IL-27 induces a cytotoxic state in CD4+ T cells distinct from the Th1 lineage
CD4+ cytotoxic T lymphocytes (CD4-CTLs) are understudied immune mediators with ambiguous origins. Despite expressing RUNX3, granzyme B (GZMB), and perforin (PRF1), CD4-CTLs are frequently classified as Th1 extensions due to shared interferon-{gamma} (IFN{gamma}) and T-BET expression. Here, we identify interleukin-27 (IL-27) as a independent inducer of a distinct CD4-CTL program. Proteomics…
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