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Roo, J.J.D. de; Chhatta, A.; Garcia-Perez, L.; Naber, B.A.E.; Vloemans, S.A.; Salvatori, D.C.F.; ... ; Staal, F.J.T. (2022)

Axin2/Conductin is required for normal hematopoiesis and T lymphopoiesis

Article / Letter to editor
The development of T lymphocytes in the thymus and their stem cell precursors in the bone marrow is controlled by Wnt signaling in strictly regulated, cell-type specific dosages. In this study, we investigated levels of canonical Wnt signaling during hematopoiesis and T cell development within the Axin2-mTurquoise2 reporter. We demonstrate active Wnt signaling in hematopoietic stem cells (HSCs) and early thymocytes, but also in more mature thymic subsets and peripheral T lymphocytes. Thymic epithelial cells displayed particularly high Wnt signaling, suggesting an interesting crosstalk between thymocytes and thymic epithelial cells (TECs). Additionally, reporter mice allowed us to investigate the loss of Axin2 function, demonstrating decreased HSC repopulation upon transplantation and the partial arrest of early thymocyte development in Axin2(Tg/Tg) full mutant mice. Mechanistically, loss of Axin2 leads to supraphysiological Wnt levels that disrupt HSC differentiation and thymocyte...Show moreThe development of T lymphocytes in the thymus and their stem cell precursors in the bone marrow is controlled by Wnt signaling in strictly regulated, cell-type specific dosages. In this study, we investigated levels of canonical Wnt signaling during hematopoiesis and T cell development within the Axin2-mTurquoise2 reporter. We demonstrate active Wnt signaling in hematopoietic stem cells (HSCs) and early thymocytes, but also in more mature thymic subsets and peripheral T lymphocytes. Thymic epithelial cells displayed particularly high Wnt signaling, suggesting an interesting crosstalk between thymocytes and thymic epithelial cells (TECs). Additionally, reporter mice allowed us to investigate the loss of Axin2 function, demonstrating decreased HSC repopulation upon transplantation and the partial arrest of early thymocyte development in Axin2(Tg/Tg) full mutant mice. Mechanistically, loss of Axin2 leads to supraphysiological Wnt levels that disrupt HSC differentiation and thymocyte development.Show less
WNT- thymus-hematopoietic stem cell
All authors
Roo, J.J.D. de; Chhatta, A.; Garcia-Perez, L.; Naber, B.A.E.; Vloemans, S.A.; Salvatori, D.C.F.; Pike-Overzet, K.; Mikkers, H.; Staal, F.J.T.
Date
2022-09-01
Journal
Cells
Volume
11
Issue
17
DOI
doi:10.3390/cells11172679