Perturbation of Fetal Liver Hematopoietic Stem and Progenitor Cell Development by Trisomy 21
Overview
Authors
Affiliations
The 40-fold increase in childhood megakaryocyte-erythroid and B-cell leukemia in Down syndrome implicates trisomy 21 (T21) in perturbing fetal hematopoiesis. Here, we show that compared with primary disomic controls, primary T21 fetal liver (FL) hematopoietic stem cells (HSC) and megakaryocyte-erythroid progenitors are markedly increased, whereas granulocyte-macrophage progenitors are reduced. Commensurately, HSC and megakaryocyte-erythroid progenitors show higher clonogenicity, with increased megakaryocyte, megakaryocyte-erythroid, and replatable blast colonies. Biased megakaryocyte-erythroid-primed gene expression was detected as early as the HSC compartment. In lymphopoiesis, T21 FL lymphoid-primed multipotential progenitors and early lymphoid progenitor numbers are maintained, but there was a 10-fold reduction in committed PreproB-lymphoid progenitors and the functional B-cell potential of HSC and early lymphoid progenitor is severely impaired, in tandem with reduced early lymphoid gene expression. The same pattern was seen in all T21 FL samples and no samples had GATA1 mutations. Therefore, T21 itself causes multiple distinct defects in FL myelo- and lymphopoiesis.
Childhood leukaemia in Down's syndrome primed by blood-cell bias.
Malinge S Nature. 2024; 634(8032):40-42.
PMID: 39322696 DOI: 10.1038/d41586-024-02785-9.
Single-cell multi-omics map of human fetal blood in Down syndrome.
Marderstein A, De Zuani M, Moeller R, Bezney J, Padhi E, Wong S Nature. 2024; 634(8032):104-112.
PMID: 39322663 PMC: 11446839. DOI: 10.1038/s41586-024-07946-4.
Down syndrome-associated leukaemias: current evidence and challenges.
Mason N, Cahill H, Diamond Y, McCleary K, Kotecha R, Marshall G Ther Adv Hematol. 2024; 15:20406207241257901.
PMID: 39050114 PMC: 11268035. DOI: 10.1177/20406207241257901.
GATA1 in Normal and Pathologic Megakaryopoiesis and Platelet Development.
Takasaki K, Chou S Adv Exp Med Biol. 2024; 1459:261-287.
PMID: 39017848 DOI: 10.1007/978-3-031-62731-6_12.
Patterns of Aneuploidy and Signaling Consequences in Cancer.
Zhakula-Kostadinova N, Taylor A Cancer Res. 2024; 84(16):2575-2587.
PMID: 38924459 PMC: 11325152. DOI: 10.1158/0008-5472.CAN-24-0169.