Linked Life Data

21621518

Source:http://linkedlifedata.com/resource/pubmed/id/21621518

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2011-6-20
pubmed:abstractText
Parathyroid hormone (PTH) was recently demonstrated to enhance the HCO(3)(-) secretion through the apical anion channel, cystic fibrosis transmembrane conductance regulator (CFTR), but how the HCO(3)(-) entered the epithelial cells was not well understood, in part, due to the lack of specific inhibitors of the basolateral HCO(3)(-) transporters. Moreover, the function of the PTH-stimulated HCO(3)(-) secretion has never been investigated in vivo. Here, we designed three specific pairs of small interfering RNA sequences to simultaneously knockdown three variants of the electrogenic Na(+)/HCO(3)(-) co-transporter (NBCe)-1 in the intestinal epithelium-like Caco-2 monolayer. The results showed that NBCe1 mRNA levels were markedly reduced, and the PTH-induced transepithelial current and voltage changes were diminished after triple knockdown as determined by quantitative real-time PCR and Ussing chamber technique, respectively. An in vivo ligated intestinal loop study further showed that there was an increased fluid secretion, presumably driven by HCO(3)(-) transport, in the ileum, but not in jejunum or colon, of rats administered intravenously with 2 ?g/kg body weight of rat PTH 1-34. Therefore, the present results suggested that PTH stimulated intestinal HCO(3)(-) secretion, particularly in the ileum, by inducing the basolateral HCO(3)(-) uptake via NBCe1.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1090-2104
pubmed:author
pubmed:copyrightInfo
Copyright © 2011 Elsevier Inc. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
17
pubmed:volume
409
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
775-9
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Electrogenic Na?/HCO?? co-transporter-1 is essential for the parathyroid hormone-stimulated intestinal HCO?? secretion.
pubmed:affiliation
Consortium for Calcium and Bone Research, Faculty of Science, Mahidol University, Bangkok, Thailand. naratt@narattsys.com
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't