Glucose metabolism in RIF-1 tumors after reduction in blood flow: an in vivo 13C and 31P NMR study.

Publication Type	Academic Article
Authors	Bhujwalla Z, Shungu D, Chatham J, Wehrle J, Glickson J
Journal	Magn Reson Med
Volume	32
Issue	3
Pagination	303-9
Date Published	09/01/1994
ISSN	0740-3194
Keywords	Glucose, Magnetic Resonance Spectroscopy, Sarcoma, Experimental
Abstract	Low pH appears to enhance the effectiveness of therapeutic hyperthermia. 13C and 31P NMR spectroscopy have been employed to examine the possibility that elevating glucose in a solid tumor while simultaneously reducing tumor blood flow would induce a more profound acidosis than either treatment alone. When blood flow in RIF-1 tumors was acutely reduced by administration of hydralazine and additional glucose was delivered locally by intratumoral injection, tumor acidosis (as determined by 31P NMR spectroscopy) during the period of reduced blood flow was not enhanced, relative to administration of hydralazine alone. Tumor NTP/P1 ratios decreased significantly within 20 min of hydralazine administration, whether or not glucose was injected, although NTP/P1 ratios were slightly higher in tumors that received extra glucose. Tumor lactate concentrations were not significantly different in glucose-supplemented tumors, despite glucose concentrations that were 4 to 5 times higher. When the added glucose was labeled with 13C, no correlation was detected between the pH in an individual tumor and the intensity of the 3-[13C]-lactate resonance in the same tumor.
DOI	10.1002/mrm.1910320305
PubMed ID	7984062