Aberrant metabolic features of cancer cells are closely related to tumorigenesis and therapeutic response. Here, we report a sensitive magnetic resonance sensing platform, capable of analyzing metabolic fluxes in mass-limited samples. Termed hyperpolarized micromagnetic resonance spectrometer (HMRS), this platform achieved to characterize the metabolic flux in cancer stem cells in real-time and assess therapeutic responses much earlier than any changes in cell viability. This will become a versatile platform for rapid and sensitive exploration of metabolic dynamics in cancer.
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