13C magnetic
resonance spectroscopic imaging (13C-MRSI)
is a promising technique for elucidating metabolic heterogeneity in breast
cancer. We used 13C-MRSI to evaluate the extent of glycolysis in different
histologic and molecular breast cancer subtypes and correlated these findings
with the expression of a key transmembrane transporter (MCT1) and glycolytic
enzyme (LDHA). In addition to a strong correlation between glycolysis and tumor
volume, there was higher expression of MCT1 and LDHA as well as CAIX, a hypoxia
marker, in the more glycolytic tumors. This is the first study in humans to demonstrate
the relationship between intertumoral heterogeneity on gene expression analysis
and 13C-MRSI.
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