Linked Life Data

8449026

Source:http://linkedlifedata.com/resource/pubmed/id/8449026

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1993-4-15
pubmed:abstractText
Specific and high affinity binding of the potent muscarinic cholinergic antagonist, [3H]quinuclidinylbenzilate ([3H]QNB) was observed using intact native and cultured adult human corneal endothelium (HCE). Specific binding was proportional to radioligand concentration between 0.03 and 5 nM, indicating a maximal binding capacity (Bmax) of 130 fmol of [3H]QNB/mg protein and a dissociation constant (Kd) of 0.3 nM. Atropine competed effectively with [3H]QNB for binding sites; requiring 3 nM to inhibit 50% of the binding of 1 nM [3H]QNB. Carbachol also competed with [3H]QNB at higher concentrations, but nicotine did not affect [3H]QNB binding at levels up to 1 nM. [3H]QNB binding was also observed in cultured cells of adult human, rabbit, and bovine corneal endothelium. Native and cultured HCE were affinity labelled using tritium-labelled propylbenzilylcholine mustard (PBCM). Separation of the proteins in affinity labelled native and cultured tissue by SDS-polyacrylamide gel electrophoresis (SDS-PAGE) showed that only one protein in each preparation, of 60 and 55 kilodaltons (kDa), respectively, was specifically radiolabelled. These data indicate that the corneal endothelium of human and several animal species exhibit muscarinic cholinoceptors.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0271-3683
pubmed:author
pubmed:issnType
Print
pubmed:volume
12
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
155-62
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Muscarinic cholinoceptors in native and cultured human corneal endothelium.
pubmed:affiliation
Missouri Lions Eye Research Foundation, Columbia.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.