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Humanized in vivo bone marrow models orchestrate multi-lineage human hematopoietic cell development

Renou, L.; SUN, W.; Friedrich, C.; Galant, K.; Conrad, C.; Plantier, E.; Schallmoser, K.; Kritsch, L.; Barroca, V.; Devanand, S.; Dechamps, N.; Reinisch, A.; Martinovic, J.; Magnani, A.; Faivre, L.; Calvo, J.; Perie, L.; Kosmider, O.; Pflumio, F.

2024-04-11 cell biology
10.1101/2024.04.08.588553 bioRxiv
Show abstract

Hematopoiesis develops in the bone marrow (BM) where multiple interactions regulate differentiation and preservation of hematopoietic stem/progenitor cells (HSPCs). Although murine BM has been extensively analyzed, the human BM microenvironment remains less understood. Immune-deficient murine models have enabled the analysis of molecular and cellular regulation of human HSPCs, which remains limited as human hematopoietic cells develop in xenogenic microenvironments. In this study, we thoroughly characterized a humanized (h) in vivo BM model, based on mesenchymal stromal cell (MSC) differentiation (called hOssicles (hOss)), and hematopoietic cell compartments generated 3 months post-transplant of CD34+ cells using single-cell RNA sequencing and cellular barcoding. Serial isolation of MSCs and HSPCs from hOss and transplant experiments revealed the dynamic nature of these hBM niches. hOss altered human hematopoietic development by modulating myeloid/lymphoid cell production and HSPC levels. Clonal tracking highlighted hematopoietic cell cross-talks between the murine BM and hOss, indicating the multipotent or more restricted lineage origin of human hematopoiesis shared in the BM sites.

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"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.