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Prenatal vitamin E improves lung and heart hypoplasia in experimental diaphragmatic [correction of diaphragamatic] hernia.

Abstract：

:Nitrofen induces in rats diaphragmatic hernia (CDH) with heart and lung hypoplasia by a mechanism involving oxidation. The aim of this study was to examine if prenatal administration of the anti-oxidant agent vitamin E (VitE) prevents to some extent heart and lung hypoplasia. Pregnant rats received on E9.5 either 100 mg of nitrofen alone or followed by 150 IU of VitE on E16.5-E20.5. Control animals received either vehicle or VitE alone. The fetuses were recovered on E21. The hearts and lungs were weighed and DNA and proteins were measured. Sections of the heart and lung were immunohistochemically stained for ki-67, Tunel and TTF-1, and the proportions of proliferating, apoptotic and TTF-1-expressing cells were determined. Cultured human pneumocytes were exposed to the same agents and similarly processed. TTF-1 expression and the proportion of proliferating cells were quantitated. The ANOVA or Kruskall-Wallis tests were used for comparison with p<0.05 as threshold of significance. Nitrofen-exposed rats had decreased lung and heart weight/body weight ratios, lung and heart DNA and protein, lung TTF-1 expression and proportion of proliferating cells in lung and heart. Additional treatment with VitE ameliorated these decreases except for lung TTF-1 and heart weight. In cultured pneumocytes, TTF-1 expression was decreased by nitrofen and rescued by VitE. Cell proliferation followed the same pattern. Antioxidant VitE partially reverses the effects of nitrofen on the heart and lungs of exposed rats. The same effects are observed in cultured human pneumocytes. These results further substantiate the oxidative nature of the effects of nitrofen and suggest that anti-oxidant agents could have a potential clinical application.

journal_name

Pediatr Surg Int

journal_title

Pediatric surgery international

authors

Gonzalez-Reyes S,Alvarez L,Diez-Pardo JA,Tovar JA

doi

10.1007/s00383-003-1005-6

subject

Has Abstract

pub_date

2003-07-01 00:00:00

pages

331-4

issue

5

eissn

0179-0358

issn

1437-9813

journal_volume

19

pub_type

杂志文章

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