Linked Life Data

2852433

Source:http://linkedlifedata.com/resource/pubmed/id/2852433

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1989-3-27
pubmed:abstractText
We have studied the ontogeny of Na-K ATPase-mediated Na and K transport in rat renal proximal tubular cells using electron probe analysis. The cells were cultured from kidneys of 10-day-old, young (Y), and 40-day-old, adult (A) rats. Before an experiment cells were Na-loaded and K-depleted by incubation in K-free medium. The maximum rate of ouabain-sensitive Na and K transport was measured after reactivating the Na-K pump by transferring the cells from K-free medium to medium containing 5 mM K. In cells cultured for 2 days, ouabain-sensitive Na and K net initial transport rates were significantly higher in A than in Y cells. Between 2 and 4 days in culture there was a significant decrease in ouabain-sensitive Na and K transport rates in both Y and A cells. From 2 to 4 days of culture there was, in Y but not in A cells, a significant decrease in K/Na ratio. The decrease in K/Na ratio was due to a significant increase in Na content. After incubation in K-free medium, net intracellular solute accumulation was observed in A and Y cells cultured for 4 days but not in A and Y cells cultured for 2 days. In conclusion, maximal Na- and K-pump-mediated transport increases during terminal differentiation. This increase can be measured in cells cultured for 2 days. With longer time in culture, Na-K pump activity decreases and the difference between A and Y cells is not measurable.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0001-6772
pubmed:author
pubmed:issnType
Print
pubmed:volume
132
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
129-34
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Studies on terminal differentiation of rat renal proximal tubular cells in culture: ouabain-sensitive K and Na transport.
pubmed:affiliation
Harvard Medical School, Boston, MA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't