title: Elevation of CSF tumor necrosis factor alpha levels in new daily persistent headache and treatment refractory chronic migraine.
abstract: OBJECTIVE
  To determine if patients with new daily persistent headache (NDPH) have elevated levels of tumor necrosis factor alpha (TNF alpha) in the CSF.
  
  
  BACKGROUND
  NDPH is considered one of the most treatment resistant of all headache syndromes. This reflects a lack of understanding of its pathogenesis. As a certain percentage of NDPH patients have their headaches start after an infection, the possibility of a persistent state of systemic or CNS inflammation comes into question. TNF alpha is a proinflammatory cytokine involved in brain immune and inflammatory activities, as well as in pain initiation. The goal of this study was to look at TNF alpha levels in the CSF of NDPH patients, to determine if CNS inflammation may play some role in the pathogenesis of this condition.
  
  
  METHODS
  CSF TNF alpha levels were studied in 38 patients: 20 with NDPH and a control population of 16 patients with chronic migraine (CM), and 2 with post-traumatic headache (PT).
  
  
  RESULTS
  CSF TNF alpha levels were elevated in 19 of 20 NDPH patients, 16 of 16 CM patients, and both PT patients. Serum TNF alpha levels were normal in most of the study subjects.
  
  
  CONCLUSIONS
  An elevation of CSF TNF alpha levels was found in almost all NDPH patients and suggest a role for TNF alpha in the pathogenesis of this condition. Surprisingly, all CM and PT patients tested had elevated CSF TNF alpha levels. In most patients with elevated CSF levels, serum TNF alpha levels were normal. All of these syndromes may be manifestations of CNS inflammation. As most of the positive-tested patients showed minimal to no improvement during aggressive inpatient treatment, persistent elevation of CSF TNF alpha levels may be one of the causes of treatment refractory CDH.
authors.affiliation: Michigan Head Pain and Neurological Institute-Neurology, 3120 Professional Drive, Ann Arbor, MI 48104, USA.
authors.forename: Todd
authors.initials: T
authors.lastname: Rozen
authors.forename: Sahar Z
authors.initials: SZ
authors.lastname: Swidan
mesh_terms: D000293:Adolescent; D000328:Adult; D015415:Biomarkers / Q000134:cerebrospinal fluid; D002908:Chronic Disease; D005260:Female; D006261:Headache / Q000134:cerebrospinal fluid* / Q000503:physiopathology; D006801:Humans; D007297:Inpatients; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000134:cerebrospinal fluid* / Q000503:physiopathology; D012016:Reference Values; D014409:Tumor Necrosis Factor-alpha / Q000134:cerebrospinal fluid*
chemical_list: D015415:Biomarkers; D014409:Tumor Necrosis Factor-alpha