Linked Life Data

1328259

Source:http://linkedlifedata.com/resource/pubmed/id/1328259

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1992-11-23
pubmed:abstractText
Effects of monensin were examined on the intracellular processing of the GABAA/benzodiazepine receptor (GABAA/BZDR) in neuron cultures derived from embryonic chicken brain, using 3H-flunitrazepam as the probe for the benzodiazepine modulator site on the receptor. Incubation of cultures with 0.1 or 1 microM monensin for 3 h blocked the binding of 3H-flunitrazepam by about 18%. Loss of ligand binding was due to a reduction in the number of binding sites, with no significant changes in receptor affinity. The general cellular protein synthesis and glycosylation in the cells were inhibited by 26% and 56%, respectively, in the presence of 1 microM monensin, as detected by assaying the incorporation of 3H-leucine and 3H-galactose. In contrast, an increase was observed for mannose incorporation by the cultures in the presence of the drug. Moreover, the results from in situ trypsinization of the cultures following monensin treatment showed that monensin did not alter the distribution of intracellular and surface receptors. The data suggest that monensin induces the down-regulation of GABAA/BZDR by generating abnormal glycosylation of the receptor and interrupting its transport within the Golgi apparatus, as well as from the Golgi apparatus to the intracellular pool and cell membrane. The galactosylation of receptor proteins may be important for the maturation of the receptor.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0730-2312
pubmed:author
pubmed:issnType
Print
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
166-71
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Monensin inhibits the binding of 3H-flunitrazepam to and reveals the intracellular passage of GABAA/benzodiazepine receptor.
pubmed:affiliation
Department of Anatomy, College of Medicine, National Taiwan University, Taipei, Republic of China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't