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Chen J, Yang B, Cheng X, Qiao Y, Tang B, Chen G, Wei J, Liu X, Cheng W, Du P, Huang X, Jiang W, Hu Q, Hu Y, Li J, Hua ZC. Salmonella-mediated tumor-targeting TRAIL gene therapy significantly suppresses melanoma growth in mouse model. Cancer Sci 2011; 103:325-33. [DOI: 10.1111/j.1349-7006.2011.02147.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Katzke N, Arvani S, Bergmann R, Circolone F, Markert A, Svensson V, Jaeger KE, Heck A, Drepper T. A novel T7 RNA polymerase dependent expression system for high-level protein production in the phototrophic bacterium Rhodobacter capsulatus. Protein Expr Purif 2009; 69:137-46. [PMID: 19706327 DOI: 10.1016/j.pep.2009.08.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 08/19/2009] [Accepted: 08/20/2009] [Indexed: 10/20/2022]
Abstract
The functional expression of heterologous genes using standard bacterial expression hosts such as Escherichia coli is often limited, e.g. by incorrect folding, assembly or targeting of recombinant proteins. Consequently, alternative bacterial expression systems have to be developed to provide novel strategies for protein synthesis exceeding the repertoire of the standard expression host E. coli. Here, we report on the construction of a novel expression system that combines the high processivity of T7 RNA polymerase with the unique physiological properties of the facultative photosynthetic bacterium Rhodobacter capsulatus. This system basically consists of a recombinant R. capsulatus T7 expression strain (R. capsulatus B10S-T7) harboring the respective polymerase gene under control of a fructose inducible promoter. In addition, a set of different broad-host-range vectors (pRho) was constructed allowing T7 RNA polymerase dependent and independent target gene expression in R. capsulatus and other Gram-negative bacteria. The expression efficiency of the novel system was studied in R. capsulatus and E. coli using the yellow fluorescent protein (YFP) as model protein. Expression levels were comparable in both expression hosts and yielded up to 80mg/l YFP in phototrophically grown R. capsulatus cultures. This result clearly indicates that the novel R. capsulatus-based expression system is well suited for the high-level expression of soluble proteins.
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Affiliation(s)
- Nadine Katzke
- Institute of Molecular Enzyme Technology, Heinrich-Heine-University Duesseldorf, Forschungszentrum Juelich, Stetternicher Forst, D-52426 Juelich, Germany
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Yang X, Hinnebusch BJ, Trunkle T, Bosio CM, Suo Z, Tighe M, Harmsen A, Becker T, Crist K, Walters N, Avci R, Pascual DW. Oral vaccination with salmonella simultaneously expressing Yersinia pestis F1 and V antigens protects against bubonic and pneumonic plague. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2007; 178:1059-67. [PMID: 17202369 PMCID: PMC9809976 DOI: 10.4049/jimmunol.178.2.1059] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The gut provides a large area for immunization enabling the development of mucosal and systemic Ab responses. To test whether the protective Ags to Yersinia pestis can be orally delivered, the Y. pestis caf1 operon, encoding the F1-Ag and virulence Ag (V-Ag) were cloned into attenuated Salmonella vaccine vectors. F1-Ag expression was controlled under a promoter from the caf1 operon; two different promoters (P), PtetA in pV3, PphoP in pV4, as well as a chimera of the two in pV55 were tested. F1-Ag was amply expressed; the chimera in the pV55 showed the best V-Ag expression. Oral immunization with Salmonella-F1 elicited elevated secretory (S)-IgA and serum IgG titers, and Salmonella-V-Ag(pV55) elicited much greater S-IgA and serum IgG Ab titers than Salmonella-V-Ag(pV3) or Salmonella-V-Ag(pV4). Hence, a new Salmonella vaccine, Salmonella-(F1+V)Ags, made with a single plasmid containing the caf1 operon and the chimeric promoter for V-Ag allowed the simultaneous expression of F1 capsule and V-Ag. Salmonella-(F1+V)Ags elicited elevated Ab titers similar to their monotypic derivatives. For bubonic plague, mice dosed with Salmonella-(F1+V)Ags and Salmonella-F1-Ag showed similar efficacy (>83% survival) against approximately 1000 LD(50) Y. pestis. For pneumonic plague, immunized mice required immunity to both F1- and V-Ags because the mice vaccinated with Salmonella-(F1+V)Ags protected against 100 LD(50) Y. pestis. These results show that a single Salmonella vaccine can deliver both F1- and V-Ags to effect both systemic and mucosal immune protection against Y. pestis.
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Affiliation(s)
- Xinghong Yang
- Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
| | - B. Joseph Hinnebusch
- Laboratory of Zoonotic Pathogens, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Theresa Trunkle
- Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
| | - Catharine M. Bosio
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO 80521
| | - Zhiyong Suo
- Physics Department, Montana State University, Bozeman, MT 59717
| | - Mike Tighe
- Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
| | - Ann Harmsen
- Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
| | - Todd Becker
- Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
| | - Kathryn Crist
- Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
| | - Nancy Walters
- Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
| | - Recep Avci
- Physics Department, Montana State University, Bozeman, MT 59717
| | - David W. Pascual
- Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
- Address correspondence and reprint requests to Dr. David W. Pascual, Veterinary Molecular Biology, Montana State University, P.O. Box 173610, Bozeman, MT 59717-3610.
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Salam MA, Katz J, Zhang P, Hajishengallis G, Michalek SM. Immunogenicity of Salmonella vector vaccines expressing SBR of Streptococcus mutans under the control of a T7-nirB (dual) promoter system. Vaccine 2006; 24:5003-15. [PMID: 16621196 DOI: 10.1016/j.vaccine.2006.03.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2005] [Revised: 03/14/2006] [Accepted: 03/16/2006] [Indexed: 11/16/2022]
Abstract
The purpose of the present study was to determine if a Salmonella vector expressing the cloned saliva-binding region (SBR) of Streptococcus mutans or SBR linked to the A2 and B subunits of cholera toxin (CTA2/B) under the control of both the T7 and nirB promoters (T7-nirB dual promoter) was more effective in inducing mucosal and systemic anti-SBR antibody responses than Salmonella clones expressing the same antigens but under the control of either the nirB or T7 promoter. Mice were immunized by the intranasal route on days 0, 18 and 320 with Salmonella enterica serovar Typhimurium strain BRD 509 containing one of six plasmids encoding SBR or SBR-CTA2/B under the control of the T7-nirB, T7, or nirB promoter. Serum, saliva and vaginal wash samples were collected throughout the experiment and assessed for antibody activity by ELISA. Evidence is provided that Salmonella clones expressing SBR or SBR-CAT2/B under the control of either the T7 or T7-nirB promoter induced a high and persistent mucosal and systemic anti-SBR antibody response. All Salmonella clones induced good anti-SBR responses following the boost on day 320.
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Affiliation(s)
- Mohammad Abdus Salam
- Department of Microbiology, University of Alabama at Birmingham, 845 19th Street South, BBRB 258/5, 35294-2170, USA
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Lee SK, Keasling JD. A Salmonella-based, propionate-inducible, expression system for Salmonella enterica. Gene 2006; 377:6-11. [PMID: 16616438 DOI: 10.1016/j.gene.2006.02.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2005] [Revised: 02/17/2006] [Accepted: 02/22/2006] [Indexed: 11/28/2022]
Abstract
The expression and regulatory properties of a propionate-regulated overexpression system (Salmonella enterica prpBCDE promoter (P(prpB)) and positive regulator (prpR)) were evaluated in wild-type S. enterica serovar Typhimurium TR6583 and prpB(-) or prpD(-) versions of this strain and compared with the arabinose-regulated T7 expression system. The wild-type strain showed low expression in the absence of propionate and high expression in the presence of propionate under all growth conditions. In 96-well plates and culture tubes, the wild-type strain exhibited a long delay before full induction; the time delay was significantly shorter in shake flasks. The prpD(-) strain exhibited low expression in the presence of glucose, highly regulatable expression over a wide range of propionate concentrations, and, in contrast to the wild-type strain, fast induction to full expression under all growth conditions. In contrast, the prpB(-) strain showed very high background expression in both culture tubes and shake flasks.
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Affiliation(s)
- Sung Kuk Lee
- Department of Chemical Engineering, University of California, Berkeley, 94720, USA
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