Study to Evaluate the Role of Siltuximab in Treatment of Cytokine Release Syndrome (CRS) and Immune Effector Cell Associated Neurotoxicity (ICANS) Related to CAR-T Cell Therapy

May 7, 2026 updated by: Amitkumar Mehta, MD, University of Alabama at Birmingham

A Phase II Pilot Study to Evaluate the Role of Siltuximab in Treatment of Cytokine Release Syndrome (CRS) and Immune Effector Cell Associated Neurotoxicity (ICANS) Related to Chimeric Antigen Receptor T-Cell Therapy (CAR-T) in Hematological Malignancies

This study will evaluate the use of siltuximab to decrease the severity of cytokine release syndrome (CRS) and immune effector cell-associated neurological syndrome (ICANS) in patients who will receive chimeric antigen receptor (CAR) T-cell therapy for the treatment of hematological malignancies.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Patients eligible to receive CAR T-cell therapy for FDA-approved indications in hematological malignancies will be enrolled in this study on the day of CAR T-cell infusion. Patients will be followed until they develop grade 1 or higher CRS and/or ICANS. On developing these syndromes, siltuximab will be administered with close monitoring and follow-up for resolution of symptoms. If symptoms continue to worsen, then an additional dose of siltuximab will be given. If the symptoms leading to CRS do not resolve, then rescue tocilizumab will be administered. The study's primary endpoint is to assess the response rate of siltuximab in the resolution of CRS within 14 days. The study's secondary endpoint is to assess the response rate of siltuximab in the resolution of ICANS, the safety of siltuximab, and the overall response rate of CAR T-cell therapy.

Study Type

Interventional

Enrollment (Actual)

24

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Alabama
      • Birmingham, Alabama, United States, 35294
        • University of Alabama at Birmingham

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients who are planned to receive chimeric antigen receptor T-cell therapy as per the United States Food and Drug Agency (USFDA) approved indications for Diffuse large B-cell lymphoma (DLBCL), Mantle cell lymphoma (MCL), Follicular lymphoma (FL), Primary mediastinal large B-cell lymphoma (PMBCL), High grade B-cell lymphoma, DLBCL arising from follicular lymphoma, Multiple myeloma and B-cell precursor acute lymphoblastic leukemia
  • Patients with hepatitis C virus (HCV) can be included if they have completed therapy for hepatitis C with undetectable HCV RNA viral load.
  • Patients with Hepatitis B can be included if they are on suppressive therapy for hepatitis B infection and with no detectable viral load.
  • Adequate organ function as defined below unless attributed to disease involvement.Acceptable window for assessing adequate organ function is 7 days to 30 days before planned CAR T-cell infusion with day 0 as the planned day of CAR T-cell infusion.Adequate liver function (bilirubin < 2mg/dL, aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) <3 x ULN), adequate kidney function (crcl > 30ml/min using Cockcroft-Gault, based on actual weight) and adequate hematological parameters (Absolute neutrophil count ≥ 1,000/µL, Hemoglobin > 8, Platelet Count ≥ 50,000/ µL)
  • Patients able to tolerate washout periods for therapies prior to CAR T-cell infusion. Systemic therapy: Washout period is 2 weeks prior to CAR T-cell infusion. Radiation therapy: Washout period is 1 week prior to CAR T-cell infusion. Corticosteroids: The washout period is 5 days prior to CAR T-cell infusion.
  • A negative urine pregnancy test is required within 1 week for all women of childbearing potential prior to enrolling on this trial.
  • For females of reproductive potential: use of highly effective contraception for at least 1 month prior to screening and agreement to use such a method during study participation and for an additional 4 months after infusion of siltuximab.
  • For males of reproductive potential: use of condoms or other methods to ensure effective contraception with partner
  • Willing and able to participate in all required evaluations and procedures in this study protocol including receiving intravenous administration of the investigational product and being admitted, when required, for at least 24 hours during investigational product administration.

Exclusion Criteria:

  • Subjects requiring ongoing daily corticosteroid therapy at a dose of > 10 mg of prednisone per day (or equivalent). Pulsed corticosteroid use for disease control is acceptable.
  • Active autoimmune disease requiring immunosuppressive therapy is excluded unless discussed with the principal investigator (PI)
  • Pregnant women are excluded from this study.
  • Evidence of ongoing systemic bacterial, or fungal or viral infection, except localized fungal infection of skin or nails.
  • Patients with ongoing or past HIV infection.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

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

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Siltuximab
Patients who experience CRS/ICANS will receive this treatment
Drug: Siltuximab
Siltuximab is administered at the dose of 11mg/kg via intravenous infusion over 1 hour. If no resolution of CRS is achieved then a repeat dose of siltuximab at the dose of 11mg/kg via intravenous infusion over 1 hour will be given.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Participants With a Complete Response for Cytokine Release Syndrome (CRS)
Time Frame: Baseline through 14 days
Participants who achieve a resolution of CRS. Resolution of CRS is defined as absence of symptoms leading to diagnosis of CRS for 24 hours.
Baseline through 14 days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Participants With a Response for Immune Effector Cell Associated Neurotoxicity Syndrome (ICANS)
Time Frame: Baseline through 28 days
Participants who achieve a resolution or improvement in their ICANS. Complete response or partial response for ICANS is defined as either complete disappearance or decrease in the grade of severity as measured by ASTCT Consensus Grading for ICANS. The ASTCT grade is from 1 to 5 for ICANS with 1 being mild symptoms and 5 being severe symptoms.
Baseline through 28 days
Participants Experiencing Adverse Events From Siltuximab
Time Frame: Baseline through 28 days
All Adverse Events (AE's) will be reported and evaluated using National Cancer Institute's Common Terminology Criteria (CTCAE) v5.0.
Baseline through 28 days
Participants With Response to CAR T-cell Therapy
Time Frame: Baseline through day 90
This will be measured by using specific criteria's for Lymphoma, Multiple Myeloma or Acute Lymphoblastic Leukemia (ALL) [Based on the patients diagnosis]
Baseline through day 90

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Alabama at Birmingham

Investigators

  • Principal Investigator: Amitkumar Mehta, MD, University of Alabama at Birmingham

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

November 15, 2021

Primary Completion (Actual)

January 20, 2026

Study Completion (Actual)

January 20, 2026

Study Registration Dates

First Submitted

July 5, 2021

First Submitted That Met QC Criteria

July 14, 2021

First Posted (Actual)

July 23, 2021

Study Record Updates

Last Update Posted (Actual)

June 3, 2026

Last Update Submitted That Met QC Criteria

May 7, 2026

Last Verified

March 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRB-300007103

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

To Be determined

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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