Abstract
The improvement of hematopoietic stem and progenitor cell (HSPC) engraftment remains a high-priority goal when limited cell doses are available, such as in cord blood (CB) transplantation and HSC gene therapy. We observed that monocytes are highly effective at improving the engraftment of both CB-CD34+ and lentivirus-transfected CD34+ cells in a xenogeneic model of HSC transplantation. Moreover, monocytes, in particular the CD14+CD16− classical subset, in co-culture systems increase survival and stemness of CB-CD34+ cells. Both soluble factors and direct-cell contact interactions, such as JAG/NOTCH and COX-2/PGE2 pathways, are critically involved in the HSC-monocyte crosstalk. Our results indicate that the infusion of monocytes improves engraftment when cell dose is a limiting factor.
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The authors declare that all data supporting the findings of this study are available within the article and its supplementary information files.
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Acknowledgements
We would like to thank Fondazione Matilde Tettamanti, Comitato Maria Letizia Verga, and Fondazione MBBM for their generous support. This work was supported by Blood Cancer UK.
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AP and VG collection and assembly of data, data analysis and interpretation, manuscript writing; GD collection and assembly of data; LA statistical analysis; SO provision of study material or patients; BG, AG, and AB manuscript reviewing and editing; FD and MS conception and design, manuscript writing and final approval of manuscript.
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Pievani, A., Granata, V., Desantis, G. et al. CD14 positive cells accelerate hematopoietic stem cell engraftment. Bone Marrow Transplant 57, 942–948 (2022). https://doi.org/10.1038/s41409-022-01662-1
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DOI: https://doi.org/10.1038/s41409-022-01662-1