Abstract：
AIM:To study the effect of gum mastic, a natural resin, on the proliferation of androgen-independent prostate cancer PC-3 cells, and further investigate the mechanisms involved in this regulatory system, taking nuclear factor kappaB (NF-kappaB) signal as the target. METHODS:3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and a flow cytometer were used to detect the effect of gum mastic on the proliferation of PC-3 cells. Then, reporter gene assay, RT-PCR, and Western blotting were carried out to study the effects of gum mastic on the NF-kappaB protein level and the NF-kappaB signal pathway. The expression of genes involved in the NF-kappaB signal pathway, including cyclin D1, inhibitors of kappaBs (I kappaB alpha), and phosphorylated Akt (p-AKT), were measured. In addition, transient transfection assays with the 5X NF-kappaB consensus sequence promoter was also used to test the effects of gum mastic. RESULTS:Gum mastic inhibited PC-3 cell growth and blocked the PC-3 cell cycle in the G1 phase. Gum mastic also suppressed NF-kappaB activity in the PC-3 cells. The expression of cyclin D1, a crucial cell cycle regulator and an NF-kappaB downstream target gene, was reduced as well. Moreover, gum mastic decreased the p-AKT protein level and increased the I kappa B alpha protein level. CONCLUSION:Gum mastic inhibited the proliferation and blocked the cell cycle progression in PC-3 cells by suppressing NF-kappaB activity and the NF-kappaB signal pathway.
journal_name
Acta Pharmacol Sinjournal_title
Acta pharmacologica Sinicaauthors
He ML,Li A,Xu CS,Wang SL,Zhang MJ,Gu H,Yang YQ,Tao HHdoi
10.1111/j.1745-7254.2007.00536.xsubject
Has Abstractpub_date
2007-03-01 00:00:00pages
446-52issue
3eissn
1671-4083issn
1745-7254journal_volume
28pub_type
杂志文章abstract：AIM:To examine the anti-cancer effects of chamaejasmenin B and neochamaejasmin C, two biflavonones isolated from the root of Stellera chamaejasme L (known as the traditional Chinese herb Rui Xiang Lang Du) in vitro. METHODS:Human liver carcinoma cell lines (HepG2 and SMMC-7721), a human non-small cell lung cancer cell...
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