筋萎縮性側索硬化症における神経線維軽鎖プロテオフォームは脳脊髄液と血液で異なる
John B Coulton1,2, Yingxin He1,2, Melissa M Budelier3,4
1Department of Neurology, Washington University in St. Louis, St. Louis, MO.
Abstract:
We used targeted immunopurification-mass spectrometry (IP-MS) to characterize human neurofilament light chain (NfL) proteoforms across various compartments to assess their alterations in amyotrophic lateral sclerosis (ALS). NfL is truncated in cerebrospinal fluid (CSF) and blood in patients with sporadic ALS (sALS) and these proteoforms differ between compartments. Mid-domain species were elevated in CSF whereas plasma NfL proteoforms were mostly comprised of the tail subdomain region. Our results suggest NfL isoforms are proteolyzed and differentially distributed between ALS biofluid compartments and that analyzing by these specific regions or in ratios between regions can provide improvements in biomarker utility. These insights enhance the understanding of NfL and its potential for disease monitoring and therapeutic targeting in ALS. ANN NEUROL 2025.
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