Real-time NMR analysis of glutamine metabolism for screening anti-cancer agents in living cells

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recombinant human GLS1 enzyme activity assays successfully ruled out computational false positives and demonstrated that Compound 2 (quercetin) acts as the exclusive, direct enzymatic inhibitor among the tested monomers, capable of effectively suppressing GLS1 activity. Overall, this work provides a robust platform for real-time metabolic profiling of glutamine metabolism and drug screening at the living cell level, and offers new insights into the mechanisms of TCMs in anticancer therapy.