作者:Masao Shiozaki、Masami Arai、Wallace M. Macindoe、Takashi Mochizuki、Takanori Wakabayashi、Shin-ichi Kurakata、Tohru Tatsuta、Hiroaki Maeda、Masahiro Nishijima
DOI:10.1246/bcsj.70.1149
日期:1997.5
Six GLA-60 positional isomers (8, 14, 14′, 20, 26, and 26′) were synthesized to investigate their biological activities. Compound 8 exhibited potent agonistic activity, while compounds 26 and 26′ exhibited slight agonistic activity on TNFα production toward human monoblastic U937 cells. TNFα production (% control; 10 ng ml−1 of LPS = 100) of compound 8 in the concentration of 10 μM was 611, and that of lipid A in the same concentration was 651. In contrast, the difluorinated compounds 14, 14′, and 20 showed little agonistic activity on TNFα production. And neither compound 8 nor compounds 26 and 26′ showed antagonistic activity. On the other hand, the difluorinated compounds 14, 14′, and 20 showed potent antagonistic activity, and inhibited the LPS-induced TNFα production dose-dependently. Compound 14′ (10 μM) inhibited in excess of 80% of the LPS-induced TNFα production.
合成了六种GLA-60位异构体(8、14、14′、20、26和26′)以研究它们的生物活性。化合物8表现出强效的激动活性,而化合物26和26′对人单核细胞U937细胞的TNFα产生表现出轻微的激动活性。在10 μM浓度下,化合物8对TNFα产生的百分比控制(10 ng ml−1的LPS = 100)为611,脂质A在相同浓度下为651。相比之下,二氟化合物14、14′和20对TNFα产生的激动活性很小。同时,化合物8和化合物26、26′均未表现出拮抗活性。另一方面,二氟化合物14、14′和20显示出强效的拮抗活性,并剂量依赖性地抑制LPS诱导的TNFα产生。化合物14′(10 μM)抑制了超过80%的LPS诱导的TNFα产生。