title: A rat model of pontine hemorrhage.
abstract: Approximately 15% of all strokes are due to intracerebral hemorrhage, and of these, 5 to 9% will occur in the pons, with mortality approximately 60% of the time. However, there is not an adequate animal model to fully address this important clinical problem. To this end, pontine hemorrhage was induced in rats using stereotaxic injection of 0.15 units of collagenase. At 24, 48, and 72h (n = 4 per group), the hemorrhagic volume, brain water content, body temperature, and neurological function (corner turn, inclined plane, and neurological deficit score) were assessed. All tested parameters were significantly increased, compared to sham, without any differences between time points. Furthermore, the extent of brainstem edema was highly correlated with neurological score, inclined plane, and body temperature. This new pontine hemorrhage rat model demonstrated brain edema and neurological deficits, and can be used to test treatment strategies for pontine hemorrhage.
authors.affiliation: Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA 92354, USA.
authors.forename: T
authors.initials: T
authors.lastname: Lekic
authors.forename: J
authors.initials: J
authors.lastname: Tang
authors.forename: J H
authors.initials: JH
authors.lastname: Zhang
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001929:Brain Edema / Q000209:etiology; D002543:Cerebral Hemorrhage / Q000139:chemically induced / Q000150:complications* / Q000473:pathology*; D017364:Collagenases; D004195:Disease Models, Animal; D008297:Male; D009422:Nervous System Diseases / Q000209:etiology; D009460:Neurologic Examination / Q000379:methods; D011149:Pons / Q000473:pathology / Q000503:physiopathology*; D011597:Psychomotor Performance / Q000502:physiology; D051381:Rats; D017207:Rats, Sprague-Dawley; D013053:Spectrophotometry / Q000379:methods; D013997:Time Factors
chemical_list: D017364:Collagenases