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Increased Osteopontin Levels in the Cerebrospinal Fluid of Patients With Multiple Sclerosis
Manjit Braitch, MS;
Robert Nunan, MS;
Graham Niepel, BM, ChB, MRCP;
Laura J. Edwards, BM, ChB, MRCP;
Cris S. Constantinescu, MD, PhD
Arch Neurol. 2008;65(5):633-635.
Objective To determine cerebrospinal fluid levels of osteopontin (OPN), a proinflammatory cytokine that was found to be overexpressed in multiple sclerosis lesions and increased in plasma during relapses and in secondary progressive multiple sclerosis.
Design Case series. Osteopontin, interleukin 12p40 (IL-12p40), IL-10, and matrix metalloproteinase 9 were measured by enzyme-linked immunosorbent assay by an investigator unaware of the patients' diagnoses.
Patients Consecutive patients with multiple sclerosis (n = 27), or other inflammatory (n = 11) or non-inflammatory (n = 23) neurological diseases, undergoing lumbar puncture, were investigated.
Results Osteopontin was significantly elevated in the cerebrospinal fluid of patients with multiple sclerosis (mean [SD], 415 [186] ng/mL) and other inflammatory diseases (563 [411] ng/mL) compared with those with noninflammatory neurological diseases (286 [150] ng/mL). Cerebrospinal fluid OPN levels were slightly higher than plasma OPN levels. Cerebrospinal fluid OPN levels positively correlated with the ability to detect cerebrospinal fluid IL-12p40.
Conclusion Osteopontin in the cerebrospinal fluid may be, in part, of central nervous system origin, and may play an important role in central nervous system inflammation.
Author Affiliations: Division of Clinical Neurology, University of Nottingham, Queen's Medical Centre, Nottingham, England.
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