Neutrophils are the superheroes of the body’s immune system. Normally mild-mannered, they travel through the bloodstream until they reach an emergency situation, such as a cut or infection, where they switch into battle-mode to engulf and destroy foreign invaders.
/…/ A receptor called TRPM2 acts as an ROS sensor or gauge inside the neutrophil. When ROS levels are low, the neutrophil is on the move, looking for infections to fight. As the neutrophil nears a wound site and begins to encounter foreign particles or bacteria, it engulfs them and generates a killing burst of ROS to destroy the captured enemy. TRPM2 senses these consistent, high levels of ROS inside the cell and puts the neutrophil in park, so the cell stays in place to continue killing invading microbes.
read the full article.. medicalxpress.com/news/2016-09-reactive-oxygen-species-immune-cells.html
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