Researchers Discover Gut Cells Measure Hunger Through Internal Fluidity
A team of researchers at the RIKEN Center for Biosystems Dynamics Research in Japan, led by Sa Kan Yoo, has uncovered a novel mechanism by which gut cells in fruit flies measure hunger. The study, published in the Proceedings of the National Academy of Sciences, reveals that the turnover of gut cells is influenced by the fluidity of their internal environment rather than specific nutrients. This discovery challenges traditional views that nutrient sensing is primarily driven by specific biological signaling pathways. The researchers found that when nutrient levels are low, the gut cells become more fluid and watery, leading to a process they termed 'erebosis,' a new type of cell death. This process was observed to increase with a low-yeast, high-sugar diet, and was not suppressed by altering amino acid concentrations, suggesting that the effect is not due to specific amino acids but rather the overall nutrient quantity. 
