Zhao et al. show that, in patients with coronary artery disease, CD4+ T cells present a blunted response to SARS-CoV-2 and Epstein–Barr viral antigens, due to the overexpression of the immune checkpoint CD155 in macrophages, primed by the exposure to low-density lipoprotein and its oxidized form. The experiments show that CD155 overexpression is due to stabilizing post-translational modifications mediated by the mRNA methylase MTTL3.
- Tuantuan V. Zhao
- Zhaolan Hu
- Cornelia M. Weyand