Linked Life Data

12682826

Source:http://linkedlifedata.com/resource/pubmed/id/12682826

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2003-4-8
pubmed:abstractText
Placental Na(+)/H(+) exchanger (NHE-1), which plays an important role in maintaining fetal and maternal Na+ and H+ homeostasis, is uniquely regulated. However, the role of this protein in type-2 diabetic placentas, and the molecular basis for its unique regulation in normal placenta remain poorly understood. To address these issues, a C-terminus regulatory domain of NHE-1 was cloned and sequenced from normal human placentas, and was used to prepare a GST-fusion protein for raising polyclonal antibodies. For this study, age-matched type 2 diabetic (n=8) and normal (n=8) pregnant women were recruited to investigate the effects of controlled hyperglycemia on the expression of placental NHE-1 at term delivery. The C-terminal sequence in the normal human placental isoform was identical to that reported for other tissues. The antibodies reacted selectively with a 110 kD protein. The level of NHE-1 protein was decreased significantly ( p<0.05) in diabetic placentas, whereas beta-actin, an internal control, remained unaltered. Yield of placental crude microsomes was significantly higher from diabetic placentas. Interestingly, the levels of NHE-1 mRNA and beta-actin mRNA did not change in diabetic pregnancies. Blood pressure values of the mothers in both groups were also normal. The placental mass and weight of babies were slightly increased, whereas the gestational age was lower in diabetic pregnancies. These results suggest that the unique regulation of placental NHE-1 is not due to differences in its C-terminus structure. Lack of a significant correlation between the suppression of NHE-1 and gestational age, placental mass or birth weight in the diabetic pregnancies suggests that suppression is independent of these parameters, and is regulated post-transcriptionally. This change in NHE-1 may contribute to an adequate provision of electrolytes and nutrients to the fetus.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0940-5429
pubmed:author
pubmed:issnType
Print
pubmed:volume
40
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
28-36
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Suppression of Na+-H+ exchanger-1 in placentas of type 2 diabetic pregnant women: possible functional implication.
pubmed:affiliation
Department of Biochemistry, Faculty of Medicine, Kuwait University, P.O. Box 24923, Kuwait.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't