Nitrate-responsive Sialin2 couples stress granule assembly and clearance to maintain neuronal homeostasis.

Nitrate-responsive Sialin2 regulates stress granule dynamics and neuroprotection, with nitrate treatment reducing pathology in an ALS mouse model.

• Why it matters: Understanding how extracellular signals coordinate stress granule assembly and clearance is crucial for developing interventions for neurodegenerative diseases like ALS, where protein aggregation and impaired clearance are common.
• What they did: The study examined Sialin2's role in stress granule homeostasis through phase separation and interaction with G3BP scaffolds during stress and recovery, using cellular and mouse models with nitrate treatment.
• The result: Loss of Sialin2 delays stress granule resolution and increases ALS-linked protein retention, while nitrate treatment in mice reduces pathology, neuroinflammation, and delays functional decline, suggesting a protective signaling pathway.