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The neuro-immunological interface in an evolutionary perspective: the dynamic relationship between effector and
E Ottaviani1, S Valensin, C Franceschi
1Department of Animal Biology, University of Modena via Berengario 14 41100 Modena, Italy. enzott@ unimo.it
Frontiers in Bioscience : a Journal and Virtual Library
|April 18, 1998
Summary
The immune-neuroendocrine system, present since invertebrates, evolved with new recognition units in vertebrates. This conserved system integrates innate immunity, stress, and inflammation for pathogen defense.
Area of Science:
- Evolutionary immunology
- Neuroendocrinology
- Innate and adaptive immunity
Background:
- An immune-neuroendocrine effector system integrating innate immunity, stress, and inflammation is conserved from invertebrates to vertebrates.
- This ancient defense network, centered on macrophages with promiscuous recognition, has been fundamental throughout evolution.
Purpose of the Study:
- To explore the evolutionary trajectory of the immune-neuroendocrine system.
- To explain the emergence of adaptive immunity in vertebrates as a response to increasing complexity.
Main Methods:
- Evolutionary perspective analysis
- Comparative immunology
- Analysis of molecular and genetic conservation
Main Results:
- Vertebrate adaptive immunity (T/B cells, MHC, antibodies) emerged with increased effector system complexity.
- The thymus arose as a novel organ to manage self/not-self discrimination challenges.
- Evolutionary 'bricolage' is evident at molecular, functional, and genetic levels.
Conclusions:
- The conserved immune-neuroendocrine system remains crucial for vertebrate defense.
- Adaptive immunity enhanced pathogen repertoire and self/not-self discrimination.
- Synergy between conserved and novel recognition systems optimizes immune efficiency.