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- Ieva Masiulienė, Katryna Pampuščenko, Gintarė Žemgulytė, Diana Bilskienė, Vilmantė Borutaitė, and Renata Balnytė.
- Department of Neurology, Medical Academy, Lithuanian University of Health Sciences, A. Mickeviciaus Str. 9, LT-44307 Kaunas, Lithuania.
- Medicina (Kaunas). 2024 Feb 29; 60 (3).
AbstractBackground and Objectives: Recent findings suggest that neurodegeneration starts early in the course of multiple sclerosis (MS) and significantly contributes to the progression of patients' disability. Tau is a microtubule-binding protein that is known to play a role in the pathophysiology of many neurodegenerative disorders. Newly emerging data on tau protein-induced neurodegenerative processes and its possible involvement in MS suggest that it may be involved in the pathology of early-stage MS. Therefore, this study aimed to test this hypothesis in patients with newly diagnosed MS. Materials and Methods: Cerebrospinal fluid (CSF) was collected from 19 patients with newly diagnosed MS and 19 control subjects. All MS patients underwent neurological examination, lumbar punction, and brain magnetic resonance imaging (MRI). CSF concentrations of total and phosphorylated tau (phospho-tau-181) protein were measured using commercial enzyme-linked immunosorbent assay kits. Results: The total tau concentration was significantly higher in the CSF of MS patients compared to controls (141.67 pg/mL, IQR 77.79-189.17 and 68.77 pg/mL, IQR 31.24-109.17, p = 0.025). In MS patients, the total tau protein positively correlated with total CSF protein (r = 0.471, p = 0.048). Significantly higher total tau concentration was measured in MS patients with higher lesion load in brain MRI (≥9 versus <9 lesions; 168.33 pg/mL, IQR 111.67-222.32 and 73.33 pg/mL, IQR -32.13-139.29-, p = 0.021). The CSF concentration of phospho-tau-181 protein was below the detection limit in both MS and control subjects. Conclusions: The concentration of total tau protein level is elevated, whereas phospho-tau-181 is undetectable in the CSF of patients with early-stage MS.
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