Abstract
Bone marrow stromal cells (BMSCs) play pivotal roles in tissue maintenance and regeneration. Their origins, however, remain incompletely understood. Here we identify rare LNGFR+ cells in human fetal and regenerative bone marrow that co-express endothelial and stromal markers. This endothelial subpopulation displays transcriptional reprogramming consistent with endothelial-to-mesenchymal transition (EndoMT) and can generate multipotent stromal cells that reconstitute the bone marrow (BM) niche upon transplantation. Single-cell transcriptomics and lineage tracing in mice confirm robust and sustained contributions of EndoMT to bone precursor and hematopoietic niche pools. Interleukin-33 (IL-33) is overexpressed in subsets of EndoMT cells and drives this conversion process through ST2 receptor signaling. These data reveal generation of tissue-forming BMSCs from mouse and human endothelial cells and may be instructive for approaches to human tissue regeneration.
Original language | English |
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Pages (from-to) | 653-670.e11 |
Journal | Cell Stem Cell |
Volume | 28 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1 Apr 2021 |
Bibliographical note
AcknowledgmentsWe would like to thank Dr. Kirsten van Lom, Dr. Eric Braakman, Lucia Duinhouwer, and Mariëtte ter Borg for providing CD34+ cells and help with human BM sampling; Natalie Papazian for helping to process fetal tissue; Dr. Elwin Rombouts, Peter van Geel, and Michael Vermeulen for operating the BD FACSARIA III; Maria Mylona, Maria Adisty, and Paulette van Strien for performing FACs and RNA-seq; Onno Roovers, Almira Henić, Eline Pronk, Gert-Jan Kremers, Bella Banjanin, Ursula Stalmann, Nils Bayer, and Madelon de Jong for providing technical advice and assistance; Esther Siteur-van Rijnstra and Cynthia van der Linden for providing technical assistance with fetal tissue; Mathias Francois and lab members for help with the lineage tracing experiments; Emma de Pater for advice concerning mouse breeding; members of the Erasmus MC Department of Hematology for scientific discussions; and Egied Simons for assisting with illustrations. This work was supported by an Erasmus MC fellowship award (to M.H.G.P.R.). M.-J.G. and G.S.-D. are supported by the Netherlands CardioVascular Research Initiative: the Dutch Heart Foundation , Dutch Federation of University Medical Centers , Netherlands Organization for Health Research and Development , and the Royal Netherlands Academy of Sciences (grant CVON 2014-11 RECONNECT). G.S.-D. is also sponsored by a trampoline grant (# 22379 ) from AFM-Telethon and FOP Italia (Grant Italia 2020 ). A.L. is supported by the European Union Horizon 2020 Research and Innovation Program under grant agreement 801159 .
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