Abstract
Inflammation is one of the mechanisms involved in seizure induction. In this study, the effect of minocycline, an anti-inflammatory drug, was investigated on kindling acquisition. Chemical kindling was induced by injection of a subthreshold dose of pentylenetetrazol (PTZ; 37.5 mg/kg) in mice on every other day. Two groups of animals received minocycline (25 mg/kg) at 1 h before or 1 h after PTZ injection. Following the last PTZ injection, the changes in gene expression of TNF-α receptor, γ2 subunit of GABAA receptor and NR2A subunit of NMDA receptor were assessed in the hippocampus and piriform cortex. Injection of minocycline before PTZ increased the latency to stage 4 seizure, and decreased the duration of stages 4 and 5 seizure. It also prevented the increase in the mRNA of NR2A subunit of NMDA receptor in the hippocampus and removed the PTZ-induced increase in mRNA of γ2 subunit of GABAA receptor in piriform cortex of PTZ kindled mice. Minocycline also prevented the increase in TNF-α receptor gene expression in both hippocampus and piriform cortex. Injection of minocycline after PTZ had no significant effect on measured parameters. Therefore, it can be concluded that minocycline may exert an anticonvulsant effect through preventing the increase in GABAA and NMDA receptor subunits. These effects are accompanied by a reduction in an important inflammation index, TNF-α receptor.
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Kwan P, Brodie MJ (2006) Combination therapy in epilepsy: when and what to use. Drugs 66:1817–1829
Vezzani A (2005) Inflammation and epilepsy. Epilepsy Curr 5:1–6
Lucas SM, Rothwell NJ, Gibson RM (2006) The role of inflammation in CNS injury and disease. Br J Pharmacol 147(Suppl 1):S232–S240
Vezzani A, Granata T (2005) Brain inflammation in epilepsy: experimental and clinical evidence. Epilepsia 46:1724–1743
Pitkanen A, Sutula TP (2002) Is epilepsy a progressive disorder? Prospects for new therapeutic approaches in temporal-lobe epilepsy. Lancet Neurol 1:173–181
Meli DN, Loeffler JM, Baumann P, Neumann U, Buhl T, Leppert D, Leib SL (2004) In pneumococcal meningitis a novel water-soluble inhibitor of matrix metalloproteinases and TNF-alpha converting enzyme attenuates seizures and injury of the cerebral cortex. J Neuroimmunol 151:6–11
Balosso S, Ravizza T, Perego C, Peschon J, Campbell IL, De Simoni MG, Vezzani A (2005) Tumor necrosis factor-alpha inhibits seizures in mice via p75 receptors. Ann Neurol 57:804–812
Stirling DP, Koochesfahani KM, Steeves JD, Tetzlaff W (2005) Minocycline as a neuroprotective agent. Neuroscientist 11:308–322
Lee SM, Yune TY, Kim SJ, Park DW, Lee YK, Kim YC, Oh YJ, Markelonis GJ, Oh TH (2003) Minocycline reduces cell death and improves functional recovery after traumatic spinal cord injury in the rat. J Neurotrauma 20:1017–1027
Gonzalez JC, Egea J, Del Carmen Godino M, Fernandez-Gomez FJ, Sanchez-Prieto J, Gandia L, Garcia AG, Jordan J, Hernandez-Guijo JM (2007) Neuroprotectant minocycline depresses glutamatergic neurotransmission and Ca(2 +) signalling in hippocampal neurons. Eur J Neurosci 26:2481–2495
Abraham J, Fox PD, Condello C, Bartolini A, Koh S (2012) Minocycline attenuates microglia activation and blocks the long-term epileptogenic effects of early-life seizures. Neurobiol Dis 46:425–430
Nowak M, Strzelczyk A, Reif PS, Schorlemmer K, Bauer S, Norwood BA, Oertel WH, Rosenow F, Strik H, Hamer HM (2012) Minocycline as potent anticonvulsant in a patient with astrocytoma and drug resistant epilepsy. Seizure 21:227–228
Wang DD, Englot DJ, Garcia PA, Lawton MT, Young WL (2012) Minocycline- and tetracycline-class antibiotics are protective against partial seizures in vivo. Epilepsy Behav 24:314–318
Lason W, Turchan J, Przewlocka B, Labuz D, Machelska H, Przewlocki R (1998) Effects of pentylenetetrazol kindling on glutamate receptor genes expression in the rat hippocampus. Brain Res 785:355–358
Lukomskaya NY, Lavrent’eva VV, Starshinova LA, Zhabko EP, Gorbunova LV, Tikhonova TB, Gmiro VE, Magazanik LG (2007) Effects of ionotropic glutamate receptor channel blockers on the development of pentylenetetrazol kindling in mice. Neurosci Behav Physiol 37:75–81
Ghasemi M, Schachter SC (2011) The NMDA receptor complex as a therapeutic target in epilepsy: a review. Epilepsy Behav 22:617–640
Treiman DM (2001) GABAergic mechanisms in epilepsy. Epilepsia 42(Suppl 3):8–12
Cremer CM, Palomero-Gallagher N, Bidmon HJ, Schleicher A, Speckmann EJ, Zilles K (2009) pentylenetetrazol-induced seizures affect binding site densities for GABA, glutamate and adenosine receptors in the rat brain. Neuroscience 163:490–499
Grecksch G, Ruethrich H, Bernstein HG, Becker A (1995) PTZ-kindling after colchicine lesion in the dentate gyrus of the rat hippocampus. Physiol Behav 58:695–698
Vezzani A, Friedman A (2011) Brain inflammation as a biomarker in epilepsy. Biomark Med 5:607–614
Vezzani A, Friedman A, Dingledine RJ (2013) The role of inflammation in epileptogenesis. Neuropharmacol 69:16–24
Vezzani A, Aronica E, Mazarati A, Pittman QJ (2013) Epilepsy and brain inflammation. Exp Neurol 244:11–21
Walsh LA, Li M, Zhao TJ, Chiu TH, Rosenberg HC (1999) Acute pentylenetetrazol injection reduces rat GABAA receptor mRNA levels and GABA stimulation of benzodiazepine binding with no effect on benzodiazepine binding site density. J Pharmacol Exp Ther 289:1626–1633
Plata-Salaman CR, Ilyin SE, Turrin NP, Gayle D, Flynn MC, Romanovitch AE, Kelly ME, Bureau Y, Anisman H, McIntyre DC (2000) Kindling modulates the IL-1beta system, TNF-alpha, TGF-beta1, and neuropeptide mRNAs in specific brain regions. Brain Res Mol Brain Res 75:248–258
Zhang XM, Zhu J (2011) Kainic Acid-induced neurotoxicity: targeting glial responses and glia-derived cytokines. Curr Neuropharmacol 9:388–398
Al-Shorbagy MY, El Sayeh BM, Abdallah DM (2012) Diverse effects of variant doses of dexamethasone in lithium-pilocarpine induced seizures in rats. Can J Physiol Pharmacol 90:13–21
Franke H, Kittner H (2001) Morphological alterations of neurons and astrocytes and changes in emotional behavior in pentylenetetrazol-kindled rats. Pharmacol Biochem Behav 70:291–303
Becker A, Braun H, Schröder H, Grecksch G, Höllt V (1999) Effects of enadoline on the development of pentylenetetrazol kindling, learning performance, and hippocampal morphology. Brain Res 823:191–197
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This study was supported by grants from Vice Chancellor for Research Affairs of Tarbiat Modares University, Tehran, Iran.
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Ahmadirad, N., Shojaei, A., Javan, M. et al. Effect of minocycline on pentylenetetrazol-induced chemical kindled seizures in mice. Neurol Sci 35, 571–576 (2014). https://doi.org/10.1007/s10072-013-1552-0
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DOI: https://doi.org/10.1007/s10072-013-1552-0