Linked Life Data

6320871

Source:http://linkedlifedata.com/resource/pubmed/id/6320871

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1984-4-12
pubmed:abstractText
The efflux of adenine nucleotides from three human tumor mitochondria has been investigated with mitochondria prelabeled with radioactive ATP. Uncouplers induce a large efflux of adenine nucleotides from mitochondria from human hepatoma and oat cell carcinoma while efflux from astrocytoma mitochondria is less. This efflux does not require exchangeable anions, i.e., adenine nucleotides or pyrophosphate, in the extramitochondrial medium, and is not sensitive to atractyloside. The efflux is more extensive with dinitrophenol and CCCP than with valinomycin-K+, and may account for the differential effects of the two types of uncouplers on uncoupler-stimulated ATPase of tumor mitochondria previously reported by us. Dinitrophenol and CCCP do not elicit any efflux of adenine nucleotides from normal liver mitochondria. Efflux of orthophosphate from tumor mitochondria is also greater with dinitrophenol and CCCP; however, the more interesting finding is that the concentration of orthophosphate in these mitochondria is unusually high, i.e., 10-40-times greater than the intramitochondrial phosphate concentration of liver mitochondria. Atractyloside sensitive transport of ATP and ADP in human tumor mitochondria has also been determined. Vmax values for both ADP and ATP transport are lower than those obtained with liver mitochondria, especially with ADP transport. ATP transport in tumor mitochondria is not affected by CCCP in contrast to the 4-5-fold stimulation observed in liver mitochondria.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
27
pubmed:volume
764
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
203-12
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Characteristics of adenine nucleotide fluxes and transport in human tumor mitochondria.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.