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Ginsenoside Rd attenuates mitochondrial dysfunction and sequential apoptosis after transient focal ischemia
1Department of Neurology, Xijing Hospital, The Fourth Military Medical University, Xi'an, PR China.
Neuroscience
|January 12, 2011
Summary
Ginsenoside Rd (Rd) significantly reduced stroke injury in rats by protecting mitochondria and restoring energy metabolism. This neuroprotective effect was sustained for two weeks, highlighting Rd
Area of Science:
- Neuroscience
- Pharmacology
- Biochemistry
Background:
- Ginsenoside Rd (Rd), a key component of Panax ginseng, shows promise in protecting neuronal cells.
- Cerebral ischemia, a major cause of stroke, leads to significant neuronal damage.
Purpose of the Study:
- To investigate the neuroprotective effects of Ginsenoside Rd (Rd) in an animal model of focal cerebral ischemia.
- To elucidate the underlying mechanisms of Rd's protective action against stroke.
Main Methods:
- Transient middle cerebral artery occlusion (MCAO) model in rats.
- Assessment of infarct volume, neurological function, mitochondrial parameters (enzyme activity, membrane potential, ROS), energy metabolites, and apoptosis markers.
- In vitro studies on isolated mitochondria exposed to calcium.
Main Results:
- Rd (50 mg/kg) reduced infarct volume by 52.8% and improved neurological function.
- Rd preserved mitochondrial function, reduced reactive oxygen species (ROS), and normalized energy metabolites (lactate/pyruvate ratio).
- Rd inhibited mitochondrial calcium-induced damage and apoptosis by preventing cytochrome c and AIF release.
Conclusions:
- Ginsenoside Rd (Rd) demonstrates significant neuroprotective effects in focal cerebral ischemia.
- Rd's mechanism involves integrated mitochondrial protection, energy restoration, and apoptosis inhibition.
- Rd offers a potential therapeutic strategy for stroke treatment.
