Linked Life Data

8312358

Source:http://linkedlifedata.com/resource/pubmed/id/8312358

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1994-3-21
pubmed:abstractText
Regulatory volume decrease (RVD) has been studied in cultured human fibroblasts incubated in a complete growth medium at low osmolality (215 mosmolal). After the initial swelling induced by hypotonic treatment, cells recover their volume almost completely within about 60 min. This RVD is associated with comparable losses of cell potassium and amino acids. After an initial increase, cell content of sodium is kept at values close to control. Chromatographic analysis of intracellular amino-acid pool has shown that RVD-associated decrease in cell amino acids is due for the most part to changes in the intracellular concentration of L-glutamine. RVD-exerting cells undergo a rapid and marked depolarization that is maintained after cell volume recovery. This change in membrane potential has been detected with measurements of both the transmembrane distribution ratios of L-arginine and of fluorescence of potential-sensitive dye bis-oxonol. Due to depolarization, the trans-membrane gradient of sodium electrochemical potential is lowered. It is proposed that cell depolarization concurs to keep the intracellular concentration of amino acids low by inhibiting sodium-coupled uptake through system A.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
13
pubmed:volume
1220
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
139-45
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Regulatory volume decrease of cultured human fibroblasts involves changes in intracellular amino-acid pool.
pubmed:affiliation
Istituto di Patologia Generale, Università degli Studi di Parma, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't