HealthyNCT00039650
Pilot Study: Effects of G-CSF on T Cell Function
An observational study of Healthy, run by National Institutes of Health Clinical Center (CC) at 1 site in United States.
Trial summary
This study will evaluate changes in T cells-infection-fighting white blood cells of the immune system-in people given a drug called G-CSF before donating stem cells (immature bone marrow cells) for transplantation. Originally, bone marrow cells were obtained using a needle inserted into the hipbone of the donor. Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Healthy
- How many people
- 15 participants
- Where
- 1 siteUnited States
- Study dates
- May 2002to Mar 2004
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Who may be able to join
- Both male and female subjects will be studied.
- Subjects will be enrolled without regard to their ethnic group.
- Only adults and children 18 years of age or older will be studied.
- Subjects must weigh at least 110 pounds.
Who cannot join
- Any subject that does not pass the health criteria for blood donors established by the American Association of Blood Banks will be excluded.
- Subjects will be excluded if they have any of the following conditions: pregnancy, uncontrolled hypertension, heart disease, history of allergic reactions to G-CSF, history of allergic reactions to E. coli, abnormal hemoglobin or white blood cell counts, a malignancy, or asthma.
- Subjects with family members with conditions that may require a transplant in the future will be excluded.
- Subjects with an enlarged spleen by history or physical exam will be excluded.
- Subjects with hemoglobin less than 12.5 or greater than 19.0 gm/dL, platelet counts less than 150 x 10(9)/L or greater than 500 x 10(9)/L and an absolute neutrophil count of less than 1.5 x 10(9)/L or greater than 10.0 x 10(9)/L will not be eligible.
- Subjects with an abnormal EKG will be excluded from the study.
Show all 9Show fewer
- Pregnant and lactating women will be excluded.
- If a subject's veins are judged to be too small to support the intravenous catheter required for the procedure, they will be excluded.
- If at the time of each apheresis procedure the nurses are unable to obtain adequate antecubital vein access, the subject will be excluded.
Trial locations and contacts
1 site in 1 country.
United States1 site
Warren G. Magnuson Clinical Center (CC)
Bethesda, Maryland, 20892
About this study
Official title: Pilot Study of the Effects of G-CSF on T Cell Function
This study will evaluate changes in T cells-infection-fighting white blood cells of the immune system-in people given a drug called G-CSF before donating stem cells (immature bone marrow cells) for transplantation. Originally, bone marrow cells were obtained using a needle inserted into the hipbone of the donor. However, when it was discovered that immature bone marrow cells also circulate in the blood, scientists began to develop techniques to collect quantities of these cells from the blood instead of the bone. G-CSF is a blood cell growth factor that pushes stem cells from the bone marrow into the bloodstream. Stem cell donors are given this drug 5 to 6 days before donation to make more cells available in the circulating blood for collection.
Stem cell transplantation requires careful regulation of immune cell function to allow the donated stem cells to grow in the transplant recipient, to prevent the transplanted cells from damaging the recipient, and to allow the recipient's new immune system to develop normally so it can fight infections. Studies comparing the outcome of patients transplanted with bone marrow cells with those transplanted with stem cells suggest that the G-CSF given to stem cell donors affects the function of T cells in transplant recipients. This study will collect white cells containing T cells before and after G-CSF administration to determine the effects of the drug on both T cells and stem cells.
Read more
Healthy normal volunteers 18 years of age and older who meet the health criteria for donating blood may participate in this study. Pregnant and breastfeeding women are not eligible.
Participants will undergo the following procedures:
- Blood sample collection (15 milliliters, or 3 teaspoons) to measure blood cell counts
- Electrocardiogram to assess heart function
- Apheresis to donate white blood cells. Participants will undergo two apheresis procedures-once before receiving G-CSF and a second time immediately after finishing the 5-day course of the drug. For this procedure, whole blood is removed using a needle placed in an arm vein. The blood is circulated through a cell separator machine, where the white cells are removed and collected in a plastic bag. The rest of the blood, including the red cells, platelets, and plasma, are returned to the donor through a needle in the other arm. The procedure takes 2 to 3 hours, during which time the donor lies quietly.
Read the detailed description
T cells play a critical role in hematopoietic stem cell transplantation. Many transplant protocols involving HLA matched sibling donors make use of T cell mediated graft-versus-leukemia or graft-versus-cancer effects to clear and/or prevent the recurrent growth of malignant cells. Donor T cells are also responsible for reconstituting cellular immune function following transplantation, but often cause graft-versus-host disease (GVHD). Over the past several years the major source of hematopoietic stem cells for transplantation has changed from marrow to granulocyte-colony stimulating factor (G-CSF)-mobilized peripheral blood stem cells (PBSCs). Despite the fact that patients transplanted with allogeneic G-CSF-mobilized PBSCs receive approximately 10-fold more T-cells than those transplanted with marrow, the incidence and severity of acute GVHD is similar among the two groups, although chronic GVHD is higher in PBSC recipients. Using cellular function assays some investigators have shown that G-CSF affects T cell function. When healthy subjects are given G-CSF, a decrease is seen in the concentration of circulating type 1 helper T cells (Th1) with subsequent falls in the cytokine levels produced by these cells. In contrast, an increase occurs in the concentration of type 2 helper T cells (TH2) and the level of cytokines produced. The purpose of this study is to assess G-CSF-induced changes in T cells. cDNA microarrays will be used to compare genes expressed in CD4 and CD8 cells before and after G-CSF is given. Up to fifteen healthy subjects will be given a typical PBSC mobilization regimen for allogeneic transplants: 10 micrograms/kg/day of G-CSF for 5 days. Peripheral blood mononuclear cells will be collected by apheresis before the mobilization regimen is given and the day after the mobilization is complete. CD4, CD8, and CD34+ cells will be isolated from the peripheral blood mononuclear cells and gene expression will be assessed using cDNA microarrays containing over 8,000 genes.
- Conditions
- Healthy
- Keywords
- Granulocyte Colony-Stimulating Factor, T Cells, Peripheral Blood Stem Cells, Apheresis, Hematopoietic Progenitor Cell Transplantation, Healthy Volunteer, HV, Normal Control
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted7 Jun 2002 (estimated)
- Study startMay 2002
- Study completionMar 2004
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for HealthyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Enrolment
- 15 participants
Sponsor and investigators
- Lead sponsor
- National Institutes of Health Clinical Center (CC)
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00039650
- Sponsor's protocol ID
- 020201
- Other IDs
- 02-CC-0201
- Status last verified
- Mar 2004
- First submitted
- 6 Jun 2002
- Last updated
- 4 Mar 2008
- Results posted
- No
Publications
Bensinger WI, Weaver CH, Appelbaum FR, Rowley S, Demirer T, Sanders J, Storb R, Buckner CD. Transplantation of allogeneic peripheral blood stem cells mobilized by recombinant human granulocyte colony-stimulating factor. Blood. 1995 Mar 15;85(6):1655-8.
PubMed 7534140Korbling M, Przepiorka D, Huh YO, Engel H, van Besien K, Giralt S, Andersson B, Kleine HD, Seong D, Deisseroth AB, et al. Allogeneic blood stem cell transplantation for refractory leukemia and lymphoma: potential advantage of blood over marrow allografts. Blood. 1995 Mar 15;85(6):1659-65.
PubMed 7888684Schmitz N, Dreger P, Suttorp M, Rohwedder EB, Haferlach T, Loffler H, Hunter A, Russell NH. Primary transplantation of allogeneic peripheral blood progenitor cells mobilized by filgrastim (granulocyte colony-stimulating factor). Blood. 1995 Mar 15;85(6):1666-72.
PubMed 7534141
Study at a glance
From the registry record, last updated by the sponsor on 4 Mar 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Pilot Study of the Effects of G-CSF on T Cell Function
- ClinicalTrials.gov ID
- NCT00039650
- Acronym / sponsor ID
- 020201
- Conditions
- Healthy
- Keywords
- Granulocyte Colony-Stimulating Factor, T Cells, Peripheral Blood Stem Cells, Apheresis, Hematopoietic Progenitor Cell Transplantation, Healthy Volunteer, HV, Normal Control
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 15 participants
- Lead sponsor
- National Institutes of Health Clinical Center (CC)US National Institutes of Health
- Study start
- May 2002
- Study completion
- Mar 2004
- First posted
- 7 Jun 2002 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will evaluate changes in T cells-infection-fighting white blood cells of the immune system-in people given a drug called G-CSF before donating stem cells (immature bone marrow cells) for transplantation. Originally, bone marrow cells were obtained using a needle inserted into the hipbone of the donor. However, when it was discovered that immature bone marrow cells also circulate in the blood, scientists began to develop techniques to collect quantities of these cells from the blood instead of the bone. G-CSF is a blood cell growth factor that pushes stem cells from the bone marrow into the bloodstream. Stem cell donors are given this drug 5 to 6 days before donation to make more cells available in the circulating blood for collection.
Stem cell transplantation requires careful regulation of immune cell function to allow the donated stem cells to grow in the transplant recipient, to prevent the transplanted cells from damaging the recipient, and to allow the recipient's new immune system to develop normally so it can fight infections. Studies comparing the outcome of patients transplanted with bone marrow cells with those transplanted with stem cells suggest that the G-CSF given to stem cell donors affects the function of T cells in transplant recipients. This study will collect white cells containing T cells before and after G-CSF administration to determine the effects of the drug on both T cells and stem cells.
Healthy normal volunteers 18 years of age and older who meet the health criteria for donating blood may participate in this study. Pregnant and breastfeeding women are not eligible.
Participants will undergo the following procedures:
- Blood sample collection (15 milliliters, or 3 teaspoons) to measure blood cell counts
- Electrocardiogram to assess heart function
- Apheresis to donate white blood cells. Participants will undergo two apheresis procedures-once before receiving G-CSF and a second time immediately after finishing the 5-day course of the drug. For this procedure, whole blood is removed using a needle placed in an arm vein. The blood is circulated through a cell separator machine, where the white cells are removed and collected in a plastic bag. The rest of the blood, including the red cells, platelets, and plasma, are returned to the donor through a needle in the other arm. The procedure takes 2 to 3 hours, during which time the donor lies quietly.
Detailed description
T cells play a critical role in hematopoietic stem cell transplantation. Many transplant protocols involving HLA matched sibling donors make use of T cell mediated graft-versus-leukemia or graft-versus-cancer effects to clear and/or prevent the recurrent growth of malignant cells. Donor T cells are also responsible for reconstituting cellular immune function following transplantation, but often cause graft-versus-host disease (GVHD). Over the past several years the major source of hematopoietic stem cells for transplantation has changed from marrow to granulocyte-colony stimulating factor (G-CSF)-mobilized peripheral blood stem cells (PBSCs). Despite the fact that patients transplanted with allogeneic G-CSF-mobilized PBSCs receive approximately 10-fold more T-cells than those transplanted with marrow, the incidence and severity of acute GVHD is similar among the two groups, although chronic GVHD is higher in PBSC recipients. Using cellular function assays some investigators have shown that G-CSF affects T cell function. When healthy subjects are given G-CSF, a decrease is seen in the concentration of circulating type 1 helper T cells (Th1) with subsequent falls in the cytokine levels produced by these cells. In contrast, an increase occurs in the concentration of type 2 helper T cells (TH2) and the level of cytokines produced. The purpose of this study is to assess G-CSF-induced changes in T cells. cDNA microarrays will be used to compare genes expressed in CD4 and CD8 cells before and after G-CSF is given. Up to fifteen healthy subjects will be given a typical PBSC mobilization regimen for allogeneic transplants: 10 micrograms/kg/day of G-CSF for 5 days. Peripheral blood mononuclear cells will be collected by apheresis before the mobilization regimen is given and the day after the mobilization is complete. CD4, CD8, and CD34+ cells will be isolated from the peripheral blood mononuclear cells and gene expression will be assessed using cDNA microarrays containing over 8,000 genes.
Study design
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (4 listed)
- Both male and female subjects will be studied.
- Subjects will be enrolled without regard to their ethnic group.
- Only adults and children 18 years of age or older will be studied.
- Subjects must weigh at least 110 pounds.
Key exclusion criteria (9 listed)
- Any subject that does not pass the health criteria for blood donors established by the American Association of Blood Banks will be excluded.
- Subjects will be excluded if they have any of the following conditions: pregnancy, uncontrolled hypertension, heart disease, history of allergic reactions to G-CSF, history of allergic reactions to E. coli, abnormal hemoglobin or white blood cell counts, a malignancy, or asthma.
- Subjects with family members with conditions that may require a transplant in the future will be excluded.
- Subjects with an enlarged spleen by history or physical exam will be excluded.
- Subjects with hemoglobin less than 12.5 or greater than 19.0 gm/dL, platelet counts less than 150 x 10(9)/L or greater than 500 x 10(9)/L and an absolute neutrophil count of less than 1.5 x 10(9)/L or greater than 10.0 x 10(9)/L will not be eligible.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Mar 2008.
- Background: PubMed 7534140Bensinger WI, Weaver CH, Appelbaum FR, Rowley S, Demirer T, Sanders J, Storb R, Buckner CD. Transplantation of allogeneic peripheral blood stem cells mobilized by recombinant human granulocyte colony-stimulating factor. Blood. 1995 Mar 15;85(6):1655-8.
- Background: PubMed 7888684Korbling M, Przepiorka D, Huh YO, Engel H, van Besien K, Giralt S, Andersson B, Kleine HD, Seong D, Deisseroth AB, et al. Allogeneic blood stem cell transplantation for refractory leukemia and lymphoma: potential advantage of blood over marrow allografts. Blood. 1995 Mar 15;85(6):1659-65.
- Background: PubMed 7534141Schmitz N, Dreger P, Suttorp M, Rohwedder EB, Haferlach T, Loffler H, Hunter A, Russell NH. Primary transplantation of allogeneic peripheral blood progenitor cells mobilized by filgrastim (granulocyte colony-stimulating factor). Blood. 1995 Mar 15;85(6):1666-72.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Healthy, run by National Institutes of Health Clinical Center (CC) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Mar 2008. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00039650, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Mar 2008.