title: Tumor suppressor p53 protects mice against Listeria monocytogenes infection.
abstract: Tumor suppressor p53 is involved in regulating immune responses, which contribute to antitumor and antiviral activity. However, whether p53 has anti-bacterial functions remains unclear. Listeria monocytogenes (LM) causes listeriosis in humans and animals, and it is a powerful model for studying innate and adaptive immunity. In the present study, we illustrate an important regulatory role of p53 during LM infection. p53 knockout (p53KO) mice were more susceptible to LM infection, which was manifested by a shorter survival time and lower survival rate. p53KO mice showed significant impairments in LM eradication. Knockdown of p53 in RAW264.7 and HeLa cells resulted in increased invasion and intracellular survival of LM. Furthermore, the invasion and intracellular survival of LM was inhibited in p53-overexpressing RAW264.7 and HeLa cells. LM-infected p53KO mice exhibited severe clinical symptoms and organ injury, presumably because of the abnormal production of the pro-inflammatory cytokines TNF-α, IL-6, IL-12, and IL-18. Decreased IFN-γ and GBP1 productions were observed in LM-infected p53-deficient mice or cells. The combination of these defects likely resulted in the overwhelming LM infection in the p53KO mice. These observations indicate that p53 serves as an important regulator of the host innate immune that protects against LM infection.
authors.affiliation: Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China.
authors.forename: Shaohui
authors.initials: S
authors.lastname: Wang
authors.affiliation: Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China.
authors.forename: Pingping
authors.initials: P
authors.lastname: Liu
authors.affiliation: Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China.
authors.forename: Jianchao
authors.initials: J
authors.lastname: Wei
authors.affiliation: Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China.|State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China.
authors.forename: Zixiang
authors.initials: Z
authors.lastname: Zhu
authors.affiliation: Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China.
authors.forename: Zixue
authors.initials: Z
authors.lastname: Shi
authors.affiliation: Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China.
authors.forename: Donghua
authors.initials: D
authors.lastname: Shao
authors.affiliation: Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518, Ziyue Road, Shanghai 200241, China.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Ma
mesh_terms: D000818:Animals; D016207:Cytokines / Q000235:genetics / Q000276:immunology*; D006367:HeLa Cells; D006801:Humans; D007113:Immunity, Innate; D008089:Listeria monocytogenes / Q000276:immunology*; D008088:Listeriosis / Q000235:genetics / Q000276:immunology* / Q000473:pathology; D051379:Mice; D018345:Mice, Knockout; D000067996:RAW 264.7 Cells; D016159:Tumor Suppressor Protein p53 / Q000235:genetics / Q000276:immunology*
chemical_list: D016207:Cytokines; D016159:Tumor Suppressor Protein p53