Evolutionary Double-Bind Treatment Using Radiation Therapy and Natural Killer Cell-Based Immunotherapy in Prostate...

Area of Science:

• Oncology
• Immunology
• Evolutionary Biology

Background:

• Cancer cells evolve resistance to treatments, leading to disease progression.
• Evolution-informed therapies exploit resistance mechanisms to improve treatment efficacy.
• The evolutionary double-bind strategy uses sequential therapies to target adaptive resistance.

Purpose of the Study:

• To present the first quantifiable example of an evolutionary double-bind in cancer treatment.
• To investigate the combination of radiation therapy (RT) and natural killer (NK) cells as an evolutionary double-bind.
• To mathematically model and experimentally validate this double-bind strategy.

Main Methods:

• In vitro studies using prostate cancer cell lines to assess NK cell ligand expression after RT.
• Evolution-based mathematical modeling using a Lotka-Volterra competition model.
• In vitro competition experiments with isogenic radiation-resistant cell lines.

Main Results:

• RT followed by NK cells demonstrated selective targeting of radiation-resistant cells.
• This combination therapy increased sensitivity to NK cell-mediated killing.
• Mathematical models predicted and experiments confirmed optimal tumor control with sequential RT and NK cell therapy.

Conclusions:

• Radiation therapy and NK cell immunotherapy create a quantifiable evolutionary double-bind.
• This approach combats treatment resistance and informs personalized cancer regimens.
• The study establishes a novel experimental-mathematical framework for quantifying evolutionary double-binds.