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IL-2-induced cellular events
J Gómez1, A González, C Martínez-A
1Department of Immunology and Oncology, Centro Nacional de Biotecnología, Universidad Autónoma, Campus de Cantoblanco, Madrid, Spain.
Critical Reviews in Immunology
|June 24, 1998
Summary
This review details the complex Interleukin-2 (IL-2) receptor signaling pathway. It identifies key molecules and three distinct signaling channels (1, 2, and 3) that regulate cellular responses, including apoptosis.
Area of Science:
- Molecular Biology
- Cellular Signaling
- Immunology
Background:
- Interleukin-2 (IL-2) receptor signaling is crucial for immune responses.
- This process involves numerous molecules, including Ras, Rho, PI3 kinase, PKC, Akt, and transcription factors NF-AT and NF-kappaB.
- Ras and Rho molecules act as dual regulators, influencing both cell survival and apoptosis.
Purpose of the Study:
- To review candidate transducing molecules in signaling processes.
- To delineate the complex IL-2 receptor signaling pathway.
- To present a hierarchical model of three distinct signaling channels.
Main Methods:
- Literature review of signaling pathways.
- Analysis of molecular interactions within the IL-2 receptor pathway.
- Depiction of a hierarchical model of signaling channels.
Main Results:
- Identification of key signaling molecules: Ras, Rho, PI3 kinase, PKC, Akt, NF-AT, NF-kappaB, bcl-2, c-myc, c-jun, and c-fos.
- Delineation of three independent signaling channels: Channel 1 (Lck-c-fos/c-jun), Channel 2 (Syk-myc), and Channel 3 (actin organization/bcl-2 expression).
- Ras and Rho signaling can promote or inhibit apoptosis, highlighting their dual role.
Conclusions:
- The IL-2 receptor signaling pathway is organized into three hierarchical channels.
- This organized pathway regulates critical cellular processes, including gene expression and apoptosis.
- Understanding these signaling channels provides insights into immune cell function and regulation.