Neuroprotective effects of hydroxyethylpuerarin against focal cerebral ischemia-reperfusion in rats
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Updated: Jul 7, 2026
Quantification of Neurovascular Protection Following Repetitive Hypoxic Preconditioning and Transient Middle Cerebral Artery Occlusion in Mice
Published on: May 4, 2015
Zi-Ying Wang1, Xin-Bing Wei, Lin Chen
1Institute of Pharmacology, School of Medicine, Shandong University, Jinan 250012, Shandong, P.R.China.
Abstract:
Our present study was performed to investigate whether hydroxyethylpuerarin (HEP) has a neuroprotective effect on brain injury after focal cerebral ischemia/reperfusion by middle cerebral artery occlusion (MCAO) in adult male Wistar rats. Animals were subjected to one hour of middle cerebral artery occlusion and 48 hours of reperfusion with the pretreatment of drugs (HEP 15, 30, 60 mg/ kg or nimodipine 0.4 mg/kg i.v.) or vehicle. The behavioral tests were used to evaluate the damage to central nervous system. The percentage of brain infarct area was assessed in the brain slices stained with 2% solution of 2, 3, 5-triphenyl tetrazolium chloride (TTC). The pathologic histological changes were observed by H&E staining and the occurrence of apoptosis was determined by flow cytometry. The results showed that pretreatment with HEP at doses of 15, 30, 60 mg/kg exhibited significant neuroprotective effects on rats against focal cerebral ischemia-reperfusion injury by markedly decreasing neurological deficit scores and the percentage of infarct area, reducing necrosis and apoptosis of neurons. All these findings suggest that HEP might provide neuroprotection against focal cerebral ischemia/reperfusion injury probably through its antioxidant and anti-inflammatory property.
Insights
Hydroxyethylpuerarin (HEP) demonstrates significant neuroprotective effects against brain injury caused by focal cerebral ischemia/reperfusion. This compound reduces neurological deficits and neuronal damage, suggesting therapeutic potential.
Area of Science:
- Neuroscience
- Pharmacology
- Ischemic Stroke Research
Background:
- Focal cerebral ischemia/reperfusion injury, often caused by middle cerebral artery occlusion (MCAO), leads to significant neuronal damage.
- Understanding the neuroprotective mechanisms of novel compounds is crucial for developing effective stroke treatments.
Purpose of the Study:
- To investigate the neuroprotective effects of hydroxyethylpuerarin (HEP) in a rat model of focal cerebral ischemia/reperfusion.
- To evaluate the impact of HEP on neurological deficits, infarct size, and neuronal apoptosis.
Main Methods:
- Adult male Wistar rats underwent 1-hour MCAO followed by 48-hour reperfusion.
- Animals were pretreated with varying doses of HEP (15, 30, 60 mg/kg) or nimodipine (0.4 mg/kg).
- Neurobehavioral tests, 2,3,5-triphenyltetrazolium chloride (TTC) staining for infarct area, H&E staining for histology, and flow cytometry for apoptosis were employed.
Main Results:
- HEP pretreatment significantly reduced neurological deficit scores and the percentage of brain infarct area.
- HEP administration decreased neuronal necrosis and apoptosis.
- The neuroprotective effects were observed in a dose-dependent manner.
Conclusions:
- Hydroxyethylpuerarin (HEP) exhibits significant neuroprotective properties against focal cerebral ischemia/reperfusion injury.
- HEP may exert its effects through antioxidant and anti-inflammatory mechanisms.
- HEP shows potential as a therapeutic agent for stroke treatment.
