Linked Life Data

9612271

Source:http://linkedlifedata.com/resource/pubmed/id/9612271

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5 Pt 1
pubmed:dateCreated
1998-7-1
pubmed:abstractText
Hepatocytes and Kupffer cells in primary culture both secrete plasma-type platelet-activating factor-acetylhydrolase (pPAF-AH) into serum-free culture medium. The rate of secretion of pPAF-AH by Kupffer cells was 20 to 25 times higher than from hepatocytes, and Kupffer cells expressed a higher level of pPAF-AH mRNA than did hepatocytes. Purified liver cell-secreted pPAF-AH exhibited a major protein band of 65-67 kDa on SDS-PAGE; this was the band predominantly labeled when the enzyme catalytic center was reacted with [3H]diisopropylfluorophosphate ([3H]DFP). Rat bile collected from cannulated bile ducts contained significant PAF-AH activity, and bile samples possessed a prominent band at 30-32 kDa, which was the exclusive target for [3H]DFP. Experiments using tunicamycin, an inhibitor of N-linked glycosylation, and endoglycosidase H suggested that pPAF-AH secreted constitutively by cultured hepatocytes and Kupffer cells is glycosylated. The present study supports the notion that hepatic secretion of pPAF-AH into the blood contributes to the regulation of PAF and oxidized phospholipid levels in the circulation, whereas secretion of PAF-AH into the bile may allow hepatic control of these phospholipid signaling molecules in the gastrointestinal tract.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0002-9513
pubmed:author
pubmed:issnType
Print
pubmed:volume
274
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
G891-900
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Secretory PAF-acetylhydrolase of the rat hepatobiliary system: characterization and partial purification.
pubmed:affiliation
Department of Biochemistry, University of Texas Health Science Center at San Antonio 78284-7760, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.