Germline biallelic mutation affecting the transcription factor Helios causes pleiotropic defects of immunity
Tala Shahin, Hye Sun Kuehn, Mohamed R. Shoeb, Lisa Gawriyski, Sarah Giuliani, Peter Repiščák, Birgit Hoeger, Özlem Yüce Petronczki, Sevgi Köstel Bal, Samaneh Zoghi, Jasmin Dmytrus, Davide Seruggia, Irinka Castanon, Nima Rezaei, Markku Varjosalo, Florian Halbritter, Sergio D. Rosenzweig, Kaan Boztuǧ
Abstract
T cells exhibited a pronounced defect in proliferation with delayed expression of surface checkpoint inhibitors, suggesting an impaired onset of the T cell activation program. Collectively, we identified a previously uncharacterized, germline-encoded inborn error of immunity and uncovered a cell-specific defect in Helios-dependent epigenetic regulation. Binding of Helios with specific partners mediates this regulation, which is ultimately necessary for the transcriptional programs that enable T cell homeostasis in health and disease.