Parkinson's at the brain border.

α-synuclein aggregates at the brain border actively reshape lymphatic integrity and the neuroimmune macroenvironment, revealing a functional consequence in Parkinson’s disease.

• Why it matters: Parkinson’s disease is increasingly viewed as extending beyond neurons, but the functional impact of pathology at brain–lymphatic interfaces is not well defined.
• What they did: Stevenson et al. in JEM highlight the functional consequence of α-synuclein aggregates at the brain border, linking them to changes in lymphatic integrity and neuroimmune context.
• The result: The findings uncover an active role for α-synuclein aggregates in remodeling lymphatic integrity and the neuroimmune macroenvironment, informing how neuroinflammation may be shaped.