Endothelin B receptor agonist, IRL-1620, reduces neurological damage following permanent middle cerebral artery occlusion in rats

2011 ◽  
Vol 1420 ◽  
pp. 48-58 ◽  
Author(s):  
Mary G. Leonard ◽  
Seema Briyal ◽  
Anil Gulati
Keyword(s):  
Middle Cerebral Artery ◽  
Middle Cerebral Artery Occlusion ◽  
Cerebral Artery ◽  
Receptor Agonist ◽  
Artery Occlusion ◽  
Neurological Damage ◽  
Endothelin B Receptor ◽  
Endothelin B ◽  
Cerebral Artery Occlusion

GABAergic contribution to rat bladder hyperactivity after middle cerebral artery occlusion

2000 ◽  
Vol 279 (4) ◽  
pp. R1230-R1238 ◽  
Author(s):  
Sayoko Kanie ◽  
Osamu Yokoyama ◽  
Kazuto Komatsu ◽  
Koichi Kodama ◽  
Satoshi Yotsuyanagi ◽  
...  
Keyword(s):  
Middle Cerebral Artery ◽  
Middle Cerebral Artery Occlusion ◽  
Cerebral Artery ◽  
Receptor Agonist ◽  
Bladder Capacity ◽  
Artery Occlusion ◽  
Female Rats ◽  
Left Middle Cerebral Artery ◽  
Urethral Pressure ◽  
Cerebral Artery Occlusion

To evaluate the influences of γ-aminobutyric acid (GABA) mechanisms on bladder hyperactivity after left middle cerebral artery occlusion, cystometric recordings were obtained from unanesthetized female rats. Intracerebroventricular administration of both muscimol (GABAA receptor agonist; 0.1–10 nmol) and baclofen (GABAB receptor agonist; 0.1–3 nmol) produced dose-dependent inhibitions of micturition with increases in bladder capacity (BC). The effects of high doses (1–10 nmol) were similar in sham-operated (SO) and cerebral-infarcted (CI) rats. However, lower doses of muscimol (0.1 or 0.3 nmol) and baclofen (0.1 nmol) reduced BC in CI rats. After bicuculline (GABAA receptor antagonist; 1 or 3 nmol) administration, BC in both SO and CI rats first decreased and subsequently increased. An increase in urethral pressure was observed after administration of bicuculline (3 nmol) but not with either muscimol or baclofen. Infarct volumes in muscimol-, bicuculline-, or baclofen-treated rats were not significantly different from those of vehicle-treated rats. These results suggest that GABAergic mechanisms inhibit the micturition reflex at the supraspinal level but that this can change as a result of CI.

scholarly journals Neuroprotective Efficacy of Repinotan HCl, a 5-HT1A Receptor Agonist, in Animal Models of Stroke and Traumatic Brain Injury

2005 ◽  
Vol 25 (4) ◽  
pp. 451-459 ◽  
Author(s):  
Frank Mauler ◽  
Ervin Horváth
Keyword(s):  
Animal Models ◽  
Middle Cerebral Artery ◽  
Middle Cerebral Artery Occlusion ◽  
Cerebral Artery ◽  
Receptor Agonist ◽  
Infarct Volume ◽  
Artery Occlusion ◽  
Occlusion Model ◽  
Neuroprotective Efficacy ◽  
Cerebral Artery Occlusion

Repinotan is a highly potent 5-HT1A receptor agonist with strong neuroprotective efficacy in animal models of middle cerebral artery occlusion and traumatic brain injury. In this study, we characterized the time window for neuroprotective effects of repinotan in animal models. In the permanent middle cerebral artery occlusion model, repinotan showed neuroprotective efficacy when administered as a triple bolus injection (0.3–100 μg/kg) or an intravenous infusion (0.3–100 μg/kg per hour). A 73% reduction in infarct volume was observed with a 3 μg/kg intravenous bolus, and a 65% reduction was observed with a 3 and 10 μg/kg per hour intravenous infusion. When delayed until 5 hours after occlusion, repinotan (10 μg/kg per hour) reduced infarct volume by 43%. In the transient middle cerebral artery occlusion model, repinotan (10 μg/kg per hour) administered immediately after occlusion reduced infarct volume by 97%, and a delay to 5 hours reduced infarct volume by 81%. In the acute subdural hematoma model, repinotan (3 and 10 μg/kg per hour) reduced infarct volume by 65%. In this model, repinotan (3 μg/kg per hour) administered 5 hours after occlusion reduced infarct volume by 54%. The favorable neuroprotective efficacy, broad dose–response curve, and prolonged therapeutic window observed in all models strongly suggest that repinotan is a promising candidate for treating acute ischemic stroke in humans.

Expression of neurocan after transient middle cerebral artery occlusion in adult rat brain

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S217-S217
Author(s):  
Kentaro Deguchi ◽  
Mikiro Takaishi ◽  
Takeshi Hayashi ◽  
Atsuhiko Oohira ◽  
Shoko Nagotani ◽  
...  
Keyword(s):  
Middle Cerebral Artery ◽  
Rat Brain ◽  
Middle Cerebral Artery Occlusion ◽  
Cerebral Artery ◽  
Artery Occlusion ◽  
Adult Rat ◽  
Adult Rat Brain ◽  
Cerebral Artery Occlusion

scholarly journals Dendritic Cells Are Present in Ischemic Brain After Permanent Middle Cerebral Artery Occlusion in the Rat

Stroke ◽  
2002 ◽  
Vol 33 (4) ◽  
pp. 1129-1134 ◽  
Author(s):  
Nikolaos Kostulas ◽  
Hu-Lun Li ◽  
Bao-Guo Xiao ◽  
Yu-Min Huang ◽  
Vasilios Kostulas ◽  
...  
Keyword(s):  
Dendritic Cells ◽  
Middle Cerebral Artery ◽  
Middle Cerebral Artery Occlusion ◽  
Cerebral Artery ◽  
Artery Occlusion ◽  
Ischemic Brain ◽  
Cerebral Artery Occlusion
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