PT  - JOURNAL ARTICLE
AU  - Long, Junke
AU  - Yang, Chenxuan
AU  - Zheng, Yawen
AU  - Loughran, Patricia
AU  - Guang, Fu
AU  - Li, Yiming
AU  - Liao, Hong
AU  - Scott, Melanie J.
AU  - Tang, Daolin
AU  - Billiar, Timothy R.
AU  - Deng, Meihong
TI  - Notch signaling protects CD4 T cells from STING-mediated apoptosis during acute systemic inflammation
AID  - 10.1126/sciadv.abc5447
DP  - 2020 Sep 01
TA  - Science Advances
PG  - eabc5447
VI  - 6
IP  - 39
4099  - http://advances.sciencemag.org/content/6/39/eabc5447.short
4100  - http://advances.sciencemag.org/content/6/39/eabc5447.full
SO  - Sci Adv2020 Sep 01; 6
AB  - Dysregulation of T cell apoptosis contributes to the pathogenesis of acute systemic inflammation–induced immunosuppression, as seen in sepsis and trauma. However, the regulatory mechanisms of T cell apoptosis are unclear. Activation of stimulator of interferon genes (STING) has been shown to induce T cell apoptosis. Notch was previously identified as the top negative regulator of STING in macrophages through a kinase inhibitor library screening. However, how Notch signaling regulates STING activation in T cells is unknown. Here, using a γ-secretase inhibitor to block Notch signaling, we found that Notch protected CD4 T cells from STING-mediated apoptosis during endotoxemia. Mechanistically, Notch intracellular domain (NICD) interacted with STING at the cyclic dinucleotide (CDN) binding domain and competed with CDN to inhibit STING activation. In conclusion, our data reveal a previously unidentified role of Notch in negative regulation of STING-mediated apoptosis in CD4 T cells.