Linked Life Data

16052237

Source:http://linkedlifedata.com/resource/pubmed/id/16052237

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2005-12-12
pubmed:abstractText
Fluorescent dyes are widely used to monitor changes in mitochondrial transmembrane potential (DeltaPsim). When MitoTracker Red CMXRos, tetramethylrhodamine methyl ester (TMRM), and 3,3'dihexyloxacarbocyanine iodide (DiOC6(3)) were utilized to examine the effects of the experimental anticancer drug adaphostin on intact cells or isolated mitochondria, decreased fluorescence was observed. In contrast, measurement of tetraphenylphosphonium uptake by the mitochondria using an ion-selective microelectrode failed to show any effect of adaphostin on DeltaPsim. Instead, further experiments demonstrated that adaphostin quenches the fluorescence of the mitochondrial dyes. Structure-activity analysis revealed that the adamantyl and p-aminobenzoic acid moieties of adaphostin are critical for this quenching. Anticancer drugs containing comparable structural motifs, including mitoxantrone, aminoflavone, and amsacrine, also quenched the mitochondrial probes. These results indicate the need for caution when mitochondrial dyes are utilized to examine the effects of xenobiotics on DeltaPsim and suggest that some previously reported direct effects of anticancer drugs on mitochondria might need re-evaluation.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1350-9047
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
151-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Adaphostin and other anticancer drugs quench the fluorescence of mitochondrial potential probes.
pubmed:affiliation
Department of Oncology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.
pubmed:publicationType
Journal Article, In Vitro, Research Support, N.I.H., Extramural