NCT05336383

Phase II Study of Salvage Radiation Treatment After B-cell Maturation Antigen Chimeric Antigen Receptor T-cell Therapy for Relapsed Refractory Multiple Myeloma

• Status: Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: M.D. Anderson Cancer Center · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This study is a Phase II study to determine the preliminary safety and efficacy of salvage radiation treatment after BCMA CAR-T therapy in subjects with RRMM. The study population will consist of subjects with RRMM previously treated with SOC BCMA CAR-T cell therapy with active disease on the D30+ PET or other imaging scan after CAR-T infusion. Patients who are planned for salvage chemotherapy less than 14 days after completion of radiation treatment will be excluded. Radiation treatment will be to bony or soft tissue plasmacytomas in up to five radiation treatment fields to 10-20Gy (or equivalent dose in 2Gy fractions of 10-21Gy). Final dose, target, and technique are per treating radiation physician discretion within these guidelines. Thirty patients will be enrolled. The co-primary endpoints are objective response rate (ORR) at 6 months and duration of response (DOR) among responders.

Detailed description

Objectives Primary Objective: • The primary objective of the study is to evaluate the preliminary efficacy of salvage radiation therapy after BCMA CAR-T cell therapy in subjects with RRMM. Secondary Objectives: • Evaluate the safety of and other efficacy parameters of radiation treatment after BCMA CAR-T cell therapy in subjects with RRMM Exploratory Objectives: * Evaluate the immunophenotype and/or expression profile, and perform functional bulk and single cell analysis of CAR T cells, endogenous T cells as well as other immune cells in the blood, bone marrow and/or tumor tissue with BCMA CAR-T therapy and RT * Evaluate changes in the levels of cytokines, chemokines, and soluble factors in the blood with BCMA CAR-T therapy and RT * Evaluate changes in T cell receptor repertoire with BCMA CAR-T therapy and RT * Evaluate gut microbiome of patients treated with BCMA CAR-T therapy and RT

Conditions

• Multiple Myeloma
• Plasma Cell Neoplasm
• Malignant Plasma Cell Neoplasm

Interventions

Type	Name	Description
DRUG	Radiation Therapy	Given by Infusion

Timeline

• Start date: 2022-05-31
• Primary completion: 2026-12-07
• Completion: 2026-12-07
• First posted: 2022-04-20
• Last updated: 2026-04-15

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated drug study