Oleksandr Dergai, Joanne Wuu, Magdalena Koziczak-Holbro, Andrea Malaspina, Volkan Granit, Jessica P Hernandez, Anne Cooley, Ruchika Sachdev, Lili Yu, Michael Bidinosti, Ludivine Flotte, Mark Nash, Lori L Jennings, James D Berry, Lucie I Bruijn, Sophie Brachat, Michael Benatar
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引用次数: 0
Abstract
Objective: Biomarkers with clear contexts of use are important tools for amyotrophic lateral sclerosis (ALS) therapy development. Understanding their longitudinal trajectory in the untreated state is key to their use as potential markers of pharmacodynamic response. To this end, we undertook a large-scale proteomic study in well-phenotyped cohorts to identify biomarker candidates of ALS disease state and disease progression.
Methods: Clinical phenotypic data and biofluid samples, collected from patients with ALS and healthy controls through multiple longitudinal natural history studies, were used to identify biomarker candidates. Slow off-rate modified aptamer (SOMAmer)-based relatively quantitative measurement of ~7,000 proteins was performed in plasma and cerebrospinal fluid (CSF), with immunoassay validation of candidates of interest.
Results: We identified 329 plasma proteins significantly differentially regulated between ALS and controls (adjusted p-value <0.05), with 25 showing >40% relative abundance. PDLIM3, TNNT2, and MYL11 had the greatest log-fold elevation, whereas ANTXR2 and ART3 had the greatest log-fold reduction. A similar set of plasma proteins was found to increase (eg, PDLIM3, TNNT2, and MYL11) or decrease (eg, ANTXR2, ART3, and MSTN) with disease progression. CSF proteins with the greatest log-fold elevation included NEFL, NEFH, CHIT1, CA3, MYL11, and GPNMB. These results were confirmed in an independent replication cohort. Moreover, tissue-specific signature enrichment suggests a significant contribution of muscle as a source of these biomarkers. Plasma KCNIP3 was elevated by ~60% in those on riluzole. Immunoassays provided orthogonal validation of plasma TNNT2 and CSF GPNMB.
Interpretation: We identified an array of novel biomarkers with the potential to serve as response biomarkers to aid therapy development, as well as to shed light on the underlying biology of disease. ANN NEUROL 2025.
期刊介绍：
Annals of Neurology publishes original articles with potential for high impact in understanding the pathogenesis, clinical and laboratory features, diagnosis, treatment, outcomes and science underlying diseases of the human nervous system. Articles should ideally be of broad interest to the academic neurological community rather than solely to subspecialists in a particular field. Studies involving experimental model system, including those in cell and organ cultures and animals, of direct translational relevance to the understanding of neurological disease are also encouraged.
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