D08 Neurofilament light protein in blood as a potential biomarker of neurodegeneration in hungtington’s disease: a retrospective cohort analysis

Abstract

Background Blood biomarkers of neuronal damage could facilitate clinical management of and therapeutic development for Huntington’s disease. We investigated whether neurofilament light protein (NfL) in blood is a potential prognostic marker of neurodegeneration in patients with Huntington’s disease. Methods In the 3 year, 298-participant TRACK-HD cohort, we did a retrospective analysis of the relationship between plasma NfL and clinical and neuroimaging measures previously identified as being the strongest predictors of HD progression. Cross-sectional and longitudinal relationships were analysed using random effect models of within-subject correlation. In a separate 37-participant cohort we quantified NfL in cerebrospinal fluid (CSF) and plasma. Findings Mean concentrations of plasma NfL at baseline were significantly higher in HTT mutation carriers than in controls and the difference increased with disease stage. At any given timepoint, plasma NfL correlated with clinical and MRI findings. In longitudinal analyses, baseline plasma NfL correlated significantly with subsequent decline in cognition (SDMT r=–0.374, p Interpretation NfL in plasma shows promise as a potential prognostic blood biomarker of disease onset and progression in Huntington’s disease.