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Related Experiment Video

Updated: Jul 20, 2025

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Postnatal growth restriction impairs rat lung structure and function.

James Zhao1, Craig Ballard1, Adrienne J Cohen1

  • 1Department of Pediatrics, University of Utah, Salt Lake City, Utah, USA.

Anatomical Record (Hoboken, N.J. : 2007)
|July 29, 2023
PubMed
Summary
This summary is machine-generated.

Postnatal growth restriction negatively impacts lung development and function. Nutritional deficits impair lung structure and mediators, with sex-specific changes observed in this rat model.

Keywords:
growth restrictionlung developmentlung diseasepreterm

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Area of Science:

  • Pulmonary Medicine
  • Developmental Biology
  • Nutritional Science

Background:

  • Nutritional deficits are known to negatively affect bronchopulmonary dysplasia development.
  • Mechanisms linking nutrition to lung outcomes and optimal nutritional strategies remain unclear.

Purpose of the Study:

  • To investigate the isolated effects of postnatal nutrition on lung structure and function.
  • To assess how postnatal growth restriction (PGR) impacts lung development, mediators, and fatty acid profiles in a rat model.

Main Methods:

  • Rats were cross-fostered to create control (litter size 8) and PGR (litter size 16) groups.
  • Lung structure, function, serum and lung tissue fatty acids, and molecular mediators were analyzed at postnatal day 21.

Main Results:

  • PGR led to thicker airspace walls, decreased lung compliance, and increased tissue damping in both sexes.
  • Male rats exhibited increased lung elastance, elastin protein, lysol oxidase, and elastic fiber deposition.
  • Female rats showed increased airway resistance and reduced docosahexaenoic acid levels in lung tissue.

Conclusions:

  • Postnatal growth restriction impairs lung structure and function in male and female rats.
  • Sex-specific alterations in lung molecular mediators of development were observed following PGR.