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Crit Rev Immunol. 1998;18(3):185-220.

IL-2-induced cellular events.

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Department of Immunology and Oncology, Centro Nacional de Biotecnología, Universidad Autónoma, Campus de Cantoblanco, Madrid, Spain.


In this review we discuss several molecules that are attractive candidates as transducing molecules involved in signaling processes. IL-2 receptor signaling is a complex process involving a large number of molecules: Ras, Rho, PI3 kinase, PKC, Akt, transcription factors NF-AT, and NF-kappaB and some target genes such as bcl-2, c-myc, c-jun and c-fos. Ras and Rho have been defined as dual molecules because Ras- and Rho-initiated signals can either promote or inhibit apoptosis. Several studies have contributed to the delineation of a signaling pathway structured in three independent channels designated channels 1, 2, and 3. These three channels serve as major landmarks: Lck-c-fos/c-jun (channel 1), Syk-myc (channel 2), and a pathway leading to actin organization/bcl-2 expression (channel 3). The detailed hierarchical organization of these three channels is presented throughout the review and the model is depicted in the figure.

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