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Impact of Closed PBSC Collection With Reduced Gas-Phase Oxygen Exposure on Graft Quality and Early Engraftment in Allo-HSCT

6 de novembro de 2026 atualizado por: Institute of Hematology & Blood Diseases Hospital, China

A Prospective Exploratory Study on the Impact of a Closed Peripheral Blood Stem Cell Collection Procedure Based on Reducing Gas-Phase Oxygen Exposure on Graft Functional Quality and Early Engraftment Kinetics in Allogeneic Hematopoietic Stem Cell Transplantation

This study aims to establish a closed PBSC collection procedure with reduced gas-phase oxygen exposure and to verify its impact on graft functional quality and clinical engraftment efficiency. To evaluate whether an apheresis procedure involving adequate priming with sterile saline to eliminate gas-phase air, followed by collection into a closed collection bag without gas-phase air exposure, creates a relatively low-oxygen collection environment, and to explore its effects on CD34⁺ HSPC function and early engraftment kinetics after transplantation.

Participants will: Be prospectively and consecutively enrolled. The experimental procedure involves adequate priming of the apheresis circuit and collection bag with sterile saline, elimination of visible gas-phase air, followed by closed PBSC collection. Donors in the control group will undergo the center's previous standard PBSC collection procedure.

The pO₂ of the collection product will serve as the core indicator for process validation. CD34⁺ HSPC functional indicators will also be assessed, and recipient engraftment kinetics will be followed up.

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Tipo de estudo

Intervencional

Inscrição (Estimado)

240

Estágio

  • Não aplicável

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Estude backup de contato

Locais de estudo

    • Tianjin Municipality
      • Tianjin, Tianjin Municipality, China, 300020
        • National Clinical Research Center for Blood Diseases, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College Hospital

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

18 anos a 65 anos (Adulto, Adulto mais velho)

Aceita Voluntários Saudáveis

Sim

Gêneros Elegíveis para o Estudo

Tudo

Descrição

Inclusion Criteria:

  1. Healthy donors or related/unrelated donors scheduled to undergo peripheral blood hematopoietic stem cell apheresis; if autologous collection is performed for the patient, the sample may be included in the process validation cohort as an exploratory sample.
  2. Donors meet current standards for hematopoietic stem cell donation and apheresis, and the investigator judges that PBSC collection can be completed.
  3. The corresponding recipient is scheduled to undergo allogeneic hematopoietic stem cell transplantation using PBSC as the graft source.
  4. Both the donor and recipient have signed informed consent; if only ex vivo testing of the collection product is performed and recipient outcome analysis is not included, informed consent may be obtained only from the donor and as required by relevant ethics requirements.

Exclusion Criteria:

  1. Donors with severe organ dysfunction or other conditions considered unsuitable for peripheral blood stem cell (PBSC) mobilization and apheresis, including any of the following:

    1. Cardiovascular dysfunction: New York Heart Association (NYHA) class III-IV heart failure, or clinically significant cardiovascular disease such as uncontrolled severe arrhythmia, unstable angina, or recent myocardial infarction.
    2. Pulmonary dysfunction: resting hypoxemia or severe pulmonary dysfunction that may compromise the safety of PBSC mobilization or apheresis.
    3. Hepatic dysfunction: alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >3 × the upper limit of normal (ULN), decompensated cirrhosis, or other severe active liver disease.
    4. Renal dysfunction: estimated glomerular filtration rate (eGFR) ≤30 mL/min/1.73 m² or requirement for dialysis.
    5. Coagulation disorders: active bleeding or clinically significant coagulation abnormalities considered to substantially increase the risk of bleeding associated with venipuncture, central venous catheterization, or apheresis; Infection: active, uncontrolled severe infection.
    6. Other conditions that, in the opinion of the donor-evaluating physician, may substantially increase the risks associated with granulocyte colony-stimulating factor (G-CSF) mobilization or PBSC apheresis.
  2. A reliable closed collection system is not expected to be established during apheresis, or the required sampling cannot be completed.

  3. Research sampling of the collection product cannot be performed due to urgent clinical reasons.

  4. The investigator judges that participation in the study may increase unacceptable risks to the donor or recipient.

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Low-Oxygen Closed PBSC Collection

Participants will undergo closed PBSC collection after adequate priming of the apheresis circuit and collection bag with sterile saline and elimination of visible gas-phase air. Donors in the control group will undergo the center's previous standard PBSC collection procedure.

Sem intervenção: Standard PBSC Collection

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Time to Neutrophil Engraftment
Prazo: Up to Day 30 post-transplant

Time from transplant infusion to the first day of absolute neutrophil count (ANC) ≥ 0.5 × 10⁹/L maintained for 3 consecutive days in recipients receiving PBSC products collected using a closed apheresis procedure without gas-phase air exposure.

Up to Day 30 post-transplant

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
pO₂ of PBSC Collection Product
Prazo: Immediately after PBSC collection

pO₂ level in PBSC collection products collected using a closed apheresis procedure without gas-phase air exposure.

Immediately after PBSC collection
ROS Levels in CD34⁺ Cells
Prazo: Day 0 (at collection)

ROS levels in CD34⁺ hematopoietic stem and progenitor cells (HSPCs) collected using a closed apheresis procedure without gas-phase air exposure.

Day 0 (at collection)
CD34⁺ HSPC Viability
Prazo: Day 0 (at collection)

Percentage of viable CD34⁺ hematopoietic stem and progenitor cells (HSPCs) in PBSC products collected using a closed apheresis procedure without gas-phase air exposure.

Day 0 (at collection)
CFU Formation Capacity of CD34⁺ HSPCs
Prazo: Day 0 (at collection)

Colony-forming unit (CFU) formation capacity of CD34⁺ hematopoietic stem and progenitor cells (HSPCs) in PBSC products collected using a closed apheresis procedure without gas-phase air exposure.

Day 0 (at collection)
Correlation Between Collection Product pO₂ and Time to ANC Engraftment
Prazo: Up to Day 100 post-transplant

Correlation coefficient between pO₂ level in PBSC collection products and time to absolute neutrophil count (ANC) engraftment in recipients after transplant.

Up to Day 100 post-transplant
Correlation Between Collection Product pO₂ and Time to PLT Engraftment
Prazo: Up to Day 100 post-transplant

Correlation coefficient between pO₂ level in PBSC collection products and time to platelet (PLT) engraftment in recipients after transplant.

Up to Day 100 post-transplant
Time to Platelet Engraftment
Prazo: Up to Day 100 post-transplant

Time from transplant infusion to the first day of platelet count ≥ 20 × 10⁹/L maintained for 7 consecutive days without platelet transfusion in recipients receiving PBSC products collected by low-oxygen closed apheresis compared with standard apheresis.

Up to Day 100 post-transplant
Incidence of Poor Engraftment
Prazo: Up to Day 100 post-transplant

Proportion of recipients with poor graft function (PGF), defined as cytopenia in at least two cell lineages persisting beyond Day 28 post-transplant with full donor chimerism and absence of relapse or severe GVHD, in recipients receiving PBSC products collected by low-oxygen closed apheresis compared with standard apheresis.

Up to Day 100 post-transplant
Early Donor Chimerism
Prazo: Up to Day 100 post-transplant

Percentage of donor-derived cells (donor chimerism) in recipients after transplant, assessed by flow cytometry.

Up to Day 100 post-transplant
Incidence of Donor Adverse Events During and After PBSC Collection
Prazo: From enrollment to Day 30 post-transplant

Incidence and severity of adverse events in donors during and after PBSC collection using a closed apheresis procedure without gas-phase air exposure, graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) v5.0.

From enrollment to Day 30 post-transplant
Incidence of Recipient Adverse Events After Transplant
Prazo: From transplant to Day 30 post-transplant

Incidence and severity of adverse events in recipients from transplant to Day 30 post-transplant after receiving PBSC products collected using a closed apheresis procedure without gas-phase air exposure, graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) v5.0.

From transplant to Day 30 post-transplant

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Estimado)

1 de novembro de 2026

Conclusão Primária (Estimado)

30 de outubro de 2029

Conclusão do estudo (Estimado)

30 de outubro de 2029

Datas de inscrição no estudo

Enviado pela primeira vez

24 de setembro de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

23 de outubro de 2026

Primeira postagem (Real)

29 de outubro de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

9 de novembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

6 de novembro de 2026

Última verificação

1 de novembro de 2026

Mais Informações

Termos relacionados a este estudo

Outros números de identificação do estudo

  • IIT2026109

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Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

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