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A Preterm Rat Model for Immunonutritional Studies

Blanca Grases-Pintó1,2, Paulina Torres-Castro3,4, Mar Abril-Gil5,6

  • 1Physiology Section, Department of Biochemistry and Physiology, Faculty of Pharmacy and Food Science, University of Barcelona, 08028 Barcelona, Spain. blancagrases@ub.edu.

Nutrients
|May 5, 2019
PubMed

Insights

This study establishes a preterm rat model to assess immune system development. Preterm neonates exhibit distinct immune cell profiles and reduced immunoglobulin levels, offering a tool for studying nutritional impacts on immunity.

Area of Science:

  • Immunology
  • Neonatal Development
  • Animal Models

Background:

  • Neonates possess immature immune systems, particularly preterm infants.
  • Understanding immune maturation is crucial for neonatal health interventions.
  • Dietary interventions may promote immune development in vulnerable neonates.

Purpose of the Study:

  • Establish a preterm rat model to study immune system maturation.
  • Identify biomarkers of innate and adaptive immunity in preterm neonates.
  • Provide a tool for evaluating immunonutritional strategies.

Main Methods:

  • Created a preterm rat model.
  • Measured in vivo intestinal permeability and performed histomorphometry.
  • Assessed blood cell counts, leukocyte phagocytic activity, and plasma immunoglobulin levels.

Main Results:

  • Preterm rats had lower erythrocytes and platelets, but higher leukocytes than term rats.
  • Monocyte phagocytic activity was reduced in preterm rats; granulocyte activity was unchanged.
  • Preterm rats showed lower plasma IgG and IgM, but normal IgA levels.
  • Intestinal permeability was lower in preterm rats with reduced goblet cell size.

Conclusions:

  • The developed preterm rat model effectively displays differential immune biomarkers.
  • This model is suitable for immunonutritional studies targeting neonatal immune development.
  • Findings highlight specific immune system deficits in preterm neonates.

Keywords:
adaptive immunityinnate immunityintestinal permeabilityphagocytosisplasmatic immunoglobulinprematuritysuckling rat

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