决定异体 CAR T 细胞排斥与扩增的细胞和分子机制
Cellular and molecular mechanisms determining allogeneic CAR T cell rejection and expansion.
我们评估了11例接受单一批次cemacabtagene ansegedleucel(cema-cel)治疗的大B细胞淋巴瘤患者,cemacabtagene ansegedleucel是一种异体抗CD19 CAR T产品。
英文原题:UCD19 CarT in Treatment of Pediatric B-ALL and B-NHL
这是一项 I/II 期注册临床试验,评估自体细胞治疗用于急性淋巴细胞白血病、非霍奇金淋巴瘤的安全性、可行性及初步疗效。当前状态:招募中。计划入组 45 例。试验地点:美国 · 奥罗拉(共 1 个中心)。登记号:NCT04544592。
不限性别 · ≥ 31 Days 且 ≤ 30 Years
纳入标准: • 符合临床白细胞单采条件,或此前已按建议规范采集并保存白细胞单采产品。 • 已取得父母/监护人(患者<18岁)、患者本人(患者>18岁)或法定授权代表(患者>18岁且缺乏决策能力)签署并注明日期的同意书。儿童患者应参与适龄讨论;在适当情况下,按机构标准取得>7岁儿童的同意。 • 愿意参加长期随访研究,并愿意遵守所有研究程序、在整个研究期间保持可联系。 • 男性,或非妊娠且非哺乳期女性。有生育能力或可能使他人受孕者,须同意从首次CAR-T细胞给药至末次研究产品给药后12个月持续采取高效避孕措施。 • 签署同意并入组时年龄31天至30岁(含)。 • B细胞来源急性淋巴细胞白血病(ALL)或非霍奇金淋巴瘤(NHL),且经流式细胞术、免疫组化或两者证实表达CD19。 队列1附加标准: • 符合以下任一项:复发≥2次;异基因骨髓移植后任何时间复发;经治疗医生判定对标准治疗难治;符合骨髓移植条件但经治疗医生判定不适合移植;或患者/家长拒绝骨髓移植并倾向CAR-T治疗。 • NHL限于弥漫大B细胞淋巴瘤、Burkitt淋巴瘤、Burkitt与弥漫大B细胞淋巴瘤之间的中间型淋巴瘤、原发纵隔B细胞淋巴瘤、滤泡性淋巴瘤、高级别B细胞淋巴瘤或转化性淋巴瘤。 队列2附加标准: • 首次复发B-ALL且符合以下任一项:初诊时存在高危基因组改变(如KMT2A重排、t(17;19)、低二倍体、Ph样突变、BCR-ABL1融合/Ph阳性ALL、iAMP21或TP53失活突变/缺失);孤立中枢神经系统复发且标准挽救治疗需包括颅脑放疗;唐氏综合征;再诱导化疗后骨髓微小残留病(MRD)阳性(流式细胞术>0.01%或二代测序检出>0个克隆序列);或年龄≥18岁。也可为新诊断病例,但巩固治疗结束时骨髓流式MRD持续≥0.01%。 • Lansky或Karnofsky体能评分≥50%。 • 无法接受或拒绝市售CD19 CAR-T治疗。 排除标准: • 研究者判断疾病快速进展,且缺乏充分挽救/桥接治疗方案。 • 活动性移植物抗宿主病(GVHD)。 • 活动性、未控制且危及生命的感染;治疗医生认为其会妨碍安全单采或耐受淋巴清除化疗、细胞输注或细胞因子释放综合征。 • 严重器官功能障碍:心肌功能异常(射血分数≤40%或短轴缩短率≤28%、超声心动图提示有临床意义的心包积液,或有临床意义的心电图异常);室内空气下基线血氧饱和度≤90%;转氨酶>ULN的10倍或胆红素>ULN的2倍(除非认为与原发疾病相关);估算肌酐清除率<60 mL/min/1.73 m²(若核医学GFR或其他更准确检测高于该值,可采用更准确结果)。 • 青春期后女性妊娠、计划妊娠,或不愿在研究期间采取避孕措施(包括禁欲)。 • 已知HIV感染、活动性乙肝或活动性丙肝。
Inclusion Criteria: * Meets clinical criteria for leukapheresis or has a leukapheresis product previously collected and stored per recommended guidelines. * Provision of signed and dated consent form from parent or guardian (patients \<18), the patient themselves (\>18), or legally authorized representative (patient \>18 who lack decision-making capacity); Pediatric patients will be included in age-appropriate discussions and assent will be obtained for those \> 7 years of age, when appropriate, according to institutional standards. * Willingness to participate in long term follow up study. * Stated willingness to comply with all study procedures and be available for the duration of the study. * Males OR non-pregnant, non-breastfeeding females. o Patients of child-bearing potential or capable of fathering a child must agree to use highly effective contraception from the time of initial CAR T cell administration though 12 months following the final administration of investigational product. * Aged 31 days to 30 years (inclusive) at time of consent and enrollment. * Acute Lymphoblastic Leukemia (ALL) OR Non-Hodgkin Lymphoma (NHL) of B-cell origin that: * Has confirmed expression of CD19 by flow cytometry, immunohistochemistry (IHC), or both. Cohort One Criteria: * Meets any one of the following conditions: * Relapsed two or more times * Relapsed at any time after allogeneic BMT * Refractory to standard therapy as determined by the treating physician * Meets criteria for BMT but is ineligible as determined by the treating physician Patient and/or parents declining BMT options and would prefer CAR-T Therapy. * Non-Hodgkin Lymphoma includes all of the following: * Diffuse large B-cell lymphoma (DLBCL) * Burkitt Lymphoma * Intermediate lymphoma between Burkitt and DLBCL * Primary Mediastinal B-cell Lymphoma (PMBL) * Follicular lymphoma * High grade B cell lymphoma * Transformed lymphoma Cohort Two Criteria: * B-ALL in first relapse with any one of the following conditions: * High-risk genomic alterations at initial diagnosis such as KMT2A gene rearrangement, t(17;19), hypodiploidy, Ph-like mutations, BCR-ABL1 fusion (Ph+ ALL), iAMP21, and TP53 inactivating mutation/deletion. * Isolated CNS relapse such that cranial radiation would be indicated as a component of standard salvage therapy. * Down syndrome. * Minimal residual disease (MRD) positivity of \> 0.01% by FACS or \> 0 clonal sequences by NGS in bone marrow post re-induction chemotherapy. * Age 18 years or older. OR Newly diagnosed with persistent MRD ≥ 0.01% by flow cytometry in bone marrow at end of consolidation. * Performance score (Lansky or Karnofsky) of 50% or better; * Unable to or declined to receive commercially available CD19 CAR-T Therapy. Exclusion Criteria: * Evidence of rapidly progressive disease without adequate salvage/bridging regimens as determined by the investigator. * Active Graft-versus-Host Disease (GvHD). * Active, uncontrolled, life-threatening infection that at the determination of the treating physician would preclude safe leukapheresis or tolerance of LD chemotherapy, cell infusion, or cytokine release syndrome. * Evidence of severe organ dysfunction as defined by: * Myocardial dysfunction: Ejection fraction ≤ 40% or shortening fraction ≤ 28%, evidence of physiologically significant pericardial effusion as determined by an echocardiogram (ECHO), and clinically significant electrocardiogram (ECG) findings. * Baseline oxygen saturation of ≤ 90% on room air * Transaminases \> 10x upper limit of normal (ULN) or bilirubin \>2x the ULN, unless thought to be related to primary disease * Estimated Cr clearance \<60 mL/min/1.73 m2 (if nuclear medicine GFR or other more specific testing exceeds this level than it can supersede the estimated clearance) * Post-pubertal females that are pregnant, planning to become pregnant, or unwilling to use birth control (includes abstinence) for the study duration. * Known HIV infection, or active Hepatitis B or active Hepatitis C infection.
以上为辅助阅读译文。是否适合入组须由主治医生判断,最终以登记平台与研究者确认为准。
主要终点:Determine the safety and tolerability of UCD19 CAR-T infusion in pediatric patients with B-ALL or B-NHL · DLTs of UCD19 CAR-T will be assessed at each of the dose levels in a standard 3+3 dose-escalation design with a determination of recommended Phase 2 dose (RP2D). · Post UCD19 infusion to Day 28;Determine the preliminary efficacy of UCD19 CAR-T cells in pediatric patients with B-ALL or B-NHL · Following determination of UCD19 CAR-T RP2D, there will be a cohort expansion to determine preliminary efficacy and biological activity by assessment of CR status. · Day 28 (for B-ALL) and Day 90 (for B-NHL) post UCD19 infusion
次要终点:Determine the preliminary efficacy of UCD19 CAR-T cells in pediatric patients with B-ALL during the expansion phase;Determine the preliminary efficacy of UCD19 CAR-T cells in pediatric patients with B-ALL during the expansion phase;Determine the preliminary efficacy of UCD19 CAR-T cells in pediatric patients with B-ALL during the expansion phase;Determine the preliminary efficacy of UCD19 CAR-T cells in pediatric patients with B-ALL during the expansion phase;Determine the preliminary efficacy of UCD19 CAR-T infusion in pediatric patients after first relapse with B-ALL during the expansion phase;Determine the preliminary efficacy of UCD19 CAR-T infusion in pediatric patients after first relapse with B-ALL during the expansion phase;Determine the preliminary efficacy of UCD19 CAR-T infusion in pediatric patients after first relapse with B-ALL during the expansion phase;Determine the preliminary efficacy of UCD19 CAR-T infusion in pediatric patients after first relapse with B-ALL during the expansion phase
先入组4–18名受试者,逐步递增治疗剂量,直至确定Ⅱ期推荐剂量(RP2D)。
最多再纳入18名受试者接受Ⅱ期推荐剂量治疗;包括Ⅰ期接受RP2D治疗者在内,每个队列计划共治疗12人。
本Ⅰ/Ⅱ期试验将研究一种新型、在本地制备的CD19靶向CAR-T疗法,目标是缩短输注等待时间并扩大可治疗人群,包括既往被排除的儿童B细胞非霍奇金淋巴瘤患者及首次复发患者。
This phase I/II trial will investigate a new CD19 directed CAR-T therapy manufactured locally with the goals to expedite infusion to wider patient inclusion that includes those who were previously excluded, such as pediatric patients with B-cell NHL and patients in primary relapse.
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