title: Is there a role for nitric oxide activity in cervicogenic headache?
abstract: Cervicogenic headache (CEH) is a unilateral headache that can be provoked by neck movement, awkward head positions or pressure on tender points in the neck. The mechanisms underlying the stimulation of pain in CEH are not clearly known. In this study, we measured serum nitrate and nitrite levels as an index of nitric oxide (NO) activity in 15 patients with CEH during headache and headache-free periods and in 15 healthy controls. Total nitrate+nitrite levels were found to be higher in CEH patients during headache periods than in healthy controls (20.7+/-3.8 micromol/l vs 14.4+/-3.6 micromol/l, p<0.001), but not in CEH patients during headache-free periods (16.1+/-2.2 micromol/l) compared with the controls (p>0.05). In the patients with CEH, serum total nitrate+nitrite levels were found to be higher during headache periods than during headache-free periods (p=0.001). It can thus be hypothesized that the changes observed are a cause of the attack rather than a consequence of the disease process.
authors.affiliation: Department of Anesthesiology, Ankara Training and Research Hospital, Turkey. nurteninan@yahoo.com
authors.forename: Nurten
authors.initials: N
authors.lastname: Inan
authors.forename: Gulsen
authors.initials: G
authors.lastname: Yilmaz
authors.forename: Hatice
authors.initials: H
authors.lastname: Surer
authors.forename: Ozlem
authors.initials: O
authors.lastname: Coskun
authors.forename: Serap
authors.initials: S
authors.lastname: Ucler
authors.forename: Leyla
authors.initials: L
authors.lastname: Cavdar
authors.forename: Levent E
authors.initials: LE
authors.lastname: Inan
mesh_terms: D000328:Adult; D006801:Humans; D008875:Middle Aged; D009566:Nitrates / Q000097:blood; D009569:Nitric Oxide / Q000378:metabolism*; D009573:Nitrites / Q000097:blood; D051298:Post-Traumatic Headache / Q000097:blood / Q000378:metabolism / Q000503:physiopathology*
chemical_list: D009566:Nitrates; D009573:Nitrites; D009569:Nitric Oxide