Phase I/II evaluation of RV1001, a novel PI3Kδ inhibitor, in spontaneous canine lymphoma.

Phase I/II evaluation of RV1001, a novel PI3Kδ inhibitor, in spontaneous canine lymphoma.
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DOI:
10.1371/journal.pone.0195357
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发表时间:
2018
期刊:
影响因子:
3.7
通讯作者:
London CA
London CA
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Gardner HL;Rippy SB;Bear MD;Cronin KL;Heeb H;Burr H;Cannon CM;Penmetsa KV;Viswanadha S;Vakkalanka S;London CA

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RV1001 是一种新型、有效、选择性的 PI3Kδ 抑制剂。本研究的目的是评估 RV1001 在犬非霍奇金淋巴瘤 (NHL) 中的安全性和有效性。通过蛋白质印迹法测定原代犬 NHL 细胞中 RV1001 对内源性 pAKT 的抑制作用。 RV1001 的 I 期研究在 21 只患有初治和耐药 T 和 B 细胞 NHL 的狗中进行,以评估安全性、药代动力学特征和对治疗的反应。客观缓解率为 62%(完全缓解 (CR) n = 3;部分缓解 (PR) n = 10),并且在初治和化疗耐药的 B 和 T 细胞 NHL 中均观察到缓解。这项研究为一项 II 期、非关键、探索性、开放标签多中心临床试验提供了推荐的起始剂量,该试验在 35 只患有初治和耐药 T 和 B 细胞 NHL 的狗中进行,以进一步确定 RV1001 的疗效和安全性。 II 期研究的客观缓解率为 77%(CR n = 1;PR n = 26)。临床毒性主要是肝胆和胃肠道毒性,并且对剂量调整和/或暂时停药有反应。肝毒性是主要的剂量限制性毒性。 RV1001 在患有 B 细胞和 T 细胞 NHL 的狗中表现出良好的口服生物利用度、可接受的安全性以及与 pAKT 相关抑制的生物活性。这些研究的数据可用于帮助设计未来涉及人类异构体选择性 PI3K 抑制剂的研究。
RV1001 is a novel, potent, and selective PI3Kδ inhibitor. The purpose of this study was to evaluate the safety and efficacy of RV1001 in canine Non-Hodgkin lymphoma (NHL). Inhibition of endogenous pAKT by RV1001 in primary canine NHL cells was determined by Western blotting. A phase I study of RV1001 was performed in 21 dogs with naïve and drug resistant T and B-cell NHL to assess safety, pharmacokinetic profile, and response to therapy. The objective response rate was 62% (complete response (CR) n = 3; partial response (PR) n = 10), and responses were observed in both naïve and chemotherapy-resistant B and T cell NHL. This study provided the recommended starting dose for a phase II, non-pivotal, exploratory, open label multi-centered clinical trial in 35 dogs with naïve and drug resistant T and B-cell NHL, to further define the efficacy and safety profile of RV1001. The objective response rate in the phase II study was 77% (CR n = 1; PR n = 26). Clinical toxicities were primarily hepatobiliary and gastrointestinal, and were responsive to dose modifications and/or temporary drug discontinuation. Hepatotoxicity was the primary dose limiting toxicity. RV1001 exhibits good oral bioavailability, an acceptable safety profile, and biologic activity with associated inhibition of pAKT in dogs with B and T cell NHL. Data from these studies can be leveraged to help inform the design of future studies involving isoform-selective PI3K inhibitors in humans.
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