1. Biomarkers of inflammation and axonal degeneration/damage in patients with newly diagnosed multiple sclerosis: contributions of the soluble CD163 CSF/serum ratio to a biomarker panel.
- Author
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Stilund M, Gjelstrup MC, Petersen T, Møller HJ, Rasmussen PV, and Christensen T
- Subjects
- Adolescent, Adult, Aged, Antigens, CD blood, Antigens, CD cerebrospinal fluid, Antigens, Differentiation, Myelomonocytic blood, Antigens, Differentiation, Myelomonocytic cerebrospinal fluid, Area Under Curve, Biomarkers blood, Biomarkers cerebrospinal fluid, Chemokine CXCL13 blood, Chemokine CXCL13 cerebrospinal fluid, Enzyme-Linked Immunosorbent Assay, Female, Humans, Linear Models, Macrophages immunology, Macrophages metabolism, Male, Microglia metabolism, Middle Aged, Multiple Sclerosis cerebrospinal fluid, Multiple Sclerosis, Chronic Progressive cerebrospinal fluid, Multiple Sclerosis, Chronic Progressive diagnosis, Multiple Sclerosis, Relapsing-Remitting cerebrospinal fluid, Multiple Sclerosis, Relapsing-Remitting diagnosis, Neopterin blood, Neopterin cerebrospinal fluid, Osteopontin blood, Osteopontin cerebrospinal fluid, ROC Curve, Receptors, Cell Surface blood, Young Adult, CD163 Antigen, Antigens, CD analysis, Antigens, Differentiation, Myelomonocytic analysis, Axons metabolism, Biomarkers analysis, Inflammation metabolism, Multiple Sclerosis diagnosis, Receptors, Cell Surface analysis
- Abstract
Background: Expression of soluble CD163 (sCD163), a macrophage/microglia biomarker, is increased in inflammatory conditions, and sCD163 levels in the cerebrospinal fluid (CSF) have recently been shown to be elevated in patients with multiple sclerosis (MS): the sCD163 CSF/serum ratio was elevated in patients with relapsing-remitting MS (RRMS), primary progressive MS (PPMS), and clinically isolated syndrome (CIS) compared with symptomatic controls., Objective: To investigate the contributions of the sCD163 CSF/serum ratio to a biomarker panel focusing on inflammation and axonal degeneration in newly diagnosed MS; thus optimising a diagnostic biomarker panel for MS., Methods: After a full MS diagnostic work-up, including collection of paired samples of CSF and serum, 125 patients were included in this study. Patients were divided into groups based on their diagnosis, and patients with normal clinical and paraclinical findings were defined as symptomatic controls. Serum and CSF levels, ratios, and indices of sCD163, CXCL13, osteopontin, neopterin, and CSF levels of neurofilament light polypeptide were determined by enzyme-linked immunosorbent assays (ELISAs). For sCD163 the results constitute a post-hoc analysis of already published data., Results: All tested biomarkers, notably the sCD163 ratio, the CXCL13 ratio, the NEO ratio, the CSF level of NfL, the IgG index, and the serum level of OPN, were significantly correlated to RRMS, PPMS, and/or CIS. The individual biomarkers in single tests had a lower performance than the IgG index, however, their combined receiver operating characteristic (ROC) curve demonstrated excellent diagnostic discriminatory power., Conclusion: The biomarker panel showed distinct profiles for each patient group and could be a valuable tool for clinical differentiation of MS subgroups. The combined ROC analysis showed that sCD163 contributes positively as a diagnostic marker to a panel of established MS biomarkers. Patients with PPMS were demonstrated to have significantly elevated levels of both inflammatory and degenerative markers.
- Published
- 2015
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