Synthesis of Tetrahydropyran-2-carboxylic Acid Derivatives of Lipid A Containing an Olefin in Their Chains and Their LPS-Antagonistic Activities
作者:Yukiko Watanabe、Masao Shiozaki、Daisuke Tanaka、Takaichi Shimozato、Saori Kanai、Shin-ichi Kurakata
DOI:10.1246/bcsj.76.2341
日期:2003.12
Four tetrahydropyran-2-carboxylic acid derivatives with 3-(tetradec-7-enyloxy)tetradecyl chains instead of 3-(tetradecanoyloxy)tetradecanoyl chains in lipid A were synthesized and their biological activities toward human U937 cells, human whole blood cells and mouse peritoneal resident macrophages were measured. These compounds showed LPS-antagonistic activity toward these three kinds of cells. The IC50 values (nM) (1 M = 1 mol dm−3) of these four compounds (21, 21′, 24 and 24′) toward human monoblastic U937 cells were 2.2, 1.0, 0.017 and 0.055, respectively. However, the LPS-antagonistic activities (IC50 values) of these four compounds toward human whole blood cells were only 0.28, 0.21, 0.81 and 0.58 μM, respectively. The IC50 values (μM) toward mouse peritoneal resident macrophages were 2.49, 0.49, 0.91 and 0.69, respectively.
合成了四种四氢吡喃-2-羧酸衍生物,其脂质 A 中的 3-(十四烷-7-烯氧基)十四烷基链取代了 3-(十四烷酰氧基)十四烷基链,并测定了它们对人 U937 细胞、人全血细胞和小鼠腹腔巨噬细胞的生物活性。这些化合物对这三种细胞都具有 LPS 拮抗活性。这四种化合物(21、21′、24 和 24′)对人单倍体 U937 细胞的 IC50 值(nM)(1 M = 1 mol dm-3)分别为 2.2、1.0、0.017 和 0.055。然而,这四种化合物对人全血细胞的 LPS 拮抗活性(IC50 值)分别只有 0.28、0.21、0.81 和 0.58 μM。对小鼠腹腔巨噬细胞的 IC50 值(μM)分别为 2.49、0.49、0.91 和 0.69。