Sickle Cell TraitPhase 3NCT00005782
Mobilization and Handling of Stem Cells for Transplant From Healthy Volunteers With Sickle Cell Trait
A Phase 3 study testing Granulocyte colony-stimulating factor and Leukapheresis in people with Sickle Cell Trait, run by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) at 1 site in United States.
Trial summary
This study will examine the effects of granulocyte colony-stimulating factor (G-CSF) on bone marrow stem cells in healthy volunteers with sickle cell trait and determine if cells collected for transplantation from donors with sickle cell trait require special handling. Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Sickle Cell Trait
- What is being tested?
- Granulocyte colony-stimulating factor and Leukapheresis
- Type of treatment
- Surgery or procedure
- How many people
- 12 participants
- Where
- 1 siteUnited States
- Study dates
- Jan 2000to Jul 2002
- Phase
- Phase 3
- 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
Confirmed diagnosis of sickle cell trait.
Greater than age 17.
No active systemic infection or history of recurrent infections requiring intravenous antibiotic treatment .
Normal renal function: creatinine less than 2X normal, or proteinuria less than 1+.
Normal liver function: bilirubin less than 2X normal, transaminases within normal limits.
Normal blood count: WBC 3,000-10,000/mm3, granulocytes greater than 1,500/mm3, platelets greater than 150,000/mm3, hemoglobin greater than 12.5g/dL, MCV and MCHC within normal limits.
Female volunteers of childbearing age should have a negative serum pregnancy test within one week of beginning G-CSF administration.
Eligible for normal blood donation (i.e. tested negative for syphilis (RPR), hepatitis B and C (Hasbro, Anti-Hubcap, Anti-HCV), HIV, and HTLV-1.
Subject must give informed consent to participate in the protocol.
No history of sickle cell crises.
Children less than 18 years of age are excluded as is per routine for normal volunteer protocols.
No active systemic viral, bacterial, fungal, or parasitic infection.
No female volunteers with positive pregnancy test or who are lactating.
No history of autoimmune disease, such as rheumatoid arthritis and systemic lupus erythematosus.
No history of cancer excluding squamous or basal cell carcinoma of the skin.
No history of any malignant hematologic disorders.
No history of cardiovascular disease or related symptoms such as chest pain and shortness of breath..
No allergy to G-CSF or bacterial E. coli products.
No history of G-CSF administration or leukapheresis.
Trial locations and contacts
1 site in 1 country.
United States1 site
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Bethesda, Maryland, 20892
About this study
Official title: Leukapheresis of Volunteers With Sickle Cell Trait to Evaluate Mobilization of Stem Cells With Granulocyte Colony-Stimulating Factor and Stem Cell Collection and Storage for Allogeneic Transplantation
This study will examine the effects of granulocyte colony-stimulating factor (G-CSF) on bone marrow stem cells in healthy volunteers with sickle cell trait and determine if cells collected for transplantation from donors with sickle cell trait require special handling.
Stem cells, which the bone marrow produces, are responsible for making all the different kinds of blood cells. They are the cells used in bone marrow, or stem cell, transplantation. The drug G-CSF, which is a naturally occurring hormone, causes stem cells to mobilize-that is, to be released from the bone marrow and enter the blood stream. This drug is given to stem cell donors to increase the amount of cells that can be collected. Stem cell donors for patients with sickle cell disease are often healthy siblings of the patient who have a matching bone marrow type. Some siblings carry the sickle cell trait, however, and, even though they do not have sickle cell disease and their blood and bone marrow are normal, it is not known how their cells will react to G-CSF stimulation. Nor is it known if their stem cells require special methods of removal, processing or storing.
Read more
Healthy volunteers 18 years or older with sickle cell trait who have no history of sickle cell disease and no known medical problems may be eligible for this study. Participants will have a medical history and physical examination, including blood tests and urinalysis. They will receive injections of G-CSF under the skin once a day for 5 days. On the fifth day, stem cells will be collected through leukapheresis. In this procedure, whole blood is drawn from an arm vein, similar to donating whole blood. The blood then circulates through a cell separator machine, the stem cells are removed, and the rest of the blood is transfused back to the donor through a vein in the other arm.
The information gained from this study will be used to ensure the safety of stem cell donors with sickle cell trait and to better prepare stem cells for transplantation in sickle cell patients.
Read the detailed description
Patients with sickle cell disease are increasingly becoming eligible for transplantation as the techniques of stem cell transplantation continue to improve, leading to less morbidity and mortality. However, the availability of a matched donor still remains one of the main obstacles. Given the inherited nature of this disease, many HLA-matched siblings of patients with sickle cell disease have sickle cell trait. Therefore, patients with sickle cell trait presumably have been used as donors for patients with sickle cell disease. However, there are no published data on whether special manipulations are required for the maintenance and storage of stem cells collected from patients with sickle cell trait. The effects of granulocyte-colony stimulating factor (G-CSF)-induced stem cell mobilization in these patients are also not known. Also, due to the potential of HbS gellation in red cells, the freezing of stem cells derived from individuals with sickle cell trait may require a more stringent red cell removal than is normally performed. We would like to evaluate these issues using volunteers with sickle cell trait prior to beginning our own transplant protocol for sickle cell disease.
- Conditions
- Sickle Cell Trait
- Being tested
- Granulocyte colony-stimulating factor, Leukapheresis
- Keywords
- Donor Apheresis, Sickle Cell Trait, Red Cell Alloimmunization
- Medical subject headings
- Sickle Cell Trait
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Granulocyte colony-stimulating factorDrug
LeukapheresisProcedure or surgery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Jun 2000 (estimated)
- Study startJan 2000
- Study completionJul 2002
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Sickle Cell TraitStudies of the same condition, open and under way.
- More trials run by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)The sponsor's other registered studies.
- 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
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Enrolment
- 12 participants
Sponsor and investigators
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00005782
- Sponsor's protocol ID
- 000060
- Other IDs
- 00-DK-0060
- Status last verified
- Jul 2002
- First submitted
- 3 Jun 2000
- Last updated
- 4 Mar 2008
- Results posted
- No
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
- Leukapheresis of Volunteers With Sickle Cell Trait to Evaluate Mobilization of Stem Cells With Granulocyte Colony-Stimulating Factor and Stem Cell Collection and Storage for Allogeneic Transplantation
- ClinicalTrials.gov ID
- NCT00005782
- Acronym / sponsor ID
- 000060
- Conditions
- Sickle Cell Trait
- Keywords
- Donor Apheresis, Sickle Cell Trait, Red Cell Alloimmunization
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 12 participants
- Lead sponsor
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)US National Institutes of Health
- Study start
- Jan 2000
- Study completion
- Jul 2002
- First posted
- 5 Jun 2000 (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 examine the effects of granulocyte colony-stimulating factor (G-CSF) on bone marrow stem cells in healthy volunteers with sickle cell trait and determine if cells collected for transplantation from donors with sickle cell trait require special handling.
Stem cells, which the bone marrow produces, are responsible for making all the different kinds of blood cells. They are the cells used in bone marrow, or stem cell, transplantation. The drug G-CSF, which is a naturally occurring hormone, causes stem cells to mobilize-that is, to be released from the bone marrow and enter the blood stream. This drug is given to stem cell donors to increase the amount of cells that can be collected. Stem cell donors for patients with sickle cell disease are often healthy siblings of the patient who have a matching bone marrow type. Some siblings carry the sickle cell trait, however, and, even though they do not have sickle cell disease and their blood and bone marrow are normal, it is not known how their cells will react to G-CSF stimulation. Nor is it known if their stem cells require special methods of removal, processing or storing.
Healthy volunteers 18 years or older with sickle cell trait who have no history of sickle cell disease and no known medical problems may be eligible for this study. Participants will have a medical history and physical examination, including blood tests and urinalysis. They will receive injections of G-CSF under the skin once a day for 5 days. On the fifth day, stem cells will be collected through leukapheresis. In this procedure, whole blood is drawn from an arm vein, similar to donating whole blood. The blood then circulates through a cell separator machine, the stem cells are removed, and the rest of the blood is transfused back to the donor through a vein in the other arm.
The information gained from this study will be used to ensure the safety of stem cell donors with sickle cell trait and to better prepare stem cells for transplantation in sickle cell patients.
Detailed description
Patients with sickle cell disease are increasingly becoming eligible for transplantation as the techniques of stem cell transplantation continue to improve, leading to less morbidity and mortality. However, the availability of a matched donor still remains one of the main obstacles. Given the inherited nature of this disease, many HLA-matched siblings of patients with sickle cell disease have sickle cell trait. Therefore, patients with sickle cell trait presumably have been used as donors for patients with sickle cell disease. However, there are no published data on whether special manipulations are required for the maintenance and storage of stem cells collected from patients with sickle cell trait. The effects of granulocyte-colony stimulating factor (G-CSF)-induced stem cell mobilization in these patients are also not known. Also, due to the potential of HbS gellation in red cells, the freezing of stem cells derived from individuals with sickle cell trait may require a more stringent red cell removal than is normally performed. We would like to evaluate these issues using volunteers with sickle cell trait prior to beginning our own transplant protocol for sickle cell disease.
Study design
- Primary purpose
- Treatment
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Granulocyte colony-stimulating factor | Drug | – |
| Leukapheresis | Procedure or surgery | – |
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.
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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?
A Phase 3 study testing Granulocyte colony-stimulating factor and Leukapheresis in people with Sickle Cell Trait, run by National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) at 1 site in United States.
The full registered description is in the About this study section and the official record.
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.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
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?
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.