February 27, 2019

Treat the Player, Treat the Game: Targeting Cancer’s Evolutionary Strategies

An eco-evolutionary perspective

19-LRI-182-ScottDiagramBoard-650×450

Despite rapid advances in targeted therapies for cancer, tumors commonly develop resistance to treatment. When resistance emerges, tumor cells continue to grow unchecked, despite all attempts to slow the progression of the cancer. While mutations in cancer cells significantly affect drug sensitivity, it is increasingly recognized that ecological interactions between cells can also play a role.

Advertisement

Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy

Jacob Scott, MD, DPhil, associate staff in the Department of Translational Hematology and Oncology Research, is interested in learning how cancer cells develop and maintain drug resistance from an eco-evolutionary perspective. He studies the evolutionary strategies that cells employ to survive even in the harshest of conditions. One area of focus of his laboratory is to examine the dynamics of sensitive versus resistant cancer cells and how they affect one another’s growth under the selective pressure of anticancer therapies.

“Rather than searching for a ‘silver bullet’ to wipe out all resistant cells, which is unlikely, we are focused on preventing the resistant cells from taking over — from ‘winning’ every time,” Dr. Scott explains. “If we can achieve this goal, we can effectively make cancer a chronic condition.”

Up until this point, it had been assumed that drug-resistant cells have a cell autonomous survival advantage over sensitive cells in the presence of therapy. The eco-evolutionary perspective, however, recognizes that cancer cell growth is partially non-cell-autonomous — it depends on both the cell’s own mechanisms and other cells and factors in the tumor microenvironment. Thus, different cell types can be represented as “strategies” for survival and proliferation, and the effects of their interactions can be summarized as a “game.”

Advertisement

In a paper recently published in Nature Ecology and Evolution, Dr. Scott and his collaborators develop a first-in-class “game assay” which they used to directly quantify and describe the eco-evolutionary interactions between sensitive and resistant tumor cells in an experimental model of non-small cell lung cancer cells sensitive to targeted therapy. This discovery represents a turning point in the relatively young but growing field of evolutionary therapy, which seeks to harness the dynamics underlying the evolutionary games that cancer cells play. A solid understanding of these games will help fill in gaps in understanding about how to interrupt the natural trajectory of cancer as it develops drug resistance, with the hope of eliminating resistance as a winning strategy.

“Our motto is ‘treat the game, not the player’,” says Artem Kaznatcheev, first author on the paper and graduate student in Dr. Scott’s lab. When cancer cells are targeted directly, evolution usually works against the patient. It selects for the emergence of resistant cells which enables the tumor to escape therapy and leads to relapse. To mitigate this risk, Dr. Scott and his team are researching less direct approaches. “We are searching for ways to transform the interactions between cells — i.e., the games they play — so that we can coopt their evolution to better help the patient.”

Using an ALK mutant non-small cell lung cancer model that quickly develops resistance to targeted therapy in vitro, Dr. Scott and his team designed an assay to measure and compare growth rates of cells sensitive and resistant to the drug alectinib when cultured in different scenarios. The team found a switch was flipped in the game governing cancer cell dynamics when drug and tumor-associated fibroblasts were present. In one game (called the “Deadlock” game), resistant cells always win and thus expand towards making up the entire tumor. In another situation (called the “Leader” game), both cell types compete with each other and thus coexist.

Advertisement

In other words, Dr. Scott and his colleagues effectively established that by applying drug or eliminating fibroblasts, it is in fact possible to “treat the game.” More studies are needed to explore this as a potential intervention. Areas of future study also include applying the new assays in other types of cancer to expand the growing catalog of games that Dr. Scott and his team study.

This study was partially funded by the National Cancer Institute’s K12 mentored training grant through the Case Comprehensive Cancer Center 2K12CA076917-21.

Related Articles

19-DDI-6059-IBD-CQD
October 12, 2023
Researchers Identify Promising Compound for IBD Treatment

Cleveland Clinic and Johns Hopkins collaboration could help meet need for new therapies

Zika-mosquito-650×450
October 4, 2023
Discovering the Clever Way that Flaviviruses Boost Their Own Replication

Cleveland Clinic researchers’ finding paves the way for new antiviral approaches

23-NEU-4202909-CQD-Hero-650×450
September 20, 2023
Pairing Deep Learning With Wide-Field Microscopy to Refine Study of Brain Tissue

Multicenter collaboration aims to facilitate tracking of neurological activity deep within tissue

23-CCC-3906442 MCEMP1 asthma research 650×450
May 25, 2023
Research Links Immune Cell Receptors to Asthma, Inflammatory Lung Disease

Findings illuminate MCEMP1 protein’s role in severe inflammation

news_1672953098
February 7, 2023
Research Into How Cells ‘Self-Destruct’ Maps Out Body’s Defenses Against Viruses

Anti-viral immunity identified a novel mechanism in necroptosis

LRI_2875909_04-21-22_Ted Ross
October 5, 2022
Where We’re Headed with Vaccine Research: A Conversation with Ted Ross, PhD

Cleveland Clinic’s new Global Director of Vaccine Development outlines plans, priorities

650×450-COVID-research
July 8, 2022
Research Aims to Prevent Future Pandemics

Collaborative involving Cleveland Clinic investigators focuses on antiviral drug development

MED_Zoldsey_2677360
May 11, 2022
New Research Collaborative Aims to Close Minority Health Disparities

Cleveland Clinic Latino Epidemiology Cohort focuses on underrepresented communities in biomedical research

Ad