Cancer treatment is simple, right?
Kill as many cancer cells as possible, as quickly as possible.
In some cases, that may be exactly the wrong approach.
In this episode, Dr. Dawn Lemanne and Dr. Deborah Gordon explore a surprising idea emerging from evolutionary biology, ecology, and mathematical oncology: in some metastatic cancers, aggressive treatment may unintentionally accelerate the growth of treatment-resistant cancer cells.
Using examples ranging from DDT-resistant boll weevils to metastatic prostate cancer, they discuss:
• Why cancer treatments stop working in advanced cancers
• How cancer cells evolve resistance
• How treatment-sensitive cancer cells actually help control more dangerous treatment-resistant cancer cells
• The concept of "competitive release" and how treatment can unintentionally remove the competition that restrains resistant cancer cells
• How new blood tests called circulating tumor DNA (ctDNA) allow physicians to monitor cancer in real time
• The emerging field of adaptive cancer therapy, in which treatment intensity is adjusted in response to the cancer's evolutionary behavior
• The research suggesting that overtreatment can sometimes shorten, rather than prolong, cancer control
Along the way, they explore groundbreaking work mathematical oncologists and cancer evolution researchers, and discuss a radically different way of thinking about advanced cancer—not simply as an enemy to destroy, but as an evolving ecosystem whose behavior may be influenced and, in some cases, steered.
This conversation applies to advanced metastatic cancers that cannot be cured with current treatments. It does not challenge the importance of aggressive treatment for cancers that remain potentially curable.
The question explored in this episode is simple:
Can killing more cancer cells sometimes make cancer worse?
Dawn Lemanne, MD
Oregon Integrative Oncology
Leave no stone unturned.
Deborah Gordon, MD
Northwest Wellness and Memory Center
Building Healthy Brains