Delta-1 Enhances Marrow and Thymus Repopulating Ability of Human CD34(+)CD38(-) Cord Blood Cells
Overview
Affiliations
We investigated the effect of Notch signaling, a known regulator of cell fate in numerous developmental systems, on human hematopoietic precursors. We show that activation of endogenous Notch signaling in human CD34(+)CD38(-) cord blood precursors with immobilized Delta-1 in serum-free cultures containing fibronectin and hematopoietic growth factors inhibited myeloid differentiation and induced a 100-fold increase in the number of CD34(+) cells compared with control cultures. Immobilized Delta-1 also induced a multifold expansion of cells with the phenotype of common lymphoid precursors (CD34(+)CD7(+)CD45RA(+)) and promoted the development of cytoplasmic CD3(+) T/NK cell precursors. IL-7 enhanced the promotion of T/NK cell differentiation by immobilized Delta-1, but granulocytic differentiation occurred when G-CSF was added. Transplantation into immunodeficient mice showed a substantial increase in myeloid and B cell engraftment in the marrow and also revealed thymic repopulation by CD3(+) T cells due to cells being cultured for a longer period with immobilized Delta-1. These data suggest that Delta-1 can enhance myeloid and lymphoid marrow-repopulating ability and promote the generation of thymus-repopulating T cell precursors.
Cis inhibition of NOTCH1 through JAGGED1 sustains embryonic hematopoietic stem cell fate.
Thambyrajah R, Maqueda M, Neo W, Imbach K, Guillen Y, Grases D Nat Commun. 2024; 15(1):1604.
PMID: 38383534 PMC: 10882055. DOI: 10.1038/s41467-024-45716-y.
Ex vivo expansion of human hematopoietic stem cells and clinical applications.
Sakurai M, Ishitsuka K, Becker H, Yamazaki S Cancer Sci. 2024; 115(3):698-705.
PMID: 38221718 PMC: 10921004. DOI: 10.1111/cas.16066.
Progress on methods of T lymphocyte development .
Li Y, Chen X Zhejiang Da Xue Xue Bao Yi Xue Ban. 2023; 51(4):491-499.
PMID: 37202105 PMC: 10265001. DOI: 10.3724/zdxbyxb-2021-0369.
In Vitro Human Haematopoietic Stem Cell Expansion and Differentiation.
Bozhilov Y, Hsu I, Brown E, Wilkinson A Cells. 2023; 12(6).
PMID: 36980237 PMC: 10046976. DOI: 10.3390/cells12060896.
Development and clinical advancement of small molecules for expansion of hematopoietic stem cell.
Li J, Wang X, Ding J, Zhu Y, Min W, Kuang W Acta Pharm Sin B. 2022; 12(6):2808-2831.
PMID: 35755294 PMC: 9214065. DOI: 10.1016/j.apsb.2021.12.006.