title: Specificity and correlation with disease activity of cerebrospinal fluid osteopontin levels in patients with multiple sclerosis.
abstract: BACKGROUND
  Despite recent advances in therapy that have improved the overall disease course in multiple sclerosis (MS), the prognosis at the outset remains unpredictable.
  
  
  OBJECTIVE
  To investigate whether cerebrospinal fluid (CSF) osteopontin levels correlate with disability or active disease in MS and to determine whether elevated CSF osteopontin levels are only seen in MS.
  
  
  METHODS
  Cerebrospinal fluid osteopontin was assayed using enzyme-linked immunosorbent assay in duplicate by an observer blinded to the clinical status of the sample. Cerebrospinal fluid samples were not obtained from any patient who had received high-dose corticosteroid therapy in the month before analysis.
  
  
  METHODS
  Medical research institute.
  
  
  METHODS
  Thirty patients (18 women and 12 men; age range, 24-71 years) with clinically definite MS and 36 patients (22 women and 14 men; age range, 20-71 years) with other neurological diseases (ONDs) or nonneurological illnesses were included in the study.
  
  
  METHODS
  Disease activity for patients with MS was based on observations in the year preceding the study, including the number of relapses, the change in disability according to the Expanded Disability Status Scale, and increased T2-weighted or gadolinium-enhancing lesions on brain magnetic resonance imaging.
  
  
  RESULTS
  Higher CSF osteopontin levels were seen in patients with MS having active disease and in patients with ONDs that are actively deteriorating or inflammatory. However, CSF osteopontin levels in patients with MS did not correlate with disability status.
  
  
  CONCLUSIONS
  Cerebrospinal fluid osteopontin levels do not correlate with disability in MS but tend to be higher in patients with active disease. Elevated CSF osteopontin levels are not a specific marker for MS, as they are found in patients with ONDs and nonneurological illnesses. In ONDs, the highest CSF osteopontin levels are seen in patients with rapidly progressive neurological dysfunction or widespread inflammation of the central nervous system.
authors.affiliation: Multiple Sclerosis Research Center of New York, 521 W 57th Street, New York, NY 10019, USA.
authors.forename: Soheli A
authors.initials: SA
authors.lastname: Chowdhury
authors.forename: Jerry
authors.initials: J
authors.lastname: Lin
authors.forename: Saud A
authors.initials: SA
authors.lastname: Sadiq
mesh_terms: D000328:Adult; D000368:Aged; D015415:Biomarkers / Q000134:cerebrospinal fluid; D001921:Brain / Q000473:pathology; D003287:Contrast Media; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005682:Gadolinium; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000134:cerebrospinal fluid* / Q000473:pathology / Q000503:physiopathology*; D009422:Nervous System Diseases / Q000134:cerebrospinal fluid; D053495:Osteopontin / Q000134:cerebrospinal fluid*; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity
chemical_list: D015415:Biomarkers; D003287:Contrast Media; D053495:Osteopontin; D005682:Gadolinium