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Hadi SA, Brenner EP, Palmer MV, Waters WR, Thacker TC, Vilchèze C, Larsen MH, Jacobs WR, Sreevatsan S. Mycobacterium bovis Strain Ravenel Is Attenuated in Cattle. Pathogens 2022; 11:1330. [PMID: 36422582 PMCID: PMC9699013 DOI: 10.3390/pathogens11111330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/19/2022] [Accepted: 11/08/2022] [Indexed: 08/02/2023] Open
Abstract
Mycobacterium tuberculosis variant bovis (MBO) has one of the widest known mammalian host ranges, including humans. Despite the characterization of this pathogen in the 1800s and whole genome sequencing of a UK strain (AF2122) nearly two decades ago, the basis of its host specificity and pathogenicity remains poorly understood. Recent experimental calf infection studies show that MBO strain Ravenel (MBO Ravenel) is attenuated in the cattle host compared to other pathogenic strains of MBO. In the present study, experimental infections were performed to define attenuation. Whole genome sequencing was completed to identify regions of differences (RD) and single nucleotide polymorphisms (SNPs) to explain the observed attenuation. Comparative genomic analysis of MBO Ravenel against three pathogenic strains of MBO (strains AF2122-97, 10-7428, and 95-1315) was performed. Experimental infection studies on five calves each, with either MBO Ravenel or 95-1315, revealed no visible lesions in all five animals in the Ravenel group despite robust IFN-γ responses. Out of 486 polymorphisms in the present analysis, 173 were unique to MBO Ravenel among the strains compared. A high-confidence subset of nine unique SNPs were missense mutations in genes with annotated functions impacting two major MBO survival and virulence pathways: (1) Cell wall synthesis & transport [espH (A103T), mmpL8 (V888I), aftB (H484Y), eccC5 (T507M), rpfB (E263G)], and (2) Lipid metabolism & respiration [mycP1(T125I), pks5 (G455S), fadD29 (N231S), fadE29 (V360G)]. These substitutions likely contribute to the observed attenuation. Results from experimental calf infections and the functional attributions of polymorphic loci on the genome of MBO Ravenel provide new insights into the strain's genotype-disease phenotype associations.
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Affiliation(s)
- Syeda A. Hadi
- Pathobiology and Diagnostic Investigation Department, Michigan State University, East Lansing, MI 48824, USA
| | - Evan P. Brenner
- Pathobiology and Diagnostic Investigation Department, Michigan State University, East Lansing, MI 48824, USA
| | - Mitchell V. Palmer
- National Animal Disease Center, Agricultural Research Service, US Department of Agriculture, Ames, IA 50010, USA
| | - W. Ray Waters
- National Animal Disease Center, Agricultural Research Service, US Department of Agriculture, Ames, IA 50010, USA
| | - Tyler C. Thacker
- National Veterinary Services Laboratories, US Department of Agriculture, Ames, IA 50010, USA
| | - Catherine Vilchèze
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10475, USA
| | - Michelle H. Larsen
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10475, USA
| | - William R. Jacobs
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10475, USA
| | - Srinand Sreevatsan
- Pathobiology and Diagnostic Investigation Department, Michigan State University, East Lansing, MI 48824, USA
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da Luz JZ, Machado TN, Bezerra AG, de Oliveira Ribeiro CA, Neto FF. Cytotoxicity of bismuth nanoparticles in the murine macrophage cell line RAW 264.7. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:95. [PMID: 33128626 DOI: 10.1007/s10856-020-06427-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
A promising use of bismuth nanoparticles (BiNPs) for different biomedical applications leads to a search for the elucidation of their toxicity mechanisms, since toxicity studies are still at early stage. In the current study, cytotoxic effects of BiNPs produced by laser ablation in solution (LASiS) was investigated in the murine macrophage line RAW 264.7. The cells were exposed to 0.01-50 µg ml-1 of BiNPs for 24 and 48 h and then cytotoxicity assays were performed. Decrease of MTT conversion to formazan and of cell attachment were observed with no effects on cell proliferation. No loss of membrane integrity or significant changes of ROS and RNS levels were observed in exposed cells. Foremost, increased phagocytic activity and DNA repair foci occurred for cells exposed to BiNPs. These effects are important findings that must be considered in the case of biomedical application of BiNPs, since inappropriate macrophages activation and inactivation may lead to immunotoxicity. Bismuth nanoparticles (BiNPs) produced by laser ablation in solution and stabilized with BSA decrease enzyme-dependent MTT conversion to formazan and increase phagocytic activity and DNA repair foci in murine macrophage line RAW 264.7 when exposed to 50 µg ml-1. These effects are findings that should be considered in the case of biomedical application of BiNPs, since inappropriate macrophages activation and inactivation may lead to immunotoxicity.
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Affiliation(s)
- Jessica Zablocki da Luz
- Laboratório de Toxicologia Celular, Departamento de Biologia Celular, Universidade Federal do Paraná, Curitiba, PR, CEP 81.531-990, Brazil.
| | - Thiago Neves Machado
- Laboratório Fotonanobio, Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, Curitiba, PR, CEP 80.230-901, Brazil
| | - Arandi Ginane Bezerra
- Laboratório Fotonanobio, Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, Curitiba, PR, CEP 80.230-901, Brazil
| | - Ciro Alberto de Oliveira Ribeiro
- Laboratório de Toxicologia Celular, Departamento de Biologia Celular, Universidade Federal do Paraná, Curitiba, PR, CEP 81.531-990, Brazil
| | - Francisco Filipak Neto
- Laboratório de Toxicologia Celular, Departamento de Biologia Celular, Universidade Federal do Paraná, Curitiba, PR, CEP 81.531-990, Brazil.
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Sigola LB, Fuentes AL, Millis LM, Vapenik J, Murira A. Effects of Toll-like receptor ligands on RAW 264.7 macrophage morphology and zymosan phagocytosis. Tissue Cell 2016; 48:389-96. [PMID: 27157550 DOI: 10.1016/j.tice.2016.04.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 02/01/2016] [Accepted: 04/21/2016] [Indexed: 01/21/2023]
Abstract
In this study we compared the effects of the Toll-like receptor (TLR) ligands lipopolysaccharide (LPS), flagellin, the synthetic bacterial triacylated lipopeptide Pam3-Cys-Ser-Lys4 (Pam3CSK4), Polyinosinic:polycytidylic acid (Poly I:C), and macrophage-activating lipopeptide (MALP-2), which are TLR4, TLR5, TLR1/2, TLR3, and TLR2/6 agonists, respectively, on cell morphology and phagocytosis of zymosan particles, derived from Saccharomyces cerevisiae, and rich in fungal PAMPs including beta-glucan, mannose, and chitin. LPS, Pam3CSK4, and MALP-2 induced an activated macrophage phenotype and enhanced zymosan phagocytosis. In contrast, flagellin and Poly I:C, respectively, had little effect on cell morphology and phagocytosis. We examined the role of scavenger receptor A (SR-A) on zymosan phagocytosis. Cells cultured in medium alone expressed SR-A, and LPS induced further expression of the receptor. We also observed inhibitory effects of scavenger receptor antagonists fucoidan, dextran sulphate, and Polyinosinic (Poly I), respectively, on zymosan phagocytosis of cells in medium alone and those pre-treated with LPS. We conclude that exposure to specific TLR ligands impacts both cellular morphology and phagocytic capacity, and that scavenger receptors contribute to zymosan ingestion as well as LPS-induced augmentation of phagocytosis.
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Affiliation(s)
- Lynette B Sigola
- Biology Department, Douglas College, P.O. Box 2503, New Westminster B.C. V3L 5B2, Canada.
| | - Ana-Lucía Fuentes
- Biology Department, Douglas College, P.O. Box 2503, New Westminster B.C. V3L 5B2, Canada
| | - Leonard M Millis
- Biology Department, Douglas College, P.O. Box 2503, New Westminster B.C. V3L 5B2, Canada
| | - Jacqueline Vapenik
- Faculty of Health Sciences, Douglas College, P.O. Box 2503, New Westminster B.C. V3L 5B2, Canada
| | - Armstrong Murira
- Department of Molecular Biology and Biochemistry, Simon Fraser University, 8888 University Drive, Burnaby, B.C. V5A 1S6 Canada
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Ohashi T, Minamishima Y, Yokokura T, Mutai M. Induction of resistance in mice against murine cytomegalovirus by cellular components of Lactobacillus casei. BIOTHERAPY (DORDRECHT, NETHERLANDS) 1989; 1:89-95. [PMID: 2484292 DOI: 10.1007/bf02170139] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Recently, we reported that heat-killed Lactobacillus casei (LC) protected mice from murine cytomegalovirus (MCMV) infection by augmentation of natural killer (NK) cell activity. In the present study, we examined which components of LC cell induce the nonspecific resistance most effectively. Whole cell preparation of original LC, susceptible to bacteriophages SG-T and J1, was more effective than its mutants resistant to either bacteriophage. Although the activity of LC cells decreased upon fractionation, cell wall fractions were more active than cytoplasmic fractions. Glycoprotein (GP), a cell wall constituent, was a potent inducer of the resistance. The relative activity of cellular components to induce the resistance was evaluated by a protection index, a ratio of plaque-forming units (PFU) per 50% lethal dose (LD50) for treated mice to that for untreated mice. The protection indices of LC cells and GP were approximately 80 and 28, respectively. The protective effect of GP was evidenced by a decrease in titers of infectious viruses replicated in the target organs. Not only LC cells but also GP, although to a lesser degree, enhanced NK cell activity both in uninfected mice and MCMV-infected mice. The activity of LC cells and GP to augment NK cell activity correlated with the protection index. GP treatment did not modify interferon (IFN) production during MCMV infection. Thus, GP of LC cells seems to be the active principle to endow mice with resistance to MCMV.
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Affiliation(s)
- T Ohashi
- Department of Microbiology, Miyazaki Medical College, Japan
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Adams DO, Hamilton TA. The activated macrophage and granulomatous inflammation. CURRENT TOPICS IN PATHOLOGY. ERGEBNISSE DER PATHOLOGIE 1989; 79:151-67. [PMID: 2644083 DOI: 10.1007/978-3-642-73855-5_7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Kato K, Nakane A, Minagawa T, Kasai N, Yamamoto K, Sato N, Tsuruoka N. Human tumor necrosis factor increases the resistance against Listeria infection in mice. Med Microbiol Immunol 1989; 178:337-46. [PMID: 2559307 DOI: 10.1007/bf00197452] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The resistance in mice against Listeria infection was augmented by treatment with recombinant human tumor necrosis factor (TNF). To elucidate this phenomenon, we examined the effect of TNF on macrophage activation. TNF-treated macrophages had listericidal activity in vitro and superoxide anion production. In addition, macrophage migration was inhibited in the presence of TNF. Therefore, activation of macrophages by TNF was similar to activation by macrophage-activating factor or macrophage-migration-inhibitory factor.
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Affiliation(s)
- K Kato
- Department of Internal Medicine, Tomakomai City Hospital, Japan
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Kimura T, Sasaki A, Kato K, Kakinuma M, Yamamoto K. Parallelism between superoxide production of peritoneal exudate cells and lung granulomatous response in mice vaccinated with BCG cell walls. Immunobiology 1986; 173:12-22. [PMID: 3026956 DOI: 10.1016/s0171-2985(86)80085-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Since peritoneal macrophages are reported to be different from alveolar macrophages in their activated states, we examined whether O-2 production, one of the parameters of macrophage activation, in mouse peritoneal exudate cells (PEC) is enhanced under the condition in which lung granuloma, the accumulation of activated macrophages, is produced with Bacillus Calmette-Guérin (BCG) cell wall (CW). As a result, we observed the enhanced O-2 production of PEC that occurs in parallel with lung granuloma formation; high responders, C56BL/6 mice, showed high O-2 production of PEC whereas low responders, C3H/He and DBA/1 mice showed low O-2 production of PEC, suggesting that enhanced O-2 production of PEC as well as lung granuloma formation is genetically controlled. Results from T cell-depleted mice and allogeneic bone marrow chimeric mice also showed the occurrence of this parallelism. From these findings, we presumed that circulating macrophage activating factor and other lymphokines produced by BCG CW-sensitized T cells may activate both peritoneal macrophages and lung macrophages.
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Killed Listeria-induced suppressor T cells involved in suppression of delayed-type hypersensitivity and protection against Listeria infection. Immunology 1985; 55:609-19. [PMID: 2410356 PMCID: PMC1453778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Pretreatment of mice by intravenous injection with killed Listeria provided neither delayed-type hypersensitivity to Listeria protoplasm nor protection against Listeria infection. Assuming that this suppression is due to suppressor cells, we attempted to clarify their induction and characterization. Pretreatment with killed BCG instead of killed Listeria suppressed the induction of DTH and protection in subsequent Listeria-immunized mice. Conversely, pretreatment with killed Listeria suppressed subsequent induction of DTH to PPD or protection from tuberculosis. Thus, these suppressions were induced antigen nonspecifically. Transfer of splenic non-adherent cells from killed Listeria-injected mice which had been treated with anti-BA theta serum plus complement, or had been passed through Sephadex G-10 columns, resulted in both afferent and efferent DTH suppression, suggesting that the DTH suppression is closely associated with suppressor T cells. Moreover, the splenic nonadherent cells from killed Listeria-injected mice showed suppression in vitro of listericidal activity of PEC from Listeria-immune mice in the presence of Listeria protoplasm.
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