Mechanically Optimize T Cells Activation by Spiky Nanomotors

Area of Science:

• Biotechnology
• Immunology
• Nanotechnology

Background:

• T cell activation is crucial for immune responses, influenced by T cell receptor (TCR)-MHC interactions and mechanical forces.
• Mechanosensitive ion channels in T cells respond to physical stimuli, playing a role in immune modulation.
• Synthetic micro/nanomotors offer a novel platform for converting energy into physical force, enabling new avenues for T cell regulation.

Purpose of the Study:

• To investigate the potential of synthetic nanomotors to modulate T cell activation through physical force generation.
• To explore the use of Pd/Au nanomotors in a biological environment for T cell stimulation.
• To demonstrate a new approach for cell-based cancer immunotherapy leveraging mechanical signaling.

Main Methods:

• Fabrication of spiky palladium-gold (Pd/Au) nanomotors.
• Observation of nanomotor locomotion in a cellular biological environment using hydrogen peroxide fuel.
• Assessment of T cell activation triggered by physical forces from nanomotor activity.

Main Results:

• Pd/Au nanomotors demonstrated continuous locomotion in the cellular environment.
• The physical forces generated by nanomotors were sensed by T cells' mechanosensitive ion channels.
• This mechanical stimulation led to calcium (Ca2+) influx and subsequent T cell activation.

Conclusions:

• Mechanical signals generated in the bio-microenvironment by nanomotors can potentiate T cell activation.
• This study presents a novel method for T cell stimulation using engineered nanomotors.
• The findings suggest a promising potential for nanomotor-based mechanical stimulation in cell-based cancer immunotherapy.