Résumé
The apoptosis of nucleus pulposus cells (NPCs) is the main cellular process of intervertebral disc degeneration (IVDD). Our previous studies showed that 17β-estradiol (E
Sujets)
Animaux , Rats , Apoptose , Oestradiol/pharmacologie , Glycogen synthase kinase 3 beta , Interleukine-1 bêta , Nucleus pulposus/métabolisme , Phosphatidylinositol 3-kinases/métabolisme , Protéines proto-oncogènes c-akt/métabolisme , Transduction du signal , Sérine-thréonine kinases TORRésumé
Fibroblast-like synoviocytes (FLS) play a pivotal role in Rheumatoid arthritis (RA) pathogenesis through aggressive migration and invasion. Madecassoside (Madec), a triterpenoid saponin present in Centella asiatica herbs, has a potent anti-inflammatory effect. In the present study, Madec exerted an obvious therapeutic effect in reversing the histological lesions in adjuvant-induced arthritis (AIA) rats. To recognize the anti-rheumatoid potentials of Madec, we further investigated whether Madec interfered with FLS invasion and metalloproteinase (MMP) expression. In cultures of primary FLS isolated from the AIA rats, Madec (10 and 30 μmol·L) was proven to considerably inhibit migration and invasion of FLS induced by interleukin 1β (IL-1β), but exhibiting no obvious effect on cell proliferation. Madec repressed IL-1β-triggered FLS invasion by prohibiting the expression of MMP-13. Additionally, Madec suppressed MMP-13 transcription via inhibiting the MMP-13 promoter-binding activity of NF-κB. Our results further showed that Madec down-regulated the translocation and phosphorylation of NF-κB as demonstrated by Western blotting and immunofluorescence assays. In conclusion, our results suggest that Madec exerts anti-RA activity via inhibiting the NF-κB/MMP-13 pathway.
Sujets)
Animaux , Rats , Antirhumatismaux , Chimie , Pharmacologie , Utilisations thérapeutiques , Arthrite expérimentale , Traitement médicamenteux , Anatomopathologie , Mouvement cellulaire , Noyau de la cellule , Métabolisme , Cellules cultivées , Régulation de l'expression des gènes codant pour des enzymes , Interleukine-1 bêta , Pharmacologie , Matrix Metalloproteinase 13 , Génétique , Facteur de transcription NF-kappa B , Génétique , Métabolisme , Phosphorylation , Transport des protéines , Transduction du signal , Cellules synoviales , Métabolisme , Activation de la transcription , Triterpènes , Chimie , Pharmacologie , Utilisations thérapeutiquesRésumé
Fibroblast-like synoviocytes (FLS) play a pivotal role in Rheumatoid arthritis (RA) pathogenesis through aggressive migration and invasion. Madecassoside (Madec), a triterpenoid saponin present in Centella asiatica herbs, has a potent anti-inflammatory effect. In the present study, Madec exerted an obvious therapeutic effect in reversing the histological lesions in adjuvant-induced arthritis (AIA) rats. To recognize the anti-rheumatoid potentials of Madec, we further investigated whether Madec interfered with FLS invasion and metalloproteinase (MMP) expression. In cultures of primary FLS isolated from the AIA rats, Madec (10 and 30 μmol·L) was proven to considerably inhibit migration and invasion of FLS induced by interleukin 1β (IL-1β), but exhibiting no obvious effect on cell proliferation. Madec repressed IL-1β-triggered FLS invasion by prohibiting the expression of MMP-13. Additionally, Madec suppressed MMP-13 transcription via inhibiting the MMP-13 promoter-binding activity of NF-κB. Our results further showed that Madec down-regulated the translocation and phosphorylation of NF-κB as demonstrated by Western blotting and immunofluorescence assays. In conclusion, our results suggest that Madec exerts anti-RA activity via inhibiting the NF-κB/MMP-13 pathway.