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Abstract Details

Establishing Demographic and Comorbidity Based Reference Ranges for NfL and GFAP in Healthy Controls
Multiple Sclerosis
P1 - Poster Session 1 (8:00 AM-9:00 AM)
3-005

To assess the effect of sex and age on plasma neurofilament light (NfL) and glial fibrillary acidic protein (GFAP) levels in a healthy control (HC) cohort.

Blood NfL levels vary with age and comorbid disorders. The effect of age on blood GFAP has not been investigated.

HC subjects without neurologic disease, cancer, diabetes, and traumatic brain injury were recruited from community and wellness events. Plasma NfL and GFAP were measured using the SR-X Simoa Quanterix platform. Changes in biomarker levels per year of age were estimated and log-linear predictive models generated.

110 of 155 HC samples have been analyzed to date. Age ranges from 16.4 to 59.6 years with the following distribution: 15-19 (11.82%), 20-30 (36.36%), 30-40 (21.82%), 40-50 (15.45%) and 50-60 (14.55%). Sex and racial distribution were female (64.5%), White (78.2%), 15.5% Hispanic, 7.4% Black, 5.5% Asian, 0.9 % American Indian, 1.8 % other. Geometric mean NfL concentrations increased by age, ranging from 2.47 pg/ml (CI: (1.87, 3.29) at 15-19 years to 7.22 pg/ml (CI: (5.97, 8.73) at 50-60 years. Geometric mean GFAP values increased from 49.99 pg/ml (CI: (41.74, 59.87) at 15-19 years to 72.56 pg/ml (CI: (60.16, 87.51) at 50-60 years. Adjusting for age and gender, expected NfL values increased by 2.57% per year (95% CI: (1.90%, 3.25%), p < 0.0001) overall, 2.72% (95% CI:(1.96%, 3.49%), p < 0.0001) in females, and 2.22% (95% CI:  (0.87%, 3.58%), p = 0.0018) in males.  Expected GFAP increased by 0.94% per year (95% CI:  (0.26%, 1.62%), p = 0.0067) overall and by 0.95% (95% CI:  (0.11%, 1.80%), p = 0.0273) in females.

Utilizing more stringent criteria for HC, our study replicates recent reports on blood NfL levels using national cohorts and provides novel data of plasma GFAP levels across a broad age distribution.

Authors/Disclosures
Tyler L. Borko, BA (University of Colorado)
PRESENTER 		Mr. Borko has nothing to disclose.
Britney Barrera (CU Anschutz Neurology) Ms. Barrera has nothing to disclose.
Alanna Ritchie (UC Denver AMC) Alanna Ritchie has nothing to disclose.
Sean Selva Sean Selva has nothing to disclose.
Stefan Sillau Stefan Sillau has nothing to disclose.
Eric Engebretson (University of Colorado Denver) Mr. Engebretson has nothing to disclose.
No disclosure on file
Brooke Valdez (University of Colorado) Brooke Valdez has nothing to disclose.
Enrique Alvarez, MD, PhD (University of Colorado) Dr. Alvarez has received personal compensation in the range of $10,000-$49,999 for serving on a Scientific Advisory or Data Safety Monitoring board for TG Therapeutics. Dr. Alvarez has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Biogen. Dr. Alvarez has received personal compensation in the range of $50,000-$99,999 for serving on a Scientific Advisory or Data Safety Monitoring board for EMD Serono. Dr. Alvarez has received personal compensation in the range of $50,000-$99,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Genentech. Dr. Alvarez has received personal compensation in the range of $50,000-$99,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Novartis. Dr. Alvarez has received personal compensation in the range of $10,000-$49,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. Dr. Alvarez has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sanofi. Dr. Alvarez has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Celgene/BMS. The institution of an immediate family member of Dr. Alvarez has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for UCB. The institution of Dr. Alvarez has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Horizon.
John Corboy, MD, FAAN (U of Colorado School of Medicine) Dr. Corboy has received personal compensation for serving as an employee of U of Coloado. Dr. Corboy has received personal compensation for serving as an employee of Rocky Mountain MS Center. Dr. Corboy has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Mylan. Dr. Corboy has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Bristol Myers Squib. Dr. Corboy has received personal compensation in the range of $10,000-$49,999 for serving as an Editor, Associate Editor, or Editorial Advisory Board Member for AAN. Dr. Corboy has received personal compensation in the range of $10,000-$49,999 for serving as an Editor, Associate Editor, or Editorial Advisory Board Member for American Neurological Association. Dr. Corboy has received personal compensation in the range of $5,000-$9,999 for serving as an Expert Witness for Mylan. The institution of Dr. Corboy has received research support from MedDay. The institution of Dr. Corboy has received research support from Novartis. The institution of Dr. Corboy has received research support from NMSS. The institution of Dr. Corboy has received research support from PCORI. The institution of Dr. Corboy has received research support from EMD Serono.
Anna Shah, MD (University of Colorado, Neurology Dept) The institution of Dr. Shah has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Bristol Myers Squibb. The institution of Dr. Shah has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for EMD Serono. The institution of Dr. Shah has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Amgen. The institution of Dr. Shah has received research support from Rocky Mountain MS Center. The institution of Dr. Shah has received research support from Genentech/Roche. Dr. Shah has received personal compensation in the range of $500-$4,999 for serving as a 好色先生al Speaker with Rocky Mountain MS Center.
Robert H. Gross, MD, FAAN (University of Colorado) Dr. Gross has nothing to disclose.
Diego Silva (Bristol-Myers Squibb Company) Diego Silva has received personal compensation for serving as an employee of BMS. Diego Silva has received stock or an ownership interest from BMS.
Gregory Owens, PhD Dr. Owens has received intellectual property interests from a discovery or technology relating to health care.
Amanda L. Piquet, MD, FAAN (University of Colorado) The institution of Dr. Piquet has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Genentech/Roche. The institution of Dr. Piquet has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Alexion. The institution of Dr. Piquet has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Kyverna . The institution of Dr. Piquet has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Genentech/Roche. The institution of Dr. Piquet has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Kyverna. The institution of Dr. Piquet has received personal compensation in the range of $10,000-$49,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Alexion. Dr. Piquet has received personal compensation in the range of $10,000-$49,999 for serving as an Expert Witness for Sands Anderson PC. Dr. Piquet has received personal compensation in the range of $5,000-$9,999 for serving as an Expert Witness for Joe Jones Law Firm. Dr. Piquet has received personal compensation in the range of $500-$4,999 for serving as an Expert Witness for Cortez & Associates. Dr. Piquet has received personal compensation in the range of $500-$4,999 for serving as an Expert Witness for Falk Waas. The institution of Dr. Piquet has received research support from Rocky Mountain MS Center. The institution of Dr. Piquet has received research support from Roche/Genentech. The institution of Dr. Piquet has received research support from NYU. The institution of Dr. Piquet has received research support from Anokion. The institution of Dr. Piquet has received research support from UCB . The institution of Dr. Piquet has received research support from Foundation for Sarcoidosis. The institution of Dr. Piquet has received research support from Kyverna . Dr. Piquet has received publishing royalties from a publication relating to health care. Dr. Piquet has received publishing royalties from a publication relating to health care. Dr. Piquet has received personal compensation in the range of $10,000-$49,999 for serving as a Litigative Consultant with US-Dept HHS/DICP. Dr. Piquet has a non-compensated relationship as a Medical Advisory Board Member with Autoimmune Encephalitis Alliance (AEA) that is relevant to AAN interests or activities. Dr. Piquet has a non-compensated relationship as a Medical Advisory Board Member with Stiff Person Syndrome Research Foundation (SPSRF) that is relevant to AAN interests or activities.
Jeffrey L. Bennett, MD, PhD, FAAN (University of Colorado School of Medicine) Dr. Bennett has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Amgen. Dr. Bennett has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Alexion. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Genentech. Dr. Bennett has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Roche. Dr. Bennett has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Mitsubishi Tanabe. Dr. Bennett has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Novartis. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Immpact Bio. Dr. Bennett has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Chugai. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Beigene. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Imcyse. Dr. Bennett has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for MIAC. Dr. Bennett has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for CorEvitas. Dr. Bennett has received personal compensation in the range of $50,000-$99,999 for serving on a Speakers Bureau for Alexion. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Vindico. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Touch IME. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Efficient LLC. Dr. Bennett has received personal compensation in the range of $10,000-$49,999 for serving as an Expert Witness for Pavich. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving as an Expert Witness for Marie Bush. Dr. Bennett has received personal compensation in the range of $10,000-$49,999 for serving as an Expert Witness for Marks Gray. Dr. Bennett has received personal compensation in the range of $500-$4,999 for serving as an Expert Witness for Knight, Nicastro, MacKay. The institution of Dr. Bennett has received research support from Alexion. The institution of Dr. Bennett has received research support from Genentech. Dr. Bennett has received intellectual property interests from a discovery or technology relating to health care. Dr. Bennett has received publishing royalties from a publication relating to health care.
Timothy L. Vollmer, MD, FAAN The institution of Dr. Vollmer has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Biogen IDEC. The institution of Dr. Vollmer has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Genentech/Roche. The institution of Dr. Vollmer has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Siranax. The institution of Dr. Vollmer has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Celgene. The institution of Dr. Vollmer has received personal compensation in the range of $500-$4,999 for serving as a Consultant for EMD Serono. The institution of Dr. Vollmer has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Bristol Meyers Squib. The institution of Dr. Vollmer has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Viela Bios. The institution of Dr. Vollmer has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Novartis. The institution of Dr. Vollmer has received research support from Rocky Mountain MS Center. The institution of Dr. Vollmer has received research support from Biogen. The institution of Dr. Vollmer has received research support from Actelion. The institution of Dr. Vollmer has received research support from Genentech/Roche. The institution of Dr. Vollmer has received research support from Anokion. The institution of Dr. Vollmer has received research support from TG Therapeutics.
Salim Chahin, MD (Washington University School of Medicine, Neurology Dept.) Dr. Chahin has received personal compensation in the range of $500-$4,999 for serving as a Consultant for GLG. Dr. Chahin has received personal compensation in the range of $500-$4,999 for serving as a Consultant for EMD Serono. Dr. Chahin has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for TG Therapeutic . The institution of Dr. Chahin has received research support from National MS Society. The institution of Dr. Chahin has received research support from BMS.
Kavita Nair, PhD, FAAN (University of Colorado) Dr. Nair has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Bristol Meyers Squibb. Dr. Nair has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Novartis. Dr. Nair has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for PhRMA Foundation. Dr. Nair has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Genentech. Dr. Nair has received personal compensation in the range of $500-$4,999 for serving as a Consultant for TG Therapeutics. Dr. Nair has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for MJH Lifesciences. Dr. Nair has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Sanofi. Dr. Nair has received personal compensation in the range of $500-$4,999 for serving as a Consultant for EMD Serono. Dr. Nair has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Amgen. Dr. Nair has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Anylam . Dr. Nair has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Applied Patient Experience. Dr. Nair has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Esai. Dr. Nair has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for MHJ Life Sciences. Dr. Nair has received personal compensation in the range of $10,000-$49,999 for serving on a Speakers Bureau for Sanofi-Genzyme. Dr. Nair has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Amgen. Dr. Nair has received personal compensation in the range of $500-$4,999 for serving as an officer or member of the Board of Directors for ICER. The institution of Dr. Nair has received research support from Genentech. The institution of Dr. Nair has received research support from Novartis. The institution of Dr. Nair has received research support from Genentech. The institution of Dr. Nair has received research support from Phrma Foundation. The institution of Dr. Nair has received research support from Bristol Meyers Squibb. The institution of Dr. Nair has received research support from Novartis. The institution of Dr. Nair has received research support from NINDS. The institution of Dr. Nair has received research support from Sanofi Genzyme. The institution of Dr. Nair has received research support from Kyverna Therapeutcis. Dr. Nair has a non-compensated relationship as a Board Member with Center for Improving Value in Healthcare that is relevant to AAN interests or activities.