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KMID : 0923620090090020035
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Immune Network
2009 Volume.9 No. 2 p.35 ~ p.40
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Rap Signaling in Normal Lymphocyte Development and Leukemia Genesis
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Nagahiro Minato
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Abstract
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Although Rap GTPases of the Ras family remained enigmatic for years, extensive studies in this decade have revealed diverse functions of Rap signaling in the control of cell proliferation, differentiation, survival, adhesion, and movement. With the use of gene-engineered mice, we have uncovered essential roles of endogenous Rap signaling in normal lymphocyte development of both T- and B-lineage cells. Deregulation of Rap signaling, on the other hand, results in the development of characteristic leukemia in manners highly dependent on the contexts of cell lineages. These results highlight crucial roles of Rap signaling in the physiology and pathology of lymphocyte development.
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KEYWORD
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lymphocyte development, leukemia, RapGTPases, Spa-1, Notch
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