1564-Intestinal Muscle Plasticity and Regulation of Gut Size

Paper Talk · Sep 10, 2026 · 21m

This research identifies intestinal muscle as a primary regulator of organ size and reproductive adaptation in both Drosophila and mice. While previous models focused on epithelial stem cells, these findings prove that visceral musculature actively remodels its own sarcomere architecture in response to sex-intrinsic determinants and hormonal signals. In females, mating triggers sarcomere elongation and myofibril thickening, changes that physically expand the gut and slow peristalsis to maximize nutrient absorption. Genetic manipulation of the Sxl-Tra-Dsx pathway reveals that these…