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Orthotopic Transplantation of Breast Tumors as Preclinical Models for Breast Cancer
Published on: May 18, 2020
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Dynamic altruistic cooperation within breast tumors
Muhammad Sufyan Bin Masroni1, Kee Wah Lee1,2, Victor Kwan Min Lee1,3
1Department of Pathology, Yong Loo Lin School of Medicine, National University of Singapore, Level 3 NUH Main Building, 21 Lower Kent Ridge Road, Singapore, 119077, Singapore.
Molecular Cancer
|December 14, 2023
Summary
Cancer cells exhibit altruism, sacrificing themselves for collective benefit and contributing to chemoresistance. This social behavior, regulated by miR-125b, allows altruistic cells to persist and influences tumor evolution.
Area of Science:
- Oncology
- Evolutionary Biology
- Game Theory
Background:
- Social behaviors like altruism are crucial for organism survival but underexplored in cancer cells, typically viewed as competitive.
- This study investigates altruism in breast cancer cells and its role in chemoresistance.
Purpose of the Study:
- To elucidate the mechanisms of altruism in breast cancer cells.
- To understand how cancer cell altruism contributes to chemoresistance and tumor evolution.
Main Methods:
- MicroRNA profiling of patient-derived circulating tumor cells.
- Co-culture experiments with docetaxel treatment and assessment of ecological parameters.
- In vitro and in vivo functional studies including mass spectrometry, RNA sequencing, and mathematical modeling.
Main Results:
- Altruistic cancer cells secrete IGFBP2 and CCL28, benefiting neighbors under taxane exposure, while undergoing cell cycle arrest.
- miR-125b regulates these opposing processes via NF-κB signaling (IKKβ).
- Altruistic cells regenerate epigenetically and maintain spatial organization through lateral inhibition.
Conclusions:
- Revealed molecular mechanisms of cancer cell altruism, persistence, and spatial spread.
- Demonstrated tumors as dynamic social systems governed by cooperation, impacting drug response.
- Highlighted cancer cells as models for evolutionary ecology and game theory.
