Thymoglobulin (ATG) Dose Finding Study

January 19, 2012 updated by: M.D. Anderson Cancer Center

Dose Finding Study of Thymoglobulin (ATG) in Patients With Steroid-Refractory Acute Graft Versus Host Disease (aGVHD)

Primary Objective:

  • To determine the response and toxicity rate at day 56 of two different dose levels of thymoglobulin (ATG) [anti-thymocyte globulin (rabbit)] as a treatment of steroid-refractory acute graft versus host disease (aGVHD).

Secondary Objectives:

  • To evaluate the response rate at day 28.
  • To evaluate the overall survival and non-relapse mortality at 6 months.
  • To determine the toxicity profile of thymoglobulin when used for the treatment of steroid-refractory aGVHD in each of two dose schedules.
  • To characterize the pharmacokinetic profile of thymoglobulin in each of two dose schedules.
  • To analyze biomarkers of cellular drug effect by quantifying T-cell apoptosis in aims of finding the minimal effective dose.
  • To determine immune-reconstitution after administration of thymoglobulin to patients with steroid-refractory aGVHD for each dose schedule.

Study Overview

Status

Terminated

Conditions

Intervention / Treatment

Detailed Description

GvHD is a common side effect of a stem cell transplant. It is caused by a type of white blood cell (a lymphocyte). ATG is designed to kill lymphocytes and is commonly used to help prevent or treat GvHD and to treat steroid-refractory aGvHD.

Before you can start treatment on this study, you will have "screening tests." These tests will help the doctor decide if you are eligible to take part in this study. You will be asked questions about your medical history. You will have a complete physical exam. You will have blood drawn (about 2 tablespoons) for routine tests and to check for any viral infections. Women who are able to have children must have a negative blood (about 1 teaspoon) or urine pregnancy test. You will also have a biopsy of the site that is suspected to be affected by aGvHD. The study doctor will describe the type of biopsy procedure you will have, which will depend on the part of the body that is affected by the disease. If you had an earlier biopsy performed that confirmed aGvHD, you will not need a biopsy repeated for this study.

If you are found to be eligible to participate in this study, you will be randomly assigned (as in the toss of a coin) to 1 of 2 groups. Participants in Group 1 will receive a higher dose of ATG by vein. Participants in Group 2 will receive a lower dose of ATG by vein. You will have an equal chance of being in 1 of the 2 groups. Participants in both groups will receive doses of ATG over 4-6 hours, 1 time a day every other day for a total of 3 doses.

During this study, you will be able to remain on steroids and any other drugs you may be receiving for treatment of aGvHD (such as tacrolimus or cyclosporine). You will also have blood drawn (about 1 teaspoon) to learn the effect of ATG on the lymphocytes.

You will be taken off this study, if the disease is stable as determined by the study doctor, if the disease gets worse, or you experience any intolerable side effects. If you are taken off this study, your study doctor will discuss other treatment options with you.

After you finish receiving the study medication, you will come to the clinic at regularly scheduled follow-up visits. At first, you will be seen in the clinic once a week for 1 month. You will also have additional blood drawn (about 2 teaspoons) for biomarker testing (testing that looks at how the drug is working in your body). After the first month of follow-up visits, you will come in for visits every other week while you are on this study, which will continue until you have at least 2 consecutive (back to back) evaluations of the disease status to see if the disease is stable.

This is an investigational study. ATG is FDA approved and commercially available. You and/or your insurance provider will be financially responsible for the cost of ATG while you are on this study. Up to 40 patients will take part in this study. All will be enrolled at M.D. Anderson.

Study Type

Interventional

Enrollment (Actual)

1

Phase

  • Phase 2
  • Phase 1

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
    • Texas
      • Houston, Texas, United States, 77030
        • U.T. M.D. Anderson Cancer Center

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

  • ADULT
  • OLDER_ADULT
  • CHILD

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Patients who underwent their first allogeneic transplant for any malignancy and with any cell (bone marrow, peripheral stem cell, cord blood) or donor (matched or mismatched related or unrelated) source.
  2. Biopsy-proven, grade II-IV aGVHD following allogeneic hematopoietic stem cell transplantation (HSCT) of any source (bone marrow, peripheral blood or cord blood stem cells). Enrollment may be started prior to results of biopsy in cases of high clinical suspicion for aGVHD.
  3. Early steroid-refractory aGVHD. This is defined as any NR or PD after a minimum of 3 days and not more than 1 week of 1 mg/kg/day of methylprednisolone.
  4. Ability to sign informed consent.
  5. Ability to return for clinical follow-up as specified in the protocol.
  6. Inability to taper as defined by patients on < or = 1 mg/kg/day of methylprednisolone but unable to further taper without resultant increase of acute GVHD stage.
  7. Patients with a reflare of a GVHD defined as worsening of 1 stage of acute GVHD in a patient who initially responded.

Exclusion Criteria:

  1. Relapsed malignancy.
  2. Acute GVHD as a result of a second or subsequent transplant or donor lymphocyte infusion (DLI).
  3. Active, uncontrolled infection.
  4. Patients who have received any second-line of immunosuppressive treatment for GVHD beyond corticosteroids and calcineurin inhibitors. Topical steroids, oral budesonide and extracorporeal photochemotherapy started at the time of steroids are allowed.
  5. Life-threatening infusion reaction or hypersensitivity to any formulation of ATG in the past.
  6. Patients who are pregnant or are breast feeding.

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: RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: DOUBLE

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
EXPERIMENTAL: High Dose Thymoglobulin (ATG)
High Dose Thymoglobulin (ATG): 1.25mg/kg by vein every other day for 3 doses (total dose = 3.75mg/kg)
Drug: High Dose Thymoglobulin (ATG)
1.25mg/kg by vein every other day for 3 doses (total dose = 3.75mg/kg)
Other Names:
  • ATG
  • Antithymocyte Globulin
EXPERIMENTAL: Low Dose Thymoglobulin (ATG)
Low Dose Thymoglobulin (ATG): 2.5 mg /kg by vein every other day for 3 doses (total dose = 7.5 mg/ kg).
Drug: Low Dose Thymoglobulin (ATG)
2.5 mg /kg by vein every other day for 3 doses (total dose = 7.5 mg/ kg).
Other Names:
  • ATG
  • Antithymocyte Globulin

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Response Rate
Time Frame: Day 56
Response assessed at day 56, and a complete response or partial response considered a success. A toxic event defined as a life threatening infection, any death due to infection, or any death considered to be directly related to the administration of ATG.
Day 56

Collaborators and Investigators

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

Sponsor

M.D. Anderson Cancer Center

Collaborators

Genzyme, a Sanofi Company

Investigators

  • Principal Investigator: Amin M. Alousi, MD, M.D. Anderson Cancer Center

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

December 1, 2006

Primary Completion (ACTUAL)

August 1, 2007

Study Completion (ACTUAL)

August 1, 2007

Study Registration Dates

First Submitted

December 7, 2006

First Submitted That Met QC Criteria

December 8, 2006

First Posted (ESTIMATE)

December 11, 2006

Study Record Updates

Last Update Posted (ESTIMATE)

January 23, 2012

Last Update Submitted That Met QC Criteria

January 19, 2012

Last Verified

January 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2006-0370

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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