Furthermore, endothelial Sting activation by Cgas cells-derived CM was dramatically weakened after Lrrc8c knockdown, as shown by decreased phosphorylation of Sting and Tbk1, as well as Ifnβ and ISGs expressions (Fig. 5f, g), together suggesting that cGAMP produced by liver cancer cells is secreted out of the cell through LRRC8C channels, thereby activating STING of endothelial cells. The gene discussed is TBK1; the disease is liver cancer.