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In Vivo Models and In Vitro Assays for the Assessment of Pertussis Toxin Activity. Toxins (Basel) 2021; 13:toxins13080565. [PMID: 34437436 PMCID: PMC8402560 DOI: 10.3390/toxins13080565] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/04/2021] [Accepted: 08/05/2021] [Indexed: 01/07/2023] Open
Abstract
One of the main virulence factors produced by Bordetella pertussis is pertussis toxin (PTx) which, in its inactivated form, is the major component of all marketed acellular pertussis vaccines. PTx ADP ribosylates Gαi proteins, thereby affecting the inhibition of adenylate cyclases and resulting in the accumulation of cAMP. Apart from this classical model, PTx also activates some receptors and can affect various ADP ribosylation- and adenylate cyclase-independent signalling pathways. Due to its potent ADP-ribosylation properties, PTx has been used in many research areas. Initially the research primarily focussed on the in vivo effects of the toxin, including histamine sensitization, insulin secretion and leukocytosis. Nowadays, PTx is also used in toxicology research, cell signalling, research involving the blood–brain barrier, and testing of neutralizing antibodies. However, the most important area of use is testing of acellular pertussis vaccines for the presence of residual PTx. In vivo models and in vitro assays for PTx often reflect one of the toxin’s properties or details of its mechanism. Here, the established and novel in vivo and in vitro methods used to evaluate PTx are reviewed, their mechanisms, characteristics and limitations are described, and their application for regulatory and research purposes are considered.
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Wagner LD, Corvette LJ, Ngundi MM, Burns DL. Towards replacement of the acellular pertussis vaccine safety test: Comparison of in vitro cytotoxic activity and in vivo activity in mice. Vaccine 2017; 35:7160-7165. [DOI: 10.1016/j.vaccine.2017.10.082] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 10/10/2017] [Accepted: 10/27/2017] [Indexed: 10/18/2022]
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Report on the international workshop on alternatives to the murine histamine sensitization test (HIST) for acellular pertussis vaccines: state of the science and the path forward. Biologicals 2014; 42:114-22. [PMID: 24394373 DOI: 10.1016/j.biologicals.2013.11.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 11/06/2013] [Accepted: 11/29/2013] [Indexed: 11/20/2022] Open
Abstract
Regulatory authorities require safety and potency testing prior to the release of each production lot of acellular pertussis (aP)-containing vaccines. Currently, the murine histamine sensitization test (HIST) is used to evaluate the presence of residual pertussis toxin in aP containing vaccines. However, the testing requires the use of a significant number of mice and results in unrelieved pain and distress. NICEATM, ICCVAM, their partners in the International Cooperation on Alternative Test Methods, and the International Working Group for Alternatives to HIST organized a workshop to discuss recent developments in alternative assays to the HIST, review data from an international collaborative study on non-animal alternative tests that might replace the HIST, and address the path toward global acceptance of this type of method. Currently, there are three potential alternative methods to HIST. Participants agreed that no single in vitro method was sufficiently developed for harmonized validation studies at this time. It is unlikely that any single in vitro method would be applicable to all aP vaccines without modification, due to differences between vaccines. Workshop participants recommended further optimization of cell-based assays under development. Participants agreed that the next international collaborative studies should commence in 2013 based on discussions during this workshop.
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Kulpa-Eddy J, Srinivas G, Halder M, Hill R, Brown K, Roth J, Draayer H, Galvin J, Claassen I, Gifford G, Woodland R, Doelling V, Jones B, Stokes WS. Non-animal replacement methods for veterinary vaccine potency testing: state of the science and future directions. PROCEDIA IN VACCINOLOGY 2011; 5:60-83. [PMID: 32288914 PMCID: PMC7129755 DOI: 10.1016/j.provac.2011.10.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
NICEATM and ICCVAM convened an international workshop to review the state of the science of human and veterinary vaccine potency and safety testing methods and to identify opportunities to advance new and improved methods that can further reduce, refine, and replace animal use. Six topics were addressed in detail by speakers and workshop participants and are reported in a series of six reports. This workshop report, the second in the series, provides recommendations for current and future use of non-animal methods and strategies for veterinary vaccine potency testing. Workshop participants recommended that future efforts to replace animal use give priority to vaccines (1) that use large numbers of animals per test and for which many serials are produced annually, (2) that involve significant animal pain and distress during procedures, (3) for which the functional protective antigen has been identified, (4) that involve foreign animal/zoonotic organisms that are dangerous to humans, and (5) that involve pathogens that can be easily spread to wildlife populations. Vaccines identified as the highest priorities were those for rabies, Leptospira spp., Clostridium spp., Erysipelas, foreign animal diseases (FAD), poultry diseases, and fish diseases. Further research on the identification, purification, and characterization of vaccine protective antigens in veterinary vaccines was also identified as a priority. Workshop participants recommended priority research, development, and validation activities to address critical knowledge and data gaps, including opportunities to apply new science and technology. Recommendations included (1) investigations into the relative impact of various adjuvants on antigen quantification assays, (2) investigations into extraction methods that could be used for vaccines containing adjuvants that can interfere with antigen assays, and (3) review of the current status of rabies and tetanus human vaccine in vitro potency methods for their potential application to the corresponding veterinary vaccines. Workshop participants recommended enhanced international harmonization and cooperation and closer collaborations between human and veterinary researchers to expedite progress. Implementation of the workshop recommendations is expected to advance alternative in vitro methods for veterinary vaccine potency testing that will benefit animal welfare and replace animal use while ensuring continued protection of human and animal health.
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Affiliation(s)
- Jodie Kulpa-Eddy
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, Riverdale, Maryland, USA
| | - Geetha Srinivas
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Center for Veterinary Biologics, Ames, Iowa, USA
| | - Marlies Halder
- European Commission Joint Research Centre, Institute for Health and Consumer Protection, European Centre for the Validation of Alternative Methods, Ispra, Italy
| | - Richard Hill
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Center for Veterinary Biologics, Ames, Iowa, USA
| | - Karen Brown
- Pair O'Docs Enterprises, Parkville, Missouri, USA
| | - James Roth
- Center for Food Safety Security and Public Health, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | | | | | - Ivo Claassen
- Central Veterinary Institute, Lelystad, The Netherlands
| | - Glen Gifford
- Canadian Food Inspection Agency, Canadian Centre for Veterinary Biologics, Ottawa, Ontario, Canada
| | - Ralph Woodland
- Veterinary Medicines Directorate, Surrey, United Kingdom
| | - Vivian Doelling
- Integrated Laboratory Systems, Inc., Research Triangle Park, North Carolina, USA
| | - Brett Jones
- Integrated Laboratory Systems, Inc., Research Triangle Park, North Carolina, USA
| | - William S Stokes
- National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
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McFarland R, Verthelyi D, Casey W, Arciniega J, Isbrucker R, Schmitt M, Finn T, Descamps J, Horiuchi Y, Sesardic D, Stickings P, Johnson NW, Lipscomb E, Allen D. Non-animal replacement methods for human vaccine potency testing: state of the science and future directions. PROCEDIA IN VACCINOLOGY 2011; 5:16-32. [PMID: 32288913 PMCID: PMC7129268 DOI: 10.1016/j.provac.2011.10.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
NICEATM and ICCVAM convened an international workshop to review the state of the science of human and veterinary vaccine potency and safety testing methods, and to identify opportunities to advance new and improved methods that can further reduce, refine, and replace animal use. This report addresses methods and strategies identified by workshop participants for replacement of animals used for potency testing of human vaccines. Vaccines considered to have the highest priority for future efforts were (1) vaccines for which antigen quantification methods are already developed but not validated, (2) vaccines/components that require the largest number of animals, (3) vaccines that require an in vivo challenge test, and (4) vaccines with in vivo tests that are highly variable and cause a significant number of invalid tests. Vaccine potency tests identified as the highest priorities for replacement were those for diphtheria and tetanus, pertussis (whole cell and acellular), rabies, anthrax, polio vaccine (inactivated) and complex combination vaccines based on DT or DTwP/aP. Research into understanding the precise mechanism of protection afforded by vaccines and the identification of clinically relevant immunological markers are needed to facilitate the successful implementation of in vitro testing alternatives. This report also identifies several priority human vaccines and associated research objectives that are necessary to successfully implement in vitro vaccine potency testing alternatives.
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Affiliation(s)
- Richard McFarland
- United States Food and Drug Administration- Center for Biologics Evaluation and Research, Rockville, Maryland, USA
| | - Daniela Verthelyi
- United States Food and Drug Administration- Center for Drug Evaluation and Research, Silver Spring, Maryland, USA
| | - Warren Casey
- National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Juan Arciniega
- United States Food and Drug Administration- Center for Biologics Evaluation and Research, Rockville, Maryland, USA
| | - Richard Isbrucker
- Health Canada, Center for Vaccine Evaluation, Ottawa, Ontario, Canada
| | - Michael Schmitt
- United States Food and Drug Administration- Center for Biologics Evaluation and Research, Rockville, Maryland, USA
| | - Theresa Finn
- United States Food and Drug Administration- Center for Biologics Evaluation and Research, Rockville, Maryland, USA
| | | | | | - Dorothea Sesardic
- National Institute for Biological Standards and Control, Health Protection Agency, Hertfordshire, United Kingdom
| | - Paul Stickings
- National Institute for Biological Standards and Control, Health Protection Agency, Hertfordshire, United Kingdom
| | - Nelson W Johnson
- Integrated Laboratory Systems, Inc., Research Triangle Park, North Carolina, USA
| | - Elizabeth Lipscomb
- Integrated Laboratory Systems, Inc., Research Triangle Park, North Carolina, USA
| | - David Allen
- Integrated Laboratory Systems, Inc., Research Triangle Park, North Carolina, USA
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Alternative methods and strategies to reduce, refine, and replace animal use for human vaccine post-licensing safety testing: state of the science and future directions. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.provac.2011.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Stokes WS, Kulpa-Eddy J, McFarland R. The International Workshop on Alternative Methods to Reduce, Refine, and Replace the Use of Animals in Vaccine Potency and Safety Testing: introduction and summary. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.provac.2011.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Kulpa-Eddy J, Srinivas G, Halder M, Brown K, Draayer H, Galvin J, Claassen I, Gifford G, Woodland R, Doelling V, Jones B, Stokes WS. Alternative methods and strategies to reduce, refine, and replace animal use for veterinary vaccine post-licensing safety testing: state of the science and future directions. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.provac.2011.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Stokes WS, Brown K, Kulpa-Eddy J, Srinivas G, Halder M, Draayer H, Galvin J, Claassen I, Gifford G, Woodland R, Doelling V, Jones B. Improving animal welfare and reducing animal use for veterinary vaccine potency testing: state of the science and future directions. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.provac.2011.10.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Casey W, Schmitt M, McFarland R, Isbrucker R, Levis R, Arciniega J, Descamps J, Finn T, Hendriksen C, Horiuchi Y, Keller J, Kojima H, Sesardic D, Stickings P, Johnson NW, Lipscomb E, Allen D. Improving animal welfare and reducing animal use for human vaccine potency testing: state of the science and future directions. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.provac.2011.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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