Linked Life Data

3105968

Source:http://linkedlifedata.com/resource/pubmed/id/3105968

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1987-6-9
pubmed:abstractText
Difluoromethylornithine (DFMO) is a nonreversible inhibitor of ornithine decarboxylase (ODC), the initial rate-limiting enzyme in the polyamine biosynthetic pathway. When HL60 leukemic cells were incubated in the presence of concentrations of DFMO from 0.05 mM to 5 mM, there was a concentration-dependent inhibition of ODC activity apparent within 24 h. Likewise, cellular polyamine levels were reduced by the presence of DFMO in a concentration-dependent manner after 4 days. The growth of cells incubated with 0.5 mM or greater was inhibited after 3-4 cell doublings. When the concentration of DFMO was less than 0.5 mM, growth was not inhibited. Methylglyoxal-bis(guanylhydrazone) (MGBG) uptake was enhanced in cells treated with concentrations of 0.05-0.5 mM DFMO, but not enhanced in cells treated with DFMO concentrations of 1 mM or greater. DFMO-induced cellular polyamine depletion does enhance MGBG uptake into HL60 cells, but treatment with high concentrations of DFMO, which deplete polyamines to the extent that growth is inhibited, negate this effect.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0009-3157
pubmed:author
pubmed:issnType
Print
pubmed:volume
33
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
110-22
pubmed:dateRevised
2009-11-11
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Difluoromethylornithine enhances the uptake of methylglyoxal-bis(guanylhydrazone) prior to inhibiting leukemic cell proliferation.
pubmed:publicationType
Journal Article