Phase 1
N=15
Peripheral Blood Stem Cell Collection for Sickle Cell Disease (SCD) Patients
Sickle Cell Disease
Bottom Line
View on ClinicalTrials.gov: NCT03226691 ↗Enrolled (actual)
15
Serious AEs
20.0%
Results posted
Apr 2020
Primary outcome: Primary: Number of Participants With Sufficient Collection of Hemopoietic Stem Cells (HSCs) Without Serious Adverse Events — 14 Participants
Study Design & Population
- Study type
- Interventional
- Phase
- Phase 1
- Interventions
- Plerixafor (Drug)
- Age
- Adult, Older Adult · 18+ yrs
- Sex
- All
- Sponsor
- National Heart, Lung, and Blood Institute (NHLBI)
- Primary completion
- Feb 2019
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Number of Participants With Sufficient Collection of Hemopoietic Stem Cells (HSCs) Without Serious Adverse Events |
14 | — |
Summary
The constitution of blood relies upon hematopoietic stem cells (HSCs), which stay in the bone marrow and differentiate to all lineages of peripheral blood cells. HSC transplantation is the only curative option currently available for sickle cell disease (SCD) patients either via allogeneic HSC transplantation or HSC-targeted gene therapy. Granulocyte-colony stimulating factor (G-CSF)- mobilized HSCs are frequently utilized in the adult setting of HSC transplantation because of the faster hematologic recovery as compared to bone marrow. As an autologous HSC source for gene therapy, bone marrow harvest has been generally employed since G-CSF has been prohibitive in SCD patients due to granulocyte stimulation and the associated reports of vaso-occlusive crises, multi-organ failure, and death. However, when bone marrow harvest is used, the amounts of collected cells are limited and anesthesia is required. In order to obtain HSCs in large numbers without anesthesia, patients will undergo mobilization followed by large volume apheresis. Plerixafor is an alternative treatment for mobilization without direct stimulation to granulocytes, and it is theoretically applicable for SCD patients. The primary endpoint of this study is to obtain sufficient amounts of HSCs collected from the peripheral blood in SCD patients after plerixafor
mobilization with an acceptable safety profile. The harvested products will be stored as backup for patients undergoing gene therapy as well as allogeneic HSC transplantation.
Eligibility Criteria
- INCLUSION CRITERIA:
- SCD patients who are 18 or older, and (a) planned to enroll in an active allogeneic HSCT study where back-up autologous HSCs are needed; OR (b) are eligible for an allogeneic HSCT study (i.e. have the same disease severity as group (a), but no active allogeneic HSCT study is available), and are willing to donate autologous HSCs for a future gene therapy, gene editing, or allogeneic HSCT study.
- Adequate renal function: serum/plasma creatinine 3,000/mm^3, granulocytes >1,000/mm^3, hemoglobin>7.0g/dL, platelets>150,000/mm^3.
- Female patients of childbearing age should have a negative serum pregnancy test within one week of beginning plerixafor administration, have had a hysterectomy, post-menopausal, or absence of a menses for over a year.
- Meets NIH Department of Transfusion Medicine (DTM) eligibility criteria for blood component donation for in vitro research use (negative serologic tests for syphilis, hepatitis B and C, HIV, and HTLV-1).
- Ability to give informed consent to participate in the protocol.
- Female and male individuals of reproductive potential must agree to one of the contraceptive regimens stated above if sexually active
EXCLUSION CRITERIA
- Pregnancy. Female patients of childbearing age should have a negative serum pregnancy test within one week of beginning plerixafor administration, except those that have had a hysterectomy, post-menopausal, or an absence of a menses for over a year.
- Active viral, bacterial, fungal, or parasitic infection.
- History of cancer, excluding squamous carcinoma of the skin and cervical carcinoma in situ.
- Active and painful splenomegaly or splenomegaly (size greater than upper limit of normal) determined by ultrasound.
- Allergy to plerixafor.
Data sourced from ClinicalTrials.gov (NCT03226691). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.