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您所在的位置:首页 > 肿瘤科医学进展 > [ASCO2015]PEGPH20+Nab+Gem改善某些胰腺癌患者生存

[ASCO2015]PEGPH20+Nab+Gem改善某些胰腺癌患者生存

2015-05-27 23:20 阅读:3000 来源:医脉通 作者:林* 责任编辑:林夕
[导读] 2015年ASCO年会将于5月29日—6月2日在美国芝加哥召开。5月31日上午的消化系统(非结直肠)肿瘤口头报告专场,会发表一项在IV期,未经治疗的胰腺癌高-HA肿瘤患者中,将PEGPH20加入白蛋白结合型紫杉醇/吉西他滨的II期研究结果。

    2015年ASCO年会将于5月29日—6月2日在美国芝加哥召开。5月31日上午的消化系统(非结直肠)肿瘤口头报告专场,会发表一项在IV期,未经治疗的胰腺癌高-HA肿瘤患者中,将PEGPH20加入白蛋白结合型紫杉醇/吉西他滨的II期研究结果。整理如下:

    胰腺癌(PDA)较差的预后部分与肿瘤间质限制性化疗灌注有关。PDAs透明质酸(HA)高水平表达,有助于升高组织间隙压力。聚乙二醇化重组人透明质酸酶,PEGPH20,消耗了肿瘤中的HA.在一项PEGPH20+吉西他滨(Gem)的Ib期研究中,与HA低的肿瘤患者(pts)相比较,HA高的肿瘤患者会有改善的ORR,PFS和OS.

    研究方法:

    这是一项正在进行的II期,开放标签,随机研究,在之前未经治疗的IV期胰腺癌患者中,将PEGPH20+白蛋白结合紫杉醇(Nab)+Gem(PAG)和Nab+Gem进行比较。患者接受PEGPH20 3?g/kg,每周两次(Cycle 1),然后每周一次(Cycle 2+),联合标准剂量的AG.HA状态进行回顾性检查。主要终点是PFS,次要终点包括:ORR,OS和安全性。由于暂时的临床搁置,ORR是来自2014年4月的数据;PFS是一直到2014年12月的数据。

    研究结果:

    146例患者入组,135例患者接受至少一种研究药物剂量。平均年龄是65.1岁(范围29——83岁),93%出现≥80的KPS.最常见与研究药物(PAG vs AG)相关的不良事件是:疲劳(68% vs 69%),恶心(55% vs 44%),贫血(42% vs 53%),外周水肿(58% vs 31%),以及肌肉痉挛(55% vs 2%)。血栓栓塞(TE)事件呈现不平衡(42% vs 25%),这些患者中至少发生一例TE事件。总的RR和PFS如下表所示。
 



    结论:

    PEGPH20+Nab/Gem在晚期胰腺癌中一般耐受性良好。HA高的肿瘤患者接受PAG,与接受AG治疗相比较,会有较大的ORR和较长的PFS.总生存期将在会议期间提交。临床试验信息:NCT01839487.

    阅读原文摘要

    High response rate and PFS with PEGPH20 added to nab-paclitaxel/gemcitabine in stage IV previously untreated pancreatic cancer patients with high-HA tumors: Interim results of a randomized phase II study.(Abstract 4006)Authors:Sunil R. Hingorani, William Proctor Harris,et al.

    Session Type:Oral Abstract Session

    Background: Poor outcomes in pancreatic cancer (PDA) are associated in part with tumor stroma limiting chemotherapy perfusion. PDAs express high levels of hyaluronan (HA), which contributes to elevated interstitial pressures. PEGylated recombinant human hyaluronidase, PEGPH20, depletes HA in tumors. In a Phase Ib study of PEGPH20 with Gemcitabine (Gem), patients (pts) whose tumors were HAhigh had improved ORR, PFS and OS compared to those with tumors that were HALow.

    Methods: This is an ongoing phase II, open-label, randomized study of PEGPH20 +Nab-Paclitaxel (Nab) + Gem (PAG) vs. Nab + Gem (AG) in previously untreated pts with Stage IV PDA. Pts receive 3 ?g/kg twice weekly (Cycle 1) and then weekly (Cycle 2+) PEGPH20 in combination with standard dosing of AG. HA status was tested retrospectively. Primary endpoint is PFS, secondary endpoints include: ORR, OS and Safety. Due to a temporary clinical hold, ORR is from data through April 2014; and PFS is data through December 2014.

    Results: 146 pts were enrolled and 135 pts received at least one dose of study drug. The mean age was 65.1 yrs. (Range 29-83 yrs), 93% had a KPS of ≥ 80. The most common AEs related to study drugs (PAG vs. AG) were: fatigue (68% vs. 69%), nausea (55% vs. 44%), anemia (42% vs. 53%) pe**heral edema (58% vs. 31%) and muscle spasms (55% vs. 2%)。 There was an imbalance of thromboembolic (TE) events with 42% vs. 25% of subjects having at least one TE event. Overall RR and PFS are shown in the table below.
 



    Conclusions: PEGPH20 + Nab/Gem is generally well tolerated in advanced PDA. Patients with HAhigh tumors receiving PAG had greater ORR and longer PFS than HAhigh patients receiving AG. Overall survival will be presented at the time of the meeting. ClinicalTrials.gov Identifier NCT01839487. Clinical trial ***rmation: NCT01839487


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