Peripheral Blood Stem Cell Collection From Patients With Sickle Cell Disease (SCD) Using Plerixafor

Sponsor
St. Jude Children's Research Hospital (Other)
Overall Status
Recruiting
CT.gov ID
NCT04817345
Collaborator
Doris Duke Charitable Foundation (Other)
15
1
1
7
2.2

Study Details

Study Description

Brief Summary

With recent advances in gene editing, gene therapy is becoming a viable curative treatment option for sickle cell disease. In order to do genetic manipulation, investigators need to collect hematopoietic stem cells from patients with sickle cell disease. In this study, investigators want to study the safety and feasibility of collecting peripheral blood stem cells from pediatric and young adult patients with sickle cell disease after administering plerixafor. Studying these peripheral blood stem cells will help in optimizing the yield of peripheral CD34+ cells from pediatric and young adult patients with sickle cell disease, which in turn will help to develop better gene therapies for these patients.

Primary Objectives

  • Determine the safety profile associated with administration of plerixafor in pediatric and young adult patients with sickle cell disease (SCD).

  • To estimate the number of CD34+ cells/kg of body weight that can be collected with peripheral apheresis after administration of plerixafor in pediatric and young adult patients with SCD.

Exploratory Objectives

  • To describe the kinetics of CD34+ cell mobilization in peripheral blood after - + cells obtained from pediatric and young adult patients with SCD.

  • To study the effect of hydroxyurea therapy on senescence in plerixafor-mobilized CD34+ cells obtained from pediatric and young adult patients with SCD.

Condition or Disease Intervention/Treatment Phase
Phase 2

Detailed Description

Participants will be enrolled sequentially, and no two participants will undergo drug administration, mobilization or apheresis at the same time. A subsequent participant can only receive the study drug when the previous participant has been safely apheresed and discharged from the hospital. In the first stratum of the study only adult participants (18-25 years of age) will be enrolled. Once plerixafor and apheresis has been shown to be safe and acceptable in at least 5 adult participants, the study will enroll participants in the pediatric stratum. Pediatric stratum will not be activated until all the patients in the adult stratum have been evaluated and completed participation with acceptable results. In the pediatric stratum, older children (14 years old and above) will be enrolled before younger children (10-14 years old). After 10 participants, 14 years and older, have safely completed the study participation, younger children 10-14 years old will be allowed to participate.

Prophylactic red blood cell exchange or simple red cell transfusions will be given within 7 days prior to plerixafor administration to participants targeting HbS <30% to reduce the incidence of vaso-occlusive crisis and other events that may be associated with high hemoglobin S levels.Hydroxyurea treatment should be stopped 4 weeks before mobilization. Plerixafor administration and apheresis will be timed for participants already receiving chronic transfusion therapy such that the plerixafor administration and apheresis coincides with regularly timed transfusion.

Participants undergoing hematopoietic stem cell (HSC) mobilization will receive a daily-dose subcutaneous administration of plerixafor (Mozobil®) at 0.24 mg/kg on up to 2 consecutive days. Leukapheresis will start approximately 4 hours after each dose of plerixafor is given. This process lasts 4-10 hours.

Participants will be followed for 30 days after the last dose of plerixafor and then taken off study.

Study Design

Study Type:
Interventional
Anticipated Enrollment :
15 participants
Allocation:
N/A
Intervention Model:
Single Group Assignment
Masking:
None (Open Label)
Primary Purpose:
Supportive Care
Official Title:
Peripheral Blood Stem Cell Collection From Patients With Sickle Cell Disease (SCD) Using Plerixafor
Anticipated Study Start Date :
Sep 1, 2022
Anticipated Primary Completion Date :
Apr 1, 2023
Anticipated Study Completion Date :
Apr 1, 2023

Arms and Interventions

Arm Intervention/Treatment
Experimental: Plerixafor

Participants will receive a subcutaneous dose of 0.24 mg/kg of plerixafor once daily (Q24hr) x 2 days.

Drug: Plerixafor
Subcutaneous
Other Names:
  • Mozobil â„¢
  • Outcome Measures

    Primary Outcome Measures

    1. Number of participants with sufficient collection of hematopoietic stem cells (HSCs) without serious adverse events. [2 days]

      Sufficient collection of HSCs from peripheral blood after plerixafor mobilization without serious adverse events (SAEs)

    Eligibility Criteria

    Criteria

    Ages Eligible for Study:
    10 Years to 25 Years
    Sexes Eligible for Study:
    All
    Accepts Healthy Volunteers:
    No
    Inclusion Criteria:
    • Patients with severe SCD who are 10-25 years old and are willing to donate autologous HSCs for advancing future gene therapy for SCD. Parents/legal guardians of participants must be able and willing to consent for their participation in this study. Severe SCD, for the purpose of this study, will be defined as patients who are receiving chronic transfusion therapy due to SCD related complications. The need for undergoing chronic transfusion therapy must be determined by the primary hematologist. Some patients may continue to receive hydroxyurea in addition to and simultaneously with blood transfusion therapy. Such patients are eligible for inclusion on the study if they hold hydroxyurea for at least 4 weeks. The ability to hold hydroxyurea (or not) with ongoing chronic transfusion therapy will be made by the primary hematologist as well. All genotypes of SCD will be eligible.

    • Adequate renal function: serum/plasma creatinine < 1.5 mg/dL and creatinine clearance

    50 mL/min (as calculated by the Crockcroft-Gault formula).

    • Adequate liver function: direct bilirubin < 2.5 times the upper limit of normal range, AST and ALT < 5 times the upper limit of normal range.

    • Blood counts: WBC > 3,000/mm3, granulocytes > 1,000/mm3, hemoglobin > 7.0 g/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, be post-menopausal.

    • Negative serologic tests for syphilis, hepatitis B and C, HIV, and HTLV-1/II.

    • Participants should either have a central line in place or be able to undergo apheresis without the necessity of the insertion of a central venous catheter

    • Participants of childbearing potential should agree to use of an effective form of contraception during treatment and for at least 1 week after the last dose of plerixafor.

    • ECOG performance status/Karnofsky score/Lansky score >80.

    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, or are post-menopausal.

    • 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) or splenic sequestration determined by ultrasound.

    • Previous history of splenomegaly or splenic sequestration, unless HbS level of <30% is documented within 48-72 hours of each plerixafor dose

    • Allergy to plerixafor.

    • Patients receiving hydroxyurea will not be included in the study. However, they may be included if the primary hematologist determines that hydroxyurea can be safely discontinued for at least 4 weeks prior to the plerixafor administration and apheresis. Generally, patients receiving chronic transfusion therapy can safely discontinue hydroxyurea therapy as there is unlikely to be any added benefit, but this will be determined by the primary treating hematologist.

    • Poor cardiac function, as defined by an ejection fraction < 40%.

    • History of clinically proven pulmonary hypertension.

    • Emergency room admission or hospitalization in the past 14 days prior to first dose of study drug.

    • Major surgery in the past 30 days prior to first dose of study drug.

    Contacts and Locations

    Locations

    Site City State Country Postal Code
    1 St. Jude Children's Research Hospital Memphis Tennessee United States 38105

    Sponsors and Collaborators

    • St. Jude Children's Research Hospital
    • Doris Duke Charitable Foundation

    Investigators

    • Principal Investigator: Akshay Sharma, MBBS, St. Jude Children's Research Hospital
    • Principal Investigator: Mitch Weiss, MD, PhD, St. Jude Children's Research Hospital

    Study Documents (Full-Text)

    None provided.

    More Information

    Additional Information:

    Publications

    None provided.
    Responsible Party:
    St. Jude Children's Research Hospital
    ClinicalTrials.gov Identifier:
    NCT04817345
    Other Study ID Numbers:
    • ASPIRES2
    First Posted:
    Mar 26, 2021
    Last Update Posted:
    Aug 25, 2022
    Last Verified:
    Aug 1, 2022
    Individual Participant Data (IPD) Sharing Statement:
    Yes
    Plan to Share IPD:
    Yes
    Studies a U.S. FDA-regulated Drug Product:
    Yes
    Studies a U.S. FDA-regulated Device Product:
    No
    Keywords provided by St. Jude Children's Research Hospital
    Additional relevant MeSH terms:

    Study Results

    No Results Posted as of Aug 25, 2022