An iron-regulated methionine redox axis governs adipose browning and cancer cachexia.

An iron-dependent methionine redox pathway controls adipose browning and cachexia, with MsrA deletion reducing cachexia and extending survival in mouse models.

• Why it matters: Adipose browning and atrophy are early, lethal events in cancer cachexia, yet the molecular mechanisms driving these processes remain unclear, limiting therapeutic options.
• What they did: The study used human-derived samples and mouse models to identify an iron-regulated pathway involving MSRA that promotes adipose browning through adrenergic stimulation and protein stabilization.
• The result: Disruption of MsrA impairs browning and cachexia, suggesting that targeting the β3 adrenergic receptor-iron-MSRA axis could offer new clinical strategies to combat cancer-associated cachexia.