Linked Life Data

8892397

Source:http://linkedlifedata.com/resource/pubmed/id/8892397

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1997-1-31
pubmed:abstractText
The chemotherapeutic regimen of N-(phosphonacetyl)-L-aspartate (PALA) followed 17 h later by 6-methylmercaptopurine riboside (MMPR) and 6-aminonicotanamide (6AN) has been shown to be a potent sensitizer of anti-neoplastic therapy. We undertook this study to compare the therapeutic and metabolic effects of this triple drug combination vs one of its components, 6AN, in a murine mammary carcinoma. After treatment with PALA, MMPR and 6AN, a new peak was detected which was assigned to 6-phosphogluconate (6PG), which is a marker of inhibition of the pentose phosphate pathway at the 6-phosphogluconate dehydrogenase step. Treatment with PALA, MMPR and 6AN also induced a decrease in the ratios of nucleoside triphosphate/inorganic phosphate (NTP/Pi) and phosphocreatine/inorganic phosphate (PCr/Pi) similar to previous results with a different tumor model. These effects were most pronounced at 6 and 10 h. In addition, an increase in PME'/phosphocholine (PME' = downfield peak in the phosphomonoester region) was detected, which was expected because of the cytotoxic effect of this regimen. Treatment with 6AN alone also resulted in the detection of 6PG with a maximum intensity at 6 h post-6AN. Treatment with 6AN alone induced a smaller change in PME'/PC and failed to cause a decrease in PCr/Pi or NTP/Pi at 6 and 10 h. The enhanced response to the combination of PALA, MMPR and 6AN vs 6AN alone, both with regard to cytotoxicity and radiosensitization, may be due to energy depletion.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0952-3480
pubmed:author
pubmed:issnType
Print
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
114-20
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
In vivo detection by 31P NMR of pentose phosphate pathway block secondary to biochemical modulation.
pubmed:affiliation
Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York 10021, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.