Serum neurofilament light chain levels are correlated with the infarct volume in patients with acute ischemic stroke

June Woo Ahn, Jaechun Hwang, Myunghoon Lee, Jae Hyoung Kim, Hee-Jin Cho, Ho-Won Lee, Mi-Yeon Eun, June Woo Ahn, Jaechun Hwang, Myunghoon Lee, Jae Hyoung Kim, Hee-Jin Cho, Ho-Won Lee, Mi-Yeon Eun

Abstract

Neurofilament light chains (NfLs) are promising biomarkers of neuroaxonal damage in stroke patients. We investigated the correlations between NfL levels and infarct volume, initial stroke severity, and functional outcomes at discharge in patients with acute ischemic stroke. We prospectively included 15 patients with first-ever acute ischemic stroke and 8 age- and sex-matched healthy controls without other neurological disorders. Serum NfL levels were measured using the single-molecule array (Simoa) technique twice within 24 hours of admission (NfL1D) and on the seventh hospital day (NfL7D) in patients with stroke and once in healthy controls. We assessed the infarct volume on diffusion-weighted magnetic resonance imaging using the free software ITK-SNAP. Serum NfL1D levels in stroke patients were significantly higher (28.4 pg/mL; interquartile range [IQR], 43.0) than in healthy controls (14.5 pg/mL; IQR, 3.2; P = .005). Temporal pattern analyses demonstrated that NfL7D levels were increased (114.0 pg/mL; IQR, 109.6) compared to NfL1D levels in all stroke patients (P = .001). There was a strong correlation between NfL7D levels and infarct volume (R = 0.67, P = .007). The difference between NfL1D and NfL7D (NfLdiff levels) was strongly correlated with the infarct volume (R = 0.63; P = .013). However, there was no statistically significant correlation between NfL levels and the initial stroke severity or functional outcomes at discharge. NfL levels in the subacute stage of stroke and the NfL difference between admission and 7th day of hospital were correlated with infarct volume in patients with acute ischemic stroke.

Conflict of interest statement

The authors have no conflicts of interest to disclose.

Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.

Figures

Figure 1.
Figure 1.
Selection of patient population with acute ischemic stroke.
Figure 2.
Figure 2.
Serum NfL levels in the study population. (A) NfL levels in healthy controls and patients with acute ischemic stroke (HD 1 and HD 7) using the Mann–Whitney U-test. (B) Temporal pattern of NfL levels in every patient using the Wilcoxon signed-rank test. HD = hospital day, NfL = neurofilament light chain, NfLHC = neurofilament light chain in healthy controls, NfL1D = neurofilament light chain within 24 h of admission in patients, NfL7D = neurofilament light chain on the seventh hospital day.
Figure 3.
Figure 3.
Correlation between serum NfL levels and infarct volume, initial NIHSS score, and discharge mRS. Analysis was conducted using Spearman rank correlation analysis. * means P < .05; ** means P < .01; *** means P < .001. NfL = neurofilament light chain, NIHSS = National Institutes of Health Stroke Scale, mRS = modified rankin scale.

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Source: PubMed

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