Linked Life Data

1779311

Source:http://linkedlifedata.com/resource/pubmed/id/1779311

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1992-3-12
pubmed:abstractText
Vitamin A and its active metabolites are important factors in promoting normal respiratory epithelial differentiation and growth. Glucocorticoids, often used to treat chronic lung diseases in infancy and childhood, are known to increase serum retinol concentrations. To determine the effects of exogenous steroids on serum retinol and retinol-binding protein concentrations (as well as on liver and lung total vitamin A, retinol, and retinyl ester concentrations), 32 weanling Sprague-Dawley rats were divided into four equal experimental groups. Eight animals were vitamin A sufficient and received 7 days of intraperitoneal dexamethasone at 0.5 mg/kg/day (group SD), 8 were vitamin A sufficient and received placebo (group SP), 8 were made vitamin A deficient and subsequently received dexamethasone (group DD), and 8 were vitamin A deficient and received placebo (group DP). Dexamethasone increased serum retinol concentrations in the SD group (2.27 +/- 0.20 mumol/L) when compared with control (SP, 1.64 +/- 0.46 mumol/L, p less than 0.001) as well as with pretreatment baseline values (1.21 +/- 0.23 mumol/L, p less than 0.001). Lung total vitamin A, retinol, and individual retinyl esters were depleted by 56 +/- 19% in the SD group, whereas liver values were depleted by 36 +/- 23%. In the vitamin A-sufficient groups the relative percentages of four major retinyl esters (palmitate, stearate, oleate, and linoleate) did not change in either tissue after steroid exposure. The vitamin A-deficient groups had no detectable tissue vitamin A, and dexamethasone did not increase serum retinol concentrations in the DD group. Serum retinol-binding protein concentrations were significantly higher in both steroid-treated groups when compared with control.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0277-2116
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
376-82
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
The effect of glucocorticosteroids on serum, liver, and lung vitamin A and retinyl ester concentrations.
pubmed:affiliation
Department of Pediatrics, University of Minnesota School of Medicine, Minneapolis.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't