Linked Life Data

3755620

Source:http://linkedlifedata.com/resource/pubmed/id/3755620

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1986-10-10
pubmed:abstractText
Sex differences in amniotic fluid and lung lavage surfactant have been found. Although these studies suggest that augmented fetal surfactant synthesis occurs earlier in the female fetus, there is little direct evidence for a sex difference in fetal surfactant synthesis. We studied the synthesis of surfactant by evaluating the appearance of labelled phospholipids in lamellar bodies recovered from sex-specific organ culture of fetal rabbit lungs. Furthermore, we studied the ability of dexamethasone to stimulate surfactant synthesis in male and female fetal lungs. Organ culture was begun on day 21 of gestation. After 5 days the incorporation of [1,3-14C]glycerol into phosphatidylcholine (PC), disaturated phosphatidylcholine, phosphatidylinositol (PI), and phosphatidylglycerol was studied. Female lungs in organ culture synthesized more disaturated PC per milligram protein than male lungs. In the presence of dexamethasone (10(-8) M) and dihydrotestosterone (10(-8) M) an increased synthesis was noted in the female cultures of PC (270%), disaturated PC (234%), PI (281%), and phosphatidylglycerol (754%). No significant increase in the synthesis of PC or disaturated PC was observed in the male cultures. However in the male cultures smaller increases in the synthesis of PI (193%) and of phosphatidylglycerol (360%) were observed. Overall, dexamethasone stimulated synthesis in females but not in males such that significant differences in the synthesis of all phospholipids were found in the presence of 10(-8) M dexamethasone. These studies show that the synthesis of surfactant in the fetal lung is sexually dimorphic, as is the ability of dexamethasone to regulate synthesis. An understanding of the mechanism which causes these differences may provide important insight into the control of the developmental clock which regulates the orderly progression of development.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
4
pubmed:volume
883
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
373-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
The development of surfactant synthesis in fetal rabbit lung organ culture exhibits a sex dimorphism.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't