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Updated: Dec 12, 2025

Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
Published on: March 17, 2016
A systems biology approach to discovering pathway signaling dysregulation in metastasis
Robert Clarke1,2, Pavel Kraikivski3, Brandon C Jones4
1Department of Oncology, Georgetown University Medical Center, 3970 Reservoir Rd NW, Washington, DC, 20057, USA. clarker@umn.edu.
Abstract:
Total metastatic burden is the primary cause of death for many cancer patients. While the process of metastasis has been studied widely, much remains to be understood. Moreover, few agents have been developed that specifically target the major steps of the metastatic cascade. Many individual genes and pathways have been implicated in metastasis but a holistic view of how these interact and cooperate to regulate and execute the process remains somewhat rudimentary. It is unclear whether all of the signaling features that regulate and execute metastasis are yet fully understood. Novel features of a complex system such as metastasis can often be discovered by taking a systems-based approach. We introduce the concepts of systems modeling and define some of the central challenges facing the application of a multidisciplinary systems-based approach to understanding metastasis and finding actionable targets therein. These challenges include appreciating the unique properties of the high-dimensional omics data often used for modeling, limitations in knowledge of the system (metastasis), tumor heterogeneity and sampling bias, and some of the issues key to understanding critical features of molecular signaling in the context of metastasis. We also provide a brief introduction to integrative modeling that focuses on both the nodes and edges of molecular signaling networks. Finally, we offer some observations on future directions as they relate to developing a systems-based model of the metastatic cascade.
Insights
Systems modeling offers a new approach to understanding cancer metastasis. This method addresses challenges like data complexity and tumor heterogeneity to identify novel therapeutic targets for metastatic disease.
Area of Science:
- Oncology
- Systems Biology
- Computational Biology
Background:
- Metastasis is the primary cause of cancer mortality, yet understanding of its complex mechanisms remains incomplete.
- Few therapeutic agents specifically target the metastatic cascade, highlighting a critical need for novel strategies.
- Current knowledge of gene and pathway interactions in metastasis is rudimentary, necessitating a more holistic view.
Purpose of the Study:
- To introduce systems modeling as a framework for understanding cancer metastasis.
- To define challenges in applying a multidisciplinary, systems-based approach to metastasis research.
- To identify actionable therapeutic targets within the metastatic cascade.
Main Methods:
- Conceptual introduction to systems modeling and its application to complex biological systems.
- Discussion of challenges including high-dimensional omics data, knowledge gaps in metastasis, tumor heterogeneity, and sampling bias.
- Overview of integrative modeling focusing on molecular signaling networks (nodes and edges).
Main Results:
- Identified key challenges in applying systems modeling to metastasis, such as data complexity and tumor heterogeneity.
- Highlighted the importance of a holistic, systems-based approach to unraveling metastasis.
- Provided foundational concepts for developing a systems model of the metastatic cascade.
Conclusions:
- Systems modeling presents a promising avenue for a comprehensive understanding of cancer metastasis.
- Addressing identified challenges is crucial for advancing systems-based approaches in oncology.
- Future research should focus on developing robust systems models to uncover novel therapeutic strategies for metastasis.
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