EVALUATION OF THE EFFECTIVENESS OF PERIPHERAL BLOOD STEM CELL PROCESSING AND CRYOPRESERVATION AT CHO RAY HOSPITAL

Kim Thảo Lê1, , Ngọc Mai Nguyễn1, Thị Bé Út Nguyễn1, Thị Hoa Mai Trịnh1, Thị Mỹ Linh Nguyễn1, Thị Thuỳ Dung Phạm1, Hoàng Hưng Lê1, Lê Thảo Như Bùi1, Thị Thuý Hà Hoàng1
1 Bệnh viện Chợ Rẫy

Main Article Content

Abstract

Objective: To evaluate the effectiveness of the processing and cryopreservation procedure for peripheral blood stem cells (PBSCs) at Cho Ray Hospital during 2024–2025.


Methods: A retrospective cross-sectional descriptive study was conducted on 35 PBSC units collected, processed, cryopreserved, and used for hematopoietic stem cell transplantation at Cho Ray Hospital from January 2024 to December 2025.


Main findings: The mean processing-to-storage time was 3.3 ± 0.47 hours; the mean storage bag volume was 125.4 ± 13.54 mL; the mean cell concentration was 2.0 ± 0.9 × 10⁸ cells/mL; and the median storage duration was 44 days. After thawing, both the absolute number of viable CD34⁺ cells and the percentage of viable CD34⁺ cells decreased significantly compared with pre-storage values (p < 0.001). The median recovery rate of viable CD34⁺ cells was 84.89% (IQR: 17.38%), while the median preservation rate of viable CD34⁺ cells was 97.92% (IQR: 4.63%). No processing-related factor showed an independent statistically significant association with the recovery rate of viable CD34⁺ cells after thawing.


Conclusions: The PBSC processing and cryopreservation procedure at Cho Ray Hospital demonstrated good cell preservation efficiency, maintaining high recovery and viability of CD34⁺ cells after thawing.

Article Details

References

1. Đỗ Quang Linh, Nguyễn Bá Khanh, Lê Xuân Thịnh, Trần Ngọc Quế, Nguyễn Văn Thanh. Chất lượng khối tế bào gốc máu ngoại vi sau bảo quản đông lạnh tại Ngân hàng Tế bào gốc - Viện Huyết học - Truyền máu Trung ương giai đoạn 2014-2023. Tạp chí Y học Việt Nam. 2024;544(11):275-282.
2. American Association of Blood Banks (AABB). Standards for Cellular Therapy Services. 9th ed. Bethesda (MD): AABB; 2023.
3. Araújo A, Salton G, Angeli M, Furlan J, Schmalfuss T, Röhsig L. Effects of cell concentration, time of fresh storage, and cryopreservation on peripheral blood stem cells. Transfus Apher Sci. 2021.
4. Foundation for the Accreditation of Cellular Therapy (FACT). FACT–JACIE International Standards for Hematopoietic Cellular Therapy Product Collection, Processing, and Administration. 8th ed. Omaha (NE): FACT; 2021.
5. Liseth K, et al. The viability of cryopreserved PBPC depends on the DMSO concentration and the concentration of nucleated cells in the graft. Cytotherapy. 2005;7(4):328-333.
6. Lysák D, Brychtová M, Leba M, Cedikova M, Georgiev D, Jindra P, et al. Long-term cryopreservation does not affect quality of peripheral blood stem cell grafts: a comparative study of native, short-term and long-term cryopreserved hematopoietic stem cells. Cell Transplant. 2021;30:09636897211036004.
7. Novitzky-Basso I, et al. Impact of ex vivo time, cell density and cryopreservation on allogeneic stem cell grafts. Cytotherapy. 2025.
8. Purtill D, Antonenas V, Chiappini P, Tong D, O’Flaherty E, Bajel A, et al. Variable CD34+ recovery of cryopreserved allogeneic HPC products. Blood Adv. 2020;4:4147-4150.
9. Sartor M, Antonenas V, Garvin F, Webb M, Bradstock KF. Recovery of viable CD34+ cells from cryopreserved hemopoietic progenitor cell products. Bone Marrow Transplant. 2005;36(3):199-204.