Linked Life Data

2093478

Source:http://linkedlifedata.com/resource/pubmed/id/2093478

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1991-6-24
pubmed:abstractText
It has been proposed that modulation of cholecystokinin (CCK) release by proteinases, proteinase inhibitors and protein is mediated by a pancreatic secretory trypsin inhibitor (PSTI), also called monitor peptide, in the rat. When human [125I]-PSTI was incubated with fasting small bowel juice or activated pancreatic juice greater than 88% of tracer eluted from gel chromatography in the characteristic position of hydrolysed PSTI. However, when the small bowel juice had been pre-incubated with soybean trypsin inhibitor 3 g/l, casein 5 g/l or lactalbumin 30 g/l, the hydrolysis of PSTI diminished so that 95%, 32%, and 33% respectively, now eluted in the characteristic position of free (i.e. intact and not bound to an enzyme) PSTI. When [125I]-PSTI was incubated with pure trypsin, chymotrypsin, elastase or enterokinase greater than 95% of tracer eluted in the position of PSTI-enzyme complex. Incubation of PSTI with trypsin plus one other enzyme was required to produce hydrolysis. The degree of protection of PSTI from hydrolysis in duodenal juice produced by these substances correlates with their affects on CCK release. Our findings support the hypothesis that PSTIs mediate the modulation of CCK release by intraluminal proteinases, proteinase inhibitors and proteins.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0009-8981
pubmed:author
pubmed:issnType
Print
pubmed:day
31
pubmed:volume
195
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
27-39
pubmed:dateRevised
2010-8-25
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Interactions of pancreatic secretory trypsin inhibitor in small intestinal juice: its hydrolysis and protection by intraluminal factors.
pubmed:affiliation
Department of Medicine, Royal Postgraduate Medical School, London, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't