Abstract
Background and objectives
Blood-based biomarkers and advanced neuroimaging modalities such as magnetic resonance spectroscopy (MRS) or diffusion tensor imaging (DTI) have enhanced our understanding of the pathophysiology of mild traumatic brain injury (mTBI). However, there is limited published data on how blood biomarkers relate to neuroimaging biomarkers post-mTBI.
Methods
To investigate this, 30 patients with mTBI and 21 healthy controls were enrolled. Data was collected at two timepoints postinjury: acute, < 24 h, (blood) and subacute, four-to-six weeks, (blood and imaging). Interleukin (IL) 6 and 10 (inflammation), free thiols (systemic oxidative stress) and neurofilament light (NF-L) (axonal injury) were quantified in plasma. The neurometabolites total N-acetyl aspartate (tNAA) (neuronal energetics), Myo-Inositol (Ins) and total Choline (tCh) (inflammation) and, Glutathione (GSH, oxidative stress) were quantified using MRS.
Results
Concentrations of IL-6 and IL-10 were significantly elevated in the acute phase post-mTBI, while NF-L was elevated only in the subacute phase. Total NAA was lowered in patients with mTBI, although this difference was only nominally significant (uncorrected P < 0.05). Within the patient group, acute IL-6 and subacute tNAA levels were negatively associated (r = − 0.46, uncorrected-P = 0.01), albeit not at a threshold corrected for multiple testing (corrected-P = 0.17). When age was added as a covariate a significant increase in correlation magnitude was observed (ρ = − 0.54, corrected-P = 0.03).
Conclusion
This study demonstrates potential associations between the intensity of the inflammatory response in the acute phase post-mTBI and neurometabolic perturbations in the subacute phase. Future studies should assess the longitudinal dynamics of blood-based and imaging biomarkers after injury.
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Data availability
The data that support the findings of this study are available on reasonable request to the corresponding author.
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Acknowledgements
We would like to sincerely thank Marian L.C. Bulthuis and Marjan Reinders-Luinge for their valuable technical assistance.
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KV: Conceptualization, Methodology, Formal analysis, Data Curation, Writing—Original Draft, Writing—Review and Editing. MEDK: Conceptualization, Investigation, Writing—Review and Editing. DC: Conceptualization, Writing—Review and Editing. MGJK: Investigation, Writing—Review and Editing. AJS-K: Investigation, Writing—Review and Editing. ARB: Conceptualization, Writing—Review and Editing, Supervision. HVG: Conceptualization, Writing—Review and Editing, Supervision. JVDN: Conceptualization, Writing—Review and Editing, Supervision. HJVDH: Conceptualization, Methodology, Formal analysis, Investigation, Writing—Review and Editing, Supervision.
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The AIM-TBI study was approved by the Medical Ethical Committee of the UMCG (METc 2018/681), and all participants provided written informed consent. All study procedures were performed in accordance with the declaration of Helsinki.
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Visser, K., de Koning, M.E., Ciubotariu, D. et al. An exploratory study on the association between blood-based biomarkers and subacute neurometabolic changes following mild traumatic brain injury. J Neurol 271, 1985–1998 (2024). https://doi.org/10.1007/s00415-023-12146-7
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DOI: https://doi.org/10.1007/s00415-023-12146-7