For example, Wang et al. found that knockout of SHP2 using CRISPR/Cas9 gene editing inhibited SHP2 activity and enhanced tumor-intrinsic IFNγ signaling, resulting in increased chemoattractive cytokine release and cytotoxic T cell recruitment, as well as increased tumor cell surface Increased expression of MHC class I and PD-L1. This evidence concerns the gene PTPN11 and neoplasm.