A DNA Nanodevice Simultaneously Activating the EGFR and Integrin for Enhancing Cytoskeletal Activity and Cancer Cell...

Area of Science:

• Biochemistry
• Cell Biology
• Nanotechnology

Background:

• Cell-surface receptors, including EGFR and integrin, are crucial for signal transduction and cellular processes like attachment, motility, and metastasis.
• Interactions between EGFR and integrin (α6β4) can generate significant mechanical forces, influencing cell behavior.

Purpose of the Study:

• To design and utilize a DNA nanodevice (DNA-ND) for simultaneous targeting of EGFR and integrin receptors.
• To quantify piconewton forces generated by co-activated EGFR-integrin receptors.
• To investigate the impact of receptor coactivation on cellular signaling and processes.

Main Methods:

• Development of a DNA nanodevice with hairpin structures to sense unfolding forces.
• Simultaneous targeting of EGFR and integrin receptors on caveolae.
• Monitoring changes in fluorescence and plasmonic signals to detect pN forces.
• Visualization of receptor cointernalization and lysosomal degradation.

Main Results:

• Simultaneous EGFR-integrin activation leads to enhanced signal transduction and cell contraction.
• Coactivation initiates biochemical pathways affecting cell division, endocytosis/exocytosis, proliferation, and apoptosis.
• The DNA-ND successfully visualizes cointernalization and degradation of targeted receptors.

Conclusions:

• The DNA nanodevice provides a novel method for sensing mechanical forces associated with receptor coactivation.
• This approach offers new insights into cell signaling, proliferation, and apoptosis.
• The technology presents a novel platform for bioimaging and mechano-pharmacology research.