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槲皮素苯基异氰酸酯抗肿瘤实验研究

Induction of Apoptosis and Tumor Regression by Phenylisocyanate Derivative of Quercetin

【作者】 叶斌

【导师】 魏于全;

【作者基本信息】 四川大学 , 肿瘤学, 2006, 博士

【摘要】 槲皮素(Quercetin,Que)是一种广泛存在于植物中的天然的黄酮类化合物,具有广泛的生理活性。据报道,槲皮素具有抗炎、抗过敏、扩张冠脉、抗血小板聚集、抗氧化、抗癌防癌、调节免疫功能等药理作用,可能在防治慢性退行性疾病过程中发挥重要作用,因而备受关注。槲皮素几乎不溶于水,影响其在人体内的吸收和利用,阻碍了槲皮素的临床开发应用。为了获得生物利用度改善的槲皮素衍生物,我们最近通过对槲皮素进行结构修饰,设计并合成了水溶性增强的槲皮素衍生物—槲皮素苯基异氰酸酯(Phenylisocyanate of Quercetin,PHICNQ)。本研究旨在探讨其在体内、外的抗肿瘤作用。 方法:以不同剂量的Que(K562细胞,40μM-200μM;CT26细胞,100μM-500μM)和PHICNQ(0.5μM-10μM)作用于培养的人慢性骨髓性白血病细胞K562、小鼠结肠癌细胞CT26,在不同时间(24h、48h、72h、96h)收取细胞,用台盼蓝染色细胞计数法分析肿瘤细胞抑制率,用PI染色观察细胞的凋亡情况,用DNA琼脂糖凝胶电泳和流式细胞术检测肿瘤细胞的细胞周期和凋亡率。我们建立了CT26结肠癌(BALB/c小鼠)肿瘤模型和Lewis肺癌(C57BL/6小鼠)肿瘤模型,将小鼠随机分成4

【Abstract】 Quercetin( Que, 3,3’,4’,5,7-pentahydroxy flavone) a widely distributed bioflavonoid in the plant kingdom, has important effects on cancer chemoprevention and chemotherapy. As a result of its bad solubility in pharmaceutically acceptable solvents and bad pharmacokinetic properties that lead to the poor absorption/availability after oral administration of Quercetin and so badly affected the clinic development of Quercetin. Therefore it is significant to design and synthesize Quercetin derivatives with enhanced water solubility and better pharmacokinetic properties by structure modification on Quercetin. A novel Quercetin derivative(phenylisocyanate of Quercetin, PHICNQ) was synthesized using isocyanate as a intermediate in the phase transfer catalyst. The present study was designed to investigate whether PHICNQ potentiates the antitumor activity in vitro and in vivo.MethodsInhibition of proliferation of PHICNQ on K562 and CT26 tumor cells

  • 【网络出版投稿人】 四川大学
  • 【网络出版年期】2007年 03期
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