In response to dry soil, a sensor in a garden triggers a sprinkler to deliver a shower of rain. Disaster strikes, though, if the sensor gets stuck in the “on” position. The shower turns into a stalled storm that floods the garden.
A similar problem can occur in the body. Immune cells contain danger sensors. They respond to danger with a sprinkling of signals that trigger healing inflammation. But if the danger sensor gets stuck on, the result is chronic inflammation that can cause more damage than good.
Novartis researchers aim to break this pattern by silencing part of the …