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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Thymic overexpression of Ttg-1 in transgenic mice results in T-cell acute lymphoblastic leukemia/lymphoma.

T-cell translocation gene 1 (Ttg-1), also called rhombotin, is deregulated upon translocation into the alpha/delta T-cell receptor loci in acute lymphoblastic leukemias bearing the t(11;14)(p15;q11). Ttg-1 encodes a nuclear protein, expressed predominantly in neuronal cells, which belongs to a novel family of transcription factors possessing LIM domains. We utilized the lck proximal promoter to overexpress this candidate oncogene in immature thymocytes of transgenic mice. lckPr Ttg-1 mice develop immature, aggressive T-cell leukemia/lymphomas. Tumor incidence is proportional to the level of Ttg-1 expression. Most tumors contain CD4+8+ cells as well as CD4-8+ cells, which have an immature rather than a mature peripheral phenotype. Ttg-1-induced tumorigenesis preferentially affects a minority population of thymocytes representing an immature CD4-8+ intermediate stage between double-negative CD4-8- cells and double-positive CD4+8+ cells. This model indicates that the aberrant expression of putative transcription factors plays a primary role in the genesis of T-cell acute lymphoblastic leukemias.[1]


  1. Thymic overexpression of Ttg-1 in transgenic mice results in T-cell acute lymphoblastic leukemia/lymphoma. McGuire, E.A., Rintoul, C.E., Sclar, G.M., Korsmeyer, S.J. Mol. Cell. Biol. (1992) [Pubmed]
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