Clinical trial NCT05577000: Anti-BCMA Chimeric Antigen Receptor T Cells for Relapsed or Refractory Multiple Myeloma
Official title: A Phase 1b Clinical Trial of Anti-BCMA Chimeric Antigen Receptor T Cells for Treatment of Relapsed or Refractory Multiple Myeloma
Study type: INTERVENTIONAL
Overall status: ACTIVE_NOT_RECRUITING
Phase: PHASE1
Conditions: Refractory Multiple Myeloma
Relapsed Multiple Myeloma
Keywords: CAR-T Therapies
Lead sponsor: University of California, San Francisco
Sponsor class: OTHER
Collaborators: name: Actavis Inc.
name: University of California, Davis
name: Eugia Pharma Specialities Limited
First posted: 2022-10-13
Enrollment: 5
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: SEQUENTIAL
Primary purpose: TREATMENT

Brief summary: This is an open-label study to determine the safety of anti-B-cell maturation antigen (BCMA) Chimeric antigen receptor T-cell (CAR T) therapy in participants with Relapsed or Refractory Multiple Myeloma (RRMM).

Detailed description: PRIMARY OBJECTIVE:

1. To evaluate the safety of administering chimeric antigen receptor (CAR)-T cells targeting BCMA to participants with RRMM (Dose Escalation).
2. To determine the maximum tolerated dose (MTD) for anti-BCMA CAR-T cells (Dose Escalation).
3. Determine whether administering chimeric antigen receptor T cells targeting BCMA to participants with RRMM increases the overall response rate (ORR) in RRMM compared with historical data for non-CAR agents per International Myeloma Working Group (IMWG) response criteria (Dose Expansion).

SECONDARY OBJECTIVES:

Dose Expansion Only:

1. To describe the efficacy of CAR-T cells targeting BCMA in participants with RRMM.
2. To evaluate the feasibility of manufacturing anti-BCMA CAR-T cells locally and ability to produce adequate quantities of vector positive T-cells.
3. To evaluate the safety and toxicity of CAR-T cells targeting BCMA to participants with RRMM

OUTLINE:

Participants will be enrolled sequentially to each dose level dependent on analysis of dose-limiting toxicities at the previous dose level. A dose expansion will occur at the maximum tolerated dose (MTD). Participants will undergo apheresis with collection of autologous peripheral blood mononuclear cells that will be used to generate CAR-T cells. After successful generation of the anti-BCMA CAR-T cells drug product (DP), participants will undergo lymphodepleting chemotherapy with fludarabine (and cyclophosphamide. Participants will undergo an additional evaluation of eligibility on Day -1 or 1 prior to infusion of anti-BCMA CAR-T cell product. A single infusion of anti-BCMA CAR-T cells at the starting dose will be given on Day 1. Following treatment with DP, participants will be followed up at 12 months and annually for up to 15 years.

Eligibility criteria: Eligibility for enrollment:

Inclusion Criteria:

1. Voluntarily sign informed consent form
2. \>=18 years of age at the time of signing informed consent
3. Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1
4. Diagnosis of MM with relapsed or refractory disease and have had at least 3 different prior lines of therapy including proteasome inhibitor (PI; e.g., bortezomib or carfilzomib) immunomodulatory therapy (IMiD; e.g., lenalidomide or pomalidomide), and anti-CD38 antibody therapy
5. Participants must have measurable disease, including at least one of the criteria below:

   1. Serum M-protein greater or equal to 0.5 g/dL.
   2. Urine M-protein greater or equal to 200 mg/24 h.
   3. Serum free light chain (FLC) assay: involved FLC level of \>= 100 mg/L.
6. Adequate organ function, defined as:

   1. Hemoglobulin \>8 gm/dl (transfusions allowed).
   2. Platelets \>50,000/microliter (uL) (in the absence of platelet transfusion within 7 days of apheresis, but transfusion permitted prior to lymphodepleting chemotherapy).
   3. Absolute neutrophil count (ANC) \> 1000/uL in the absence of growth factor support (filgrastim within 7 days or pegfilgrastim within 14 days of apheresis, but growth factor permitted prior to lymphodepleting chemotherapy).
   4. Alanine aminotransferase (ALT)/aspartate aminotransferase (AST) =\< 3 x institutional upper limit of normal (ULN).
   5. Total bilirubin =\< 1.5 mg/dl x institutional ULN, except with Gilbert's syndrome.
   6. Serum creatinine clearance (CrCl) \>= 45 mL/min using Cockcroft-Gault formula.
   7. Adequate cardiac function, defined as left ventricular ejection fraction (LVEF) \>= 40% as assessed by echocardiogram or multiple uptake gated acquisition (MUGA).
7. Women of childbearing potential (defined as all women physiologically capable of becoming pregnant) must have a negative serum or urine pregnancy test AND agree to use highly effective methods of contraception for 1 year after the last dose of anti-BCMA CAR-T cells.
8. Males who have partners of childbearing potential must agree to use an effective barrier contraceptive method.

Exclusion Criteria:

1. Autologous transplant within 6 weeks of planned CAR-T cell infusion.
2. Active other malignancy, other than non-melanoma skin cancer, carcinoma in situ (e.g., cervix, bladder, or breast). Any fully treated malignancies or indolent, clinically insignificant malignancies can be discussed among the study team to determine eligibility.
3. HIV seropositivity.
4. Serologic status reflecting active hepatitis B or C infection. Patients that are positive for hepatitis B core antibody, hepatitis B surface antigen (HBsAg), or hepatitis C antibody must have a negative polymerase chain reaction (PCR) prior to enrollment. (PCR positive patients will be excluded).
5. Participants with uncontrolled intercurrent illness including, but not limited to ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, uncontrolled cardiac arrhythmia, pulmonary abnormalities, or psychiatric illness/social situations that would limit compliance with study requirements.
6. Pregnant or breastfeeding women are excluded from this study because CAR-T cell therapy may be associated with the potential for teratogenic or abortifacient effects. Because there is an unknown, but potential risk for adverse events in nursing infants secondary to treatment of the mother with CAR-T cells, breastfeeding should be discontinued. These potential risks may also apply to other agents used in this study. NOTE: Women of childbearing potential must have a negative serum or urine pregnancy test.
7. Patients with currently symptomatic central nervous system (CNS) pathology such as epilepsy, seizure disorders, paresis, aphasia, uncontrolled cerebrovascular disease, severe brain injuries, dementia, and Parkinson's disease.
8. History of autoimmune disease (e.g., rheumatoid arthritis, systemic lupus erythematosus) with requirement of immunosuppressive medication within 6 months.

Eligibility for Infusion of Investigational Product:

Includes the inclusion/exclusion criteria required for enrollment with the following exceptions and additions.

Inclusion criteria exceptions:

1. Hematologic function parameters will not be included as a pre-infusion eligibility criterion (because lymphodepletive chemotherapy is expected to cause pancytopenia).
2. Laboratory result abnormalities that are considered not clinically significant by the principal investigator, AND are not the result of a demonstrated active infection or an active central nervous system condition.

Exclusion criteria additions:

1. Use of anti-multiple myeloma therapy, including systemic corticosteroids within 14 days prior to lymphodepletive chemotherapy.
2. Neurologic symptoms suggestive of an active central nervous system condition.

Primary outcomes:
measure: Proportion of participants with treatment-emergent adverse events (AE) (Dose Escalation)
timeFrame: From initiation of study treatment (day 1) to 29 days following CAR-T infusion
measure: Proportion of participants who experience a dose-limiting toxicity (DLT) (Dose Escalation)
timeFrame: From initiation of study treatment (day 1) to 29 days following CAR-T infusion
measure: Overall Response Rate (ORR)
timeFrame: Up to 12 months following CAR- T infusion
Secondary outcomes:
measure: Duration of response
timeFrame: Up to 12 months following CAR- T infusion
measure: Progression-free Survival (PFS)
timeFrame: Up to 12 months following CAR- T infusion
measure: Overall Survival
timeFrame: Up to 15 years
measure: Proportion of participants for whom BCMA CAR T-cell therapy is manufactured successfully
timeFrame: From initiation of CAR T-cell manufacturing to end of infusion, up to 21 days
measure: Proportion of participants who complete study treatment
timeFrame: From initiation of CAR T-cell manufacturing to end of infusion, up to 21 days
measure: Proportion of participants with treatment-emergent adverse events (AE) (Dose Expansion)
timeFrame: From initiation of CAR T-cell manufacturing to end of first follow-up, approximately 13 months
Other outcomes:
Locations:
city: San Francisco
country: United States
facility: University of California, San Francisco
state: California
Study officials:
affiliation: University of California, San Francisco
name: Thomas Martin, MD
role: PRINCIPAL_INVESTIGATOR
References: