Protective role of 14-deoxy-11,12-didehydroandrographolide, a noncytotoxic analogue of andrographolide, in allergic airway inflammation.
J Nat Prod
; 74(6): 1484-90, 2011 Jun 24.
Article
em En
| MEDLINE
| ID: mdl-21598983
ABSTRACT
Our group recently reported novel anti-inflammatory effects of andrographolide (2), a bioactive molecule isolated from Andrographis paniculata, in a mouse asthma model. However, 2 has been shown to possess cytotoxic activity. 14-Deoxy-11,12-didehydroandrographolide (1) is an analogue of 2 that can be isolated from A. paniculata. We hypothesized that 1 retains the anti-inflammatory effects for asthma but is devoid of cytotoxicity. In contrast to 2, 1 did not elicit any cytotoxic activity in A549 and BEAS-2B human lung epithelial cells and rat basophilic leukemia (RBL)-2H3 cells using a MTS assay. Compound 1 dose-dependently inhibited ovalbumin (OVA)-induced increases in total and eosinophil counts, IL-4, IL-5, and IL-13 levels in lavage fluid, and serum OVA-specific IgE level in a mouse asthma model. Compound 1 attenuated OVA-induced airway eosinophilia, mucus production, mast cell degranulation, pro-inflammatory biomarker expression in lung tissues, and airway hyper-responsiveness. This substance also blocked p65 nuclear translocation and DNA-binding activity in the OVA-challenged lung and in TNF-α-stimulated human lung epithelial cells. The present findings reveal for the first time that 1 retains the anti-inflammatory activities of 2 for asthma probably through the inhibition of NF-κB. 14-Deoxy-11,12-didehydroandrographolide (1) may be considered as a safer analogue of 2 for the potential treatment of asthma.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article