Our results argue against the controversial TH1/TH2 or TH17/Treg paradigms. In contrast, they suggest that a subpopulation of TH17 cells sharing a TH1 signature may be specifically involved in intestinal inflammation in CD and UC. These findings provide a better understanding of IBD pathogenesis and may help explain the efficacy of anti-IL-12p40/IL-23 and failure of anti-IL-17A therapies despite the enrichment of TH17 cells.
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