MB-CART19.1 in Patients With R/R ALL

• Status: Unknown status
• Trial end date: 2019-12-31
• Target enrollment: 0
• Participant gender: All

Summary

Precursor-B acute lymphoblastic leukemia (ALL) is the most common cancer in childhood. Despite major advances in ALL therapy, 20% of children and 40-50% of adults fail state-of-the art first-line treatment. But there is a strong need for alternative treatments to cure chemotherapy-refractory and relapsed B cell malignancies in pediatric patients. Relapsed and refractory B cell malignancies remain a therapeutic challenge, as these diseases are characterized by adverse survival. These cancers share a cell origin from the B-cell lineage and consequent surface expression of B-lineage markers such as CD19 and CD22. Chimeric antigen receptor (CAR) engineered T cell therapy has recently emerged as a new modality to target B cell malignancies. CARs couple a single-chain Fv (scFv) domain directed against a B-lineage-specific antigen to T-cell activating intracellular signaling domains. CAR gene-modified T cell interaction with target cells occurs in a HLA-independent fashion, so that a single vector can be used to treat all patients with cancers that express the target antigen. Miltenyi Biotec has established a semi-automated manufacturing process that can be made available to academic settings for systematic exploration of CAR strategies in advanced clinical studies. Closed-system operation, improved robustness, simplified work flows, and reduced labor intensity, while maintaining strict adherence to regulatory guidelines, allows for decentralized manufacturing. In the proposed phase II study, the investigator will explore autologous 2nd generation CD19 CAR T cell products in patients with relapsed and refractory disease incurable with standard therapies.

• Phase: Phase 2
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: Shanghai Children's Medical Center
• Collaborators: Miltenyi Biomedicine GmbH; Miltenyi Biotec GmbH

Criteria

Inclusion Criteria:

• Age ≤18 years (if deemed fit by treating investigator)

• CD19 expression must be detected on the malignant cells by flow cytometry.

• Patients with relapsed disease with >5% blasts in BM (M2 or M3) after at least one standard chemotherapy and one salvage regimen who are ineligible for allogeneic stem cell transplant (alloSCT)

• Patients have refractory disease activity precluding alloSCT at this time, or patients who have relapsed post alloSCT at least 100 days post-transplant, with no evidence of active GVHD, and no longer taking immunosuppressive agents for at least 30 days prior to enrollment.

• Patients with combined extramedullary ALL are eligible if extramedullary disease has been successfully cleared by conventional therapy at the time of inclusion (e.g. intrathecal chemotherapy, orchiectomy). This includes patients with combined CNS-2 (<5 WBC/µl CSF, with blasts on cytospin) or CNS-3 (5WBC/µl CSF, with blasts on cytospin) disease and patients with combined testicular relapse.

• Patients and/or parents must give their written informed consent/assent.

Exclusion Criteria:

• Rapidly progressive disease that in the estimation of live less than 12 weeks

• Isolated extramedullary relapse (CNS and/or testicular) in ALL

• Current autoimmune disease, or history of autoimmune disease with potential CNS involvement

• Active clinically significant CNS dysfunction (including but not limited to uncontrolled seizure disorders, cerebrovascular ischemia or hemorrhage, dementia, paralysis)

• History of an additional malignancy other than non-melanoma skin cancer or carcinoma in situ unless disease free for ≥3 years.

• Pulmonary function: Patients with pre-existing severe lung disease (FEV1 or FVC < 65%) or an oxygen requirement of >28% O2 supplementation or active pulmonary infiltrates on chest X-ray at the time scheduled for T cell infusion

• Cardiac function: Fractional shortening <28% or left ventricular ejection fraction <50% by echocardiography

• Renal function: Creatinine clearance <50 mL/min/1.73 m2