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Cytotoxic T-Lymphocytes for the Prophylaxis of Cytomegalovirus After Allogeneic Stem Cell Transplant

NCT00078533 · Status: COMPLETED · Phase: PHASE1 · Type: INTERVENTIONAL · Enrollment: 26

Last updated 2014-10-08

No results posted yet for this study

Summary

Patients have a type of blood cell cancer, other blood disease or a genetic disease for which they will receive a stem cell transplant. The donor of the stem cells will be either a brother or sister or another relative or a closely matched unrelated donor. We are asking patients to participate in this study which tests if blood cells from the donor that have been grown in a special way, can prevent the patients from getting an infection with a virus called Cytomegalovirus or CMV.

CMV is a virus that can cause serious infections in patients with suppressed immune systems. It usually affects the lungs and can cause a very serious pneumonia, but it can also affect the intestinal tract, the liver and the eyes. Approximately 2/3 of normal people harbor this virus in their body. In healthy people CMV rarely causes any problems because the immune system can keep it under control. If the patient and/or their donor is positive for CMV, they are at risk of developing CMV disease while the patients immune system is weak post transplant. Usually, this risk is highest during the first 3-4 months after the transplant.

CMV disease can be prevented during this time in most people by using drugs that can kill the virus such as Ganciclovir, Foscarnet, or Cidofovir . However, these medications have many side effects and have to be given daily by vein for approximately 4-5 months after transplant. One of the side effects is that it takes the new immune system much longer to develop an effective defense against the virus. Therefore, once the medicines are stopped, the patients still have a chance to develop CMV disease.

We want to see if we can use a kind of white blood cell called T cells that we have grown from the stem cell donor instead of the regular treatment with Ganciclovir or Foscarnet to prevent CMV from "flaring up". These cells have been trained to attack CMV virus infected cells. We will grow these T cells from blood taken from the donor before the patients transplant. These cells are called CMV-specific cytotoxic T-lymphocytes or CMV CTL, and they will be given to the patient around 30 days after their transplant.

We have used this sort of therapy to treat a different virus which can cause problems after transplant called Epstein Barr Virus (EBV). Doctors at other places have used similar T cells to treat or prevent CMV infections after transplant and have not seen any significant problems. These CMV specific cytotoxic T cells are an investigational product not approved by the Food and Drug Administration.

Conditions

  • Cytomegalovirus Infections

Interventions

BIOLOGICAL

CMV CTL infusion

Three dose levels will be explored. The lowest dose level will be 1x10\^7cells/m2 and the highest will be 1x10\^8/m2. 3-6 pts will be entered at each dose level (depending on toxicity). If there are no toxicities and immunological efficacy is not seen at any dose, then the doses will be further escalated after additional local and federal approval. Additional patients will be treated at dose level 1 in order to assess the secondary objective of virus-specific immunity from the CTL infusions

Sponsors & Collaborators

  • Center for Cell and Gene Therapy, Baylor College of Medicine

    collaborator OTHER

  • The Methodist Hospital Research Institute

    collaborator OTHER

  • National Heart, Lung, and Blood Institute (NHLBI)

    collaborator NIH

  • Baylor College of Medicine

    lead OTHER

Principal Investigators

  • Helen E Heslop, MD · Baylor College of Medicine

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2004-04-30
Primary Completion
2010-07-31
Completion
2011-06-30

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00078533 on ClinicalTrials.gov