rdf:type |
|
lifeskim:mentions |
|
pubmed:issue |
2
|
pubmed:dateCreated |
2001-2-22
|
pubmed:abstractText |
2-Aminoethoxydiphenyl borate (2APB) is a membrane-permeable blocker of the inositol 1,4,5-trisphosphate (IP3)-induced Ca2+ release in bi-directional Ca2+ -flux conditions. We have now studied the effects of 2APB on the 45Ca2+ uptake into, and on the basal and IP(3)-stimulated unidirectional 45Ca2+ efflux from the non-mitochondrial Ca2+ stores in permeabilized A7r5 smooth-muscle cells. 2APB inhibited the IP3 -induced Ca2+ release, with a half maximal inhibition at 36 microM 2APB, without affecting [3H]IP3 binding to the receptor. This inhibition did not depend on the IP3, ATP or free Ca2+ concentration. The Ca2+ pumps of the non-mitochondrial Ca2+ stores were half-maximally inhibited at 91microM 2APB. Higher concentrations of 2APB increased the non-specific leak of Ca2+ from the stores. We conclude that 2APB can not be considered as a selective blocker of the IP3 -induced Ca2+ release. Our results can explain the various effects of 2APB observed in intact cells.
|
pubmed:language |
eng
|
pubmed:journal |
|
pubmed:citationSubset |
IM
|
pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/2-aminoethoxydiphenyl borate,
http://linkedlifedata.com/resource/pubmed/chemical/Adenosine Triphosphate,
http://linkedlifedata.com/resource/pubmed/chemical/Boron Compounds,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium Channels,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium-Transporting ATPases,
http://linkedlifedata.com/resource/pubmed/chemical/Enzyme Inhibitors,
http://linkedlifedata.com/resource/pubmed/chemical/Inositol 1,4,5-Trisphosphate...,
http://linkedlifedata.com/resource/pubmed/chemical/Receptors, Cytoplasmic and Nuclear,
http://linkedlifedata.com/resource/pubmed/chemical/Thapsigargin
|
pubmed:status |
MEDLINE
|
pubmed:month |
Feb
|
pubmed:issn |
0143-4160
|
pubmed:author |
|
pubmed:copyrightInfo |
Copyright 2001 Harcourt Publishers Ltd.
|
pubmed:issnType |
Print
|
pubmed:volume |
29
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
111-6
|
pubmed:dateRevised |
2010-11-18
|
pubmed:meshHeading |
pubmed-meshheading:11162848-Adenosine Triphosphate,
pubmed-meshheading:11162848-Animals,
pubmed-meshheading:11162848-Boron Compounds,
pubmed-meshheading:11162848-Calcium,
pubmed-meshheading:11162848-Calcium Channels,
pubmed-meshheading:11162848-Calcium-Transporting ATPases,
pubmed-meshheading:11162848-Cell Line,
pubmed-meshheading:11162848-Cell Membrane Permeability,
pubmed-meshheading:11162848-Dose-Response Relationship, Drug,
pubmed-meshheading:11162848-Enzyme Inhibitors,
pubmed-meshheading:11162848-Inositol 1,4,5-Trisphosphate Receptors,
pubmed-meshheading:11162848-Muscle, Smooth, Vascular,
pubmed-meshheading:11162848-Rats,
pubmed-meshheading:11162848-Receptors, Cytoplasmic and Nuclear,
pubmed-meshheading:11162848-Thapsigargin
|
pubmed:year |
2001
|
pubmed:articleTitle |
2-Aminoethoxydiphenyl borate affects the inositol 1,4,5-trisphosphate receptor, the intracellular Ca2+ pump and the non-specific Ca2+ leak from the non-mitochondrial Ca2+ stores in permeabilized A7r5 cells.
|
pubmed:affiliation |
Laboratorium voor Fysiologie, K. U. Leuven Campus Gasthuisberg O/N, Leuven, Belgium. Ludwig.Missiaen@med.kuleuven.ac.be
|
pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|