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TIVO-1优势研究支持Tivozanib作为晚期肾细胞癌一线治疗药物

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发布日期:2012-07-06 16:05 文章来源:丁香园
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对于既往无系统性抗肿瘤治疗的患者,Tivozanib 是首个显示出使无进展生存期(PFS)超过1年的药物。晚期肾癌一线药物中,对比(已上市)活性靶向药物的首次关键性临床试验。研究结果显示同时具有较优的无进展生存期及良好的耐受性,实属难得。

马萨诸塞州坎布里奇&东京-(商业资讯)-2012年5月16日- 美国AVEO制药公司(纳斯达克:AVEO)和日本安斯泰来制药公司(东京证券交易所:4503)今天宣布,TIVO-1 (Tivozanib与晚期肾细胞癌一线药物索拉非尼比较)的详细结果,将在2012年6月2日的美国临床肿瘤学会 (ASCO) 年度会议上,由主要研究者Robert J. Motzer口头公布。Robert J. Motzer是纽约威尔康奈尔大学医学院医学博士, 主治医师,纪念斯隆-凯特琳癌症中心的医学教授,从事泌尿生殖系统肿瘤研究。

TIVO-1是首次进行一线的晚期肾细胞癌的关键优势研究,与已上市的靶向药物(索拉非尼) 比较,研究期药物(tivozanib)显示出显著的统计学和临床意义。

Motzer医生表示“TIVO-1是新颖的,Ⅲ期临床研究使用了已上市的靶向药物作为参比来评估对一线肾细胞癌的治疗效果,研究病例属于无既往化疗史的晚期肾癌患者,并且满足无进展生存期(PFS)主要指标和药物耐受性”

总共517名患者随机入组,其中totivozanib 260例, 索拉非尼 257例。此次研究患者的体力状态及其他预后指标与其他一线晚期肾细胞癌关键临床试验一致。

医学博士Daniel George是杜克大学前列腺癌诊所主管, 泌尿生殖肿瘤内科主任,他表示“尽管现在治疗肾癌方面取得了一些进步,患者依然需要效果更好、耐受性更好的药物。tivozanib在TIVO-1研究中显示出更好的无进展生存期及良好的耐受性,对正在接受肾癌治疗的病人来说可能向前迈进了重要的一步”。

已被报道的TIVO-1的关键性数据:(Abstract # 4501):

基于独立的影像学回顾, tivozanib在统计学意义上显著改善无进展生存期(PFS),总研究人群(意向治疗)(HR=0.797, 95% CI0.639–0.993; P=0.042)中给予tivozanib的平均生存期为11.9周,与给予索拉非尼的9.1周生存期相比,客观缓解率(ORR)为33%,而索拉非尼的客观缓解率为23%(p=0.014)。tivozanib相对于索拉非尼的疗效优势与亚组研究一致。

无既往化疗史的晚期肾细胞癌患者中(占总研究人群的70%), Tivozanib的平均生存期为12.7周,与索拉非尼9.1周的生存期相比,tivozanib具有显著改善效果(HR 0.756, 95% CI0.580–0.985; P=0.037)。这是截止到现在,关键性研究中无既往化疗晚期肾细胞癌患者的平均无进展生存期最长的。

在事先经过系统治疗包括细胞因子治疗的亚群中(占总研究人群的30%),tivozanib的平均生存期为11.9周,与索拉非尼的9.1周相比,tivozanib具有改善效果。

研究结果显示剂量减少或中断的发生率明显降低,揭示了良好的耐受性。tivozanib最常见的不良反应(占所有不良反应比例/占Ⅲ度不良反应比例)是高血压(tivozanib 44%/25%, sorafenibin为 34%/17%),索拉非尼最常见的不良反应是手足综合征(T: 13%/2% vs S: 54%/17%)。其它不良反应包括腹泻(T:22%/2% vs S: 32%/6%)、疲乏 (T: 18%/5% vs S: 16%/4%)及嗜中性白血球减少症(T:10%/2% vs S: 9%/2%).

由于不良反应导致剂量中断的发生率,tivozanib为18%,索拉非尼为35%(p<0.001)

减剂量的发生率tivozanib为14%,索拉非尼为44%(p<0.001).

总生存期的数据还不完整。TIVO-1试验中随机编入索拉非尼组的53%的病人继续接受后续治疗,这些病人中几乎所有人都在给予索拉非尼后给予tivozanib进行治疗。基于早、中期的分析,81%的这些病人总生存期达到1年。相比之下,随机编入tivozanib组的病人中只有17%的人接受后续治疗,并且77%的这些病人总生存期达到1年。完整的数据将在2013年披露。

“我们相信,tivozanib将在改善晚期肾癌治疗中发挥重要的作用”,AVEO 制药公司总裁兼CEO Tuan Ha-Ngoc表示,“与我们的合作伙伴安斯泰来一起,我们期待后面的药品注册进展,继续为tivozanib的上市做好准备”

“基于上述数据,我们期待与AVEO一起推动tivozanib在肾癌领域的应用”,安斯泰来制药公司全球发展部经理,医学博士Steven Ryder表示,“这些数据更加支持了安斯泰来成为肿瘤学领先的目标,安斯泰来致力于发展基于创新、以研发为导向策略以及动态合作伙伴关系的全球一流肿瘤学平台。”

摘要号:4501

题目:Tivozanib versus sorafenib as initial targeted therapy for patients with advanced renal cell carcinoma: Results from a phase III randomized, open-label, multicenter trial.

对比Tivozanib和索拉非尼作为晚期肾癌患者起始靶向治疗:一项随机开放多中心III期试验。

摘要:

Background:
Tivozanib, a potent, selective, long half-life tyrosine kinase inhibitor targeting all three VEGF receptors, showed activity and tolerability in a Phase II trial (JCO 2011;29[18S]:4550).

Methods: Patients (pts) with clear cell advanced renal cell carcinoma (RCC), prior nephrectomy, RECIST-defined measurable disease, and Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 were randomized 1:1 to tivozanib (T) 1.5 mg once daily for 3 weeks (wks) followed by 1 wk rest, or sorafenib (S) 400 mg twice daily continuously in a 4-wk cycle. Pts were treatment na??ve or received no more than 1 prior systemic therapy for metastatic disease; pts receiving prior VEGF- or mTOR-targeted therapy were excluded. The primary endpoint was progression-free survival (PFS) per blinded, independent radiological review. 500 pts were to be enrolled to observe 310 events, yielding 90% power to detect medians of 9.7 and 6.7 months (m) with 5% type I error (2-sided).

Results: A total of 517 pts were randomized to T (n=260) or S (n=257). Demographics were well balanced between the 2 groups, except ECOG 0 (T: 45% vs S: 54%, p=0.035). Median PFS was 11.9 m for T vs 9.1 m for S (HR=0.797, 95% CI 0.639–0.993; p=0.042). In the treatment-na??ve stratum (70% of pts enrolled in each arm), the median PFS was 12.7 m for T vs 9.1 m for S (HR 0.756, 95% CI 0.580–0.985; p=0.037). In all pts, objective response rate (ORR) for T was 33% vs 23% for S (p=0.014). The most common adverse event (AE; all grades/≥grade 3) for T was hypertension (T: 46%/26% vs S: 36%/18%) and for S was hand-foot syndrome (T: 13%/2% vs S: 54%/17%). Other important AEs included diarrhea (T: 22%/2% vs S: 32%/6%), fatigue (T: 18%/5% vs S: 16%/4%), and neutropenia (T: 10%/2% vs S: 9%/2%). Patient-reported outcome data are being analyzed. Overall survival data are not mature.

Conclusions: Tivozanib demonstrated significant improvement in PFS and ORR compared with sorafenib as initial targeted treatment for advanced RCC. The safety profile of tivozanib is favorable, and includes a low incidence of fatigue, diarrhea, myelosuppression, and hand-foot syndrome.

编辑: xy 作者:丁香园通讯员

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