CGAS and monocytic leukemia: To determine the role of endogenous gigaxonin in cGAS‐mediated antiviral immune responses, we established a stable gigaxonin‐knockdown human monocytic leukemia cell line, THP‐1, via shRNA transduction and treated the cells with HSV‐1 infection or herring testis‐DNA (HT‐DNA) transfection.