CAR20(NAP)-T Therapy for B Cell Lymphoma (CARMA-01 Study)

A cancer patient's T cells can be isolated and engineered to express a chimeric antigen receptor (CAR), which re-directs the T cells to recognize and kill tumor cells expressing that particular antigen. CD19-targeted CAR-T cell therapy has shown good effects for B cell malignancies, even cure, in otherwise therapy refractory patients.

Antigen escape, i.e., the downregulation of the antigen targeted by the CAR due to the selective pressure caused by the CAR-T cell therapy is a challenge. For patients treated with CD19 CAR-T cell therapy, about 30% of the patients are resistant to treatment and about 20% of patients relapse after an initial response.

CAR20(NAP)-T cells target CD20 and upon target recognition secrete a bacterial-derived pluripotent immune-stimulating factor named NAP (Helicobacter pylori Neutrophil-activating protein). Secretion of NAP in the tumor microenvironment can induce an endogenous bystander immune response, that counteracts antigen escape and thereby improves the therapeutic outcome.

CAR20(NAP)-T is an investigational agent not yet approved by authorities.

Design:

The study is designed as 3+3 dose escalation phase I, and a dose expansion Phase IIa. The safety, tolerability, PK/PD, and efficacy will be evaluated.Dose escalation is to be based on the incidence of dose-limiting toxicity (DLTs). The investigator or sub-investigator will decide if the AE is related to IMP-treatment on a case-by-case basis depending on the character of the DLT symptoms. Investigator or sub-investigator has a possibility to classify various toxicity observed in patient as DLT.The Recommended phase II dose (RP2D) is decided based on safety, PK/PD data as well as preliminary clinical activity data from the Phase I dose escalation. After setting the RP2D, additional patients will be treated at RP2D to make sure at least 6 patients will be treated at RP2D dose level already at the phase I part.

Protocol treatment:

The enrolled patient will undergo a leukapheresis procedure to harvest enough T cells for IMP production. During CAR20(NAP)-T manufacturing, the patient may receive bridging therapy to control tumor burden. All patients will receive pre-conditioning chemotherapy (cyclophosphamide and fludarabine) followed by one dose of CAR20(NAP)-T cell infusion intravenously. The patient will then be followed by doctor/study nurse for evaluation of the health status and side effects. At follow-up visits, blood samples will be obtained and CT imaging will be performed. Patient will actively participate in the study for about 24 months when the final follow-up visit will be scheduled.

CAR20(NAP)-T treatment

Biological: CAR20(NAP)-T · Drug: Cyclophosphamide · Drug: Fludarabine

Autologous CAR-T cells targeting CD20 and upon target recognition express and secrete NAP

pre-conditioning chemotherapy

pre-conditioning chemotherapy

Time frame: First infusion up to 30 days

The incidence of dose limiting toxicity (DLT). Number of Participants Experiencing Adverse Events (AEs) Defined as Dose Limiting Toxicities (DLTs)

Time frame: 24 months

The nature, frequency, severity, and tolerability of adverse events (AEs) including clinically significant laboratory data, and their relation to dosage.

Time frame: Either 24 month or 15 years during long-term follow up if clinically indicated

PD is assessed by determine circulating B cell level; PK is assessed by determine circulating CAR20(NAP)-T cells.

Time frame: 24 months

ORR is defined as the incidence of a complete response or a partial response by the revised Lugano classification as determined by the study investigators. All patients that do not meet the criteria for an objective response by the analysis cutoff date will be considered non-responders.

Time frame: 24 months

PFS is defined as the time from the IMP treatment date to the date of disease progression per the revised Lugano classification or death from any cause.

Time frame: 24 months

the incidence of complete response (CR), partial response (PR), stable disease (SD), progressive disease (PD), or unevaluable (UE) as best response to treatment.

Time frame: 24 months

DOR is defined as the date of their first objective response (which is subsequently confirmed) to disease progression per the revised Lugano classification or death regardless of cause. Patients not meeting the criteria for progression or death by the analysis data cutoff date will be censored at their last evaluable disease assessment date and their response will be noted as ongoing.

Time frame: either 24 months or 15 years during long-term follow up if clinically indicated

defined as the time from IMP treatment to the date of death. Patients alive by the analysis data cutoff date will be censored at their last contact date. The overall survival rate will be reported at different cut-off time points.

Time frame: either 24 months or 15 years during long-term follow up if clinically indicated

Determine anti-NAP immune response

Time frame: either 24 months or 15 years during long-term follow up if clinically indicated

Assess induced tumor specific endogenous T-cell immune response

A Phase I/IIa Multicenter Study Evaluating the Safety and Efficacy of CAR20(NAP)-T in Patients With Relapsed/Refractory B Cell Lymphoma (CARMA-01 Study)