Microbial adhesion promotes Piezo1 activation to initiate innate immunity.

Microbial adhesion activates Piezo1 to initiate innate immunity, triggering neutrophil recruitment before pattern recognition receptor engagement.

• Why it matters: Understanding the early steps of immune activation is crucial, as microbial adhesion acts as a previously unrecognized danger signal that primes the immune response, filling a key knowledge gap.
• What they did: The study used a skin infection model with bacteria and fungi, demonstrating that microbial adhesion engages Piezo1 on myeloid cells, leading to leukotriene B4 production and neutrophil infiltration in a PRR-independent manner.
• The result: This discovery reveals mechanotransduction via Piezo1 as an initial immune activation step, offering new insights into how innate immunity is rapidly triggered during infection.