Synthesis and antitumor activity of new alkylphospholipids containing modifications of the phosphocholine moiety.
作者:Kiyoshi UKAWA、Eiko IMAMIYA、Hiroaki YAMAMOTO、Katsutoshi MIZUNO、Akihiro TASAKA、Zen-ichi TERASHITA、Tetsuya OKUTANI、Hiroaki NOMURA、Takashi KASUKABE、Motoo HOZUMI、Ichiro KUDO、Keizo INOUE
DOI:10.1248/cpb.37.1249
日期:——
New antitumor alkylglycerophospholipids, in which primarily the phosphocholine moiety of the platelet activating factor (PAF) molecule was modified, were synthesized from 1-alkyl-2-substituted glycerols by introducing polar head phosphoryl groups having methylene bridges of various lengths (from 2 to 14 carbons). They were tested for PAF agonistic activity and antitumor properties. In a series of 1-octadecyl-2-acetoacetylglycerophospholipids (1a-f), an increase in the length of the methylene bridge separating the phosphate and trimethylammonio group in the polar head side chain at position 3 of the glycerol backbone resulted in a progressive decrease in PAF agonistic activity and a characteristic change in antitumor activity against human promyelocytic leukemia cells (HL-60). Maximal potency was obtained with the compound having a decamethylene bridge (1e, IC50 value=1.5 μg/ml). Thus, alkylphospholipids possessing a decanmethylene bridge and a variety of substituents at position 2 (1g-n) were synthesized. They showed potent inhibitory activity with IC50 values ranging from 0.4 to 1.9 μg/ml, depending on the nature of the 2-substituent in the phospholipid molecule. In in vivo tests of the present series of alkylglycerophospholipids (1a-n), using mice bearing sarcoma 180 and mice with mammary carcinoma MM46 (both cells and compounds were given i.p.), 1-octadecyl-2-acetoacetyl-3-glyceryl ω-trimethylammoniodecyl phosphate (1e) showed the most potent life-prolonging effect. The structure-activity relationships are discussed.
新型抗肿瘤烷基甘油磷脂是通过对血小板活化因子(PAF)分子中的磷酸胆碱部分进行修饰,从1-烷基-2-取代甘油中合成而得。通过引入具有不同长度(从2到14个碳)的亚甲基桥的极性头部磷酰基团进行了合成,并测试了其对PAF激动活性和抗肿瘤性质的影响。在一系列1-十八烷基-2-乙酰乙酰甘油磷脂(1a-f)中,随着甘油主链位置3处的磷酸和三甲铵基团之间的亚甲基桥长度增加,PAF激动活性逐渐降低,对人类早幼粒白血病细胞(HL-60)的抗肿瘤活性也发生了特征性变化。通过具有癸二烯桥的化合物(1e,IC50值=1.5μg/ml)获得了最大效力。因此,合成了具有癸二烯桥和在位置2具有各种取代基的烷基磷脂(1g-n)。它们表现出强烈的抑制活性,IC50值范围从0.4到1.9μg/ml,具体取决于磷脂分子中2-取代基的性质。在体内测试中,通过使用携带肉瘤180的小鼠和携带乳腺瘤MM46的小鼠(两种细胞和化合物均以腹腔途径给予),1-十八烷基-2-乙酰乙酰-3-甘油ω-三甲铵癸二烯磷酸酯(1e)表现出最强的延长寿命效果。讨论了结构-活性关系。