Variable CD34+ recovery of cryopreserved allogeneic HPC products: transplant implications during the COVID-19 pandemic.
Blood Adv
; 4(17): 4147-4150, 2020 09 08.
Article
in English
| MEDLINE | ID: covidwho-744958
ABSTRACT
Donor registries and transplantation societies recommend cryopreservation of unrelated donor hemopoietic progenitor cell (HPC) products before the recipient commences conditioning therapy to mitigate the donor and travel risks associated with the COVID-19 pandemic. However, little is known regarding the postthaw quality of such allogeneic products or the effect of precryopreservation storage and processing on these characteristics. We investigated the postthaw CD34+ cell recovery and viability of 305 allogeneic HPC products cryopreserved at 9 laboratories across Australia. Median postthaw CD34+ cell recovery was 76% and ranged from 6% to 122%. Longer transit time before cryopreservation, white cell count (WCC) during storage, and complex product manipulation before cryopreservation were independently associated with inferior postthaw CD34+ cell recovery. Longer precryopreservation transit time and WCC were also associated with inferior postthaw CD34+ cell viability. We conclude that although postthaw CD34+ cell recovery and viability of cryopreserved allogeneic HPC is generally acceptable, there is a significant risk of poor postthaw product quality, associated with prolonged storage time, higher WCC, and complex product manipulation precryopreservation. Awareness of expected postthaw recovery and practices that influence it will assist collection, processing, and transplant centers in optimizing outcomes for transplant recipients.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Hematopoietic Stem Cells
/
Cryopreservation
/
Antigens, CD34
Type of study:
Observational study
/
Prognostic study
Limits:
Humans
Language:
English
Journal:
Blood Adv
Year:
2020
Document Type:
Article
Affiliation country:
Bloodadvances.2020002431
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