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Animal models for experimental tuberculosis
D Smith1, E Wiegeshaus, V Balasubramanian
1Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, USA. dwsmith2@facstaff.wisc.edu
Summary
Animal models for tuberculosis vaccine assays show variability, leading to disagreements on vaccine potency. Focusing on models that mimic human tuberculosis is recommended for effective vaccine development.
Area of Science:
- Immunology
- Vaccinology
- Microbiology
Background:
- Animal models are crucial for tuberculosis vaccine development and efficacy testing.
- Existing animal models for tuberculosis vaccine assays have led to inconsistent potency rankings.
- Discrepancies in vaccine efficacy findings are attributed to variations in test systems and model variables.
Purpose of the Study:
- To address the challenges and inconsistencies in current animal models used for tuberculosis vaccine potency assays.
- To recommend improvements in animal model selection for more reliable tuberculosis vaccine evaluation.
- To guide the development of new tuberculosis vaccines using advanced technologies.
Main Methods:
- A survey and analysis of existing animal models for tuberculosis vaccine potency assays.
- Evaluation of how different test system variables influence vaccine potency ranking.
- Review of sequential experiments used to optimize vaccine activity in animal models.
Main Results:
- Significant disagreement exists among studies using different animal models regarding the potency ranking of antituberculosis vaccines.
- Specific test-system variables within animal models can be manipulated to demonstrate superior potency for any given vaccine product.
- Current animal models do not consistently reflect the natural history of human tuberculosis.
Conclusions:
- There is a critical need to focus on animal models that accurately replicate the key aspects of human tuberculosis natural history.
- Developing new tuberculosis vaccines requires animal models capable of assaying protective potency, ideally inhibiting infection at the point of entry.
- Efficient development of novel tuberculosis vaccines necessitates collaborative efforts between vaccine production labs and animal model research labs.