Abstract Details

Title Neurofilament Light-Chain Protein as A Potential Biomarker of Neurodegeneration and Progression in Former Contact Sports Athletes

Topic Neuro Trauma, Critical Care, and Sports Neurology

Presentation(s) S30 - Sports Neurology and Neuro Trauma (4:18 PM-4:30 PM)

Poster/Presentation
Number 005

Objective To evaluate serum neurofilament light chain (NF-L) levels in former professional contact sports athletes with multiple concussions (ExPro) as a potential biomarker of neurodegeneration and disease progression.

Background

Lack of a diagnostic biomarker for chronic traumatic encephalopathy precludes in vivo detection of the pathology at early stages before the disease progresses to an irreversible stage.

Design/Methods Concentrations of NF-L in the serum of fifty-two cognitively normal ExPro (54.5±12.9 years of age) and twenty-one healthy controls (HC) with no history of concussions (49.4±10.1 years of age) were measured using single molecule array (Simoa) technology. We related concentrations of NF-L to the hippocampal and total ventricular volumes, white matter integrity in the uncinate, cingulum, superior longitudinal fasciculus, fornix (Fx) and corpus callosum (CC) as well as to the resting-state functional connectivity between components of the default mode network. Eighteen of the participants in the ExPro underwent follow-up imaging after 2 years. All statistical analyses were corrected for multiple comparisons, age, and intracranial volume.

Results Levels of serum NF-L were not significantly different between the ExPro and HC (p=0.693). However, in the ExPro group, NF-L levels were significantly correlated with the mean diffusivity (MD) of CC and Fx (r=0.315, p=0.024; r=0.474, p=0.004; respectively), and total ventricular volume (r= 0.446, p=0.01). Moreover, NF-L levels in the ExPro group at the first visit were significantly correlated with the amount of increase in CC MD at the 2-year follow-up (r=0.567, p=0.018).

Conclusions Serum NF-L levels reflect neuronal changes in the ExPro group and predict the extent of decrease in white matter integrity over time. Serum NF-L might be a biomarker of neurodegeneration and disease progression in ExPro.

Authors/Disclosures
Foad Taghdiri, MD, MSc PRESENTER	Dr. Taghdiri has nothing to disclose.
	No disclosure on file
	No disclosure on file
Apameh Tarazi, MD (Toronto Western Hospital)	No disclosure on file
	No disclosure on file
	No disclosure on file
David J. Mikulis, MD (Toronto Hosp Western Div)	Dr. Mikulis has received personal compensation in the range of $10,000-$49,999 for serving as an Expert Witness for Neinstein Personal Injury Lawyers. Dr. Mikulis has received stock or an ownership interest from Thornhill Medical, Inc.. Dr. Mikulis has received intellectual property interests from a discovery or technology relating to health care.
	No disclosure on file
	No disclosure on file
Kaj Blennow	Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Abbvie. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for AC Immune. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for ALZPath. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for AriBio. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Beckman-Coulter. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for BioArctic. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Biogen. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Eisai. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Lilly. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Moleac Pte. Ltd. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Neurimmune. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Novartis. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Ono Pharma. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Prothena. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Quanterix. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche Diagnostics. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Sanofi. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Siemens Healthineers. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Abbvie. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for AC Immune. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for ALZPath. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for AriBio. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Beckman-Coulter. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for BioArctic. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Biogen. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Eisai. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Lilly. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Moleac Pte. Ltd. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Neurimmune. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Novartis. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Ono Pharma. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Prothena. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Quanterix. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche Diagnostics. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sanofi. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Siemens Healthineers. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Julius Clinical. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for AC Immune. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Biogen. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Celdara Medical. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Eisai. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche Diagnostics. Kaj Blennow has received personal compensation in the range of $500-$4,999 for serving as a Co-founder with Brain Biomarker Solutions.
Henrik Zetterberg (Sahlgrenska University Hospital/Molndal)	Henrik Zetterberg has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Abbvie, Acumen, Alector, Alzinova, ALZpath, Amylyx, Annexon, Apellis, Artery Therapeutics, AZTherapies, Cognito Therapeutics, CogRx, Denali, Eisai, LabCorp, Merry Life, Nervgen, Novo Nordisk, Optoceutics, Passage Bio, Pinteon Therapeutics, Prothena, Quanterix, Red Abbey Labs, reMYND, Roche, Samumed, Siemens Healthineers, Triplet Therapeutics, and Wave. Henrik Zetterberg has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Alzecure, BioArctic, Biogen, Cellectricon, Fujirebio, Lilly, Novo Nordisk, Roche, and WebMD. Henrik Zetterberg has received personal compensation in the range of $500-$4,999 for serving as an Editor, Associate Editor, or Editorial Advisory Board Member for Wiley and Elsevier. Henrik Zetterberg has stock in Brain Biomarker Solutions.
	No disclosure on file
Carmela Tartaglia, MD (Toronto Western Hospital, University of Toronto)	Dr. Tartaglia has received personal compensation in the range of $0-$499 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. The institution of Dr. Tartaglia has received research support from NIH. The institution of Dr. Tartaglia has received research support from University of Toronto.

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