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3D Visualization of the Dynamic Bidirectional Talk Between ER/PR and Her2 Pathways.
Jiahong Lyv1, Guohua Yu2, Yunyun Zhang1
1Yantai Quanticision Diagnostics, Inc, Yantai, P. R. China.
Technology in Cancer Research & Treatment
|December 13, 2021
Summary
Archived breast cancer tissues reveal a "seesaw" relationship between estrogen receptor (ER)/progesterone receptor (PR) and human epidermal growth factor receptor 2 (Her2) pathways. This finding supports bidirectional communication and suggests new therapeutic strategies.
Area of Science:
- Oncology
- Molecular Biology
- Biomedical Research
Background:
- Archived formalin-fixed paraffin-embedded (FFPE) human tumor tissues are valuable for cancer research but limited by protein analysis techniques.
- Quantitative Dot Blot (QDB) is a novel, high-throughput immunoblot method developed to overcome limitations in analyzing FFPE tissues.
- This study investigates the relationship between estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (Her2) pathways in breast cancer.
Purpose of the Study:
- To explore the relationship between ER/PR and Her2 signaling pathways in breast cancer tumorigenesis using FFPE tissues.
- To validate the quantitative dot blot (QDB) method for absolute and quantitative protein analysis in archived cancer specimens.
- To visualize and analyze the distribution of ER, PR, and Her2 protein expression levels in a 3D space.
Main Methods:
- A descriptive, observational, retrospective study involving 852 FFPE breast cancer tissues.
- Absolute and quantitative measurement of ER, PR, Her2, and Ki67 protein levels using the QDB method.
- 3D scatterplot visualization of ER, PR, and Her2 expression levels to analyze specimen distribution.
Main Results:
- A 'seesaw' relationship was observed between ER/PR and Her2 pathways, visualized in the 3D ER-PR-Her2 space.
- Specimens showed distinct distribution patterns based on ER/PR and Her2 expression levels, with inverse correlations noted.
- Ki67 levels were significantly reduced in specimens with high ER-PR expression, indicating an inverse relationship with proliferation.
Conclusions:
- The observed specimen distribution supports bidirectional communication between ER/PR and Her2 pathways in breast cancer.
- Findings suggest potential for exploring alternative clinical interventions targeting these pathways for breast cancer treatment.
- The QDB method is demonstrated as an effective tool for analyzing protein expression in archived FFPE cancer specimens.
