HER2 Antibody - ERBB2 Tumor Marker for Cancer Research

HER2 (ERBB2) Antibodies for Tumor Marker Research

Receptor tyrosine-protein kinase erbB-2 (ERBB2), commonly known as HER2 or HER2/neu, is a transmembrane receptor tyrosine kinase belonging to the epidermal growth factor receptor family. HER2 plays a central role in regulating cell proliferation, survival, and differentiation through activation of signaling pathways such as PI3K-AKT and MAPK. HER2 antibody reagents are widely used to detect ERBB2 expression in epithelial tissues and tumors, where dysregulation and overexpression are associated with aggressive disease phenotypes.

In normal tissues, HER2 expression is typically low and restricted to select epithelial compartments, whereas tumor cells may exhibit increased expression and distinct membranous staining patterns. This differential expression makes HER2 a critical tumor marker in cancer research, particularly in studies of breast, gastric, and other epithelial malignancies.

Applications of HER2 Antibodies

HER2 antibodies are used across multiple research applications to evaluate ERBB2 expression and function. In immunohistochemistry, HER2 antibodies enable visualization of receptor localization in formalin-fixed, paraffin-embedded tissues, where membranous staining patterns provide insight into receptor overexpression and tumor cell distribution.

Beyond tissue-based analysis, HER2 antibodies are also used in immunodetection assays such as western blot and ELISA to assess protein expression levels and signaling activity. These complementary approaches support both qualitative and quantitative analysis of HER2 across different experimental systems.

HER2 Expression in Normal and Cancer Tissues

HER2 expression follows distinct patterns depending on tissue context. In normal epithelial tissues, expression is generally low, with limited membranous localization. In contrast, tumor tissues may exhibit strong and circumferential membranous staining, reflecting receptor overexpression and altered signaling activity.

HER2 overexpression is most commonly associated with subsets of breast and gastric carcinomas, where it contributes to tumor progression and cellular proliferation. The clear contrast between HER2-positive tumor cells and surrounding non-expressing tissues enhances interpretability in tissue-based assays and supports its use in tumor classification and biomarker studies.

Tissue Microarray (TMA) Analysis of HER2 Antibodies

Tissue microarray (TMA) analysis enables large-scale evaluation of HER2 expression across diverse normal and cancer tissues under standardized experimental conditions. HER2 antibodies applied to TMA panels allow direct comparison of staining intensity and distribution across hundreds of tissue cores.

In TMA-based studies, HER2-positive tumors demonstrate strong membranous staining, while normal tissues typically show minimal signal, reinforcing the specificity of HER2 as a tumor-associated marker. This high-throughput approach supports biomarker validation, tumor profiling, and comparative analysis of HER2 expression across different cancer types.

Explore HER2 Antibody Products

A range of HER2 antibody reagents are available to support different research applications, including immunohistochemistry and other immunodetection assays. These antibodies enable reliable detection of ERBB2 expression across a variety of sample types and experimental formats.

A selection of HER2 antibody products is shown below to support a range of research applications.