Bronchopulmonary innervation defects in infants and rats with congenital diaphragmatic hernia

Federica Pederiva, Rosa Aras Lopez, Jose I. Rodriguez, Leopoldo Martinez, Juan A. Tovar

Research output: Contribution to journalArticle

Abstract

Introduction: Pulmonary morbidity in survivors of congenital diaphragmatic hernia (CDH) is caused by hypoplasia, barotraumas, or other reasons. We have previously shown deficient tracheal innervation in rats with CDH. Now we examine whether bronchopulmonary innervation is also abnormal in both infants and rats with CDH. Material and Methods: Sections of E15, E18, and E21 rat lungs were immunostained for Protein gene product 9.5 and S100 antibodies. Similar immunostaining was performed on tissue from infants dying from CDH (n = 6) and other causes (n = 6) with Neurofilament, S100, and Rearranged during transfection antibodies. Nerve trunks/bronchus were counted, and the proportion of glial and RET-positive cells/bronchial surface was calculated. Glial cell-line derived neurotrophic factor protein and mRNA were measured in rat lungs. Results: Nerve trunks/bronchus were decreased in infants and rat fetuses with CDH. In contrast, glial and RET-positive cells/bronchial surface were increased in infants and rats with CDH. Both lungs were equally affected. GDNF protein was high, whereas GDNF mRNA was decreased in preterm animals with CDH. Conclusions: The lungs of infants and rats with CDH have decreased neural components compensated by increased supporting glial cells and persistence high expression of RET and GDNF protein. Because bronchopulmonary innervation controls airway smooth muscle, vessels, and glandular secretions, it is tempting to hypothesize that these deficiencies might play a role in respiratory morbidity in CDH.

Original languageEnglish
Pages (from-to)360-365
Number of pages6
JournalJournal of Pediatric Surgery
Volume45
Issue number2
DOIs
Publication statusPublished - Feb 2010

Keywords

  • Diaphragmatic hernia
  • Intrinsic innervation
  • Lung
  • Neural crest
  • Nitrofen

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Surgery

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