Impact of Closed PBSC Collection With Reduced Gas-Phase Oxygen Exposure on Graft Quality and Early Engraftment in Allo-HSCT
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.
A tanulmány áttekintése
Állapot
Beavatkozás / kezelés
Tanulmány típusa
Beiratkozás (Becsült)
Fázis
- Nem alkalmazható
Kapcsolatok és helyek
Tanulmányi kapcsolat
- Név: erlie jiang
- Telefonszám: 02223608600
- E-mail: jiangerlie@ihcams.ac.cn
Tanulmányozza a kapcsolattartók biztonsági mentését
- Név: yigeng cao
- Telefonszám: 18622477066
- E-mail: caoyigeng@ihcams.ac.cn
Tanulmányi helyek
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Tianjin Municipality
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Tianjin, Tianjin Municipality, Kína, 300020
- National Clinical Research Center for Blood Diseases, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College Hospital
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Részvételi kritériumok
Jogosultsági kritériumok
Tanulmányozható életkorok
Egészséges önkénteseket fogad
Tanulmányozható nemek
Leírás
Inclusion Criteria:
- 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.
- Donors meet current standards for hematopoietic stem cell donation and apheresis, and the investigator judges that PBSC collection can be completed.
- The corresponding recipient is scheduled to undergo allogeneic hematopoietic stem cell transplantation using PBSC as the graft source.
- 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:
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Donors with severe organ dysfunction or other conditions considered unsuitable for peripheral blood stem cell (PBSC) mobilization and apheresis, including any of the following:
- 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.
- Pulmonary dysfunction: resting hypoxemia or severe pulmonary dysfunction that may compromise the safety of PBSC mobilization or apheresis.
- Hepatic dysfunction: alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >3 × the upper limit of normal (ULN), decompensated cirrhosis, or other severe active liver disease.
- Renal dysfunction: estimated glomerular filtration rate (eGFR) ≤30 mL/min/1.73 m² or requirement for dialysis.
- 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.
- 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.
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A reliable closed collection system is not expected to be established during apheresis, or the required sampling cannot be completed.
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Research sampling of the collection product cannot be performed due to urgent clinical reasons.
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The investigator judges that participation in the study may increase unacceptable risks to the donor or recipient.
Tanulási terv
Hogyan készül a tanulmány?
Tervezési részletek
- Elsődleges cél: Kezelés
- Kiosztás: Véletlenszerűsített
- Beavatkozó modell: Párhuzamos hozzárendelés
- Maszkolás: Nincs (Open Label)
Fegyverek és beavatkozások
Résztvevő csoport / kar |
Beavatkozás / kezelés |
|---|---|
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Kísérleti: Low-Oxygen Closed PBSC Collection
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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. |
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Nincs beavatkozás: Standard PBSC Collection
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Mit mér a tanulmány?
Elsődleges eredményintézkedések
Eredménymérő |
Intézkedés leírása |
Időkeret |
|---|---|---|
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Time to Neutrophil Engraftment
Időkeret: Up to Day 30 post-transplant
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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
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Másodlagos eredményintézkedések
Eredménymérő |
Intézkedés leírása |
Időkeret |
|---|---|---|
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pO₂ of PBSC Collection Product
Időkeret: Immediately after PBSC collection
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pO₂ level in PBSC collection products collected using a closed apheresis procedure without gas-phase air exposure. |
Immediately after PBSC collection
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ROS Levels in CD34⁺ Cells
Időkeret: Day 0 (at collection)
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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)
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CD34⁺ HSPC Viability
Időkeret: Day 0 (at collection)
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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)
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CFU Formation Capacity of CD34⁺ HSPCs
Időkeret: Day 0 (at collection)
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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)
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Correlation Between Collection Product pO₂ and Time to ANC Engraftment
Időkeret: Up to Day 100 post-transplant
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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
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Correlation Between Collection Product pO₂ and Time to PLT Engraftment
Időkeret: Up to Day 100 post-transplant
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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
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Time to Platelet Engraftment
Időkeret: Up to Day 100 post-transplant
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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
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Incidence of Poor Engraftment
Időkeret: Up to Day 100 post-transplant
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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
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Early Donor Chimerism
Időkeret: Up to Day 100 post-transplant
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Percentage of donor-derived cells (donor chimerism) in recipients after transplant, assessed by flow cytometry. |
Up to Day 100 post-transplant
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Incidence of Donor Adverse Events During and After PBSC Collection
Időkeret: From enrollment to Day 30 post-transplant
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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
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Incidence of Recipient Adverse Events After Transplant
Időkeret: From transplant to Day 30 post-transplant
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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
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Együttműködők és nyomozók
Tanulmányi rekorddátumok
Tanulmány főbb dátumok
Tanulmány kezdete (Becsült)
Elsődleges befejezés (Becsült)
A tanulmány befejezése (Becsült)
Tanulmányi regisztráció dátumai
Először benyújtva
Először nyújtották be, amely megfelel a minőségbiztosítási kritériumoknak
Első közzététel (Tényleges)
Tanulmányi rekordok frissítései
Utolsó frissítés közzétéve (Tényleges)
Az utolsó frissítés elküldve, amely megfelel a minőségbiztosítási kritériumoknak
Utolsó ellenőrzés
Több információ
A tanulmányhoz kapcsolódó kifejezések
További vonatkozó MeSH feltételek
Egyéb vizsgálati azonosító számok
- IIT2026109
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