The human epidermal growth factor receptor 2 (HER2)

Laura J Tafe1, Gregory J Tsongalis

  • 1Department of Pathology, Dartmouth Medical School, Dartmouth Hitchcock Medical Center, Lebanon, NH, USA. Laura.J.Tafe@hitchcock.org

Insights

The human epidermal growth factor receptor 2 (HER2) is a key target in cancer therapy. Novel treatments, including monoclonal antibodies and small molecule drugs, target HER2, advancing personalized medicine.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • The "war on cancer" initiative spurred the development of targeted cancer therapies.
  • The human epidermal growth factor receptor 2 (HER2) gene has emerged as a significant target for novel therapeutics.
  • HER2-targeted therapies represent a paradigm shift in cancer treatment strategies.

Purpose of the Study:

  • To review the biological functions of HER2.
  • To discuss the clinical applications of HER2 as a biomarker.
  • To explore HER2 as a therapeutic target in cancer treatment.

Main Methods:

  • Review of scientific literature on HER2 biology and clinical applications.
  • Analysis of HER2's role in personalized medicine and companion diagnostics.
  • Examination of therapeutic strategies targeting HER2.

Main Results:

  • HER2 is a crucial biomarker for disease identification and prognosis.
  • Targeting HER2 involves both extracellular monoclonal antibody therapy and intracellular small molecule drugs.
  • HER2-targeted therapies exemplify early applications of personalized medicine.

Conclusions:

  • HER2 is a validated therapeutic target with significant clinical impact.
  • The development of HER2-targeted therapies has advanced personalized cancer care.
  • Understanding HER2 biology is critical for developing future cancer treatments.

Related Concept Videos

Mitogens and the Cell Cycle02:38

Mitogens and the Cell Cycle

Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
Metastasis02:30

Metastasis

Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Receptor Tyrosine Kinases01:26

Receptor Tyrosine Kinases

Receptor tyrosine kinases or RTKs are membrane-bound receptors that phosphorylate specific tyrosine on protein substrates. RTKs regulate cellular growth, differentiation, survival, and migration. They contain an extracellular ligand binding domain, a transmembrane domain, and a cytosolic tail with intrinsic kinase activity. Several extracellular signaling molecules activate RTKs in one or more ways and relay the signal downstream. Ligands such as platelet-derived growth factor (PDGF) or...
Enzyme-linked Receptors01:00

Enzyme-linked Receptors

Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...