Study to Evaluate the Safety and Efficacy of Anti-CD38 CAR-T in Relapsed or Refractory Multiple Myeloma Patients

A Phase 1, Open-Label, Dose-Escalation, Pharmacokinetic, and Pharmacodynamic Study of the Safety and Efficacy of CAR2 Anti-CD38 A2 CAR-T Cells in Patients With Relapsed or Refractory Multiple Myeloma

The study is an open-label Phase 1 single dose-escalation safety study of CAR2 Anti-CD38 A2 CAR-T Cells in patients with Relapsed or Refractory Multiple Myeloma, who meet all other eligibility criteria.

Study Overview

• Status: Completed
• Conditions: Relapsed or Refractory Multiple Myeloma
• Intervention / Treatment: Biological: CAR2 Anti-CD38 A2 CAR-T Cells

Detailed Description

All subjects who received investigational CAR-T therapy will be included in the analyses and summaries of safety, efficacy, pharmacokinetic, and pharmacodynamic assessments.

• Study Type: Interventional
• Enrollment (Actual): 10
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Florida
    • Jacksonville, Florida, United States, 32224
      • Mayo Clinic Florida
  • Minnesota
    • Rochester, Minnesota, United States, 55905
      • Mayo Clinic Minnesota
  • New York
    • New York, New York, United States, 10029
      • Icahn School of Medicine
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19104
      • University of Pennsylvania, Abramson Cancer Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 16 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• The patient must either have relapsed refractory multiple myeloma (RRMM) after receiving prior lines of anti-myeloma treatments that included at least lenalidomide (Revlimid®), pomalidomide (Pomalyst®), bortezomib (Velcade®), carfilzomib (Kyprolis®), and daratumumab (Darzalex®) (refractory MM is defined as the development of disease progression during therapy with an anti-myeloma regimen or within 60 days of the last dose of an anti-myeloma regimen or the achievement of less than a partial response (PR) after greater than or equal to 2 cycles; for relapsing patients the duration from the last dose of the last prior treatment regimen to relapse must be less than or equal to 12 months); OR have multiple myeloma that is refractory to or has relapsed within 1 year of receiving high-dose therapy [HDT]/autologous stem cell transplantation [ASCT] in first- or second-line (refractory is defined as the achievement of less than a PR at the Day 90 to 100 post-ASCT response assessment)
• Must have measurable disease as defined by the following: Serum M-protein greater than or equal to 1 g/dL; OR Urine M-protein greater than or equal to 200 mg/24 hours; OR Serum free light chain (FLC) assay; involved FLC level greater than or equal to 10 mg/dL provided the serum FLC ratio is abnormal; OR greater than or equal to 30% clonal plasma cells in the bone marrow aspirate or biopsy sample
• Must have a life expectancy of at least 12 weeks
• Subjects should be willing and able to comply with the study schedule and protocols
• Females of childbearing potential must have 2 negative pregnancy tests, agree to ongoing pregnancy testing during the study, and sexually active female and male subjects must be willing to use an effective method to avoid pregnancies.

Exclusion Criteria:

• Subjects who received anticancer therapy or investigational drug within 28 days of first dose
• Subjects who received any approved anticancer chemotherapy within 21 days of first dose (exception cyclophosphamide as NMA conditioning)
• Subjects with unresolved toxicity greater than Grade 2 from previous therapies
• Have myeloma involvement of central nervous system (CNS) or a history of brain metastasis or spinal cord compression
• Subjects with an ECOG performance status greater than or equal to 3
• Has received allogenic hematopoietic stem cell transplantation (HSCT) within 6 months, have active graft-versus-host disease (GVHD) following transplant, or receiving immunosuppressive therapy following a transplant
• Has received any CAR cell line therapies
• Has any clinically significant low baseline lab results for hemoglobin, platelet counts, and neutrophil counts, at screening unless resulting from underlying RRMM.
• Has any clinically significant elevated baseline lab results for serum creatinine, AST, and total bilirubin (except for patients in whom hyperbilirubinemia is attributed to Gilbert's syndrome) at screening regardless of causality.
• Known HIV or acquired immunodeficiency syndrome-related illness, acute or history of chronic hepatitis B or C.
• Female subjects who are pregnant or breastfeeding
• Active bacterial, viral or fungal infections
• Has active plasma cell leukemia
• Has medical condition, abnormality, or psychiatric illness that would prevent study participation
• Left ventricular ejection fraction (LVEF) less than 40%

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: CAR2 Anti-CD38 A2 CAR-T Cells; Relapsed or Refractory Multiple Myeloma	Biological: CAR2 Anti-CD38 A2 CAR-T Cells; Autologous IV infusion; dose-escalation

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Determine the MTD	The MTD is assessed according to a 3+3 dose-escalation design by the occurrence of treatment-emergent dose-limiting toxicities during the 28-day Treatment Period in the dose-escalation phase of the study	28 days

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Determine the CAR2 Anti-CD38 A2 CAR-T cell blood concentrations (Pharmacokinetic [PK] Profile) to evaluate the Cmax	CAR2 Anti-CD38 A2 CAR-T cell blood concentrations will be measured at different time points during the 28-day treatment period to evaluate the maximum concentration (Cmax).	28 days
Determine the CAR2 Anti-CD38 A2 CAR-T cell blood concentrations (Pharmacokinetic [PK] Profile) to evaluate the AUC	CAR2 Anti-CD38 A2 CAR-T cell blood concentrations will be measured at different time points during the 28-day treatment period to evaluate the area under the curve (AUC).	28 days
Evaluate the safety of Anti-CD38 A2 CAR-T cells in Patients with RRMM by incidence of treatment-emergent adverse events	The evaluation of safety will be measured by an assessment of the incidence of treatment-emergent adverse events for each patient in the dose-escalation and expansion phases of the study.	6 months
Assess preliminary efficacy by response rate in accordance with the modified International Myeloma Working Group (IMWG) criteria	As a measure of activity, overall response rate will be assessed according to the modified International Myeloma Working Group (IMWG) criteria. Response will be assessed for each patient over a 6-month timeframe during both the dose-escalation and expansion phases of the protocol.	6 months
Assess preliminary efficacy by depth of response in accordance with the modified International Myeloma Working Group (IMWG) criteria.	As a measure of activity, depth of response (ie, category of response) will be assessed according to the modified International Myeloma Working Group (IMWG) criteria. This will be assessed for each patient over a 6-month timeframe during both the dose-escalation and expansion phases of the protocol.	6 months
Assess preliminary efficacy by duration of response in accordance with the modified International Myeloma Working Group (IMWG) criteria.	As a measure of activity, duration of response will be assessed according to the modified International Myeloma Working Group (IMWG) criteria. This will be assessed for each patient over a 6-month timeframe during both the dose-escalation and expansion phases of the protocol.	6 months
Assess preliminary efficacy by progression-free survival.	As a measure of activity, Progression-free survival (PFS) will be assessed. The events for the assessment of PFS are disease progression and death events. This time to event endpoint will be estimated using Kaplan-Meier methods. Point estimates and 95% confidence intervals will be provided where appropriate.	6 months
Assess preliminary efficacy by overall survival.	As a measure of activity, Overall Survival (OS) will be assessed. The events for the assessment of OS are death events. Time to event endpoints will be estimated using Kaplan-Meier methods. Point estimates and 95% confidence intervals will be provided where appropriate.	6 months
The determination of the recommended phase 2 dose (RP2D) will be based on an evaluation of treatment-emergent events.	The RP2D will be assessed by the incidence of treatment-emergent adverse events during the Treatment and Observation Periods.	6 months
The determination of the recommended phase 2 dose will be based on an evaluation of overall response rate.	The rate of response as a determination factor for the RP2D will be assessed by the incidence of responses of at least partial response according to the IMWG criteria during the Treatment and Observation Periods.	6 months
The determination of the recommended phase 2 dose (RP2D) will be based on an evaluation of depth of response.	The depth of response as a determination factor for the RP2D will be assessed by the IMWG categories for response according to changes from baseline in M-protein levels in serum and urine, per cent plasma cells in the bone marrow, and size (area) of soft tissue extramedullary plasmacytomas (if applicable). This will be assessed for each patient over a 6-month timeframe during both the dose-escalation and expansion phases of the protocol.	6 months
The determination of the recommended phase 2 dose (RP2D) will be based on an evaluation of duration of response.	The duration of response as a determination factor for the RP2D will be assessed by the IMWG criteria for disease progression following the achievement of a response of at least a partial response according to changes in M-protein levels in serum and urine, per cent plasma cells in the bone marrow, the appearance of new lytic bone lesions, and/or the development of new soft tissue extramedullary plasmacytomas during the Treatment and Observation periods.	6 months
The determination of the recommended phase 2 dose (RP2D) will be based on an evaluation of progression-free survival.	Progression-free survival as a determination factor for the RP2D will be assessed by the IMWG criteria for disease progression events and death events. This time to event endpoint will be estimated using Kaplan-Meier methods. Point estimates and 95% confidence intervals will be provided where appropriate. Progression-free survival will be evaluated during the Treatment and Observation Periods of the study.	6 months
The determination of the recommended phase 2 dose (RP2D) will be based on an evaluation of overall survival.	Overall survival as a determination factor for the RP2D will be assessed by death events that occur during the Treatment and Observation Periods. Time- to-event endpoints will be estimated using Kaplan-Meier methods. Point estimates and 95% confidence intervals will be provided where appropriate.	6 months

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
An assessment of pharmacodynamics will be based on determining if there is an association of the achievement of at least a partial response with the level of Cmax of circulating CAR-T cells.	The Cmax of the concentration of circulating CAR2 anti-CD38 CAR-T cells will be determined during the Treatment Period for each patient. The achievement of at least a partial response for each patient will be assessed during both the Treatment and Observation Periods for each patient. An analysis to determine if a specific level of Cmax for the circulating CAR2 anti-CD38 CAR-T cells obtained during the Treatment Period is required for patients to achieve at least a partial response during the Treatment and Observation Periods.	6 months
An assessment of pharmacodynamics will be based on determining if there is an association of the achievement of at least a partial response with the AUC of circulating CAR-T cells.	The AUC of circulating CAR2 anti-CD38 CAR-T cells will be determined during the Treatment Period for each patient. The achievement of at least a partial response for each patient will be assessed during both the Treatment and Observation Periods for each patient. An analysis to determine if a specific value for the AUC of circulating CAR2 anti-CD38 CAR-T cells obtained during the Treatment Period is required for patients to achieve at least a partial response during the Treatment and Observation Periods.	6 months
An assessment of pharmacodynamics will be based on determining if there is an association of the incidence of at least Grade 3 cytokine release syndrome (CRS) adverse events with the level of Cmax of circulating CAR-T cells.	The Cmax of the concentration of circulating CAR2 anti-CD38 CAR-T cells will be determined during the Treatment Period for each patient. The incidence of CRS adverse events for each patient will be assessed during both the Treatment and Observation Periods for each patient. An analysis will be conducted to determine if there is a level of Cmax for circulating CAR2 anti-CD38 CAR-T cells obtained during the Treatment Period above which is associated with the development of at least Grade 3 CRS in patients during the Treatment and Observation Periods.	6 months
An assessment of pharmacodynamics will be based on determining if there is an association of the incidence of at least Grade 3 CRS with the AUC of circulating CAR-T cells.	The AUC of circulating CAR2 anti-CD38 CAR-T cells will be determined during the Treatment Period for each patient. The incidence of at least Grade 3 CRS for each patient will be assessed during both the Treatment and Observation Periods for each patient. An analysis to determine if there is a specific value for the AUC of circulating CAR2 anti-CD38 CAR-T cells obtained during the Treatment Period above which is associated with the development of at least Grade 3 CRS in patients during the Treatment and Observation Periods.	6 months
An assessment of pharmacodynamics will be based on determining if there is an association of the incidence of at least Grade 2 neurotoxicity adverse events with the level of Cmax of circulating CAR-T cells.	The Cmax of the concentration of circulating CAR2 anti-CD38 CAR-T cells will be determined during the Treatment Period for each patient. The incidence of neurotoxicity adverse events for each patient will be assessed during both the Treatment and Observation Periods for each patient. An analysis will be conducted to determine if there is a level of Cmax for circulating CAR2 anti-CD38 CAR-T cells obtained during the Treatment Period above which is associated with the development of at least Grade 2 neurotoxicity adverse events in patients during the Treatment and Observation Periods.	6 months
An assessment of pharmacodynamics will be based on determining if there is an association of the incidence of at least Grade 2 neurotoxicity adverse events with the AUC of circulating CAR-T cells.	The AUC of circulating CAR2 anti-CD38 CAR-T cells will be determined during the Treatment Period for each patient. The incidence of at least Grade 2 neurotoxicity adverse events for each patient will be assessed during both the Treatment and Observation Periods for each patient. An analysis to determine if there is a specific value for the AUC of circulating CAR2 anti-CD38 CAR-T cells obtained during the Treatment Period above which is associated with the development of at least Grade 2 neurotoxicity adverse events in patients during the Treatment and Observation Periods.	6 months

Collaborators and Investigators

• Sponsor: Sorrento Therapeutics, Inc.

Study record dates

Study Major Dates

• Study Start (Actual): October 15, 2018
• Primary Completion (Actual): August 23, 2020
• Study Completion (Actual): February 28, 2022

Study Registration Dates

• First Submitted: February 14, 2018
• First Submitted That Met QC Criteria: March 7, 2018
• First Posted (Actual): March 14, 2018

Study Record Updates

• Last Update Posted (Actual): March 16, 2022
• Last Update Submitted That Met QC Criteria: March 14, 2022
• Last Verified: March 1, 2022

More Information

Terms related to this study

• Keywords: CAR2 Anti-CD38 A2 CAR-T Cells
• Additional Relevant MeSH Terms: Cardiovascular Diseases; Vascular Diseases; Immune System Diseases; Neoplasms by Histologic Type; Neoplasms; Lymphoproliferative Disorders; Immunoproliferative Disorders; Hematologic Diseases; Hemorrhagic Disorders; Hemostatic Disorders; Paraproteinemias; Blood Protein Disorders; Multiple Myeloma; Neoplasms, Plasma Cell
• Other Study ID Numbers: SOR-CART-MM-001

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No