Nicotinamide nucleotide transhydrogenase directly couples redox homeostasis to proline biosynthesis in human glioma.
Nicotinamide nucleotide transhydrogenase (NNT) links mitochondrial NAD(P)(H) balance to proline synthesis, supporting hypoxic glioma growth with a significant dependence on NNT activity.
- Why it matters: Understanding how glioma cells maintain redox homeostasis under hypoxia is crucial for developing targeted therapies, as these processes support tumor survival and proliferation.
- What they did: The study used isotope-labeled metabolite tracing in glioma models to reveal that NNT facilitates NADH to NADPH transhydrogenation in mitochondria, promoting proline biosynthesis and antioxidant defense.
- The result: Findings show NNT-driven mitochondrial NADPH production is essential for proline accumulation and tumor progression, positioning NNT as a potential metabolic vulnerability in human glioma.