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Single cell transcriptome analysis reveals an essential role for Gata2b in hematopoietic lineage decisions in zebrafish

Gioacchino, E.; Koyunlar, C.; de Looper, H.; de Jong, M.; Dobrzycki, T.; Hoogenboezem, R.; Zink, J.; Bosch, D.; van Strien, P.; van Royen, M. E.; French, P.; Bindels, E.; Monteiro, R.; Gussinklo, K. J.; Touw, I. P.; de Pater, E.

2019-09-01 immunology
10.1101/753178 bioRxiv
Show abstract

Hematopoietic stem cells (HSCs) are tightly controlled to keep a balance between myeloid and lymphoid cell differentiation. Gata2 is a pivotal hematopoietic transcription factor required for HSC generation and maintenance. We generated a zebrafish mutant for the mammalian Gata2 orthologue, gata2b. We found that in adult zebrafish, gata2b is required for both neutrophilic- and monocytic lineage differentiation. Single cell transcriptome analysis revealed that the myeloid defect present in Gata2b deficient zebrafish arise in the most immature hematopoietic stem and progenitor cell (HSPC) compartment and that this population is instead committed towards the lymphoid and erythroid lineage. Taken together, we find that Gata2b is vital for the fate choice between the myeloid and lymphoid lineages.

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