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Low Dose Zinc Supplementation Beneficially Affects Seizure Development in Experimental Seizure Models in Rats

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Abstract

The role of zinc in seizure models and with antiepileptic drugs sodium valproate (SV) and phenytoin (PHT) was studied using experimental models of seizures in rats. Male Wistar rats, 150–250 g were administered zinc 2, 20, and 200 mg/kg, orally for 14 days. Sixty minutes after the last dose of zinc, rats were challenged with pentylenetetrazole (PTZ, 60 mg/kg, ip) or maximal electroshock (MES, 70 mA, 0.2 s duration). In another group, SV (150/300 mg/kg, ip) or PHT (40 mg/kg, ip) was administered after 30 min of zinc administration followed by seizure challenge. Zinc pretreatment at all doses had no effect on MES seizures. In PTZ seizures, with the lowest dose used, i.e., 2 mg/kg, a protective effect was observed. Neither the protection offered by the 100 % anticonvulsant dose of SV (300 mg/kg) in PTZ seizures was affected by pre-treatment with zinc nor a combination of subanticonvulsant dose of SV (150 mg/kg) and zinc offer any statistically significant advantage over either drug alone. The combination of phenytoin with zinc had no effect on any of the parameters tested. Apart from this, chronic zinc administration hampered development of chemically (PTZ)-kindled seizures in rats. Zinc supplementation is unlikely to have any undesirable effect when used in epileptics rather it may offer advantage in epileptic and seizure prone patients.

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Acknowledgments

This work was supported by Research grant from All India Institute of Medical Sciences, New Delhi, India, to JK.

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The authors declare that they have no conflict of interest.

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  1. Neuropharmacology Laboratory, Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, 110029, India

    Hemant Kumar, Jatinder Katyal & Yogendra K. Gupta

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  1. Hemant Kumar
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Correspondence to Jatinder Katyal.

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Kumar, H., Katyal, J. & Gupta, Y.K. Low Dose Zinc Supplementation Beneficially Affects Seizure Development in Experimental Seizure Models in Rats. Biol Trace Elem Res 163, 208–216 (2015). https://doi.org/10.1007/s12011-014-0181-7

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