Supplementary Figure 9 The characteristics of NB tumors and immune cells in CD112/CD155 high-ratio and low-ratio groups revealed by bulk RNA sequencing analysis. (A) A total of 3537 DEGs between CD112/CD155 high-ratio and low-ratio groups (grouping according to the ratio median in the violin plot) are identified by RNA sequencing analysis with 38 NB tumor samples and illustrated in volcano plot. (B) The expression of genes related with neuroblastoma in KEGG pathway transcriptional misregulation in cancer is illustrated in heatmap. (C) and (D) The enriched top 20 KEGG pathways in high-ratio or low-ratio tumors are shown in dot plots. (E) and (F) The enriched top 30 GO pathways (top 10 in BP, CC and MF respectively) in high-ratio or low-ratio tumors are shown in dot plots. (G) and (H) The representative GSEA pathways enriched in high-ratio or low-ratio tumors are labeled with NES and p values.
ARTICLE ABSTRACT
The dynamic interplay between tumor cells and γδT cells within the tumor microenvironment significantly influences disease progression and immunotherapy outcome. In this study, we delved into the modulation of γδT-cell activation by tumor cell ligands CD112 and CD155, which interact with the activating receptor DNAM-1 on γδT cells. Spatial and single-cell RNA sequencing, as well as spatial metabolomic analysis, from neuroblastoma revealed that the expression levels and localization of CD112 and CD155 varied across and within tumors, correlating with differentiation status, metabolic pathways, and ultimately disease prognosis and patient survival. Both in vivo tumor xenograft experiments and in vitro coculture experiments demonstrated that a high CD112/CD155 expression ratio in tumors enhanced γδT cell–mediated cytotoxicity, whereas a low ratio fostered tumor resistance. Mechanistically, CD112 sustained DNAM-1–mediated γδT-cell activation, whereas CD155 downregulated DNAM-1 expression via E3 ubiquitin ligase tripartite motif–containing 21–mediated ubiquitin proteasomal degradation. By interacting with tumor cells differentially expressing CD112 and CD155, intratumoral γδT cells exhibited varying degrees of activation and DNAM-1 expression, representing three major functional subsets. This study underscores the complexity of tumor–immune cross-talk, offering insights into how tumor heterogeneity shapes the immune landscape.Significance: Tumor cells in different intratumoral neighborhoods display divergent patterns of ligands that regulate γδT-cell activation, highlighting multilevel regulation of antitumor immunity resulting from the heterogeneity of intercellular interactions in the tumor microenvironment.
