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Updated: Sep 26, 2025
Preparation and Implantation of Electrodes for Electrically Kindling VGAT-Cre Mice to Generate a Model for Temporal Lobe Epilepsy
Published on: August 17, 2021
Anti-Epileptic Effect of Crocin on Experimental Temporal Lobe Epilepsy in Mice
Kai Zhong1, Chengyu Qian1, Rui Lyu1
1Department of Pharmacology, School of Basic Medical Sciences and Forensic Medicine, Hangzhou Medical College, Hangzhou, China.
Abstract:
Temporal lobe epilepsy (TLE) is a common kind of refractory epilepsy. More than 30% TLE patients were multi-drug resistant. Some patients may even develop into status epilepticus (SE) because of failing to control seizures. Thus, one of the avid goals for anti-epileptic drug development is to discover novel potential compounds to treat TLE or even SE. Crocin, an effective component of Crocus sativus L., has been applied in several epileptogenic models to test its anti-epileptic effect. However, it is still controversial and its effect on TLE remains unclear. Therefore, we investigated the effects of crocin on epileptogenesis, generalized seizures (GS) in hippocampal rapid electrical kindling model as well as SE and spotaneous recurrent seizure (SRS) in pilocarpine-induced TLE model in ICR mice in this study. The results showed that seizure stages and cumulative afterdischarge duration were significantly depressed by crocin (20 and 50 mg/kg) during hippocampal rapid kindling acquisition. And crocin (100 mg/kg) significantly reduced the incidence of GS and average seizure stages in fully kindled animals. In pilocarpine-induced TLE model, the latency of SE was significantly prolonged and the mortality of SE was significantly decreased by crocin (100 mg/kg), which can also significantly suppress the number of SRS. The underlying mechanism of crocin may be involved in the protection of neurons, the decrease of tumor necrosis factor-α in the hippocampus and the increase of brain derived neurotrophic factor in the cortex. In conclusion, crocin may be a potential and promising anti-epileptic compound for treatment of TLE.
Insights
Crocin, derived from saffron, shows promise in treating refractory epilepsy. This study found crocin effectively reduced seizure severity and incidence in animal models of temporal lobe epilepsy (TLE) and status epilepticus (SE).
Area of Science:
- Neuroscience
- Pharmacology
- Epilepsy Research
Background:
- Temporal lobe epilepsy (TLE) is a common, often drug-resistant form of epilepsy, with over 30% of patients unresponsive to multiple medications.
- Status epilepticus (SE), a severe complication of uncontrolled seizures, poses a significant threat to TLE patients, highlighting the need for novel anti-epileptic drugs.
- Crocin, a key component of *Crocus sativus L.* (saffron), has demonstrated anti-epileptic potential, but its efficacy in TLE remains incompletely understood.
Purpose of the Study:
- To investigate the anti-epileptic effects of crocin in established animal models of TLE and SE.
- To evaluate crocin's impact on epileptogenesis, generalized seizures (GS), SE, and spontaneous recurrent seizures (SRS).
Main Methods:
- Hippocampal rapid electrical kindling model in ICR mice to assess effects on epileptogenesis and GS.
- Pilocarpine-induced TLE model in ICR mice to evaluate effects on SE latency, mortality, and SRS.
- Assessment of neuroprotective mechanisms, including hippocampal TNF-α and cortical BDNF levels.
Main Results:
- Crocin (20 and 50 mg/kg) significantly reduced seizure stages and afterdischarge duration during kindling acquisition.
- Crocin (100 mg/kg) decreased the incidence and severity of generalized seizures in fully kindled animals.
- In the pilocarpine model, crocin (100 mg/kg) prolonged SE latency, reduced SE mortality, and suppressed SRS frequency.
Conclusions:
- Crocin demonstrates significant anti-epileptic activity in both kindling and pilocarpine-induced TLE models.
- Potential mechanisms include neuroprotection, reduction of hippocampal tumor necrosis factor-α, and elevation of cortical brain-derived neurotrophic factor.
- Crocin represents a promising therapeutic candidate for the treatment of TLE and potentially SE.
