Linked Life Data

8951682

Source:http://linkedlifedata.com/resource/pubmed/id/8951682

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1997-2-20
pubmed:abstractText
The iris-ciliary body (ICB) is a site of action for topically applied antiglaucoma drugs. Moreover, adenosine has been implicated as a modulator of aqueous humor dynamics. The present study compares the binding of the nucleoside transporter probe, [3H]nitrobenzylthioinosine ([3H]NBMPR), to homogenates prepared from rabbit ICB and a cultured rabbit nonpigmented ciliary epithelial cell line (NPE) to determine whether NPE can be used as an experimental model to study the nucleoside transporter. Linear transformation of the saturation binding data revealed that [3H]NBMPR binds to a homogeneous population of binding sites with similar binding affinities (Kd = 0.3 +/- 0.1 and 0.6 +/- 0.1 nM in NPE and ICB, respectively). However, the maximal binding capacity in NPE (Bmax = 288 +/- 54 fmol/mg protein) was significantly higher than that in ICB (Bmax = 154 +/- 17 fmol/mg protein). Selected inhibitors of the nucleoside transport system and structural analogs of adenosine inhibited the binding in both homogenate preparations with a similar rank order of potency: NBMPR > DPY > CV-1808 > CHA > R-PIA > S-PIA > 2-CADO > NECA. The results suggest that NPE is a useful model which could be used for characterizing the nucleoside transporter in ICB and for the screening of nucleoside transport inhibitors as potential antiglaucoma drugs.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1080-7683
pubmed:author
pubmed:issnType
Print
pubmed:volume
12
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
461-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Comparison of nucleoside transport binding sites in rabbit iris-ciliary body and cultured rabbit nonpigmented ciliary epithelial cells.
pubmed:affiliation
Department of Pharmacology and Toxicology, Morehouse School of Medicine, Atlanta, Georgia, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't