Inhibition of NF-kappaB-dependent transcription of human immunodeficiency virus 1 promoter by a phosphodiester compound of vitamin C and vitamin E, EPC-K1.
We investigated the effect of EPC-K1, which is a phosphodiester compound of vitamin E and vitamin C, on NF-kappaB activity in human cultured astrocytoma cells T98G. In TNFalpha-stimulated T98G cells, treatment with EPC-K1 inhibited both DNA binding activity and transactivation of NF-kappaB in a dose-dependent manner, and the suppressive effect of EPC-K1 was stronger than either that of vitamin E or vitamin C. Moreover, we showed that in TNFalpha-stimulated T98G cells treatment with EPC-K1 repressed NF-kappaB-dependent activation of the human immunodeficiency virus 1 promoter. In contrast, TNFalpha-induced activation of the human immunodeficiency virus 1 promoter was not completely inhibited by either treatment with vitamin E or vitamin C. We, thus, suggest that EPC-K1 is considered to be one of the inhibitory agents of NF-kappaB.
Hirano
F
F
Second Department of Internal Medicine, Asahikawa Medical College, Nishikagura, Japan.
Tanaka
H
H
Miura
T
T
Hirano
Y
Y
Okamoto
K
K
Makino
Y
Y
Makino
I
I
D000975:Antioxidants / Q000494:pharmacology*; D001205:Ascorbic Acid / Q000031:analogs & derivatives* / Q000494:pharmacology; D001254:Astrocytoma; D004279:DNA, Viral / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D016166:Free Radical Scavengers / Q000494:pharmacology*; D015967:Gene Expression Regulation, Viral / Q000187:drug effects*; D017930:Genes, Reporter / Q000187:drug effects; D015497:HIV-1 / Q000187:drug effects* / Q000235:genetics; D006801:Humans; D016328:NF-kappa B / Q000037:antagonists & inhibitors* / Q000235:genetics; D010957:Plasmids; D011401:Promoter Regions, Genetic / Q000187:drug effects*; D014158:Transcription, Genetic / Q000187:drug effects; D014162:Transfection; D014407:Tumor Cells, Cultured; D014409:Tumor Necrosis Factor-alpha; D014810:Vitamin E / Q000031:analogs & derivatives* / Q000494:pharmacology
D000975:Antioxidants; D004279:DNA, Viral; D016166:Free Radical Scavengers; D016328:NF-kappa B; D014409:Tumor Necrosis Factor-alpha; D014810:Vitamin E; C066638:potassium ascorbyl tocopheryl phosphate; D001205:Ascorbic Acid