Scientists discover why your appetite suddenly disappears when you’re sick
Why it matters: Understanding this gut-brain link could revolutionize treatments for appetite loss and various digestive disorders.
- UCSF researchers identified a biological pathway linking the gut's immune response to the brain during parasitic infections, explaining appetite loss.
- Tuft cells in the gut act as detectors, sensing parasites and initiating immune defenses by releasing signaling molecules like acetylcholine.
- Enterochromaffin (EC) cells, known for producing sensations like nausea and discomfort, are stimulated by these signals to communicate with the brain, actively reducing the desire to eat.
- The study, published in Nature, suggests this discovery could also shed light on other digestive issues, including food intolerances and irritable bowel syndrome.
Scientists at the University of California - San Francisco have uncovered a sophisticated gut-brain pathway that explains the sudden loss of appetite during illness, particularly parasitic infections. Specialized gut cells detect parasites and release signals, including acetylcholine, which then activate other cells to communicate with the brain, actively suppressing the desire to eat.
