title: Effect of cilostazol on delayed cerebral vasospasm after subarachnoid hemorrhage in rats: evaluation using black blood magnetic resonance imaging.
abstract: The purpose of this study was to use black blood magnetic resonance imaging (BB-MRI) to assess delayed cerebral vasospasm (DCV) after subarachnoid hemorrhage (SAH) in rats, and evaluate whether delayed treatment with the anti-platelet agent cilostazol was effective on DCV. BA vasospasm was sequentially assessed at 1, 2, and 3 h, and 1-6 days after SAH by BB-MRI. BB-MRI clearly visualized biphasic vasospasm; early vasospasm at 1 h later and the maximal DCV at day 2. Cilostazol was perorally administered twice at day 1 after having confirmed significant DCV using BB-MRI. The effect of cilostazol on DCV was evaluated at day 2. Cilostazol significantly attenuated DCV and suppressed the levels of malondialdehide and 8-isoprostane in CSF after SAH. This study shows that BB-MRI is a useful and less invasive method for the evaluation of DCV, and cilostazol may be effective on DCV.
authors.affiliation: Free Radical Research Institute, Otsuka Pharmaceutical Co., Ltd., Kawauchi-cho, Tokushima, Japan. h_ito@research.otsuka.co.jp
authors.forename: Hideki
authors.initials: H
authors.lastname: Ito
authors.forename: Mari
authors.initials: M
authors.lastname: Fukunaga
authors.forename: Hidenori
authors.initials: H
authors.lastname: Suzuki
authors.forename: Goro
authors.initials: G
authors.lastname: Miyakoda
authors.forename: Makoto
authors.initials: M
authors.lastname: Ishikawa
authors.forename: Youichi
authors.initials: Y
authors.lastname: Yabuuchi
authors.forename: Waro
authors.initials: W
authors.lastname: Taki
mesh_terms: D000818:Animals; D000077407:Cilostazol; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D013345:Subarachnoid Hemorrhage / Q000150:complications / Q000188:drug therapy* / Q000503:physiopathology*; D013777:Tetrazoles / Q000627:therapeutic use*; D013997:Time Factors; D020301:Vasospasm, Intracranial / Q000188:drug therapy* / Q000209:etiology / Q000503:physiopathology*
chemical_list: D013777:Tetrazoles; D000077407:Cilostazol