Linked Life Data

15895241

Source:http://linkedlifedata.com/resource/pubmed/id/15895241

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2005-7-15
pubmed:abstractText
The renal potassium channel ROMK is a crucial element of K+ recycling and secretion in the distal tubule and the collecting duct system. Mutations in the ROMK gene (KCNJ1) lead to hyperprostaglandin E syndrome/antenatal Bartter syndrome, a life-threatening hypokalemic disorder of the newborn. The localization of ROMK channel protein, however, remains unknown in humans. We generated an affinity-purified specific polyclonal anti-ROMK antibody raised against a C-terminal peptide of human ROMK. Immunoblotting revealed a 45 kDa protein band in both rat and human kidney tissue. In human kidney sections, the antibody showed intense staining of epithelial cells in the cortical and medullary thick ascending limb (TAL), the connecting tubule, and the collecting duct. Moreover, a strong expression of ROMK protein was detected in cells of the macula densa. In epithelial cells of the TAL expression of ROMK protein was mainly restricted to the apical membrane. In human fetal kidney expression of ROMK protein was detected mainly in distal tubules of mature nephrons but not or only marginally in the collecting system. No expression was found in early developmental stages such as comma or S shapes, indicating a differentiation-dependent expression of ROMK protein. In summary, these findings support the proposed role of ROMK channels in potassium recycling and in the regulation of K+ secretion and present a rationale for the phenotype observed in patients with ROMK deficiency.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0948-6143
pubmed:author
pubmed:issnType
Print
pubmed:volume
123
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
553-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Expression of the potassium channel ROMK in adult and fetal human kidney.
pubmed:affiliation
Department of Clinical Pharmacology, Johann Wolfgang Goethe University, Frankfurt, Germany. r.m.nuesing@med.uni-frankfurt.de
pubmed:publicationType
Journal Article, Comparative Study