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The development of the mucosal immune system pre- and post-weaning: balancing regulatory and effector function
M Bailey1, K Haverson, C Inman
1School of Clinical Veterinary Science, University of Bristol, Langford, UK. mick.bailey@bristol.ac.uk
The Proceedings of the Nutrition Society
|November 30, 2005
Summary
The mucosal immune system distinguishes between pathogens and harmless antigens. Critical periods like birth and weaning require balanced immune responses to prevent allergies or susceptibility to disease.
Area of Science:
- Immunology
- Gastroenterology
- Pediatrics
Background:
- The mucosal immune system protects against pathogens but must also tolerate harmless antigens.
- Neonates face significant antigen exposure at birth and weaning, periods of rapid dietary and microbial change.
- Abrupt weaning practices increase the challenge for immature mucosal immune systems.
Purpose of the Study:
- To explore the development and regulation of the mucosal immune system in neonates.
- To identify critical control points in immune development during early life.
- To understand the basis of immune-related disorders like allergy and disease susceptibility.
Main Methods:
- Review of existing literature on mucosal immunity and neonatal development.
- Analysis of immune responses to dietary and microbial antigens during critical life stages.
- Conceptual framework for understanding immune system maturation and regulation.
Main Results:
- Neonates possess developing mucosal immune systems at birth, with maturation influenced by gut microbiota colonization.
- Active immune responses and tolerance mechanisms develop concurrently.
- Inappropriate development can lead to allergies or increased susceptibility to infections.
Conclusions:
- Birth and weaning are critical windows for establishing appropriate immune responses and tolerance.
- Balanced development of effector and regulatory immune functions is essential for health.
- Disruptions in this process can have long-term health consequences, including allergies and disease.
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