Araújo AB, Salton GD, Angeli MH, Furlan JM, Schmalfuss T, Röhsig LM. Effects of cell concentration, time of fresh storage, and cryopreservation on peripheral blood stem cells: PBSC fresh storage and cryopreservation.
Transfus Apher Sci 2021;
61:103298. [PMID:
34696981 DOI:
10.1016/j.transci.2021.103298]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/14/2021] [Accepted: 10/17/2021] [Indexed: 10/20/2022]
Abstract
INTRODUCTION
Peripheral blood stem cells are widely used in autologous or allogeneic transplantation. The quality of the product directly impacts clinical outcomes, and the cell quality and/or functionality may be influenced by the storage conditions as time, temperature, total nucleated cells (TNC) concentration and cryopreservation requirement.
OBJECTIVE
To verify the effects of time, cell concentration, and cryopreservation/thawing in the viability and functionality of stem cells for transplantation.
METHODS
We evaluated TNC, CD45+ viable cells, CD34+ viable cells, and cell viability and functionality of 11 samples. Measurements were performed immediately and 24 h, 48 h, 72 h, and 96 h after sample collection at high and low TNC concentrations. The same parameters were also evaluated after cryopreservation and thawing of the samples.
RESULT
Duration of storage and TNC concentration exhibited a negative effect on cell quality (CD45+ viable cells, CD34+ viable cells and functionality). Moreover, the association of these parameters increased the negative effect on graft quality. Cryopreservation and thawing also negatively affected the collected sample regarding viable CD34+ cells (recovery 66.2 %), viable CD45+ cells (recovery 56.8 %), and 7-AAD viability. No significant losses in viable CD45+/CD34+ cells and functionality were observed in the first 24 h in both TNC conditions.
CONCLUSION
These results emphasize the importance to consider carefully the storage conditions until transplantation, measuring TNC/μL until 24 h after collection (diluting the product when TNC > 300 × 103/μL) and infusing fresh graft as soon as possible.
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