Synthesis of Novel Curcumin Analogues and Their Evaluation as Selective Cyclooxygenase-1 (COX-1) Inhibitors
作者:Norbert Handler、Walter Jaeger、Helmut Puschacher、Klaus Leisser、Thomas Erker
DOI:10.1248/cpb.55.64
日期:——
Curcumin, a major yellow pigment and active component of turmeric, has been shown to possess anti-inflammatory and anti-cancer activities. Recent studies have indicated that cyclooxygenase-1 (COX-1) plays an important role in inflammation and carcinogenesis. In order to find more selective COX-1 inhibitors a series of novel curcumin derivatives was synthesized and evaluated for their ability to inhibit this enzyme using in vitro inhibition assays for COX-1 and COX-2 by measuring PGE2 production. All curcumin analogues showed a higher rate of COX-1 inhibition. The most potent curcumin compounds were (1E,6E)-1,7-di-(2,3,4-trimethoxyphenyl)-1,6-heptadien-3,5-dione (4) (COX-1: IC50=0.06 μM, COX-2: IC50>100 μM, selectivity index>1666) and (1E,6E)-methyl 4-[7-(4-methoxycarbonyl)phenyl]-3,5-dioxo-1,6-heptadienyl]benzoate (6) (COX-1: IC50=0.05 μM, COX-2: IC50>100 μM, selectivity index>2000). Curcumin analogues therefore represent a novel class of highly selective COX-1 inhibitors and promising candidates for in vivo studies.
姜黄素是姜黄的主要黄色素和活性成分,已被证明具有抗炎和抗癌活性。最近的研究表明环氧合酶-1(COX-1)在炎症和癌变中发挥重要作用。为了找到更具选择性的 COX-1 抑制剂,合成了一系列新型姜黄素衍生物,并通过测量 PGE2 的产生,使用 COX-1 和 COX-2 的体外抑制测定来评估其抑制该酶的能力。所有姜黄素类似物均表现出较高的 COX-1 抑制率。最有效的姜黄素化合物是 (1E,6E)-1,7-二-(2,3,4-三甲氧基苯基)-1,6-庚二烯-3,5-二酮 (4) (COX-1: IC50=0.06 μM,COX-2:IC50>100 μM,选择性指数>1666) 和 (1E,6E)-甲基 4-[7-(4-甲氧基羰基)苯基]-3,5-二氧代-1,6-庚二烯基]苯甲酸酯 (6) (COX-1: IC50=0.05 μM, COX-2: IC50>100 μM< /小>,选择性指数>2000)。因此,姜黄素类似物代表了一类新型的高选择性 COX-1 抑制剂,也是体内研究的有希望的候选者。