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聽This study examined whether a blood or fluid test for abnormal alpha-synuclein, a protein linked to 笔补谤办颈苍蝉辞苍鈥檚 disease, was related to differences in brain scans in people with early 笔补谤办颈苍蝉辞苍鈥檚 disease. The researchers used diffusion MRI, a type of brain imaging that can show how water moves through brain tissue and reveal subtle structural changes, and focused on a measure called free-water imaging, which can pick up signs of tissue damage or inflammation. They compared people who tested positive for alpha-synuclein seeding activity, meaning the biomarker was present, with those who tested negative. Among 462 participants, most had a positive test. People with a positive result were more likely to have loss of smell and a shorter time since their movement symptoms began. The brain scan analysis found one small difference in a pathway linked to movement, but overall the positive and negative groups were not very different on the broader scan measures. In other words, the biomarker confirmed 笔补谤办颈苍蝉辞苍鈥檚-related protein changes, but it did not strongly separate people by the degree of brain tissue change seen on these scans.
FIGURE 1
CONSORT flow diagram of participant selection. The numbers of individuals assessed for eligibility and included in each analysis group are shown. AIDP鈥�=鈥堿utomated Imaging Differentiation for Parkinsonism; PPMI鈥�=鈥塒arkinson’s Progression Markers Initiative; SAA鈥�=鈥塻eed amplification.