Abstract
The SCL gene (also known as TAL1) was first identified as a T-cell oncogene. (Begley and Green 1999). It encodes a basic helix-loophelix (bHLH) protein which is normally expressed in blood endothelium and in specific regions of the central nervous system (Green et al. 1992; Hwang et al. 1993; Cross et al. 1994; Kallianpur et al. 1994; Drake et al. 1997). Within the haematopoietic system SCL is expressed in committed erythroid, mast megakaryocytic cells as well as in primitive CD34+ cell lines and bone marrow progenitors. Antisense and over-expression studies have suggested that SCL modulates proliferation and self-renewal of multipotent haemopoietic cells (Green et al. 1991) and also acts as a positive regulator of erythroid differentiation (Aplan et al. 1992). SCL null mice completely lacked yolk sac haemopoiesis (Robb et al. 1995; Shivdasani et al. 1995) and SCL-null ES cells also failed to contribute to any definitive haemopoietic lineage (Porcher et al. 1996; Robb et al. 1996). Existing data therefore demonstrate that SCL plays a pivotal role in the formation or behaviour of haemopoietic stem cells and underline the striking similarities between the role of SCL in haemopoiesis and the function of other bHLH proteins in muscle and neural development.
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Green, A.R. (2003). The Stem Cell Leukaemia Gene: A Critical Regulator of Haemopoiesis Vasculogenesis. In: Hiddemann, W., Haferlach, T., Unterhalt, M., Büchner, T., Ritter, J. (eds) Acute Leukemias IX. Haematology and Blood Transfusion Hämatologie und Bluttransfusion, vol 41. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59358-1_21
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DOI: https://doi.org/10.1007/978-3-642-59358-1_21
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