Abstract:Splice variants of the glycoprotein CD44 (CD44v) that confer metastatic behavior to noninvasively growing rat tumor cells are transiently expressed on lymphocytes during activation. A mAb directed against an epitope encoded by CD44 exon v6 blocks both metastasis formations and lymphocyte activation, implicating CD44v in normal immune function. To explore the nature of this function of CD44v, transgenic mice were generated that constitutively express rat CD44v4-v7 on thymocytes and peripheral T cells. The numbe… Show more
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