Effect of Rat Strain Stereotactic Coordinates on Infarct Volume

Ischemic stroke makes up 87% of all hospital-admitted stroke cases annually; the primary treatment for these cases is intravenous administration of tPA within a 3.5 hour window from stroke onset. A long-term delayed ischemic stroke treatment proposed by this study was a combination of the pharmaceuticals Fluoxetine (SSRI), Simvastatin (statin), and ascorbic acid (Vitamin C). 51 adult rat subjects (10-12 months of age; 44 Sprague Dawley, 7 Long Evans) were given a combination of the drugs for 31 days. Drugs were given through voluntary oral administration via sugar cookie-dough balls to reduce inhibition of neurogenesis through stress-related glucocorticoid production. Drug combinations were as follows: FSA - 5 mg/kg fluoxetine, 0.5 mg/kg simvastatin and 20 mg/kg ascorbic acid; FS - 5 mg/kg fluoxetine, 0.5 mg/kg simvastatin; and the vehicle control. Endothelin-induced cortical stroke was administered using 2 different set of coordinates relative to bregma: Group 1 - (AP: 0.0 mm, ML: -2.5 mm) and (AP +1.5 mm; ML: -2.5 mm); Group 2 - (AP: 0.0 mm, ML: -2.5mm) and (AP +2.3; ML -2.5 mm). To analyze functional deficit, rats were subject to Montoya Staircase functional test once pre-stroke and twice post-stroke, and the Forelimb Asymmetry functional test once pre-stroke and thrice post-stroke. Results showed that Long Evans rats sustain a significantly larger infarct volume compared to Sprague Dawley rats using Group 2 coordinates; Group 1 cortical injection coordinates produced a larger infarct than Group 2 coordinates in FSA Sprague Dawley rats; drug treatment showed no effect on total infarct volume, however, this may be attributed to use of generic fluoxetine in Group 2 Sprague Dawley rats.

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Anatomy

Grantor dc:publisher

Wright State University

Year dc:date

2013

Author dc:creator

• Sanghvi, Saagar K.

Contributors dc:contributor

• Corbett, Adrian

• Neurosciences
• Neurology
• Neurobiology
• Physiology
• Anatomy and Physiology
• stroke
• infarct volume
• rat strain
• Montoya Staircase
• ischemia
• fluoxetine
• simvastatin
• sub-ventricular zone
• stereotaxic coordinates

Statement dc:rights

• unrestricted
• This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.

Language dc:language

English

Repository record dc:identifier

http://rave.ohiolink.edu/etdc/view?acc_num=wright1364484571

OAI identifier oai:identifier

oai:etd.ohiolink.edu:wright1364484571