Abstract:
:Congenital diaphragmatic hernia (CDH) is accompanied by pulmonary hypoplasia and pulmonary hypertension. Fetal lung growth is dependent on the secretion of lung liquid, which normally is absorbed at partus. The ion channel NKCC-1 is involved in this secretory process, but has recently also been reported to be implicated in absorption. CDH patients show a disturbed transition from secretion to absorption. alpha- and beta-ENaC are essential for lung liquid absorption. Common for all transcellular ion transport is the need for Na/K-ATPase as a primary driving force. The aim of the study was first to map the normal pulmonary expression of the above proteins during late gestation and secondly to see if the expression was affected in a CDH rat model. Pregnant Sprague-Dawley rat dams were given nitrofen on gestational day 9.5 to induce CDH. The fetuses were removed on gestational days E18 and E21. In addition, newborn rats were harvested postpartum on day P2. The fetuses were put into one of two groups: hypoplastic lungs without CDH (N-CDH) and hypoplastic lungs with CDH (N+CDH). The pulmonary expression of NKCC-1, alpha-/beta-ENaC and Na/K-ATPase was then analyzed using Western blot. We found that the protein levels of NKCC-1 on gestational days E18 and E21 were significantly lower among fetuses with N+CDH as well as N-CDH compared to controls. The expression of beta-ENaC was also significantly down-regulated in both the groups on E18 and E21. The protein levels of alpha-ENaC and Na/K-ATPase were not found to be significantly decreased, but both showed a tendency towards down-regulation. The marked down-regulation of NKCC-1 in fetal hypoplastic lungs with CDH indicates a possibly decreased lung liquid production. This may be one of the mechanisms behind the disturbed pulmonary development in CDH. We also show that beta-ENaC is down-regulated. Down-regulation of beta-ENaC may result in abnormal lung liquid absorption, which could be one of the mechanisms behind the respiratory distress seen in CDH patients postpartum.
journal_name
Pediatr Surg Intjournal_title
Pediatric surgery internationalauthors
Ringman A,Zelenina M,Eklöf AC,Aperia A,Frenckner Bdoi
10.1007/s00383-008-2209-6subject
Has Abstractpub_date
2008-09-01 00:00:00pages
993-1000issue
9eissn
0179-0358issn
1437-9813journal_volume
24pub_type
杂志文章abstract::Pediatric germ cell tumors comprise 1-3% of all malignant pediatric tumors and are found in variable locations. We present the case of a term 3.7 kg neonate who was found to have a giant liver mass at birth, later determined to be an immature teratoma arising from the hepatoduodenal ligament. This case report and imag...
journal_title:Pediatric surgery international
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journal_title:Pediatric surgery international
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journal_title:Pediatric surgery international
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pub_type: 杂志文章,meta分析,评审
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journal_title:Pediatric surgery international
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更新日期:2014-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:1996-04-01 00:00:00
abstract:PURPOSE:The need for clinically applicable skin substitutes continues to be a matter of fact. Hypothetically, a laboratory grown autologous skin analog with near normal architecture might be a suitable approach to yield both satisfactory functional and cosmetic long-term results. In this study, we explored the use of h...
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abstract:PURPOSE:Bone morphogenetic proteins (BMPs) are a group of growth factors that are implicated in intestinal growth, morphogenesis, differentiation, and homeostasis. The role of the BMP signaling cascade in stimulation of cell proliferation after massive small bowel resection is unknown. The purpose of this study was to ...
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doi:10.1007/s00383-015-3829-2
更新日期:2016-02-01 00:00:00
abstract::Colostomy shift en masse is a novel technique in which the colostomy is shifted along with a rim of skin and abdominal wall tissue. This provides additional length of distal bowel if needed during pull-through anastomosis. We have treated three cases (two Hirschsprung's disease and one anorectal malformation) with col...
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doi:10.1007/s00383-007-1981-z
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更新日期:2005-09-01 00:00:00
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更新日期:2012-03-01 00:00:00
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abstract::Fetal skin wounds heal scarlessly while adult wounds scar. Fetal wound healing occurs in a physiologically hypoxic environment whereas in adult wound healing, cells have to acutely adapt to hypoxia caused by locally impaired blood supply. We examined the expression of hypoxia-inducible factor 1 (HIF-1), a potent trans...
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