CD19-Directed Chimeric Antigen Receptor CD19 Redirected Autologous T Cells (CART19) for Orphan Indications of Pediatric B Cell Acute Lymphoblastic Leukemia (B ALL)
This is an open-label, four-cohort, phase 2 study to determine the efficacy of CART19 in pediatric and young adult patientswith hypodiploid (Cohort A) or t(17;19) B-ALL (Cohort B), infants with very high risk KMT2A B-ALL (Cohort C), and in patients with central nervous system (CNS) relapse who did not receive cranial radiation (XRT) or bone marrow transplantation (BMT) (Cohort D).
• Signed informed consent form must be obtained prior to any study procedure.
• Male and female patients with documented CD19+ B-ALL
• a.Cohort A \& B: Patients, regardless their response to initial or relapsed B ALL therapy, with the following characteristics: i.Cohort A: Subjects with confirmation of a hypodiploid karyotype (chromosome number fewer than 45) ii.Cohort B: Subjects with cytogenetic confirmation of the chromosomal translocation t(17;19) (Cohort B) b.Cohort C: Infants w/ newly diagnosed KMT2A rearranged B-ALL classified as very high risk by the following criteria: i.Age \< 3 months at diagnosis ii.Age \< 6 months and WBC \> 300,000x109/L at diagnosis or a poor prednisone response in induction iii.MRD positive \> 0.01 (or PCR \> 104) after 2 courses of standard infant ALL therapy.
• c.Cohort D: Subjects in a first or greater CNS relapse, prior to therapy with cranial XRT or HSCT for the current relapse
• Documentation of CD19 tumor expression in bone marrow, peripheral blood, CSF, or tumor tissue.
• Age 0 to 29 years
• Adequate organ function defined as:
‣ A serum creatinine based on age/gender as follows:
‣ Maximum Serum Creatinine (mg/dL) Age Male Female 0 to \< 2 years 0.6 0.6 2 to \< 6 years 0.8 0.8 6 to \< 10 years 1.0 1.0 10 to \< 13 years 1.2 1.2 13 to \< 16 years 1.5 1.4
‣ ≥ 16 years 1.7 1.4
⁃ Adequate liver function:
• i.ALT≤ 5 x ULN; ALT ii.Total bilirubin ≤ 3 x ULN iii.ALT and/or bilirubin results that exceed this range are acceptable if, in the opinion of the physician-investigator (or as confirmed by liver biopsy), the abnormalities are directly related to ALL infiltration of the liver.
• c.Must have a minimum level of pulmonary reserve defined as ≤ Grade 1 dyspnea and \< Grade 3 hypoxia; DLCO ≥ 40% (corrected for anemia) if PFTs are clinically appropriate as determined by the physician-investigator.
• d.Left Ventricular Shortening Fraction (LVSF) ≥ 28%, or Left Ventricular Ejection Fraction (LVEF) ≥ 45% by echocardiogram. In cases where quanitative assessment of LVSF/LVEF is not possible, a statement by the cardiologist that the ECHO shows qualititatively normal ventricular function wll suffice.
• Adequate performance status defined as Lansky or Karnofsky score ≥ 50
• Subjects of reproductive potential must agree to use acceptable birth control methods