioltriol concentrations below 62.5 μM. To our knowledge, this is the first report describing a molecule derived from Laurencia glandulifera with anti-inflammatory activity both in vivo and in vitro. The effect demonstrated in vitro may be explained by the inhibition of the LPS-induced NF-κB activation and TNFα production. NO release and COX-2 expression may reinforce this effect.
Cited literature [24 references]
https://hal-riip.archives-ouvertes.fr/pasteur-00714047
Contributor : Institut Pasteur Tunis Connect in order to contact the contributor
Submitted on : Tuesday, July 3, 2012 - 11:59:11 AM
Last modification on : Thursday, November 26, 2020 - 3:50:02 PM
Long-term archiving on: : Thursday, October 4, 2012 - 2:54:46 AM
Contributor : Institut Pasteur Tunis Connect in order to contact the contributor
Submitted on : Tuesday, July 3, 2012 - 11:59:11 AM
Last modification on : Thursday, November 26, 2020 - 3:50:02 PM
Long-term archiving on: : Thursday, October 4, 2012 - 2:54:46 AM
File
marinedrugs-09-01293.pdf
Publisher files allowed on an open archive