a study evaluating ucart019 in patients with relapsed or refractory cd19+ leukemia and lymphoma

Conditions: B Cell Leukemia; B Cell Lymphoma

Summary: autologous t cells engineered to express chimeric antigen receptors (cars) against leukemia antigens such as cd19 on b cells have shown promising results for the treatment of relapsed or refractory b-cell malignancies. however, a subset of cancer patients especially heavily pretreated cancer patients could be unable to receive this highly active therapy because of failed expansion. moreover, it is still a challenge to manufacture an effective therapeutic product for infant cancer patients due to their small blood volume. on the other hand, the inherent characters of autologous car-t cell therapy including personalized autologous t cell manufacturing and widely "distributed" approach result in the difficulty of industrialization of autologous car-t cell therapy. universal cd19-specific car-t cell(ucart019),derived from one or more healthy unrelated donors but could avoid graft-versus-host-disease (gvhd) and minimize their immunogenicity, is undoubtedly an alternative option to address above-mentioned issues. we have generated gene-disrupted allogeneic cd19-directed bbζ car-t cells (termed ucart019) by combining the lentiviral delivery of car and crispr rna electroporation to disrupt endogenous tcr and b2m genes simultaneously and will test whether it can evade host-mediated immunity and deliver antileukemic effects without gvhd. the main goal of the phase 1 portion of this phase 1/2 trial is to evaluate the safety and tolerability of several doses of ucart019 in patients with relapsed or refractory cd19+ leukemia and lymphoma, so as to establish the recommended dose and/or schedule of ucart019 for phase 2 portion. the recommended phase 2 dose will be defined as the highest dose level of ucart019 that induced dlt in fewer than 33% of patients (i.e., one dose level below that which induced dlt in at least two of six patients). phase 2 portion of the trial will not be initiated until the recommended phase 2 dose is determined. in the phase 2 portion of this trial, we will mainly determine if ucart019 help the body's immune system eliminate malignant b-cells. safety of ucart019 and impact of this treatment on survival will also be observed.

primary objectives: 1. to evaluate the feasibility and safety of ucart019 in patients with relapsed or refractory cd19+ leukemia and lymphoma. 2. to evaluate the duration of in vivo persistence of adoptively transferred t cells, and the phenotype of persisting t cells. real time polymerase chain receptor (rt-pcr) analysis of peripheral blood(pb), bone marrow(bm) and lymph node will be used to detect and quantify survival of ucart019 over time. secondary objectives: 1. for patients with detectable disease, measure anti-tumor response due to ucart019 cell infusions. 2. determine if cellular or humoral host immunity develops against the murine anti-cd19, and assess correlation with loss of detectable ucart019 (loss of engraftment). outline: this is a phase i, dose-escalation study of allogeneic cd19 car-t-cells followed by a phase ii study. the ucart019 will be administered by i.v. injection over 20-30 minutes as a using a "split dose" approach to dosing: 10% on day 0, 30% on day 1 and 60% on day 2.

Eligibility criteria:
inclusion criteria: 1. male or female participant 2. 12 years to 75 years (infant, child, adult, senior) 3. patient with relapsed or refractory cd19 positive b-cell leukemia or lymphoma 4. estimated life expectancy ≥ 12 weeks (according to investigator's judgement) 5. eastern cooperative oncology group (ecog) performance status ≤ 2 6. adequate organ function exclusion criteria: 1. prior malignancy, except carcinoma in situ of the skin or cervix treated with curative intent and with no evidence of active disease 2. diagnosis of burkitt's leukemia/lymphoma according to who classification or chronic myelogenous leukemia lymphoid blast crisis 3. richter's syndrome 4. presence of grade ii-iv (glucksberg) or b-d (ibmtr) acute or extensive chronic gvhd at the time of screening 5. subjects with any autoimmune disease or any immune deficiency disease or other disease in need of immunosuppressive therapy 6. severe active infection (uncomplicated urinary tract infections, bacterial pharyngitis is allowed), prophylactic antibiotic, antiviral and antifungal treatment is permissible 7. active hepatitis b, active hepatitis c, or any human immunodeficiency virus (hiv) infection at the time of screening 8. patient has an investigational medicinal product within the last 30 days prior to screening 9. previous treatment with investigational gene or cell therapy medicine products 10. concurrent use of systemic steroids. recent or current use of inhaled steroids is not exclusionary 11. pregnant or nursing women

Keywords: car-t cancer treatment immunotherapy adoptive cell therapy chimeric antigen receptor universal car-t