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Stem Cell Mobilization and Apheresis for Life-threatening Blood Disorders

18 mai 2026 mis à jour par: St. Jude Children's Research Hospital

The purpose of this study is to investigate mobilization and collection of HSPCs in patients with bone marrow failure syndromes (BMFS) using granulocyte-colony stimulating factor (otherwise known as Filgrastim) with plerixafor to demonstrate safety and feasibility of collecting HSPCs to advance gene therapy.

Primary objective:

- To characterize the safety of Filgrastim plus plerixafor in participants with bone marrow failure syndromes as determined by the incidence of adverse events (AEs).

Secondary Objectives:

  • To characterize the feasibility of HSPC mobilization using Filgrastim plus plerixafor as determined by peripheral blood CD34+ counts.
  • To measure the mobilization effects of Filgrastim plus plerixafor in the peripheral blood in participants as determined by peak peripheral blood CD34+ counts.
  • To estimate efficacy of Filgrastim plus plerixafor for HSPC mobilization and apheresis collection in participants as determined by the yield of CD34+ cells (CD34+ cells/kg).

Aperçu de l'étude

Description détaillée

This is a phase I, open-label, single-center study to evaluate the safety of Filgrastim plus plerixafor stem cell mobilization and apheresis in patients with BMFS. This study will include a screening period with labs, physical examination, and bone marrow evaluation at least 6 months prior to mobilization and apheresis, an intervention period that includes mobilization and apheresis of patient HSPCs, and outpatient follow-up within 7-10 days after intervention. Study staff will follow up with the participant via telephone approximately 30 days after mobilization and apheresis. A bone marrow evaluation will be done within 6 months post-intervention.

Type d'étude

Interventionnel

Inscription (Estimé)

12

Phase

  • La phase 1

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Lieux d'étude

    • Tennessee
      • Memphis, Tennessee, États-Unis, 38105-2794
        • Saint Jude Children's Research Hospital
        • Contact:

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

  • Adulte

Accepte les volontaires sains

Non

La description

Inclusion Criteria:

  • Participants with a bone marrow failure syndrome with an identified genetic cause willing to donate autologous HSPCs for advancing gene therapy
  • Age ≥ 18 years - 25 years
  • The following hematological parameters need to be met (regardless of transfusion or growth factor support)

    • Hb > 8 g/dL
    • ANC > 500/mm3
    • Platelet > 30,000/mm3
  • Bone marrow evaluation within the preceding 6 months prior to mobilization and apheresis
  • Participants should either have a central venous catheter (CVC) in place, be able to undergo apheresis without requiring a CVC, or agree to having a temporary apheresis catheter placed
  • Karnofsky score >80
  • Negative serologic tests for syphilis, hepatitis B and C, HIV, and HTLV-1/II
  • Female participants of childbearing age should have a negative serum pregnancy test within one week of beginning Filgrastim and plerixafor administration

Exclusion Criteria:

  • Participant with sickle cell disease
  • Participant who has had a prior autologous or allogeneic HSCT
  • Active viral, bacterial, fungal, or parasitic infection
  • Total bilirubin >2.5x ULN or transaminases >5x ULN
  • Moderate or severe renal failure defined as serum/plasma creatinine >1.5 mg/dL and an estimated glomerular filtration rate (eGFR) < 60 mL/min/1.73 m2 based on the CKD-Epi equation or the St. Jude equation
  • Diagnosis of MDS or other hematologic malignancy
  • History of malignancy
  • Known allergy to or contraindication for Filgrastim or plerixafor administration, or medications routinely administered during apheresis
  • Splenomegaly (size greater than upper limit of normal on examination)
  • Any disease or concomitant process that is not compatible with the study as per investigator opinion
  • Concomitant treatment with alternative investigational agent or participation in another clinical trial with an investigational drug within 5 half-lives of the investigational agent
  • Unwillingness to use a highly effective method of contraception for 1 month after plerixafor or GCSF
  • Pregnancy
  • Inability or unwillingness of research participant to give written informed consent.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Autre
  • Répartition: N / A
  • Modèle interventionnel: Affectation à un seul groupe
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: BDSTEM Treatment

Participants in this study will receive a twice daily dose of Filgrastim (GCSF) (5 mcg/kg BID) SQ starting on day 1 for 5 days followed by a single dose of SQ plerixafor (0.24 mg/kg) on day 5 followed by collection of CD34+ HSPCs via apheresis.

A portion of cells collected from the participant will be stored as backup to be used toward future gene therapy endeavors. The remaining cells will be donated for research studies

Administered twice daily dose starting on day 1 for 5 days.
Administered on day 5 via IV.
Peripheral venous access or through a central venous catheter approximately 4-5 hours after the dose of plerixafor is given.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Incidence of treatment-emergent adverse events following filgrastim plus plerixafor administration
Délai: From initiation of drug administration through Day +7 to +10 follow-up
Safety will be assessed by the incidence, type, and severity of adverse events occurring after administration of filgrastim plus plerixafor in participants with bone marrow failure syndromes.
From initiation of drug administration through Day +7 to +10 follow-up

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Number of participants achieving peripheral blood CD34+ counts ≥5 cells/µL
Délai: From initiation of plerixafor administration through completion of apheresis, or 6 hours after drug administration if apheresis is not performed
Feasibility of hematopoietic stem and progenitor cell mobilization will be assessed by peripheral blood CD34+ cell counts measured after plerixafor administration and prior to or during apheresis.
From initiation of plerixafor administration through completion of apheresis, or 6 hours after drug administration if apheresis is not performed
Peripheral blood CD34+ kinetics following filgrastim plus plerixafor administration
Délai: After plerixafor administration through completion of apheresis, or 6 hours after drug administration if apheresis is not performed
Peripheral blood CD34+ cell counts will be measured after plerixafor administration and prior to or during apheresis.
After plerixafor administration through completion of apheresis, or 6 hours after drug administration if apheresis is not performed
Observed CD34+ cell yield after 1 blood volume apheresis
Délai: At completion of 1 blood volume apheresis on Day 5
CD34+ cell yield (CD34+ cells/kg) collected after processing 1 blood volume during apheresis following filgrastim plus plerixafor administration.
At completion of 1 blood volume apheresis on Day 5
Estimated total CD34+ cell yield from projected full-volume apheresis
Délai: At completion of 1 blood volume apheresis on Day 5
Estimated total CD34+ cell yield (CD34+ cells/kg) projected from the observed yield after processing 1 blood volume during apheresis.
At completion of 1 blood volume apheresis on Day 5

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Les enquêteurs

  • Chercheur principal: Alexis Leonard, MD, St. Jude Children's Research Hospital

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Estimé)

1 juin 2026

Achèvement primaire (Estimé)

1 décembre 2028

Achèvement de l'étude (Estimé)

1 juillet 2029

Dates d'inscription aux études

Première soumission

16 avril 2026

Première soumission répondant aux critères de contrôle qualité

8 mai 2026

Première publication (Réel)

13 mai 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

22 mai 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

18 mai 2026

Dernière vérification

1 mai 2026

Plus d'information

Termes liés à cette étude

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

OUI

Description du régime IPD

Individual participant de-identified datasets containing the variables analyzed in the published article will be made available (related to the study primary or secondary objectives contained in the publication). Supporting documents such as the protocol, statistical analyses plan, and informed consent are available through the CTG website for the specific study. Data used to generate the published article will be made available at the time of article publication. Investigators who seek access to individual level de-identified data will contact the computing team in the Department of Biostatistics (ClinTrialDataRequest@stjude.org) who will respond to the data request.

Délai de partage IPD

Data will be made available at the time of article publication.

Critères d'accès au partage IPD

Data will be provided to researchers following a formal request with the following information: full name of requestor, affiliation, data set requested, and timing of when data is needed. As an informational point, the lead statistician and study principal investigator will be informed that primary results datasets have been requested.

Type d'informations de prise en charge du partage d'IPD

  • PROTOCOLE D'ÉTUDE
  • SÈVE
  • CIF

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Oui

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

Essais cliniques sur Filgrastim

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