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:Haploidentical Hematopoietic Cell Transplantation Using TCR Alpha/Beta and CD19 Depletion
Haploidentical Hematopoietic Cell Transplantation Using TCR Alpha/Beta and CD19 Depletion
这是一项分期未标注的注册临床试验,评估细胞治疗用于急性淋巴细胞白血病、急性髓系白血病、骨髓增生异常综合征的安全性、可行性及初步疗效。当前状态:进行中(不再招募)。计划入组 3 例。试验地点:美国 · 休斯顿(共 2 个中心)。登记号:NCT05236764。
不限性别 · ≤ 55 Years
纳入标准: 1. 无合适的常规供者(HLA 10/10相合的亲属或非亲属供者),或疾病进展迅速、无法等待寻找HLA相合的非亲属供者。此处不包括脐带血单位(CBU)可用的情况。 2. Lansky/Karnofsky评分>50。 3. 已签署书面知情同意书。 4. 确诊以下任一疾病:危及生命的血液系统恶性肿瘤,包括首次完全缓解期(CR1)的高危急性淋巴细胞白血病(ALL)、第二次或后续缓解期(≥CR2)的ALL、CR1期高危急性髓系白血病(AML)、第二次或后续缓解期的AML、骨髓增生异常综合征(MDS)、第二次或后续缓解期(≥CR2)的非霍奇金淋巴瘤(NHL)、慢性髓性白血病(CML);噬血细胞性淋巴组织细胞增多症(HLH),包括家族性、复发性或中枢神经系统(CNS)HLH;原发性免疫缺陷病(PID);血红蛋白病,包括地中海贫血或镰状细胞病(SCD);免疫抑制治疗无效的重型再生障碍性贫血(SAA);无恶性克隆演变(MDS、AML)的先天性/遗传性血细胞减少症,包括范可尼贫血(FA);其他遗传性骨髓衰竭综合征(IBMFS);易发生T细胞或NK细胞恶性肿瘤的重症慢性活动性EB病毒感染(SCAEBV)。 注:高危ALL或AML指具有特定生物学特征、提示常规化疗失败可能性高的急性白血病。随着常规化疗改善,高危疾病的生物学特征定义也会变化,因此不进一步具体界定;高危ALL/AML由主治医生判定。 排除标准: 1. 预期生存期≤6周。 2. 入组时因既往异基因移植而存在>Ⅱ级急性GVHD或广泛型慢性GVHD。 3. 入组时因既往异基因移植仍在接受GVHD免疫抑制治疗。 4. 有症状的心脏病,或左心室短轴缩短率<25%或射血分数<40%。 5. 重度肾病,肌酐清除率<40 cc/1.73 m²。 6. 既往存在重度限制性肺病,FVC<预计值的40%。 7. 重度肝病,ALT/AST≥ULN的2.5倍或胆红素≥ULN的1.5倍。 8. 严重的并发且未控制的躯体疾病或精神疾病。 9. 妊娠或哺乳期女性。 10. 入组时存在活动性病毒或真菌感染,且主要研究者评估认为会妨碍清髓性化疗或成功移植。 11. 活动性HIV感染。 12. 严重人格障碍或精神疾病,妨碍遵守研究要求。
Inclusion Criteria: 1. Lack of suitable conventional donor (10/10 HLA matched related or unrelated donor) or presence of rapidly progressive disease not permitting time to identify an HLA-matched unrelated donor. This does not include cord blood unit (CBU) availability. 2. Lansky/Karnofsky score \> 50 3. Signed written informed consent 4. Diagnosis of one of the following: 1. Patient with life threatening hematological malignancy including "high-risk" ALL in first complete remission (CR1); ALL in second or subsequent remission (greater than or equal to CR2); high-risk AML in CR1; AML in second or subsequent CR; myelodysplastic syndromes (MDS); non-Hodgkin's lymphomas (NHL) in second or subsequent remission (greater than or equal to CR2); CML 2. Hemophagocytic Lymphohistiocytosis (HLH) including familial HLH, relapsed HLH or central nervous system (CNS) HLH 3. Primary Immunodeficiency Disorders (PID) 4. Hemoglobinopathies including thalassemia or sickle cell disease (SCD) 5. Severe aplastic anemia (SAA) not responding to immune suppressive therapy 6. Congenital/hereditary cytopenias including Fanconi anemia (FA) without malignant clonal evolution (MDA, AML) 7. Other inherited bone marrow failure syndromes (IBMFS) 8. Sever chronic active Epstein Barr virus infection (SCAEBV) with predilection for T-or NK-cell malignancy NOTE: 'High risk' ALL or AML refers to those acute leukemias identified by the presence of specific biologic features, which predict high likelihood of failure to conventional chemotherapy. As biologic features of high-risk disease evolve with improvement of conventional chemotherapy, it is not practical to define this indication with any further specificity. Therefore, high risk AML/ALL will be determined by the primary physician. Exclusion Criteria: 1. Life expectancy of less than or equal to 6 weeks 2. Greater than grade II acute graft versus host disease (GVHD) or chronic extensive GVHD due to a previous allograft at the time of inclusion 3. Subject receiving an immunosuppressive treatment for GVHD treatment due to a previous allograft at the time of inclusion 4. Symptomatic cardiac disease or left ventricular shortening fraction less than 25% or ejection fraction \< 40% 5. Severe renal disease, with creatinine clearance \< 40cc/1.73m2 6. Pre-existing severe restrictive pulmonary disease, FVC \< 40% of predicted 7. Severe Hepatic Disease with ALT/AST ≥ x 2.5 upper limit of normal or bilirubin level ≥ x 1.5 upper limit of normal 8. Serious concurrent uncontrolled medical disorder or mental illness 9. Pregnant or breastfeeding female subject 10. Current active infectious disease including viral and fungal diseases at the time of enrollment; that on evaluation of PI precludes ablative chemotherapy or successful transplantation 11. Active HIV infection 12. Severe personality disorder or mental illness that would preclude compliance with the study
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:Cumulative Incidence of Neutrophil Engraftment and Platelet Engraftment · Cumulative incidence of neutrophil and platelet engraftment (composite measure) will be reported as rate and its associated 95% confidence interval. Competing risks methods will be utilized, with graft failure and death considered as competing risks.
Neutrophil engraftment is defined as the first of 3 consecutive days with a peripheral blood absolute neutrophil count of ≥ 0.5x10\^9/L
Platelet engraftment is defined as the first day with platelet count of ≥ 20 x10\^9/L without transfusion support for 7 consecutive days · 42 days post-HCT;Cumulative Incidence of Grade III or Higher Acute GVHD · Cumulative incidence of grade III or higher acute GVHD among patients who achieve engraftment will be reported as rate and its associated 95% confidence interval. Competing risks methods will be utilized, with death considered the competing risk. · 100 days post-HCT
次要终点:Cumulative Incidence of Transplant-related Mortality (TRM);Overall Survival (OS);Cumulative Incidence of Chronic Graft Versus Host Disease
患者接受供者干细胞移植,移植前进行预处理(化疗,可联合或不联合放疗);研究者将对用于移植的供者血细胞进行特殊处理。
需要接受异基因造血细胞移植(allo-HCT)的患者有发生移植物抗宿主病(GVHD)的风险,该并发症可能导致较高的发病率和死亡率。本Ⅰ/Ⅱ期研究将检验造血细胞移植的安全性和疗效:移植前在体外去除T细胞受体α/β阳性细胞及CD19阳性细胞,以治疗患者的基础疾病。预计该处理可显著降低GVHD风险,从而使移植后免用免疫抑制治疗成为可能。研究使用从父母或其他半相合亲属供者外周血采集的血液干/祖细胞,并采用尚属研究性器械的CliniMACS® TCRα/β-Biotin系统进行处理。
Patients with medical conditions requiring allogeneic hematopoietic cell transplantation (allo-HCT) are at risk of developing a condition called graft versus host disease (GvHD) which carries a high morbidity and mortality. This is a phase I/II study that will test the safety and efficacy of hematopoietic cell transplantation (HCT) with ex-vivo T cell receptor Alpha/Beta+ and CD19 depletion to treat patients' underlying condition. This process is expected to substantially decrease the risk of GvHD thus allowing for the elimination of immunosuppressive therapy post-transplant. The study will use blood stem/progenitor cells collected from the peripheral blood of parent or other half-matched (haploidentical) family member donor. The procedure will be performed using CliniMACS® TCRα/β-Biotin System which is considered investigational.
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