Br J Cancer:ADI-PEG20联合顺铂治疗转移性恶性实体瘤

2021-03-05 xiaozeng MedSci原创

既往研究显示,

既往研究显示,癌细胞可能会通过代谢重编程来克服其快速增殖所需要的能量。这些癌细胞中产生的异常代谢通路或可成为癌症治疗的潜在治疗靶标。

精氨酸是一种半必需氨基酸,其能够参与调控多种细胞过程,如细胞信号转导、细胞增殖、血管舒张和激素的合成。精氨酸在免疫系统调节中也起着至关重要的作用。


大多数正常人细胞通过两种关键酶合成精氨酸。然而,某些癌细胞缺乏必要的酶促途径,因此必须从血液中获取精氨酸才能正常生长和存活。因此,在患有精氨酸营养缺陷型肿瘤的患者中,消耗血液中精氨酸可以控制肿瘤的生长,并导致细胞的死亡。

既往研究显示,精氨酸耗竭会干扰嘧啶的代谢和DNA损伤修复通路。ADI-PEG20联合顺铂治疗可以增强精氨酸营养缺陷型的细胞毒性。


该单中心的1期临床试验采用了3+3剂量递增方案,旨在评估ADI-PEG20的安全性、耐受性并确定2期的推荐剂量(RP2D)。

联合治疗队列的生存曲线分析

研究人员招募了99例转移性ASS1(精氨酸琥珀酸酯合成酶1)缺陷型恶性肿瘤患者。结果显示,并没有观察到剂量限制的毒性作用或与治疗相关的死亡发生。3%的患者由于药物毒性而中止治疗。


接受治疗后,有5%(5/99)的患者出现部分响应,而41%的患者病情稳定。患者的中位无进展生存期和总生存期分别为3.62和8.06个月。大多数患者分别在第24周和第8周出现持续大量的精氨酸耗竭和瓜氨酸水平的升高。在第8周和第16周,患者的肿瘤应答与抗ADI-PEG20抗体的水平相关。

联合治疗队列的药效学结果

总而言之,该研究结果揭示,同时服用的ADI-PEG20和顺铂具有可接受的安全性,且已显示出对转移性ASS1缺陷型实体瘤的抗肿瘤活性。因此需要进一步的评估该治疗组合的效果。


原始出处:

Yao, S., Janku, F., Subbiah, V. et al. Phase 1 trial of ADI-PEG20 plus cisplatin in patients with pretreated metastatic melanoma or other advanced solid malignancies. Br J Cancer (05 March 2021).

 

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    2021-10-07 feather89
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    2021-03-07 wleon8899
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    2021-03-06 随梦飞扬

    同时服用的ADI-PEG20和顺铂具有可接受的安全性,且已显示出对转移性ASS1缺陷型实体瘤的抗肿瘤活性。因此需要进一步的评估该治疗组合的效果。

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