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Updated: May 13, 2025
Assessment of Memory Function in Pilocarpine-induced Epileptic Mice
Published on: June 4, 2020
Dihydromyricetin mitigates epilepsy and cognitive impairment via NLRP3 inhibition in rats
Qing Li1, Zhenzhen Qu1, Zhuofeng Mao1
1Department of Neurology, Key Laboratory of Neurology of Hebei Province, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China.
Introduction:
The nucleotide-binding domain leucine-rich repeat-containing family pyrin domain-containing 3 (NLRP3) inflammasome has been implicated in numerous neurological disorders, including epilepsy, through its role in inflammation and pyroptosis. Dihydromyricetin (DHM) has neuroprotective effects in patients with neurological disorders. However, the impact of DHM on the NLRP3 inflammasome pathway in epilepsy and related cognitive impairment is yet to be fully understood. Herein, we evaluated whether DHM can alleviate pilocarpine-induced neuronal injury and learning and memory disorders in the hippocampal body of rats by regulating the NLRP3 inflammasome.
Material And Methods:
An epileptic rat model was established, and spontaneous recurrent seizure (SRS) frequency and duration were recorded. The function of hippocampal pyramidal neurons was evaluated using Nissl staining. Western blotting, real-time reverse transcription polymerase chain reaction and enzyme-linked immunosorbent assays were used to detect changes in NLRP3 inflammatory pathway-related factors in the hippocampus. Cognitive function was verified using the Morris water maze test, hippocampal late-phase long-term potentiation recording and associated synaptic protein expression assessment.
Results:
Treatment with DHM after status epilepticus (SE) induction decreases the frequency and length of SRS in rats receiving pilocarpine, suggesting that DHM has the potential to improve long-term potentiation and cognitive deficits after SE induction in rats. Additionally, after inducing SE in rats, DHM raises the expression of synaptic proteins. It may prevent harm to hippocampal pyramidal neurons, and DHM-induced neuroprotection may contribute to the pyroptosis associated with NLRP3 in epileptic rats. DHM guards against harm to hippocampus pyramidal neurons.
Conclusions:
We found that DHM plays a role in treating epilepsy and its comorbid cognitive impairment by inhibiting pyroptosis and inflammation.
Insights
Dihydromyricetin (DHM) reduces seizures and cognitive decline in epilepsy by inhibiting NLRP3 inflammasome-driven inflammation and pyroptosis, offering neuroprotection.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- The NLRP3 inflammasome pathway is implicated in neurological disorders like epilepsy.
- Dihydromyricetin (DHM) demonstrates neuroprotective properties, but its role in epilepsy-related cognitive impairment via NLRP3 is unclear.
Purpose of the Study:
- To investigate DHM's effect on the NLRP3 inflammasome pathway in a rat model of epilepsy.
- To determine if DHM can mitigate neuronal injury and cognitive deficits associated with pilocarpine-induced seizures.
Main Methods:
- Established a pilocarpine-induced epilepsy model in rats.
- Assessed seizure frequency/duration, neuronal damage (Nissl staining), and cognitive function (Morris water maze).
- Analyzed NLRP3 inflammasome components, pyroptosis markers, and synaptic protein expression in the hippocampus.
Main Results:
- DHM treatment reduced seizure frequency and duration post-status epilepticus (SE).
- DHM improved cognitive function and long-term potentiation, increasing synaptic protein expression.
- DHM protected hippocampal pyramidal neurons, potentially by inhibiting NLRP3-associated pyroptosis.
Conclusions:
- DHM demonstrates therapeutic potential for epilepsy and associated cognitive impairment.
- Inhibition of pyroptosis and inflammation by DHM underlies its neuroprotective effects in epilepsy.
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