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Cytokine signal transduction
1Columbia University, Dept. of Medicine, New York, NY 10032, USA.
Abstract:
The normal growth, maturation, and activation of cells in most tissues requires stimulation with a defined set of growth factors. These growth factors bind cognate receptors on surface of target cells, and stimulate specific intracellular signals. Many of these signals culminate in the induction of a ligand-specific set of genes. The characterization of signaling components that mediate the induction of genes in response to IFNs has led to the identification of a new signal transduction pathway. The components of this pathway are able to rapidly transduce high fidelity signals directly from the receptor to the nucleus. Recently, many other cytokines and growth factors, including IFN-alpha, IFN-gamma, IL-6, and prolactin (PRL), have been shown to induce new genes through the same signaling paradigm.
Insights
Cellular growth requires specific growth factors that trigger intracellular signals, leading to gene induction. A newly identified signaling pathway rapidly transmits these signals from the receptor to the nucleus for various cytokines.
Area of Science:
- Cellular Biology
- Molecular Signaling
- Genetics
Background:
- Normal cell growth, maturation, and activation depend on growth factor stimulation.
- Growth factors bind cell surface receptors, initiating specific intracellular signals.
- These signals often result in the induction of ligand-specific genes.
Purpose of the Study:
- To characterize signaling components mediating gene induction by Interferons (IFNs).
- To identify and describe a novel signal transduction pathway.
- To explore the role of this pathway in response to various cytokines and growth factors.
Main Methods:
- Characterization of signaling components.
- Analysis of signal transduction pathways.
- Investigating gene induction mechanisms.
Main Results:
- Identification of a novel signal transduction pathway.
- This pathway rapidly transmits high-fidelity signals from receptor to nucleus.
- Similar signaling paradigms were observed for Interferon-alpha, Interferon-gamma, Interleukin-6, and Prolactin.
Conclusions:
- A conserved signaling pathway mediates gene induction by IFNs and other cytokines.
- This pathway is crucial for rapid and accurate signal transmission to the nucleus.
- The findings expand the understanding of cytokine and growth factor signaling.