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Cerebrospinal fluid and serum nitric oxide metabolites in patients with multiple sclerosis

Departments of Clinical Neurology and Neurochemistry, Institute of Neurology, Queen Square, London WC1N 3BG, UK

Nitric oxide is hypothesised to play a role in the immunopathogenesis of multiple sclerosis. Raised cerebrospinal fluid and serum levels of the nitric oxide metabolites nitrate and nitrite have been described in patients with multiple sclerosis. Cerebrospinal fluid and serum nitrate and nitrite were measured in patients with multiple sclerosis, inflammatory and non-inflammatory neurological diseases, and correlated with the albumin quotient, an index of blood-brain-barrier dysfunction. Patients undergoing diagnostic lumbar and vene puncture were prospectively recruited, clinical data were obtained from the hospital records, and the CSF and serum nitrate and nitrite levels were measured by the nitrate reductase and Griess reaction methods. Nitrate and nitrite, were raised in the CSF and serum of patients with multiple sclerosis and other inflammatory neurological diseases compared to patients with non-inflammatory neurological disorders (median nitrate and nitrite: cerebrospinal fluid=10.3 µM vs 15.4 µMvs 6.6 µM, P50.001, and serum=49.0 µM vs 46.4 µM vs 38.8 µM, P=0.02, respectively). CSF nitrate and nitrite levels correlated with the albumin quotient (n=59, r=0.42, P50.001). This study provides further evidence for a role of nitric oxide in the immunopathogenesis of multiple sclerosis and supports a role for nitric oxide as a possible mediator of inflammatory blood-brain-barrier dysfunction.

Key Words: nitric oxide • multiple sclerosis • blood-brain-barrier

Multiple Sclerosis, Vol. 4, No. 1, 27-30 (1998)
DOI: 10.1177/135245859800400107


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