The abstract is read at the publisher; the summary is JClub's.
IFN-γ–driven MHC class II expression on intestinal epithelial cells within the first 3 days after allogeneic hematopoietic stem cell transplantation promotes lethal gut GVHD in mice.
- Why it matters: The cues that activate CD4 T cells at the epithelial interface to drive lethal gut GVHD are unclear, limiting targeted prevention.
- What they did: In mice, intestinal epithelial MHCII (not MHC I) induced early IFN-γ–dependent MHCII upregulation, expanding perforin/granzyme B–expressing cytolytic TH1 cells while restraining TH17 differentiation locally within the ileum.
- The result: IFN-γ–induced MHCII on IECs is linked to preferential, progressive depletion of intestinal stem cells by cytolytic TH1 cells, supporting an IFN-γ–MHCII feed-forward axis that initiates MHCII-dependent gut disease.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.