Anticancer Res:S-1、伊立替康联合贝伐单抗治疗转移性结直肠癌患者的II期试验

2014-06-25 Alexa 译 医学论坛网

背景:伊立替康可引起S期特异性细胞死亡,其活性代谢物SN-38是由羧酸酯酶催化的。长时间暴露于低浓度的伊立替康与饱和的羧酸酯酶,可增强治疗效果(Houghton PJ,1995,Rothenberg ML,1998)。曾报道过口服UFT/亚叶酸钙或S-1联合24小时输注伊立替康是非常有效的。因此对S-1、24小时输注伊立替康联合贝伐单抗治疗转移性结直肠癌(mCRC)的有效性和安全性进行了研究。

背景:伊立替康可引起S期特异性细胞死亡,其活性代谢物SN-38是由羧酸酯酶催化的。长时间暴露于低浓度的伊立替康与饱和的羧酸酯酶,可增强治疗效果(Houghton PJ,1995,Rothenberg ML,1998)。曾报道过口服UFT/亚叶酸钙或S-1联合24小时输注伊立替康是非常有效的。因此对S-1、24小时输注伊立替康联合贝伐单抗治疗转移性结直肠癌(mCRC)的有效性和安全性进行了研究。

方法:研究纳入年龄≥20岁、ECOG PS为0-1的mCRC患者。第1至14天,每日给予S-1(80-120mg/天),第1、15天给予患者连续24小时静脉输注伊立替康。基于之前I期研究试验的结果携带UGT1A1*28等位基因纯合子的患者接受100 mg/m2伊立替康治疗,而携带其它基因型的患者接受125 mg/m2伊立替康治疗。第1、15天静脉给予患者贝伐单抗(5 mg/kg),之后休息2周。每4周重复。主要终点是总反应率(OR);次要终点是无进展生存期(PFS)、总生存期(OS)和安全性。

结果:共纳入79例患者,中位年龄68岁(38~85岁),42%为女性; ECOG PS评分为0和1的患者比例分别为58%和42%;接受一线和二线疗法的患者比例分别为58%和42%(辅助化疗患者占16%)。3例患者(4%)为纯合子UGT1A1*28等位基因。中位随访时间为18.1个月;治疗周期中位数为7个周期。OR率为77.2%(95%置信区间,66.4-85.9;一线疗法为80.4%,二线疗法为72.7%);中位PFS为15.3个月(一线疗法为15.8个月;二线疗法为14.5个月);未进行中位OS评估。发生率≥10%的3级以上不良事件包括中性粒细胞减少(43.0%),白细胞减少(20.3%),厌食(19.0%)和腹泻(10.1%)。

结论:无论是作为转移性结直肠癌的一线还是二线治疗,该方案安全耐受有效。临床试验信息:10R-121。

原始出处

Iwase H1, Shimada M, Tsuzuki T, Horiuchi Y, Kumada S, Haruta J, Yamaguchi T, Sugihara M, Ina K, Kusugami K, Goto S.A phase II multicentric trial of S-1 combined with 24 h-infusion of cisplatin in patients with advanced gastric cancer.Anticancer Res. 2005 Mar-Apr

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