Treatment of bowel in experimental gastroschisis with a nitric oxide donor

Frances L.L. Gonçalves, Márcia P. Bueno, Augusto F. Schmidt, Rebeca L. Figueira, Lourenço Sbragia

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Objective To reduce the harmful effect of bowel exposure to amniotic fluid in gastroschisis, we used the nitric oxide (NO) donor S-nitrosoglutathione (GSNO) in an animal model of gastroschisis and assessed the ideal concentration for treatment of changes in bowel. Study Design Gastroschisis was surgically induced in rat fetuses on day 18.5 of gestation. The fetuses were divided into 5 groups (n = 12 animals/group): control (C), gastroschisis (G), gastroschisis + GSNO 5 μmol/L (GNO1), gastroschisis + GSNO 0.5 μmol/L (GNO2), and gastroschisis + GSNO 0.05 μmol/L (GNO3). On day 21.5 of gestation, fetuses were collected by cesarean delivery. Body and intestinal weight were measured and the bowels were either fixed for histometric and immunohistochemical study or frozen for Western blotting. We analyzed bowel morphometry on histological sections and expression of the NO synthase (NOS) enzymes by Western blotting and immunohistochemistry. Data were analyzed by analysis of variance or Kruskal-Wallis test when appropriate. Results Morphological and histometric measurements of weight, diameter, and thickness of the layers of the intestinal wall decreased with GSNO treatment, especially in the GNO3 group, when compared with the G group (P <.05). The expression of neuronal NOS, endothelial NOS, and inducible NOS decreased mainly in GNO3 group compared to the G group (P <.05), with no difference compared to C group (P >.05). Conclusion Fetal treatment with 0.05 μmol/L GSNO resulted in significant improvement of bowel morphology in gastroschisis.

Original languageEnglish (US)
Pages (from-to)383.e1-383.e7
JournalAmerican journal of obstetrics and gynecology
Volume212
Issue number3
DOIs
StatePublished - Mar 1 2015
Externally publishedYes

Keywords

  • experimental surgery
  • gastroschisis
  • nitric oxide
  • S-nitrosoglutathione

ASJC Scopus subject areas

  • Obstetrics and Gynecology

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