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  • Title: [Studies on the effect of Ginkgo biloba extracts on NF-kappaB pathway].
    Author: Li GH, Lei XX, Yi YM, Xu BL, Wang HP, Du J.
    Journal: Zhong Yao Cai; 2008 Sep; 31(9):1357-60. PubMed ID: 19180958.
    Abstract:
    OBJECTIVE: To investigate NF-kappaB and IkappaBalpha activities in HL-60 induced by TNF-alpha in order to understand the molecular mechanism of GbE in asthma treatment. METHODS: The amount of IkappaBalpha in HL-60 cells stimulated by TNF-alpha and GbE was measured by western blotting. Plasmid pNF-kappaB-LuC was transfected and NF-kappaB activity was analyzed by measuring the expression level of luciferase. RESULTS: It showed in the luciferase assay that the activity of NF-kappaB could significantly be suppressed in HL-60 cells after the pretreatment with CGbE. However, the phosphorylation and subsequent degradation of IKBalpha induced by TNF-alpha can not be inhibited in HL-60 cells even we prolonged the treatment time or increased the concentration of GhE. CONCLUSION: GhE can suppress the NF-kappaB gene expression actively on independent of NIK/ IKK/ IkappaBalpha pathway in HL-60 cells.
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