'Missing Link' In Immune Response To Disease: Sheer Mechanical Force

How do T cells shift so swiftly from being both jury and executioner when it comes to disease? Researchers report using an array of techniques -- including "optical tweezers" that exploit laser light to press molecules against surface structures found on T cells -- to find out what operates the switch that changes T cells from disease hunter to attacker. Their answer: sheer mechanical force.

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