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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Synthesis and anti-inflammatory evaluations of β-lapachone derivatives.
Bioorganic & Medicinal Chemistry 2013 January 16
β-Lapachone (β-LAPA), a natural product from the lapacho tree in South America, is a potential chemotherapeutic agent that exhibit a wide variety of pharmacological effects such as anti-virus, anti-parasitic, anti-cancer, and anti-inflammatory activities. In order to discover novel anti-inflammatory agents, we have synthesized a series of β-LAPA derivatives for evaluation. Among them, 4-(4-methoxyphenoxy)naphthalene-1,2-dione (6b) was found to be able to inhibit NO and TNF-α released in LPS-induced Raw 264.7 cells. Inhibition of iNOS and COX-2 was also observed in compound 6b treated cells. Mechanism studies indicated that 6b exhibited anti-inflammatory properties by suppressing the release of pro-inflammatory factors through down-regulating NF-κB activation. In addition, it suppressed NF-κB translocation by inhibiting the phosphorylation of p38 kinase. Our results also indicate that the inhibitory effect of 6b on LPS-stimulated inflammatory mediator production in Raw 264.7 cell is associated with the suppression of the NF-κB and MAPK signaling pathways. A low cytotoxicity (IC(50) = 31.70 μM) and the potent anti-inflammatory activity exhibited by compound 6b make this compound a potential lead for developing new anti-inflammatory agents. Further structural optimization of compound 6b is on-going.
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