A protein we thought only protected eggs and sperm is actually a secret 'master healer' for your gut.
March 20, 2026
Original Paper
Non-gonadal PIWI protein, Aubergine, regulates regenerative stem cell proliferation and tumourigenesis in the Drosophila adult intestine.
bioRxiv · 2024.11.04.621896
The Takeaway
PIWI proteins were thought to be specialized guardians found only in reproductive cells. This research reveals they are actually repurposed in the gut to boost protein production and repair tissue damage, even playing a role in human intestinal tumors.
From the abstract
The PIWI-interacting RNA (piRNA) biosynthesis pathway is best studied for its role suppressing Drosophila germline transposable elements. Piwi, the founding member of the pathway, is involved in adult intestinal stem cell (ISC) homeostasis. Whether a broader role of the PIWI pathway exists in the intestine, remains unknown. Here, we characterise a role of the PIWI family protein Aubergine (Aub) in ISCs. While dispensable for basal ISC self-renewal, upregulation of Aub by damage-induced reactive