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0This research article identifies Group 2 innate lymphoid cells (ILC2s) as essential architects of the pancreatic fibroblast landscape, maintaining organ health and responding to injury. The study reveals that ILC2s reside in a specific interstitial niche where they communicate with Pi16+Dpp4+Ly6c+ fibroblasts, a unique subset with progenitor capabilities. When activated by the alarmin IL-33, ILC2s release IL-13 to stimulate the proliferation of these precursors, which subsequently differentiate into mature fibroblasts to repair tissue. The researchers also discovered that this immune-stromal axis expands during the early stages of pancreatic cancer, influencing the development of cancer-associated fibroblasts. Furthermore, the article describes how tissue-resident macrophages provide a necessary balance by regulating fibroblast numbers through phagocytosis. Ultimately, the findings establish ILC2s as local choreographers that set inflammatory thresholds and govern fibroblast topography in both healthy and pathological states.
References:
Yip T, Stockis J, Simpson C, et al. ILC2s regulate a fibroblast progenitor niche in the pancreas[J]. Science, 2026, 393(6806): eaea5113.
