The Neuroprotective Effects of Isosteviol against Focal Cerebral Ischemia Injury Induced by Middle Cerebral Artery Occlusion in Rats

No Thumbnail Available
File version
Author(s)
Xu, D
Du, W
Zhao, L
Davey, AK
Wang, J
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2008
Size
File type(s)
Location
License
Abstract

Occlusion of a cerebral artery impairs blood flow leading to neuronal death. Reperfusion of the tissue is associated with inflammation, increased reactive oxygen species, necrosis and apoptosis. Hence, damage to the brain will continue even after the blood flow is restored. Isosteviol has been demonstrated to have protective effects against ischemia-reperfusion (IR) injury in the rat heart and the current study was undertaken to determine whether it is also effective in preventing IR injury in the brain. Rats were divided into six groups: a sham-operation control group and 5 IR groups that were pre-treated with either isosteviol 5 mg竧-1, 10 mg竧-1, 20 mg竧-1, nimodipine 5 mg竧-1, or saline. Cerebral ischemia was induced for 2 hours. Twenty-two hours after re-perfusion the rats were assessed for neurobehavioral deficit, infarct volume, histological changes, and malondialdehyde, superoxide dismutase (SOD), Bcl-2 and NF-?B levels in brain tissue. Pre-treatment with isosteviol reduced infarct volume, ameliorated cell death and infiltration of neutrocytes, improved neuro-locomotor activity, increased SOD activity, induced Bcl-2, suppressed lipid superoxidation and the expression of NF-?B, and therefore retarded necrosis and apoptosis of neurons and inflammation. These positive effects were dose-dependent with an isosteviol dose of 20 mg竧-1, thus being as effective as nimodipine.

Journal Title

Planta Medica

Conference Title
Book Title
Edition
Volume

74

Issue

8

Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Plant biology

Traditional, complementary and integrative medicine

Pharmacology and pharmaceutical sciences

Basic pharmacology

Persistent link to this record
Citation
Collections