Linked Life Data

3347051

Source:http://linkedlifedata.com/resource/pubmed/id/3347051

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1988-4-11
pubmed:abstractText
The activity of steroid 21-sulfatase, the enzyme that catalyzes the hydrolysis of deoxycorticosterone sulfate (DOC-SO4) is demonstrable in human placenta. Thus, it is possible that this placental enzyme, by way of the hydrolysis of either DOC-SO4 or 21-hydroxypregnenolone mono- or di-sulfate of fetal origin, may be important in the biosynthesis of DOC, which is present in the plasma of pregnant women in high concentration. To investigate this issue further, we evaluated steroid 21-sulfatase activity in microsomal preparations of a sulfatase-deficient placenta. Immediately after delivery, at term, of a living male fetus with sulfatase deficiency, a microsome-enriched fraction of placental tissue was prepared; sulfatase activity was evaluated by use of three substrates, viz. dehydroisoandrosterone sulfate (DS), estrone sulfate (E1-SO4), and DOC-SO4, in various concentrations. Similar incubations were conducted with aliquots of a microsome-enriched fraction prepared from placental tissue of a normal fetus that was delivered, at term, within minutes of the time of delivery of the infant with sulfatase deficiency. In microsomal fractions from the normal placenta, each of the steroid sulfates was hydrolyzed. In the absence of microsomes, and in the presence of microsomal fractions from the sulfatase-deficient placenta, the hydrolysis of DOC-SO4 and DS was not detected. Moreover, in microsomes prepared from the sulfatase-deficient placenta, E1-SO4 was hydrolyzed at a rate that was only 10% of that in incubations with microsomal preparations of the normal placenta. We conclude that with sulfatase deficiency, the placenta is deficient not only in sulfatase activity for steroid-3-sulfates but for steroid 21-sulfates, e.g. DOC-SO4, as well.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0022-4731
pubmed:author
pubmed:issnType
Print
pubmed:volume
29
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
57-62
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Origin of deoxycorticosterone and deoxycorticosterone sulfate in human pregnancy: absence of steroid 21-sulfatase activity in sulfatase-deficient placenta.
pubmed:affiliation
Cecil H. and Ida Green Center for Reproductive Biology Sciences, University of Texas Southwestern Medical School, Dallas 75235.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Case Reports