Linked Life Data

18380541

Source:http://linkedlifedata.com/resource/pubmed/id/18380541

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2009-4-28
pubmed:abstractText
We have examined the changes of intercellular electrical coupling protein connexin-43 (Cx43) and of PKC-epsilon in heart atria of diabetic rats and/or after the treatment with triiodothyronine (T(3)). Diabetes was induced in Wistar-Kyoto rats by streptozotocin (50 mg/kg, i.v.) and atria were examined after 5 (acute stage) and 10 (chronic stage) weeks. T(3) (10 microg/100 g/day) was applied via a gastric tube for the last 10 days prior to the end of the experiments to non-diabetic and to the half of diabetic rats. Expression and phosphorylated status of Cx43, as well as expression of PKC-epsilon, were analyzed by Western blots using mouse monoclonal anti-Cx43 and rabbit polyclonal anti-PKC-epsilon antibodies. We found that the Cx43 expression was significantly increased after the treatment with T(3) and in the acute diabetes. Both in diabetes and after T(3) treatment the phosphorylation of Cx43 isoforms was markedly suppressed compared to the non-diabetic and T(3)-untreated controls. Such a down-regulation was less pronounced in diabetic rats after the T(3)-treatment. The expression of atrial PKC-epsilon was increased in diabetic rats. This increase was suppressed after T(3) administration and the expression was decreased in T(3)-treated non-diabetic rats. We suggest that the reduced Cx43 phosphorylation in diabetic and hyperthyroid rats can deteriorate a cell-to-cell coupling and consequently facilitate a development of atrial tachyarrhythmia in diabetic or hyperthyroid animals.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0862-8408
pubmed:author
pubmed:issnType
Print
pubmed:volume
58
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
211-7
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Diabetes and thyroid hormones affect connexin-43 and PKC-epsilon expression in rat heart atria.
pubmed:affiliation
Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovak Republic.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't