Elevated lactate production, a key characteristic of the aberrant tumour metabolism, can be detected non-invasively by deuterium (2H) magnetic resonance spectroscopy (MRS). To determine if 2H-labeled lactate measured by 2H MRS can serve as an early marker of tumour response, we investigate the association of treatment-induced signal changes in 2H-lactate in vitro with apoptotic cell death. We show that significantly lower 2H-lactate in 48-hour cisplatin treated cells (1.6 ± 0.4 mM) compared to those untreated (3.2 ± 0.4 mM) and 24-hour treated cells (4.0 ± 0.6 mM) is associated with with an increase in apoptotic area fraction.
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