STING1 and neoplasm: We found that WT mice implanted with Cgas-proficient cells developed significantly smaller tumors than WT mice injected with parental cells (Fig. 2a, b), while Sting−/− mice implanted with Cgas-proficient cells developed comparable tumors than parental ctrl cells (Fig. 2c, d), suggesting that tumor cGAS-caused tumor repression depends on host STING.