期刊
JOURNAL OF NATURAL PRODUCTS
卷 74, 期 6, 页码 1484-1490出版社
AMER CHEMICAL SOC
DOI: 10.1021/np2002572
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资金
- BMRC [06/1/21/19/443]
- BioMedical Research Council of Singapore [09/1/21/19/595]
- Exploit Technology Private Limited [HQ/S10-095COT0_21]
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 LL-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 hyperresponsiveness. This substance also blocked p65 nuclear translocation and DNA-binding activity in the OVA-challenged lung and in TNF-alpha-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-kappa B. 14-Deoxy-11,12-didehydroandrographolide (1) may be considered as a safer analogue of 2 for the potential treatment of asthma.
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