期刊
JOURNAL OF ANTIBIOTICS
卷 56, 期 6, 页码 513-519出版社
JAPAN ANTIBIOT RES ASSN
DOI: 10.7164/antibiotics.56.513
关键词
-
A novel inhibitor of STAT6 activation, named as TMC-264 (1), was discovered from the fermentation broth of Phoma sp. TC 1674. Based on spectroscopic analyses, TMC-264 was found to be a novel tricyclic polyketide with chloro-1H-dibenzo[b,d]pyran-4,6-dione. TMC-264 suppressed expression of IL-4 driven luciferase and germline Cepsilon mRNA with IC50 values of 0.3 mum and 0.4 mum, respectively. TMC-264 exhibited a potent inhibitory activity against tyrosine phosphorylation of STAT6 with an IC50 value of 1.6 mum, whereas TMC-264 weakly inhibited tyrosine phosphorylation of STAT5 with an IC50 value of 16 mum, but did not inhibit the phosphorylation of STAT1 up to 40 mum. TMC-264 blocked formation of the complexes between phosphorylated STAT6 and STAT6 oligonucleotides in a dose dependent manner, while TMC-264 did not affect the formation of phosphorylated STAT1/STAT1 oligonucleotides complexes. These results suggested that TMC-264 selectively inhibited IL-4 signaling by interfering both of phosphorylation of STAT6 and binding of the phosphorylated STAT6 to the recognition sequence.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据