Related Experiment Video
Updated: Jun 8, 2026
Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
Published on: March 17, 2016
Analyzing the regulation of metabolic pathways in human breast cancer
Gunnar Schramm1, Eva-Maria Surmann, Stefan Wiesberg
1Department of Bioinformatics and Functional Genomics, Institute of Pharmacy and Molecular Biotechnology, and Bioquant, University of Heidelberg, INF 267, 69120 Heidelberg, Germany.
Background:
Tumor therapy mainly attacks the metabolism to interfere the tumor's anabolism and signaling of proliferative second messengers. However, the metabolic demands of different cancers are very heterogeneous and depend on their origin of tissue, age, gender and other clinical parameters. We investigated tumor specific regulation in the metabolism of breast cancer.
Methods:
For this, we mapped gene expression data from microarrays onto the corresponding enzymes and their metabolic reaction network. We used Haar Wavelet transforms on optimally arranged grid representations of metabolic pathways as a pattern recognition method to detect orchestrated regulation of neighboring enzymes in the network. Significant combined expression patterns were used to select metabolic pathways showing shifted regulation of the aggressive tumors.
Results:
Besides up-regulation for energy production and nucleotide anabolism, we found an interesting cellular switch in the interplay of biosynthesis of steroids and bile acids. The biosynthesis of steroids was up-regulated for estrogen synthesis which is needed for proliferative signaling in breast cancer. In turn, the decomposition of steroid precursors was blocked by down-regulation of the bile acid pathway.
Conclusion:
We applied an intelligent pattern recognition method for analyzing the regulation of metabolism and elucidated substantial regulation of human breast cancer at the interplay of cholesterol biosynthesis and bile acid metabolism pointing to specific breast cancer treatment.
Insights
Breast cancer metabolism is heterogeneous. This study reveals a specific metabolic switch involving steroid and bile acid pathways, offering new therapeutic targets for aggressive breast cancer.
Area of Science:
- Metabolic regulation in oncology
- Biochemical pathway analysis
- Genomics and transcriptomics
Background:
- Cancer therapies often target tumor metabolism, but metabolic needs vary significantly across cancer types.
- Tumor-specific metabolic adaptations are influenced by clinical parameters like tissue origin, age, and gender.
- Investigating breast cancer metabolism reveals unique regulatory patterns.
Purpose of the Study:
- To investigate tumor-specific metabolic regulation in breast cancer.
- To identify key metabolic pathways involved in breast cancer progression.
- To explore potential therapeutic targets based on metabolic alterations.
Main Methods:
- Gene expression data from microarrays were mapped onto metabolic reaction networks.
- Haar Wavelet transforms were employed for pattern recognition of enzyme regulation.
- Analysis focused on detecting coordinated regulation of neighboring enzymes to identify pathway shifts.
Main Results:
- Up-regulation of energy production and nucleotide biosynthesis pathways observed.
- A significant switch identified between steroid biosynthesis and bile acid metabolism.
- Steroid biosynthesis, particularly for estrogen, was upregulated, while bile acid decomposition was downregulated.
Conclusions:
- An intelligent pattern recognition method elucidated significant metabolic regulation in breast cancer.
- The interplay between cholesterol biosynthesis and bile acid metabolism is crucial in breast cancer.
- Findings suggest specific therapeutic strategies targeting these metabolic pathways for breast cancer treatment.
Related Concept Videos
03:03mTOR Signaling and Cancer Progression
The mTOR pathway or the...
01:19Regulation of Metabolism