Succinate promotes multiple myeloma cell proliferation through TCA cycle oxidation.

Elevated succinate in multiple myeloma is linked to increased proliferation of several myeloma cell lines via mitochondrial TCA cycle oxidation, with ATP-coupled respiration rising.

• Why it matters: Bone marrow metabolite changes in myeloma may support malignant growth, but how specific TCA-cycle metabolites like succinate affect proliferation and progression is unclear.
• What they did: The study tested succinate’s effects on multiple myeloma cell lines and primary myeloma cells, measuring mitochondrial respiration and succinate-derived carbon incorporation into TCA intermediates. It also used ATP synthase inhibition and large-scale transcriptomic data to assess links between transporter expression and progression.
• The result: Succinate-driven proliferation required mitochondrial oxidative phosphorylation and was blocked by ATP synthase inhibition; higher mitochondrial succinate transporter expression associates with accelerated disease progression, suggesting a therapeutic target.

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