NDLI: Zebrafish larvae exposed to ginkgotoxin exhibit seizure-like behavior that is relieved by pyridoxal-5′-phosphate, GABA and anti-epileptic drugs

Content Provider	PubMed Central
Author	Lee, Gang-hui Sung, Shian-ying Chang, Wen-ni Kao, Tseng-ting Du, Hung-chi Hsiao, Tsun-hsien Safo, Martin K. Fu, Tzu-fun
Copyright Year	2012
Abstract	The etiology of epilepsy is a very complicated, multifactorial process that is not completely understood. Therefore, the availability of epilepsy animal models induced by different mechanisms is crucial in advancing our knowledge and developing new therapeutic regimens for this disorder. Considering the advantages of zebrafish, we have developed a seizure model in zebrafish larvae using ginkgotoxin, a neurotoxin naturally occurring in Ginkgo biloba and hypothesized to inhibit the formation of the neurotransmitter γ-aminobutyric acid (GABA). We found that a 2-hour exposure to ginkgotoxin induced a seizure-like behavior in zebrafish larvae. This seizure-like swimming pattern was alleviated by the addition of either pyridoxal-5′-phosphate (PLP) or GABA and responded quickly to the anti-convulsing activity of gabapentin and phenytoin, two commonly prescribed anti-epileptic drugs (AEDs). Unexpectedly, the ginkgotoxin-induced PLP depletion in our experimental setting did not affect the homeostasis of folate-mediated one-carbon metabolism, another metabolic pathway playing a crucial role in neural function that also relies on the availability of PLP. This ginkgotoxin-induced seizure behavior was also relieved by primidone, which had been tested on a pentylenetetrazole-induced zebrafish seizure model but failed to rescue the seizure phenotype, highlighting the potential use and complementarity of this ginkgotoxin-induced seizure model for AED development. Structural and morphological characterization showed that a 2-hour ginkgotoxin exposure did not cause appreciable changes in larval morphology and tissues development. In conclusion, our data suggests that this ginkgotoxin-induced seizure in zebrafish larvae could serve as an in vivo model for epileptic seizure research and potential AED screening.
Related Links	http://dx.doi.org/10.1242/dmm.009449
Ending Page	795
Page Count	11
Starting Page	785
File Format	PDF
ISSN	17548403
e-ISSN	17548411
Journal	Disease Models & Mechanisms
Issue Number	6
Volume Number	5
Language	English
Publisher	The Company of Biologists Limited
Publisher Date	2012-11-01
Access Restriction	Open
Rights Holder	The Company of Biologists Limited
Subject Keyword	Immunology and Microbiology (miscellaneous) Biochemistry, Genetics and Molecular Biology(all) Medicine (miscellaneous) Neuroscience (miscellaneous) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Neuroscience Immunology and Microbiology Medicine Biochemistry, Genetics and Molecular Biology

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