治疗复发/难治性大b细胞淋巴瘤(crc01-01)的抗肿瘤素(pd-1和tigit敲低cd19 car-t)

IF 3.3 4区 医学 Q2 HEMATOLOGY
W. S. Kim, S. J. Kim, D. H. Yoon, H. W. Cho, S. E. Yoon, D. H. Yang, H. Shin, H. S. Eom, E. Y. Lee, J. M. Byun, Y. I. Koh, D. Y. Shin, J. Hong, H. W. Lee, J. H. Jung, S. S. Yoon, G. Y. Song, D. Y. Kim
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引用次数: 0

摘要

anbal - cell是CD19 CAR-T结合PD-1、TIGIT敲低以减少对应答的负面影响。这种方法有望对肿瘤细胞产生更强、更持久的作用。方法:在这项多中心2期临床试验中,我们招募了复发或难治性大b细胞淋巴瘤的成年患者,包括DLBCL-NOS、HGBL、PMBCL、FL3B。淋巴细胞清除用环磷酰胺500 mg/m2和氟达拉滨30 mg/m2,给药3天(-5、-4、-3天)。中位剂量为2.2 ×106cells/kg(范围0.2-2.61 (×106cells/kg))。主要终点是独立审查委员会的ORR。次要终点是PFS、OS和安全性。结果:在2022年1月至2023年9月期间,91例患者接受了白细胞分离制造,79例患者接受了anbal- cell。以DLBCL、NOS居多(94.9%),65岁及以上占53.2%。接受过二线化疗的患者占70.9%。IPI得分分布为:低31.6%,中低25.3%,中高34.2%,高8.9%。SPD中位数为1858 mm2(范围150 - 13724),TMTV中位数为63.3 ml(范围0-3603)。26.3%的患者为GCB表型,61.8%的患者为双表达者。73例患者纳入疗效分析组。ORR为75.3%,CR为67.1%。中位f/u时间为8.5个月(范围0.2-22.6)。中位PFS为6.0个月(95% CI: 4.3-16.5个月),12个月和18个月的PFS率分别为41.1%和35.2%。中位OS未达到,12个月和18个月OS率分别为66.6%和57.3%。关于CAR-T细胞扩增,反应组的扩增峰(中位数Cmax: 22,281拷贝/µg)明显高于非反应组(中位数Cmax: 9781拷贝/µg)。根据患者在6个月时是否维持CR,我们将患者分为长期反应者(LR)和非长期反应者(non-LR)。FACS分析显示,与非LR组相比,LR组anbal-cel上PD-1和TIGIT的表达显著降低,这种差异持续到第14天。此外,与非LR组相比,LR组的CAR-T细胞表现出较少的激活记忆表型,其特征是CD39和Tim-3的表达较低,CD127的表达较高。与此一致的是,非lr组表现出终末分化和功能衰老的CAR-T细胞的频率增加,以CD57、CD38和HLA-DR的表达为标志。CRS和神经系统事件发生率分别为57.0%和13.9%。3级CRS发生率为8.9%,没有4级病例。3级及以上的神经系统事件发生率为3.8%。严重感染率为25%,44%的患者报告了长期的细胞减少。结论:Anbal-cel显示PD-1和TIGIT敲低可以促进长期缓解,具有高CR率和可控的安全性。关键词:细胞疗法;侵袭性b细胞非霍奇金淋巴瘤潜在利益冲突来源:S. KimOther报酬:在提交的工作之外,获得赛诺菲、百济神州、博宁、罗氏、协和麒麟、东亚的资助。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ANBALCABTAGENE AUTOLEUCEL (PD-1 AND TIGIT KNOCKDOWN CD19 CAR-T) FOR RELAPSED/REFRACTORY LARGE B-CELL LYMPHOMA (CRC01-01)

Introduction: Anbal-cel is CD19 CAR-T with PD-1, TIGIT knockdown to reduce the negative impact on response. This approach is expected to exert a stronger and more sustained effect on tumor cells.

Methods: In this multicenter, phase 2 trial, we enrolled adult patients with relapsed or refractory large B-cell lymphomas including DLBCL-NOS, HGBL, PMBCL, FL3B. Lymphodepletion was performed with cyclophosphamide 500 mg/m2 and fludarabine 30 mg/m2, administered for three days (-5, -4, -3 days). The median dose was 2.2 ×106cells/kg (range, 0.2–2.61 (×106cells/kg)). The primary endpoint is ORR by independent review committee. The secondary endpoints are PFS, OS and safety.

Results: Between January 2022 and September 2023, 91 patients underwent leukapheresis to manufacture and 79 patients received anbal-cel. Most patients were DLBCL, NOS (94.9%) and 65 years or older accounted for 53.2%. The patients who had received up to second-line chemotherapy was 70.9%. The IPI score was distributed as follows: low in 31.6%, low-intermediate in 25.3%, high-intermediate in 34.2%, high in 8.9%. The median SPD was 1858 mm2 (range, 150–13,724), and the median TMTV was 63.3 ml (range, 0–3603). 26.3% of patients had GCB phenotype, and 61.8% were classified as double expressors.

73 patients included in an efficacy analysis set. The ORR was 75.3% and CR rate was 67.1%. The median f/u time was 8.5 months (range, 0.2–22.6). The median PFS was 6.0 months (95% CI: 4.3–16.5 months), with 12-month and 18-month PFS rates of 41.1% and 35.2%, respectively. The median OS was not reached, and the 12-month and 18-month OS rates were 66.6% and 57.3%, respectively. Regarding CAR-T cell expansion, the responder group exhibited a significantly higher peak expansion (median Cmax: 22,281 copies/µg) compared to the non-responder group (median Cmax: 9781 copies/µg).

We categorized patients into long-term responders (LR) and non-long-term responders (non-LR) based on whether they maintained CR at 6 months. FACS analysis showed that PD-1 and TIGIT expression on anbal-cel was significantly lower in the LR group compared to the non-LR group, with this difference persisting at days 14. Additionally, CAR-T cells in the LR group displayed a less activated memory phenotype, characterized by lower expression of CD39 and Tim-3 and higher expression of CD127, compared to those in the non-LR group. Consistent with this, the non-LR group exhibited an increased frequency of terminally differentiated and functionally senescent CAR-T cells, marked by the expression of CD57, CD38, and HLA-DR.

CRS and neurologic events occurred in 57.0% and 13.9%, respectively. Grade 3 CRS occurred in 8.9% with no cases of grade 4. Neurologic events of grade 3 or higher were reported in 3.8%. The rate of serious infections was 25%, prolonged cytopenia was reported in 44% of patients.

Conclusions: Anbal-cel demonstrated PD-1 and TIGIT knockdown can contribute to long-term response with high CR rate and manageable safety profile.

Keywords: cellular therapies; aggressive B-cell non-Hodgkin lymphoma

Potential sources of conflict of interest:

W. S. Kim

Other remuneration: received grants from Sanofi, BeiGene, Boryong, Roche, Kyowa Kirin, Donga, outside the submitted work.

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来源期刊
Hematological Oncology
Hematological Oncology 医学-血液学
CiteScore
4.20
自引率
6.10%
发文量
147
审稿时长
>12 weeks
期刊介绍: Hematological Oncology considers for publication articles dealing with experimental and clinical aspects of neoplastic diseases of the hemopoietic and lymphoid systems and relevant related matters. Translational studies applying basic science to clinical issues are particularly welcomed. Manuscripts dealing with the following areas are encouraged: -Clinical practice and management of hematological neoplasia, including: acute and chronic leukemias, malignant lymphomas, myeloproliferative disorders -Diagnostic investigations, including imaging and laboratory assays -Epidemiology, pathology and pathobiology of hematological neoplasia of hematological diseases -Therapeutic issues including Phase 1, 2 or 3 trials as well as allogeneic and autologous stem cell transplantation studies -Aspects of the cell biology, molecular biology, molecular genetics and cytogenetics of normal or diseased hematopoeisis and lymphopoiesis, including stem cells and cytokines and other regulatory systems. Concise, topical review material is welcomed, especially if it makes new concepts and ideas accessible to a wider community. Proposals for review material may be discussed with the Editor-in-Chief. Collections of case material and case reports will be considered only if they have broader scientific or clinical relevance.
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