The molecular pathways underlying host resistance and tolerance to pathogens
1The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh Edinburgh, UK.
Frontiers in Genetics
|February 14, 2013
Summary
Breeding livestock for disease resistance and tolerance is crucial. Understanding the genetic basis of these complex traits will improve animal health and welfare globally.
Area of Science:
- Animal genetics
- Immunology
- Livestock science
Background:
- Global demand for livestock resistant to endemic and exotic pathogens is high.
- Host-pathogen interactions involve complex defense systems with genetic variation influencing resistance and tolerance.
- Distinct or intertwined genes and pathways govern resistance (pathogen control) and tolerance (reducing host damage).
Purpose of the Study:
- To explore the genetic underpinnings of resistance and tolerance in livestock.
- To differentiate the molecular mechanisms of resistance and tolerance to pathogens.
- To identify candidate genes and pathways for improving livestock disease resilience.
Main Methods:
- Review of existing literature on host-pathogen interactions and genetic variation.
- Analysis of molecular pathways involved in innate immunity, inflammation, and tissue repair.
- Identification of potential genetic loci associated with resistance and tolerance phenotypes.
Main Results:
- Resistance mechanisms involve mucosal and innate immune systems, including pattern recognition receptors (PRRs) for pathogen clearance.
- Tolerance mechanisms focus on reducing immunopathology and protecting against pathogen toxins, involving regulatory pathways and tissue repair.
- Specific genetic loci for resistance and tolerance in livestock remain largely undetermined.
Conclusions:
- Understanding the distinct genetic and molecular mechanisms of resistance and tolerance is key to improving livestock health.
- Identifying candidate genes and pathways can guide breeding strategies for enhanced disease resilience.
- Further research is needed to pinpoint genetic loci for resistance and tolerance in livestock species.
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