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Updated: Dec 26, 2025

Validated Immunochemical Assay for Comprehensive Determination of the Human Epidermal Growth Factor Receptor 2 Released from and Bound to Cells
Published on: May 9, 2025
Epidermal growth factor receptor (EGFR) involvement in epithelial-derived cancers and its current antibody-based
1Department of Molecular Genetics, Donnelly Centre, University of Toronto, 160 College Street, Toronto, ON, M5S 3E1, Canada.
Abstract:
The epidermal growth factor receptor (EGFR) is a transmembrane glycoprotein that is part of the family of tyrosine kinase receptors. The binding of EGFR to its cognate ligands leads to its autophosphorylation and subsequent activation of the signal transduction pathways involved in regulating cellular proliferation, differentiation, and survival. Accordingly, this receptor carries out both redundant and restricted functions in the germline development of mammals and in the maintenance of various adult tissues. Correspondingly, the loss of EGFR regulation results in many human diseases, with the most notable cancer. This receptor is overexpressed and/or mutated in multiple epithelial-derived tumors, and associated with poor prognosis and survival in cancer patients. Here, we discuss in detail the role of EGFR in specific epithelial-derived cancer pathologies; these include lung cancer, colorectal cancer, and squamous cell carcinomas. The development of multiple anticancer agents against EGFR diminished the progression and metastasis of tumors. Some of the most versatile therapeutic anti-EGFR agents include the monoclonal antibodies (mAbs), demonstrating success in clinical settings when used in combination with cytotoxic treatments, such as chemotherapy and/or radiation. We thus discuss the development and application of two of the most notable therapeutic mAbs, cetuximab, and panitumumab, currently utilized in various EGFR-related epithelial cancers.
Insights
Epidermal growth factor receptor (EGFR) dysregulation drives cancer. Therapeutic monoclonal antibodies targeting EGFR, like cetuximab and panitumumab, show promise in treating epithelial cancers by inhibiting tumor progression.
Area of Science:
- Oncology
- Molecular Biology
- Cell Signaling
Background:
- Epidermal growth factor receptor (EGFR) is a key transmembrane tyrosine kinase receptor.
- EGFR signaling regulates critical cellular processes including proliferation, differentiation, and survival.
- Dysregulation of EGFR is implicated in numerous human diseases, particularly epithelial-derived cancers.
Purpose of the Study:
- To detail the role of EGFR in epithelial-derived cancers such as lung, colorectal, and squamous cell carcinomas.
- To review the development and application of anti-EGFR anticancer agents.
- To discuss the clinical utility of therapeutic monoclonal antibodies (mAbs) targeting EGFR.
Main Methods:
- Review of scientific literature on EGFR function and cancer biology.
- Analysis of the mechanisms of action for anti-EGFR therapies.
- Discussion of clinical outcomes for EGFR-targeted treatments.
Main Results:
- EGFR is frequently overexpressed or mutated in epithelial tumors, correlating with poor prognosis.
- Targeted anti-EGFR therapies have shown efficacy in diminishing tumor progression and metastasis.
- Monoclonal antibodies like cetuximab and panitumumab are effective, especially in combination with chemotherapy or radiation.
Conclusions:
- EGFR plays a critical role in the pathogenesis of various epithelial cancers.
- Therapeutic antibodies targeting EGFR represent a significant advancement in cancer treatment.
- Combination therapies involving anti-EGFR mAbs offer improved outcomes for patients with EGFR-related epithelial cancers.
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