PMID- 33743606 OWN - NLM STAT- MEDLINE DCOM- 20211206 LR - 20211214 IS - 1471-2172 (Electronic) IS - 1471-2172 (Linking) VI - 22 IP - 1 DP - 2021 Mar 21 TI - A putative exosporium lipoprotein GBAA0190 of Bacillus anthracis as a potential anthrax vaccine candidate. PG - 20 LID - 10.1186/s12865-021-00414-y [doi] LID - 20 AB - BACKGROUND: Bacillus ancthracis causes cutaneous, pulmonary, or gastrointestinal forms of anthrax. B. anthracis is a pathogenic bacterium that is potentially to be used in bioterrorism because it can be produced in the form of spores. Currently, protective antigen (PA)-based vaccines are being used for the prevention of anthrax, but it is necessary to develop more safe and effective vaccines due to their prolonged immunization schedules and adverse reactions. METHODS: We selected the lipoprotein GBAA0190, a potent inducer of host immune response, present in anthrax spores as a novel potential vaccine candidate. Then, we evaluated its immune-stimulating activity in the bone marrow-derived macrophages (BMDMs) using enzyme-linked immunosorbent assay (ELISA) and Western blot analysis. Protective efficacy of GBAA0190 was evaluated in the guinea pig (GP) model. RESULTS: The recombinant GBAA0190 (r0190) protein induced the expression of various inflammatory cytokines including tumor necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6), monocyte chemoattractant protein-1 (MCP-1), and macrophage inflammatory protein-1alpha (MIP-1alpha) in the BMDMs. These immune responses were mediated through toll-like receptor 1/2 via activation of mitogen-activated protein (MAP) kinase and Nuclear factor-kappaB (NF-kappaB) pathways. We demonstrated that not only immunization of r0190 alone, but also combined immunization with r0190 and recombinant PA showed significant protective efficacy against B. anthracis spore challenges in the GP model. CONCLUSIONS: Our results suggest that r0190 may be a potential target for anthrax vaccine. FAU - Jeon, Jun Ho AU - Jeon JH AD - Division of High-risk Pathogens, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, 28159, Republic of Korea. FAU - Kim, Yeon Hee AU - Kim YH AD - Division of High-risk Pathogens, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, 28159, Republic of Korea. FAU - Kim, Kyung Ae AU - Kim KA AD - Division of High-risk Pathogens, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, 28159, Republic of Korea. FAU - Kim, Yu-Ri AU - Kim YR AD - Division of High-risk Pathogens, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, 28159, Republic of Korea. FAU - Woo, Sun-Je AU - Woo SJ AD - Division of High-risk Pathogens, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, 28159, Republic of Korea. FAU - Choi, Ye Jin AU - Choi YJ AD - Division of High-risk Pathogens, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, 28159, Republic of Korea. FAU - Rhie, Gi-Eun AU - Rhie GE AD - Division of High-risk Pathogens, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, 28159, Republic of Korea. gerhie@korea.kr. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210321 PL - England TA - BMC Immunol JT - BMC immunology JID - 100966980 RN - 0 (Anthrax Vaccines) RN - 0 (Cytokines) RN - 0 (Lipoproteins) RN - 0 (NF-kappa B) RN - 0 (Recombinant Proteins) RN - 0 (Toll-Like Receptors) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) SB - IM MH - Animals MH - Anthrax/*prevention & control MH - Anthrax Vaccines/administration & dosage/genetics/*immunology MH - Bacillus anthracis/*immunology MH - Cytokines/metabolism MH - Guinea Pigs MH - Immunization MH - Lipoproteins/administration & dosage/genetics/*immunology MH - Macrophages/immunology/metabolism MH - Mice MH - Mitogen-Activated Protein Kinases/metabolism MH - NF-kappa B/metabolism MH - Recombinant Proteins/administration & dosage/genetics/immunology MH - Signal Transduction MH - Spores, Bacterial/immunology MH - Toll-Like Receptors/metabolism PMC - PMC7981958 OTO - NOTNLM OT - Anthrax OT - Bacillus anthracis OT - Exosporium lipoprotein OT - Vaccine COIS- The authors declare that they have no competing interests. EDAT- 2021/03/22 06:00 MHDA- 2021/12/15 06:00 PMCR- 2021/03/21 CRDT- 2021/03/21 20:26 PHST- 2020/11/20 00:00 [received] PHST- 2021/03/10 00:00 [accepted] PHST- 2021/03/21 20:26 [entrez] PHST- 2021/03/22 06:00 [pubmed] PHST- 2021/12/15 06:00 [medline] PHST- 2021/03/21 00:00 [pmc-release] AID - 10.1186/s12865-021-00414-y [pii] AID - 414 [pii] AID - 10.1186/s12865-021-00414-y [doi] PST - epublish SO - BMC Immunol. 2021 Mar 21;22(1):20. doi: 10.1186/s12865-021-00414-y.