Abstract
BackgroundThe AABB-ISCT Joint Working Group Stability Project Team (SPT) was assigned to roadmap a path toward standardization of cryopreserved hematopoietic stem/progenitor cell (HSPC) stability programs. HSPC stability encompasses a broad scope of conditions including non-frozen (“fresh”) and cryopreserved cell products, and varying methods for storage, thaw, and administration. This report assessed current practices and focused solely on cryopreserved HSPC cell therapy products to establish preliminary recommendations for a stability program roadmap. MethodsA survey was prepared by the SPT and distributed to ISCT and AABB members. Survey results were summarized and recommendations were outlined based on the responses from the survey. This report highlights current practices for cryopreserved HSPC stability programs, including additional considerations and recommendations. Results and DiscussionEighty-two (82) centers worldwide participated in the survey. Survey results indicate variability across programs. HSPC stability depends on multiple factors within the processing facility (e.g., cryopreservation techniques, reagents used, and storage temperature) and independent variables (e.g., donor-related factors and starting material variability). While retention of hematopoietic engraftment potential is the primary goal for cryopreserved HSPC stability, engraftment results should not be used as the sole metric for stability programs. Based on the survey results, the SPT provides recommendations for consideration. ConclusionsThe SPT recommendations for best practices are not intended to replace existing standards. The survey results emphasize the need for the community to optimize best practices and consider initiating collaborative projects to improve the standardization of cryopreserved HSPC stability programs for cell therapy products.
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