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Yan, X.Q. et al.

Yan, Sarmiento, Sun, Huang, Guo, Juan, Van, Qi, Scully, Senaldi, Fletcher,

A novel Notch ligand, Dll4, induces T-cell leukemia/lymphoma when overexpressed in mice by retroviral-mediated gene transfer.

Notch receptors mediate cell-fate decisions through interaction with specific ligands during development. The biological role of a novel Notch ligand, Dll4, in mice was explored by reconstituting lethally irradiated mice with bone marrow (BM) cells transduced with Dll4 retroviral vector. White blood cell and lymphocyte counts in Dll4-overexpressing mice were reduced at the early stage of reconstitution but increased significantly at approximately 10 weeks after BM transplantation. BM, spleen, lymph nodes, and peripheral blood of Dll4-overexpressing mice contained predominantly CD4(+)CD8(+) T cells and virtually lacked B cells. The Dll4-overexpressing mice eventually developed a lethal phenotype that was characterized by the progression of a T-cell lymphoproliferative disease (restricted to BM and lymphoid tissues) to transplantable monoclonal T-cell leukemia/lymphoma scattered to multiple organs. Results suggest that the interaction of Dll4 with Notch1 may provide key signals for T-cell development.[1]

References

A novel Notch ligand, Dll4, induces T-cell leukemia/lymphoma when overexpressed in mice by retroviral-mediated gene transfer. Yan, X.Q., Sarmiento, U., Sun, Y., Huang, G., Guo, J., Juan, T., Van, G., Qi, M.Y., Scully, S., Senaldi, G., Fletcher, F.A. Blood (2001) [Pubmed]

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