T-Regulatory Cell Kinetics, Stem Cell Transplantation, REGKINE (REGKINE)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00578461
Recruitment Status : Terminated
First Posted : December 21, 2007
Results First Posted : September 8, 2014
Last Update Posted : April 22, 2016
Texas Children's Hospital
Information provided by (Responsible Party):
Robert Krance, Baylor College of Medicine

Brief Summary:

Patients are being asked to participate in this study because they have a cancer in their blood (such as leukemia or lymphoma) or myelodysplastic/myeloproliferative (pre-leukemia). We suggest a treatment that might help them live longer without disease than other treatment plans would. This treatment is known as a stem cell transplant. We believe this may help the patient as it allows us to give much stronger doses of drugs and radiation to kill the diseased cells than we could give without the transplant. We also think that the healthy cells may help fight any diseased cells left after the transplant.

Stem Cells are special "mother" cells that are found in the bone marrow (the spongy tissue inside bones), although some are also found in the bloodstream (peripheral blood). As they grow, they become either white blood cells which fight infection, red blood cells which carry oxygen and remove waste products from the organs and tissues or platelets, which enable the blood to clot. For the transplant to take place, we will collect these stem cells from a "donor" (a person who agrees to donate these cells) and give them to the patient. The patient has a type of blood cell cancer or other blood problem that is very hard to cure with standard treatments and they will receive a stem cell transplant (SCT). If they have a brother or sister that is a perfect match and agrees to donate, the stem cells will come from him/her. Before the transplant, two very strong drugs plus total body irradiation will be given to the patient (pre-conditioning). This treatment will kill most of the blood-forming cells in the bone marrow. We will then give the patient the healthy stem cells. Once these healthy stem cells are in the bloodstream they will move to the bone marrow (graft) and begin producing blood cells that will eventually mature into healthy red blood cells, white blood cells and platelets.

Also, we will ask permission to draw blood from the patient so that we can measure the number of certain blood cells called T regulatory cells. T regulatory cells are special immune cells that can control or regulate the body's immune response. We want to determine whether T regulatory cells are important participants in graft versus host disease (GVHD), infection and relapse. In GVHD, certain cells from the donated marrow or blood (the graft) attack the body of the transplant patient (the host). GVHD can affect many different parts of the body. The skin, eyes, stomach and intestines are affected most often. GVHD can range from mild to life-threatening. We do not know whether T regulatory cells can modify these conditions. We want to measure these T regulatory cells and learn if these cells do influence these conditions. If we learn that T regulatory cells do affect these conditions, then it may be possible to modify these cells for the benefit of transplant patients.

Condition or disease Intervention/treatment Phase
Leukemia Cancer Lymphoma Lymphoma, Hodgkin Lymphoma, Non-Hodgkin Drug: Ara C Drug: Mesna Drug: Cyclophosphamide Radiation: TBI-Total Body Irradiation Not Applicable

Detailed Description:

Before the transplant we will test the patients blood for viruses which can cause problems after the transplant. These viruses include Hepatitis B, (which causes liver damage), cytomegalovirus, (which causes lung disease) and HIV (which causes AIDS). If the patient is positive for the AIDS virus, they will not be able to undertake the transplant.

The patient will be given 6 doses of chemotherapy with a drug called Ara C in high doses (every 12 hours) which will begin 8 days before their stem cell transplant. Then, another chemotherapy drug called cyclophosphamide will be given in high doses by vein for two days on the 7th and 6th days before their transplant. A drug called MESNA will be given with cyclophosphamide. MESNA is used to decrease the side effects caused by cyclophosphamide. Radiation treatment will be given to the entire body on each day for 4 days before the transplant. This will be done 2 times a day for 4 days. The chemotherapy and radiation treatment will last 8 days. The patient will receive extra radiation treatment if they have certain diseases (central nervous system (CNS) disease, testicular disease or other focal (localized) disease).

The day after the radiation treatment is completed; the patient will receive the healthy stem cells by vein. Once in the bloodstream, these stem cells will go to the bone marrow and should begin to grow

In prevention of GVHD, the patient will also receive medicine called FK506 as well as low dose methotrexate. The FK506 will be given intravenously (through the vein) initially starting 2 days before the transplant and later by mouth (when they are able to take oral medications). This drug will be given each day for several weeks. Four doses of low dose methotrexate will be given intravenously. The methotrexate will be given on the day after the transplant, 3, 6 and 11 days after the transplant. If the GVHD cannot be controlled with FK506, other medicines may need to be given. Your doctor will describe these medicines at that time.

After the patient has their stem cell transplant, we would like to collect some blood at different time points after the transplantation in order to study how regulatory T cells work and grow after a stem cell transplant.

To study how these cells are working in the system, blood samples will be taken each month for six months, at nine months, at one year, 2 years and 3 years following transplant. Approximately 6-8 teaspoons of blood will be collected each time. The total blood drawn for this study over three years should not exceed 1 and 3/4 cups. This amount is considered safe in adults. The amount of blood collected will be decreased in children and/or in patients where this amount of blood collection would not be appropriate. If the patient has a central line, the blood will be taken from it, so that extra needle sticks should not be needed. If the patient does not have a central line, they will need to have one placed. This will be a separate procedure for which the patient will sign a separate consent form. The patient will need to come to the clinic on the days of blood drawing and to be seen at Texas Children's Cancer Center.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 26 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: T-Regulatory Cell Kinetics Post Transplant For Patients Undergoing Matched Sibling Stem Cell Transplantation
Study Start Date : October 2007
Actual Primary Completion Date : May 2013
Actual Study Completion Date : May 2013

Resource links provided by the National Library of Medicine

U.S. FDA Resources

Arm Intervention/treatment
Experimental: Stem Cell Transplant
patient's will be recieving a stem cell transplant on study Conditioning includes: Ara C, Cyclophosphamide, MESNA, TBI-Total Body Irradiation
Drug: Ara C
3000 mg/m^2 - pts will recieve via IV every 12 hours for 6 doses starting at 20:00 hours on day -8
Other Names:
  • Cytarabine
  • Cytosar-U
Drug: Mesna
45 mg/kg; divided into 5 doses-will be administered 15 minutes prior to Cyclophosphamide and 3, 6, 9, and 12 hours after each dose of Cyclophosphamide
Other Name: Mesnex
Drug: Cyclophosphamide
45 mg/kg; IV once daily on day -7 and day -6 starting at 1400 hours
Other Name: Cytoxan
Radiation: TBI-Total Body Irradiation
Total dose 12 Gy, will be delivered in 8 fractions of 150 cGy, each, two fractions per day beginning day -4

Primary Outcome Measures :
  1. Median Percentage of Treg Cells at 1 Year Post Transplant [ Time Frame: 1 Year ]
    The investigative intent is to determine the changes in numbers and function of the regulatory cell population using the best methods to measure this cell population. The frequency of T cells will be summarized at baseline and each time point of follow-up.

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Ages Eligible for Study:   up to 64 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


  • Patients with acute or chronic leukemia or advanced Hodgkin or non Hodgkin lymphoma or myelodysplastic/myeloproliferative disease who are unlikely to be cured by standard chemotherapy treatments. This includes patients who have relapsed after standard chemotherapy treatments and patients in first remission with unfavorable prognostic features.
  • Patient must have a genotype HLA identical stem cell donor.


  • Patients with a life expectancy (less than or equal to 6 weeks) limited by disease other than leukemia.
  • Patients with symptomatic cardiac failure unrelieved by medical therapy or evidence of significant cardiac dysfunction by echocardiogram (shortening fraction <20%).
  • Patients with severe renal disease (i.e., creatinine greater than 3 times normal for age).
  • Patients with pre-existing severe restrictive pulmonary disease (FVC less than 40% of predicted).
  • Patients with severe hepatic disease (direct bilirubin greater than 3 mg/dl or AST greater than 500 IU/L).
  • Patients with severe personality disorder or mental illness.
  • Patients with severe infection that in the estimation of the principal investigator prohibits the use of ablative chemotherapy.
  • Patients who are documented HIV positive.
  • Patients with a Karnofsky performance score <60% or Lansky performance score <50%.

NOTE: Patients who would be excluded from treatment on this protocol strictly for laboratory or performance abnormalities can be included at the principal investigator's discretion after consultation with the members of the SCT Policy and Procedures Committee.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00578461

United States, Texas
Texas Children's Hospital
Houston, Texas, United States, 77030
Sponsors and Collaborators
Baylor College of Medicine
Texas Children's Hospital
Principal Investigator: Robert Krance, MD Baylor College of Medicine

Responsible Party: Robert Krance, Professor, Baylor College of Medicine Identifier: NCT00578461     History of Changes
Obsolete Identifiers: NCT00653289
Other Study ID Numbers: H-19164 REGKINE
First Posted: December 21, 2007    Key Record Dates
Results First Posted: September 8, 2014
Last Update Posted: April 22, 2016
Last Verified: March 2016

Keywords provided by Robert Krance, Baylor College of Medicine:
Stem Cell Transplant
myeloproliferative disease
myelodsyplastic disease
Lymphoma, Hodgkin
Lymphoma, non-Hodgkin

Additional relevant MeSH terms:
Lymphoma, Non-Hodgkin
Hodgkin Disease
Neoplasms by Histologic Type
Lymphoproliferative Disorders
Lymphatic Diseases
Immunoproliferative Disorders
Immune System Diseases
Immunosuppressive Agents
Immunologic Factors
Physiological Effects of Drugs
Antirheumatic Agents
Antineoplastic Agents, Alkylating
Alkylating Agents
Molecular Mechanisms of Pharmacological Action
Antineoplastic Agents
Myeloablative Agonists