Brain-Only Versus GI-Only Synucleinopathy: A Comprehensive Autopsy Study With Both IHC and SAA
This comprehensive autopsy study utilizing both immunohistochemistry and RT-QuIC seed amplification assays on 50 Parkinson's disease and 128 control subjects suggests that brain-only synucleinopathy is approximately 16 times more common than GI-only synucleinopathy, while also demonstrating that the burden of alpha-synuclein in the gastrointestinal tract correlates significantly with motor and autonomic dysfunction.