| First Author | Khairnar V | Year | 2018 |
| Journal | Nat Commun | Volume | 9 |
| Issue | 1 | Pages | 2561 |
| PubMed ID | 29967450 | Mgi Jnum | J:266497 |
| Mgi Id | MGI:6209292 | Doi | 10.1038/s41467-018-04832-2 |
| Citation | Khairnar V, et al. (2018) CEACAM1 promotes CD8(+) T cell responses and improves control of a chronic viral infection. Nat Commun 9(1):2561 |
| abstractText | Dysfunction of CD8(+) T cells can lead to the development of chronic viral infection. Identifying mechanisms responsible for such T cell dysfunction is therefore of great importance to understand how to prevent persistent viral infection. Here we show using lymphocytic choriomeningitis virus (LCMV) infection that carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) is fundamental for recruiting lymphocyte-specific protein kinase (Lck) into the T cell receptor complex to form an efficient immunological synapse. CEACAM1 is essential for activation of CD8(+) T cells, and the absence of CEACAM1 on virus-specific CD8(+) T cells limits the antiviral CD8(+) T cell response. Treatment with anti-CEACAM1 antibody stabilizes Lck in the immunological synapse, prevents CD8(+) T cell exhaustion, and improves control of virus infection in vivo. Treatment of human virus-specific CD8(+) T cells with anti-CEACAM1 antibody similarly enhances their proliferation. We conclude that CEACAM1 is an important regulator of virus-specific CD8(+) T cell functions in mice and humans and represents a promising therapeutic target for modulating CD8(+) T cells. |
