Abstract:
:Resveratrol (3,4',5-trihydroxy-trans-silbene), a natural phytoalexin found in grapes and other food products, has promising anti-inflammatory and anticancer effects. To observe the modulation of interleukin-8 (IL-8) production in human monocytic cells by resveratrol and explore its mechanism at the gene transcription level, U937 cells were stimulated with phorbol 12-myristate 13-acetate (PMA) for 24h. IL-8 protein in supernatants was measured by radioimmunoassay. The cytotoxicity of PMA, dexamethasone and resveratrol was accessed by MTT cell proliferation assay. The RNA level of glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and IL-8 were detected by RT-PCR using specific primers. DNA binding activities of NF-kappaB and AP-1 were examined by electrophoretic mobility shift assay (EMSA). 0.01-100 nM PMA could significantly induce IL-8 production in U937 cells; 10 microM Dexamethasone and 10, 1, 0.1 microM resveratrol could inhibit PMA-induced IL-8 protein production and mRNA accumulation. The cytotoxicity did not contribute to their inhibitory effect. The DNA binding activity of AP-1 was inhibited by dexamethasone and resveratrol, but resveratrol has little effect on PMA-induced NF-kappaB activation. Resveratrol could inhibit PMA-induced IL-8 production in U937 cells at protein and mRNA levels. The suppression of IL-8 gene transcription by resveratrol was, at least partly, due to inhibition of AP-1 activation.
journal_name
J Asian Nat Prod Resjournal_title
Journal of Asian natural products researchauthors
Shen F,Chen SJ,Dong XJ,Zhong H,Li YT,Cheng GFdoi
10.1080/1028602031000066852keywords:
subject
Has Abstractpub_date
2003-06-01 00:00:00pages
151-7issue
2eissn
1028-6020issn
1477-2213journal_volume
5pub_type
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