Journal
BRITISH JOURNAL OF CANCER
Volume 103, Issue 9, Pages 1400-1406Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/sj.bjc.6605945
Keywords
tumour; breast cancer; treatment response; pyruvate; fumarate; DNP
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Funding
- Cancer Research UK [C197/A3514]
- Royal College of Radiologists (UK)
- National Institute for Health Research Cambridge Biomedical Research Centre
- COST D38 'Metal-based systems for Molecular Imaging'
- EU
- GE Healthcare-BBSRC CASE
- National Institute for Health Research [CL-2008-14-009] Funding Source: researchfish
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BACKGROUND: The recent introduction of a dynamic nuclear polarisation technique has permitted noninvasive imaging of tumour cell metabolism in vivo following intravenous administration of C-13-labelled cell substrates. METHODS: Changes in hyperpolarised [1-C-13] pyruvate and [1,4-C-13(2)] fumarate metabolism were evaluated in both MDA-MB-231 cells and in implanted MDA-MB-231 tumours following doxorubicin treatment. RESULTS: Treatment of MDA-MB-231 cells resulted in the induction of apoptosis, which was accompanied by a decrease in hyperpolarised C-13 label flux between [1-C-13] pyruvate and lactate, which was correlated with a decrease in the cellular NAD(H) coenzyme pool. There was also an increase in the rate of fumarate conversion to malate, which accompanied the onset of cellular necrosis. In vivo, the decrease in C-13 label exchange between pyruvate and lactate and the increased flux between fumarate and malate, following drug treatment, were shown to occur in the absence of any detectable change in tumour size. CONCLUSION: We show here that the early responses of a human breast adenocarcinoma tumour model to drug treatment can be followed by administration of both hyperpolarised [1-C-13] pyruvate and [1,4-C-13(2)] fumarate. These techniques could be used, therefore, in the clinic to detect the early responses of breast tumours to treatment. British Journal of Cancer (2010) 103, 1400-1406. doi: 10.1038/sj.bjc.6605945 www.bjcancer.com Published online 5 October 2010 (C) 2010 Cancer Research UK
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