| First Author | Casey SC | Year | 2016 |
| Journal | Science | Volume | 352 |
| Issue | 6282 | Pages | 227-31 |
| PubMed ID | 26966191 | Mgi Jnum | J:231582 |
| Mgi Id | MGI:5771915 | Doi | 10.1126/science.aac9935 |
| Citation | Casey SC, et al. (2016) MYC regulates the antitumor immune response through CD47 and PD-L1. Science 352(6282):227-31 |
| abstractText | The MYC oncogene codes for a transcription factor that is overexpressed in many human cancers. Here we show that MYC regulates the expression of two immune checkpoint proteins on the tumor cell surface: the innate immune regulator CD47 (cluster of differentiation 47) and the adaptive immune checkpoint PD-L1 (programmed death-ligand 1). Suppression of MYC in mouse tumors and human tumor cells caused a reduction in the levels of CD47 and PD-L1 messenger RNA and protein. MYC was found to bind directly to the promoters of the Cd47 and Pd-l1 genes. MYC inactivation in mouse tumors down-regulated CD47 and PD-L1 expression and enhanced the antitumor immune response. In contrast, when MYC was inactivated in tumors with enforced expression of CD47 or PD-L1, the immune response was suppressed, and tumors continued to grow. Thus, MYC appears to initiate and maintain tumorigenesis, in part, through the modulation of immune regulatory molecules. |
