Lung Cancer Induces NK Cell Contractility and Cytotoxicity Through Transcription Factor Nuclear Localization

Area of Science:

• Immunology
• Cell Biology
• Cancer Research

Background:

• Actomyosin contractility is crucial for mechanotransduction in adherent cells.
• Its role in suspension cells, like natural killer (NK) cells, during cancer surveillance remains unclear.
• Understanding NK cell contractility is vital for cancer immunotherapy.

Purpose of the Study:

• To investigate how actomyosin-mediated contractility regulates NK cell function during lung cancer surveillance.
• To identify the mechanisms linking NK cell contractility to enhanced cytotoxicity.
• To explore the role of the transcription factor Eomes in this process.

Main Methods:

• Co-culture models of NK cells and lung cancer cells.
• Biophysical and biochemical analyses to assess cellular contractility and protein localization.
• Investigation of NK cell response to TGFβ in the tumor microenvironment.

Main Results:

• NK cell contractility is enhanced during lung cancer cell surveillance, leading to nuclear flattening and Eomes nuclear entry.
• This enhanced contractility is linked to increased NK cell cytotoxicity.
• NK cells sustain contractility via myosin light chain phosphorylation in response to TGFβ, promoting Eomes localization.

Conclusions:

• Lung cancer cells induce NK cell contractility as an early activation mechanism.
• Eomes acts as a mechano-responsive protein, enhancing NK cell cytotoxicity.
• Modulating NK cell contractility presents a potential strategy to improve adoptive cancer immunotherapy.