1
|
Oliveira RDC, de Oliveira Júnior CA, Alves GG, Assis RA, Silva ROS, de Sousa Xavier MA, Lobato FCF. Cattle and goats' humoral response to vaccination with Clostridium perfringens type D purified epsilon toxoids. Anaerobe 2021; 72:102465. [PMID: 34662696 DOI: 10.1016/j.anaerobe.2021.102465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 10/14/2021] [Accepted: 10/15/2021] [Indexed: 11/30/2022]
Abstract
Herd vaccination is an important preventive measure against enterotoxemia in ruminants. Vaccination in goats should be performed every four months, and recent studies have shown that immunity in cattle lasts for less than one year. One of the mechanisms for increasing the duration of the immune response is to use purified toxoids as immunogens. The aim of the present study was to evaluate the humoral response in cattle and goats after vaccination with purified and semi-purified Clostridium perfringens type D epsilon toxoid. The following three different vaccines were used: vaccine 1 (V1), a semi-purified toxoid adsorbed to aluminum hydroxide; vaccine 2 (V2), a purified toxoid adsorbed to aluminum hydroxide; and vaccine (V3), a purified toxoid adsorbed on chitosan microparticles. Groups of cattle (n = 6-7) and goats (n = 6-7) were vaccinated on days 0 and 30, and serum samples for antitoxin titration were collected every 30 days for one-year post-vaccination. Goats were revaccinated on day 360, and their serum was evaluated on days 367 and 374. The antibody peaks ranged between 6.90 and 11.47 IU/mL in cattle and from 1.11 to 4.40 IU/mL in goats. In cattle administered with the V1 and V2 vaccines, we observed that the antibody titers were maintained above 0.2 IU/mL until the end of the experiment. In goats, V2 elicited long-lasting antibodies, and all animals maintained the protective titers for 210 days after the first dose. In conclusion, the purified toxoid vaccine with aluminum hydroxide adjuvant was able to induce strong and long-lasting humoral responses in both species and could be an alternative for improving the immunization schedule against enterotoxemia in goats and cattle.
Collapse
Affiliation(s)
- Ricardo de Castro Oliveira
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, CEP 31.270-901, MG, Brazil; Merck Sharp & Dohme (MSD), Avenida Comendador Loureiro Ramos, 1500, Montes Claros, CEP 39.404-003, MG, Brazil
| | - Carlos Augusto de Oliveira Júnior
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, CEP 31.270-901, MG, Brazil
| | - Guilherme Guerra Alves
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, CEP 31.270-901, MG, Brazil
| | - Ronnie Antunes Assis
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, CEP 31.270-901, MG, Brazil; Merck Sharp & Dohme (MSD), Avenida Comendador Loureiro Ramos, 1500, Montes Claros, CEP 39.404-003, MG, Brazil
| | - Rodrigo Otávio Silveira Silva
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, CEP 31.270-901, MG, Brazil
| | - Mauro Aparecido de Sousa Xavier
- Universidade Estadual de Montes Claros (UNIMONTES), Avenida, Professor Rui Braga, S/N Montes Claros, CEP 39.401-089, MG, Brazil
| | - Francisco Carlos Faria Lobato
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, CEP 31.270-901, MG, Brazil.
| |
Collapse
|
2
|
Measurement over 1 Year of Neutralizing Antibodies in Cattle Immunized with Trivalent Vaccines Recombinant Alpha, Beta and Epsilon of Clostridium perfringens. Toxins (Basel) 2021; 13:toxins13090594. [PMID: 34564599 PMCID: PMC8470993 DOI: 10.3390/toxins13090594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 11/17/2022] Open
Abstract
The alpha (CPA), beta (CPB) and epsilon (ETX) toxins of Clostridium perfringens are responsible for causing diseases that are difficult to eradicate and have lethal potential in production animals. Vaccination of herds is still the best control strategy. Recombinant clostridial vaccines have shown good success at inducing neutralizing antibody titers and appear to be a viable alternative to the conventional production of commercial clostridial toxoids. Research is still needed on the longevity of the humoral immune response induced by recombinant proteins in immunized animals, preferably in target species. The objective of this study was to measure the humoral immune response of cattle immunized with trivalent vaccines containing the recombinant proteins alpha (rCPA), beta (rCPB) and epsilon (rETX) of C. perfringens produced in Escherichia coli at three different concentrations (100, 200, and 400 µg) of each protein for 12 months. The recombinant vaccines containing 200 (RV2) and 400 µg (RV3) yielded statistically similar results at 56 days. They performed better throughout the study period because they induced higher neutralizing antibody titers and were detectable for up to 150 and 180 days, respectively. Regarding industrial-scale production, RV2 would be the most economical and viable formulation as it achieved results similar to RV3 at half the concentration of recombinant proteins in its formulation. However, none of the vaccines tested induced the production of detectable antibody titers on day 365 of the experiment, the time of revaccination typically recommended in vaccination protocols. Thus, reiterating the need for research in the field of vaccinology to achieve greater longevity of the humoral immune response against these clostridial toxins in animals, in addition to the need to discuss the vaccine schedules and protocols adopted in cattle production.
Collapse
|
3
|
Alves GG, Gonçalves LA, Assis RA, Oliveira Júnior CAD, Silva ROS, Heneine LGD, Lobato FCF. Production and purification of Clostridium perfringens type D epsilon toxin and IgY antitoxin. Anaerobe 2021; 69:102354. [PMID: 33675994 DOI: 10.1016/j.anaerobe.2021.102354] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/09/2021] [Accepted: 02/24/2021] [Indexed: 12/13/2022]
Abstract
The aim of this study was to purify Clostridium perfringens type D epsilon toxin and produce and purify anti-epsilon chicken immunoglobulin Y (IgY). A single-step ion exchange chromatography resulted in a high-yield and high-purity toxin, while ion exchange chromatography followed by gel filtration resulted in the highest purity of the toxin, but at a lower yield. Purified and inactivated epsilon toxin were then administered in chickens via four inoculations and IgY was obtained at a high purity and yield, with an antibody titer of 50 IU/mL and high levels of avidity (73.2%). In summary, C. perfringens type D epsilon toxin and chicken anti-epsilon IgY were successfully produced and purified, and may be used for the diagnosis of enterotoxemia caused by the epsilon toxin, as well as in potency tests of existing and future vaccines against enterotoxemia.
Collapse
Affiliation(s)
- Guilherme Guerra Alves
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, MG, CEP 31.270-901, Brazil
| | - Luciana Aramuni Gonçalves
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, MG, CEP 31.270-901, Brazil
| | - Ronnie Antunes Assis
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, MG, CEP 31.270-901, Brazil
| | - Carlos Augusto de Oliveira Júnior
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, MG, CEP 31.270-901, Brazil
| | - Rodrigo Otávio Silveira Silva
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, MG, CEP 31.270-901, Brazil
| | | | - Francisco Carlos Faria Lobato
- Veterinary School, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos, 6627, Belo Horizonte, MG, CEP 31.270-901, Brazil.
| |
Collapse
|
4
|
Alibeiki M, Golchin M, Tabatabaei M. Development of a double-recombinant antibody sandwich ELISA for quantitative detection of epsilon toxoid concentration in inactivated Clostridium perfringens vaccines. BMC Vet Res 2020; 16:361. [PMID: 32993643 PMCID: PMC7525996 DOI: 10.1186/s12917-020-02572-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 09/15/2020] [Indexed: 11/20/2022] Open
Abstract
Background Epsilon toxin (ETX) causes a commonly fatal enterotoxemia in domestic animals. Also, ETX causes serious economic losses to animal husbandry. In this study, we selected several clones against ETX using repertoires displayed on filamentous phage. Anti-ETX specific clones were enriched by binding to immobilized antigen, followed by elution and re-propagation of phage. After multiple rounds of binding selection, ELISA analysis showed that most isolated clones had high affinity and specificity for ETX. Results Two recombinant monoclonal antibodies against ETX were isolated by phage display technology. B1 phage VH antibody isolated from DAb library and G2 soluble scFv antibody isolated from Tomlinson I + J libraries have been applied as the capture and detection antibodies for developing an ETX sandwich ELISA test, respectively. Conclusions Designed ETX sandwich ELISA could be a valuable tool for quantitative detection of ETX in inactivated commercial vaccines against enterotoxemia. Graphical abstract ![]()
Collapse
Affiliation(s)
- Maryam Alibeiki
- Department of Pathobiology, Faculty of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Mehdi Golchin
- Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Mohammad Tabatabaei
- Department of Pathobiology, Faculty of Veterinary Medicine, Shiraz University, Shiraz, Iran.
| |
Collapse
|
5
|
Santos FDS, Ferreira MRA, Maubrigades LR, Gonçalves VS, de Lara APS, Moreira C, Salvarani FM, Conceição FR, Leivas Leite FP. Bacillus toyonensis BCT-7112 T transient supplementation improves vaccine efficacy in ewes vaccinated against Clostridium perfringens epsilon toxin. J Appl Microbiol 2020; 130:699-706. [PMID: 32767796 DOI: 10.1111/jam.14814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 07/06/2020] [Accepted: 07/27/2020] [Indexed: 01/17/2023]
Abstract
AIM The aim of the present study was to examine the vaccine immune response in ewes supplemented with Bacillus toyonensis BCT-7112T during a period of 5-day supplementation before vaccination against a recombinant Clostridium perfringens epsilon toxin (rETX). METHODS AND RESULTS Ewes were vaccinated with 200 µg of rETX adjuvanted with 10% aluminium hydroxide. The treat group was orally supplemented with B. toyonensis BCT-7112T (3 × 108 viable spores) for 5 days prior to the first and second vaccination. Ewes supplemented with B. toyonensis BCT-7112T showed higher neutralizing antibody titres than the non-supplemented ewes (P < 0·05), with an increase in serum levels for total IgG anti-rETX by 3·2-fold (P < 0·0001), and for both IgG isotypes IgG1 and IgG2 by 2·1-fold and 2·3-fold (P < 0·01), respectively, compared with the control group. The peripheral blood mononuclear cells of ewes in the supplemented group had a higher (P < 0·05) cytokine mRNA transcription levels for IL-2 (6·4-fold increase), IFN-γ (2·9-fold increase) and transcription factor Bcl6 (2·3-fold increase) compared with the control group. CONCLUSION We conclude that a 5 days of supplementation with B. toyonensis BCT-7112T prior vaccination is sufficient to significantly improve the humoral immune response of ewes against C. perfringens recombinant ETX vaccine. SIGNIFICANCE AND IMPACT OF THE STUDY These findings open a new perspective in the utilization of B. toyonensis BCT-7112T as an immunomodulator since a 5 days period of probiotic supplementation is sufficient to improve the vaccine immune response.
Collapse
Affiliation(s)
- F D S Santos
- Center for Technological Development, Postgraduate Program in Biotechnology, Federal University of Pelotas, Pelotas, Brazil
| | - M R A Ferreira
- Center for Technological Development, Postgraduate Program in Biotechnology, Federal University of Pelotas, Pelotas, Brazil
| | - L R Maubrigades
- Center for Technological Development, Postgraduate Program in Biotechnology, Federal University of Pelotas, Pelotas, Brazil
| | - V S Gonçalves
- Center for Technological Development, Postgraduate Program in Biotechnology, Federal University of Pelotas, Pelotas, Brazil
| | - A P S de Lara
- Institute of Biology, Postgraduate Program in Parasitology, Federal University of Pelotas, Pelotas, Brazil
| | - C Moreira
- Center for Technological Development, Postgraduate Program in Biotechnology, Federal University of Pelotas, Pelotas, Brazil
| | - F M Salvarani
- Institute of Veterinary Medicine, Federal University of Pará, Castanhal, Brazil
| | - F R Conceição
- Center for Technological Development, Postgraduate Program in Biotechnology, Federal University of Pelotas, Pelotas, Brazil
| | - F P Leivas Leite
- Center for Technological Development, Postgraduate Program in Biotechnology, Federal University of Pelotas, Pelotas, Brazil
| |
Collapse
|
6
|
Immunogenicity of Clostridium perfringens epsilon toxin recombinant bacterin in rabbit and ruminants. Vaccine 2018; 36:7589-7592. [DOI: 10.1016/j.vaccine.2018.10.081] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 10/16/2018] [Accepted: 10/21/2018] [Indexed: 11/19/2022]
|
7
|
Siqueira FDF, Silva ROS, do Carmo AO, de Oliveira-Mendes BBR, Horta CCR, Lobato FCF, Kalapothakis E. Immunization with a nontoxic naturally occurring Clostridium perfringens alpha toxin induces neutralizing antibodies in rabbits. Anaerobe 2017; 49:48-52. [PMID: 29246841 DOI: 10.1016/j.anaerobe.2017.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 12/09/2017] [Accepted: 12/11/2017] [Indexed: 01/08/2023]
Abstract
Clostridium perfringens alpha toxin, encoded by plc gene, has been implicated in gas gangrene, a life threatening infection. Vaccination is considered one of the best solutions against Clostridium infections. Although studies have identified many low quality clostridial vaccines, the use of recombinant proteins has been considered a promising alternative. Previously, a naturally occurring alpha toxin isoform (αAV1b) was identified with a mutation at residue 11 (His/Tyr), which can affect its enzymatic activity. The aim of the present study was to evaluate whether the mutation in the αAV1b isoform could result in an inactive toxin and was able to induce protection against the native alpha toxin. We used recombinant protein techniques to determine whether this mutation in αAV1b could result in an inactive toxin compared to the active isoform, αZ23. Rabbits were immunized with the recombinant toxins (αAV1b and αZ23) and with native alpha toxin. αAV1b showed no enzymatic and hemolytic activities. ELISA titration assays showed a high titer of both anti-recombinant toxin (anti-rec-αAV1b and anti-rec-αZ23) antibodies against the native alpha toxin. The alpha antitoxin titer detected in the rabbits' serum pool was 24.0 IU/mL for both recombinant toxins. These results demonstrate that the inactive naturally mutated αAV1b is able to induce an immune response, and suggest it can be considered as a target for the development of a commercial vaccine against C. perfringens alpha toxin.
Collapse
Affiliation(s)
- Flávia de Faria Siqueira
- Instituto Federal de Minas Gerais, Campus Betim, Betim, 32656-840, Minas Gerais, Brazil; Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Minas Gerais, Brazil
| | - Rodrigo Otávio Silveira Silva
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Minas Gerais, Brazil
| | - Anderson Oliveira do Carmo
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Minas Gerais, Brazil
| | | | - Carolina Campolina Rebello Horta
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Minas Gerais, Brazil; Mestrado Profissional em Biotecnologia e Gestão da Inovação, Centro Universitário de Sete Lagoas, Sete Lagoas, 32701-242, Minas Gerais, Brazil
| | - Francisco Carlos Faria Lobato
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Minas Gerais, Brazil
| | - Evanguedes Kalapothakis
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Minas Gerais, Brazil.
| |
Collapse
|
8
|
Moreira GMSG, Salvarani FM, da Cunha CEP, Mendonça M, Moreira ÂN, Gonçalves LA, Pires PS, Lobato FCF, Conceição FR. Immunogenicity of a Trivalent Recombinant Vaccine Against Clostridium perfringens Alpha, Beta, and Epsilon Toxins in Farm Ruminants. Sci Rep 2016; 6:22816. [PMID: 27004612 PMCID: PMC4804304 DOI: 10.1038/srep22816] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 02/15/2016] [Indexed: 11/28/2022] Open
Abstract
Clostridium perfringens is an anaerobic bacterium that produces several toxins. Of these, the alpha, beta, and epsilon toxins are responsible for causing the most severe C. perfringens-related diseases in farm animals. The best way to control these diseases is through vaccination. However, commercially available vaccines are based on inactivated toxins and have many production drawbacks, which can be overcome through the use of recombinant antigens. In this study, we produced recombinant alpha, beta, and epsilon toxins in Escherichia coli to formulate a trivalent vaccine. Its effectiveness was evaluated through a potency test in rabbits, in which the vaccine generated 9.6, 24.4, and 25.0 IU/mL of neutralizing antibodies against the respective toxins. Following this, cattle, sheep, and goats received the same formulation, generating, respectively, 5.19 ± 0.48, 4.34 ± 0.43, and 4.70 ± 0.58 IU/mL against alpha toxin, 13.71 ± 1.17 IU/mL (for all three species) against beta toxin, and 12.74 ± 1.70, 7.66 ± 1.69, and 8.91 ± 2.14 IU/mL against epsilon toxin. These levels were above the minimum recommended by international protocols. As such, our vaccine was effective in generating protective antibodies and, thus, may represent an interesting alternative for the prevention of C. perfringens-related intoxications in farm animals.
Collapse
Affiliation(s)
| | - Felipe Masiero Salvarani
- Instituto de Medicina Veterinária, Universidade Federal do Pará, Castanhal, Pará, CEP 68740-970, Brazil
| | - Carlos Eduardo Pouey da Cunha
- Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, CEP 96160-000, Brazil
| | - Marcelo Mendonça
- Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, CEP 96160-000, Brazil
| | - Ângela Nunes Moreira
- Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, CEP 96010-610, Brazil
| | - Luciana Aramuni Gonçalves
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, CEP 30123-970, Brazil
| | - Prhiscylla Sadanã Pires
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, CEP 30123-970, Brazil
| | | | - Fabricio Rochedo Conceição
- Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, CEP 96160-000, Brazil
| |
Collapse
|
9
|
Rumah KR, Ma Y, Linden JR, Oo ML, Anrather J, Schaeren-Wiemers N, Alonso MA, Fischetti VA, McClain MS, Vartanian T. The Myelin and Lymphocyte Protein MAL Is Required for Binding and Activity of Clostridium perfringens ε-Toxin. PLoS Pathog 2015; 11:e1004896. [PMID: 25993478 PMCID: PMC4439126 DOI: 10.1371/journal.ppat.1004896] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 04/19/2015] [Indexed: 12/18/2022] Open
Abstract
Clostridium perfringens ε-toxin (ETX) is a potent pore-forming toxin responsible for a central nervous system (CNS) disease in ruminant animals with characteristics of blood-brain barrier (BBB) dysfunction and white matter injury. ETX has been proposed as a potential causative agent for Multiple Sclerosis (MS), a human disease that begins with BBB breakdown and injury to myelin forming cells of the CNS. The receptor for ETX is unknown. Here we show that both binding of ETX to mammalian cells and cytotoxicity requires the tetraspan proteolipid Myelin and Lymphocyte protein (MAL). While native Chinese Hamster Ovary (CHO) cells are resistant to ETX, exogenous expression of MAL in CHO cells confers both ETX binding and susceptibility to ETX-mediated cell death. Cells expressing rat MAL are ~100 times more sensitive to ETX than cells expressing similar levels of human MAL. Insertion of the FLAG sequence into the second extracellular loop of MAL abolishes ETX binding and cytotoxicity. ETX is known to bind specifically and with high affinity to intestinal epithelium, renal tubules, brain endothelial cells and myelin. We identify specific binding of ETX to these structures and additionally show binding to retinal microvasculature and the squamous epithelial cells of the sclera in wild-type mice. In contrast, there is a complete absence of ETX binding to tissues from MAL knockout (MAL-/-) mice. Furthermore, MAL-/- mice exhibit complete resistance to ETX at doses in excess of 1000 times the symptomatic dose for wild-type mice. We conclude that MAL is required for both ETX binding and cytotoxicity.
Collapse
Affiliation(s)
- Kareem Rashid Rumah
- Brain and Mind Research Institute, Weill Cornell Medical College, New York City, New York, United States of America
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York City, New York, United States of America
| | - Yinghua Ma
- Brain and Mind Research Institute, Weill Cornell Medical College, New York City, New York, United States of America
| | - Jennifer R. Linden
- Brain and Mind Research Institute, Weill Cornell Medical College, New York City, New York, United States of America
| | - Myat Lin Oo
- Brain and Mind Research Institute, Weill Cornell Medical College, New York City, New York, United States of America
| | - Josef Anrather
- Brain and Mind Research Institute, Weill Cornell Medical College, New York City, New York, United States of America
| | - Nicole Schaeren-Wiemers
- Neurobiology, Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Miguel A. Alonso
- Centro de Biología Molecular Severo Ochoa, CSIC-UAM, Cantoblanco, Madrid, Spain
| | - Vincent A. Fischetti
- Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York City, New York, United States of America
| | - Mark S. McClain
- Department of Medicine, Division of Infectious Diseases, Vanderbilt University School of Medicine, Nashville, Tennessee, United States of America
| | - Timothy Vartanian
- Brain and Mind Research Institute, Weill Cornell Medical College, New York City, New York, United States of America
- * E-mail:
| |
Collapse
|
10
|
Vaccination with recombinant Clostridium perfringens toxoids α and β promotes elevated antepartum and passive humoral immunity in swine. Vaccine 2013; 31:4152-5. [DOI: 10.1016/j.vaccine.2013.06.094] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 05/20/2013] [Accepted: 06/25/2013] [Indexed: 11/30/2022]
|
11
|
Lima C, Lobato Z, Pires PS, Silva R, Salvarani F, Assis R, Lobato F. Padronização de teste de Potência in vitro Para vacinas que contenham toxoide alfa de Clostridium novyi tipo B. ARQUIVOS DO INSTITUTO BIOLÓGICO 2011. [DOI: 10.1590/1808-1657v78p5072011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO Clostridium novyi tipo B é o patógeno responsável pela hepatite necrótica, causada pela ação da toxina alfa. O controle desta enfermidade é baseado na imunização dos animais com vacinas que contenham na sua composição toxóide alfa de C. novyi tipo B. O teste de potência deste imunógeno é realizado a partir de soros de coelhos imunizados, por meio da técnica de soroneutralização em camundongos. Portanto objetivou-se padronizar um teste de potência de toxóide alfa de C. novyi tipo B em linhagem de célula VERO, como método alternativo ao bioensaio animal. O coeficiente de correlação obtido pelas técnicas in vitro e in vivo foi de 98,38%, indicando ser possível a utilização do modelo estudado na substituição do modelo animal para teste de potência de toxoide alfa de C. novyi tipo B.
Collapse
Affiliation(s)
| | | | - PS. Pires
- Universidade Federal de Minas Gerais, Brasil
| | - R.O.S Silva
- Universidade Federal de Minas Gerais, Brasil
| | | | - R.A. Assis
- Laboratório Nacional Agropecuário de Minas Gerais, Brasil
| | | |
Collapse
|
12
|
Lobato FC, Lima CG, Assis RA, Pires PS, Silva RO, Salvarani FM, Carmo AO, Contigli C, Kalapothakis E. Potency against enterotoxemia of a recombinant Clostridium perfringens type D epsilon toxoid in ruminants. Vaccine 2010; 28:6125-7. [DOI: 10.1016/j.vaccine.2010.07.046] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Revised: 07/14/2010] [Accepted: 07/14/2010] [Indexed: 10/19/2022]
|