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Updated: Aug 14, 2026
Behavioral And Physiological Analysis In A Zebrafish Model Of Epilepsy
Published on: October 19, 2021
The ketogenic diet ameliorates behavioral abnormalities in a PTZ-induced zebrafish larvae model via modulating
Xue Yang1, Jia Lin2, Qi Zhang2
1Department of Neurology, National Children's Medical Center, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai 201102, China.
Purpose:
The ketogenic diet (KD) is a well-established therapy for drug-resistant epilepsy, reducing seizure burden in children and improving cognition in epileptic encephalopathy patients, but its underlying mechanisms remain incompletely understood. This study aimed to establish a translational zebrafish model to investigate KD's anti-epileptic potential and mechanisms, focusing on neurotransmitter homeostasis.
Method:
Acute epilepsy was induced in 7-day post-fertilization (dpf) zebrafish larvae (n = 24/group, randomly assigned) using pentylenetetrazol (PTZ), a selective GABA-A receptor antagonist. KD was administered to the treatment group, with behavioral assays (locomotor activity, thigmotaxis), electroencephalographic (EEG) recordings, and high-performance liquid chromatography (HPLC) for neurotransmitter quantification. Statistics were analyzed via two-way ANOVA/Tukey's test or Student's t-test.
Results:
Results showed KD significantly ameliorated PTZ-induced epileptiform behaviors (prolonged seizure latency, reduced stage-specific duration), attenuated EEG multi-peak discharges, increased inhibitory neurotransmitters (GABA, glycine, taurine), and reversed PTZ-induced excitatory-inhibitory neurotransmitter imbalance (e.g., Glu/GABA, Gln/Tau ratios).
Conclusion:
We established a PTZ-induced amphibian epilepsy model with KD intervention. KD exerts anti-epileptic effects, likely mediated partially by rebalancing central nervous system neurotransmitter homeostasis, providing a valuable translational platform for further mechanism research.
