DRG2 in macrophages is crucial for initial inflammatory response and protection against Listeria monocytogenes infection

• Published in: Clinical immunology (Orlando, Fla.) Vol. 257; p. 109819
• Main Authors: Lee, Unn Hwa, Park, Sang Jin, Ju, Seong A, Lee, Sang Chul, Kim, Byung Sam, Ahn, Byungyong, Yi, Jawoon, Park, Jihwan, Won, Young-Wook, Han, In Seob, Lee, Byung Ju, Cho, Wha Ja, Park, Jeong Woo
• Format: Journal Article
• Language: English
• Published: United States 01.12.2023
• Subjects: Animals; GTP-Binding Proteins - metabolism; Immunity, Innate; Listeria monocytogenes; Listeriosis - immunology; Macrophages - immunology; Mice; Mice, Knockout; Monocytes; Tissue-resident macrophages; NF-κB; DRG2; Inflammatory response; L. monocytogenes
• ISSN: 1521-6616; 1521-7035
• DOI: 10.1016/j.clim.2023.109819

Innate immune response is critical for the control of Listeria monocytogenes infection. Here, we identified developmentally regulated GTP-binding protein 2 (DRG2) in macrophages as a major regulator of the innate immune response against L. monocytogenes infection. Both whole-body DRG2 knockout (KO) mice and macrophage-specific DRG2 KO mice had low levels of IL-6 during early infection and increased susceptibility to L. monocytogenes infection. Following an initial impaired inflammatory response of macrophages upon i.p. L. monocytogenes infection, DRG2 mice showed delayed recruitment of neutrophils and monocytes into the peritoneal cavity, which led to elevated bacterial burden, inflammatory cytokine production at a late infection time point, and liver micro-abscesses. DRG2 deficiency decreased the transcriptional activity of NF-κB and impaired the inflammatory response of both bone marrow-derived and peritoneal macrophages upon L. monocytogenes stimulation. Our findings reveal that DRG2 in macrophages is critical for the initial inflammatory response and protection against L. monocytogenes infection.