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A common origin for immunity and digestion.

Nichole A Broderick1

  • 1Department of Molecular, Cellular, and Developmental Biology, Yale University , New Haven, CT , USA.

Frontiers in Immunology
|March 7, 2015
PubMed
Summary
This summary is machine-generated.

The digestive and immune systems likely share a common evolutionary origin, evidenced by similar functions in nutrient acquisition and host defense. This perspective offers new insights into the evolution of defense mechanisms.

Keywords:
digestion physiologyevolutiongut microbiomehost-microbe interactionsinnate immunitymetabolism

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Area of Science:

  • Evolutionary biology
  • Immunology
  • Gastroenterology

Background:

  • The digestive and immune systems were historically considered distinct biological entities.
  • Recent observations reveal significant functional overlaps in nutrient absorption and pathogen defense.

Purpose of the Study:

  • To propose a unified origin for the digestive and immune systems.
  • To re-evaluate the evolution of host defense mechanisms through the lens of shared ancestry.

Main Methods:

  • Comparative analysis of molecular and cellular functions between digestive and immune systems.
  • Review of evolutionary developmental biology principles.
  • Hypothetical modeling of early host-organism evolution.

Main Results:

  • Identification of conserved pathways and cellular components in nutrient processing and immune surveillance.
  • Evidence supporting co-evolutionary trajectories for digestive and immune functions.
  • A novel framework for understanding the integrated development of these systems.

Conclusions:

  • The digestive and immune systems likely co-evolved from a common ancestral system.
  • This shared origin paradigm shifts our understanding of host defense evolution.
  • Future research should explore the genetic and molecular underpinnings of this proposed common ancestry.