A protein network fails to preserve gut cell identity in aging flies
Experiments in adult flies traced how machinery associated with stem cells became active again with age, undermining mature gut cells’ specialized identity.
Limit: Cell identity loss was inferred from declining enterocyte gene signatures
Edited by Boris Djordjevic · AgingResearch.News
In the midgut of adult Drosophila flies, researchers studied enterocytes, mature cells that absorb nutrients. They measured gene activity in individual cells, used cell-tracking methods and performed genetic experiments.
In young enterocytes, a protein network continually broke down proteins belonging to machinery associated with stem cells. This kept the machinery suppressed and preserved the cells’ specialized identity. With age, levels of one network component declined, while Rogue, a protein that suppresses the production of other proteins, appeared. Rogue and its partner reactivated the stem cell-related machinery. This led to a decline in gene activity characteristic of mature enterocytes, loosening their specialized identity.
Why it matters
Loss of cell identity is a hallmark of aging associated with multiple age-related diseases. The work addresses how mature cells maintain their specialized roles—and how that control can fail with age.
Caveats
These experiments examined cell identity in the adult fly midgut, not people. They did not establish effects on lifespan or age-related disease.
The paper
Rappaport Family Institute for Research in the Medical Sciences
Genes & Development, Oct 27, 2026, Open access
