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Updated: Oct 5, 2025
Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
Published on: March 2, 2014
Role of EGF Receptor Regulatory Networks in the Host Response to Viral Infections
1Department of Molecular Biology and Microbiology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States.
Abstract:
In this review article, we will first provide a brief overview of EGF receptor (EGFR) structure and function, and its importance as a therapeutic target in epithelial carcinomas. We will then compare what is currently known about canonical EGFR trafficking pathways that are triggered by ligand binding, versus ligand-independent pathways activated by a variety of intrinsic and environmentally induced cellular stresses. Next, we will review the literature regarding the role of EGFR as a host factor with critical roles facilitating viral cell entry and replication. Here we will focus on pathogens exploiting virus-encoded and endogenous EGFR ligands, as well as EGFR-mediated trafficking and signaling pathways that have been co-opted by wild-type viruses and recombinant gene therapy vectors. We will also provide an overview of a recently discovered pathway regulating non-canonical EGFR trafficking and signaling that may be a common feature of viruses like human adenoviruses which signal through p38-mitogen activated protein kinase. We will conclude by discussing the emerging role of EGFR signaling in innate immunity to viral infections, and how viral evasion mechanisms are contributing to our understanding of fundamental EGFR biology.
Insights
Epidermal Growth Factor Receptor (EGFR) is crucial for epithelial carcinomas and viral infections. Understanding its trafficking and signaling pathways offers insights into cancer therapy and innate immunity against viruses.
Area of Science:
- Molecular Biology
- Cell Biology
- Virology
Background:
- The Epidermal Growth Factor Receptor (EGFR) is a key therapeutic target in epithelial carcinomas.
- EGFR signaling is implicated in both canonical ligand-dependent and non-canonical ligand-independent pathways.
- Viruses utilize EGFR as a host factor for cell entry and replication.
Purpose of the Study:
- To review EGFR structure, function, and therapeutic relevance in cancer.
- To compare canonical and non-canonical EGFR trafficking pathways.
- To explore EGFR's role in viral pathogenesis and innate immunity.
Main Methods:
- Literature review of EGFR structure, function, and signaling.
- Analysis of EGFR's role in viral cell entry and replication.
- Discussion of EGFR's involvement in innate immunity and viral evasion.
Main Results:
- EGFR plays a critical role in epithelial carcinomas and viral infections.
- Both ligand-dependent and ligand-independent EGFR pathways are involved in viral processes.
- Non-canonical EGFR trafficking, exemplified by adenoviruses, involves p38-MAPK signaling.
- EGFR signaling is emerging as a significant factor in innate immunity to viruses.
Conclusions:
- EGFR is a multifaceted protein involved in cancer and viral pathogenesis.
- Understanding EGFR's diverse roles can lead to novel therapeutic strategies.
- Viral exploitation of EGFR enhances our knowledge of fundamental EGFR biology and innate immunity.
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