Cited by 726Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration Mechanisms

Association Between Longitudinal Plasma Neurofilament Light and Neurodegeneration in Patients With Alzheimer Disease

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Mattsson, Niklas, Cullen, Nicholas C., Andreasson, Ulf, Zetterberg, Henrik, Blennow, Kaj·2019·JAMA Neurology

Abstract

Importance: Plasma neurofilament light (NfL) has been suggested as a noninvasive biomarker to monitor neurodegeneration in Alzheimer disease (AD), but studies are lacking. Objective: To examine whether longitudinal plasma NfL levels are associated with other hallmarks of AD. Design, Setting, and Participants: This North American cohort study used data from 1583 individuals in the multicenter Alzheimer's Disease Neuroimaging Initiative study from September 7, 2005, through June 16, 2016. Patients were eligible for inclusion if they had NfL measurements. Annual plasma NfL samples were collected for up to 11 years and were analyzed in 2018. Exposures: Clinical diagnosis, Aβ and tau cerebrospinal fluid (CSF) biomarkers, imaging measures (magnetic resonance imaging and fluorodeoxyglucose-positron emission tomography), and tests on cognitive scores. Main Outcomes and Measures: The primary outcome was the association between baseline exposures (diagnosis, CSF biomarkers, imaging measures, and cognition) and longitudinal plasma NfL levels, analyzed by an ultrasensitive assay. The secondary outcomes were the associations between a multimodal classification scheme with Aβ, tau, and neurodegeneration (ie, the ATN system) and plasma NfL levels and between longitudinal changes in plasma NfL levels and changes in the other measures. Results: Of the included 1583 participants, 716 (45.2%) were women, and the mean (SD) age was 72.9 (7.1) years; 401 had no cognitive impairment, 855 had mild cognitive impairment, and 327 had AD dementia. The NfL level was increased at baseline in patients with mild cognitive impairment and AD dementia (mean levels: cognitive unimpairment, 32.1 ng/L; mild cognitive impairment, 37.9 ng/L; and AD dementia, 45.9 ng/L; P < .001) and increased in all diagnostic groups, with the greatest increase in patients with AD dementia. A longitudinal increase in NfL level correlated with baseline CSF biomarkers (low Aβ42 [P = .001], high total tau [P = .02], and high phosphorylated tau levels [P = .02]), magnetic resonance imaging measures (small hippocampal volumes [P < .001], thin regional cortices [P = .009], and large ventricular volumes [P = .002]), low fluorodeoxyglucose-positron emission tomography uptake (P = .01), and poor cognitive performance (P < .001) for a global cognitive score. With use of the ATN system, increased baseline NfL levels were seen in A-T+N+ (P < .001), A+T-N+ (P < .001), and A+T+N+ (P < .001), and increased rates of NfL levels were seen in A-T+N- (P = .009), A-T+N+ (P = .02), A+T-N+ (P = .04), and A+T+N+ (P = .002). Faster increase in NfL levels correlated with faster increase in CSF biomarkers of neuronal injury, faster rates of atrophy and hypometabolism, and faster worsening in global cognition (all P < .05 in patients with mild cognitive impairment; associations differed slightly in cognitively unimpaired controls and patients with AD dementia). Conclusions and Relevance: The findings suggest that plasma NfL can be used as a noninvasive biomarker associated with neurodegeneration in patients with AD and may be useful to monitor effects in trials of disease-modifying drugs.

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Crossref · 10.1001/jamaneurol.2019.0765

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  • Biomarkers of neurodegeneration (hippocampal atrophy, medial cortex thinning, low FDG-PET glucose uptake, raised CSF neurofilament light) are more closely associated temporally with cognitive decline than amyloid and tau fluid biomarkers.

    “Biomarkers of neurodegeneration, such as hippocampal atrophy, medial cortex thinning, low glucose uptake on fluorodeoxyglucose (FDG)-PET, or raised CSF neurofilament light (NFL- a non-specific marker of neurodegeneration), are more closely associated temporally with cognitive decline than amyloid and tau fluid biomarkers.(444)”

    From Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission (2024) · cites this paper as [444]

    The Abstract and Discussion (pages unavailable) report that neurofilament light tracks worsening cognition and atrophy, and the paper measures hippocampal volume, cortical thickness, and FDG-PET uptake. But its longitudinal neurofilament findings concern plasma, not CSF, and it does not establish that these neurodegeneration markers are more closely associated in time with cognitive decline than amyloid and tau fluid biomarkers. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • NfL in blood shows a clear increase in AD and tracks neurofibrillary tangle load and cognitive decline.

    “Whereas blood t-tau shows no diagnostic potential for AD, 13 NfL in blood shows a clear increase in AD, 4 and also tracks neurofibrillary tangle load and cognitive decline.14,15”

    From Plasma Tau and Neurofilament Light in Frontotemporal Lobar Degeneration and Alzheimer Disease (2021) · cites this paper as [15]

    The Abstract and Discussion report that changes in plasma NfL correlate with worsening cognition, and the Abstract reports associations with CSF tau biomarkers. The paper does not report measuring neurofibrillary tangle load, so the claim that NfL tracks tangle load is not established by this source. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • In Alzheimer disease, elevated plasma neurofilament light tracks with quicker global cognitive decline and faster atrophy.

    “This study also replicated the findings of previous investigations supporting that, in AD, high plasma NfL correlates with faster worsening in global cognition and faster atrophy rates.4,15”
  • Several studies have demonstrated that plasma Aβ40, Aβ42, P-tau and NfL are to some extent correlated with PET scan and CSF detection results.

    “Several studies have demonstrated that plasma Aβ40, Aβ42, phosphorylated tau (P-tau) and neurofilament light (NfL) are to some extent correlated with PET scan and CSF detection results6–8.”
  • NfL is elevated in AD and provides prognostic insight into ongoing neurodegeneration.

    “In addition, plasma Aβ42/Aβ40 ratios have demonstrated potential for reflecting cerebral amyloid burden88, while NfL, a marker of axonal damage, is elevated in AD and provides prognostic insight into ongoing neurodegeneration89.”

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Authors
Mattsson, N., Cullen, N. C., Andreasson, U., Zetterberg, H., & Blennow, K.
Affiliations
  • Lund University (SE)
  • University of Pennsylvania (US)
  • Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden
  • Sahlgrenska University Hospital (SE)
Corresponding author
Mattsson, Niklas
Venue
JAMA Neurology
Published
2019-07-01
Volume
76
Issue
7
Pages
791
ISSN
2168-6149 (ISSN-L)
OpenAlex
W2938221890
Cited by
726
References
28
Citations by year
2026: 67 · 2025: 113 · 2024: 126 · 2023: 100 · 2022: 84 · 2021: 115 · 2020: 90 · 2019: 30 · 2018: 1
FWCI
63.40
Type
journal article
Language
en
Open access
Locations
  • JAMA Neurology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
  • Greta och Johan Kocks stiftelser
  • National Institutes of Health (5u01ag024904-10)
  • Canadian Institutes of Health Research
  • National Institute on Aging (U01-AG-024904)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
neurofilament light chain, Alzheimer's disease, neurodegeneration, plasma biomarkers, amyloid-beta, tau protein, phosphorylated tau, hippocampal volume, cortical thinning, FDG-PET, mild cognitive impairment, Alzheimer's dementia, longitudinal biomarker changes, neuroimaging biomarkers, cerebrospinal fluid biomarkers, cognitive decline, neuroinflammation
MeSH terms
Mental Status and Dementia Tests, Aged, Aged, 80 and over, Alzheimer Disease, Cerebral Cortex, Cerebral Ventricles, Female, Hippocampus, Humans, Longitudinal Studies, Magnetic Resonance Imaging, Male, Organ Size, Peptide Fragments, Phosphoproteins, Cohort Studies, Biomarkers, Case-Control Studies, Amyloid beta-Peptides, tau Proteins, Neurofilament Proteins, Disease Progression, Radiopharmaceuticals, Fluorodeoxyglucose F18, Positron-Emission Tomography, Cognitive Dysfunction

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