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| Abhay Sharma; Farhan Mohammad; Priyanka Singh. |
| A male Drosophila model of locomotor deficit induced by chronic pentylenetetrazole (PTZ), a proconvulsant used to model epileptogenesis in rodents, has recently been described. Antiepileptic drugs (AEDs) ameliorate development of this behavioral abnormality. Time-series of microarray profiling of heads of male flies treated with PTZ has shown epileptogenesis-like transcriptomic perturbation in the fly model. Gender differences are known to exist in neurological and psychiatric conditions including epileptogenesis. We describe here the effects of chronic PTZ in Drosophila females, and compare the results with the male model. As in males, chronic PTZ was found found to cause a decreased climbing speed in females. In males, overrepresentation of Wnt, MAPK,... |
| Tipo: Manuscript |
Palavras-chave: Genetics & Genomics; Neuroscience; Pharmacology; Bioinformatics. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3460/version/1 |
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| Farhan Mohammad; Priyanka Singh; Abhay Sharma. |
| In a newly described _Drosophila_ model, two of the five antiepileptic drugs (AEDs) tested, sodium valproate (NaVP) and levetiracetam (LEV), not ethosuximide (ETH), gabapentin (GBP) and vigabatrin (VGB), ameliorate development of chronic pentylenetetrazole (PTZ) induced locomotor alteration. To further characterize the model, we analyze here the microarray expression profile of heads of flies treated with depolarizing compound potassium chloride (KCl). Surprisingly, microarray clustering showed unexpected similarity among KCl, LEV and NaVP. Further, like the two effective AEDs in the fly model, KCl regulated genes overrepresented ribosomal pathway. Interestingly, KCl also ameliorated development of locomotor deficit in the chronic PTZ model. Both... |
| Tipo: Manuscript |
Palavras-chave: Genetics & Genomics; Neuroscience; Pharmacology; Bioinformatics. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3429/version/1 |
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| Priyanka Singh; Farhan Mohammad; Abhay Sharma. |
| Mechanisms of long term action of antiepileptic drugs (AEDs), used in treating epilepsy and many other neurological and psychiatric disorders, are poorly understood. Recently, a novel Drosophila transcriptomic model of locomotor plasticity induced by chronic pentylenetetrazole (PTZ), a chemoconvulsant commonly used to model epileptogenesis and test AEDs in rodents, has been described. In this model, two of the five AEDs tested, sodium valproate (NaVP) and levetiracetam (LEV), not ethosuximide (ETH), gabapentin (GBP) and vigabatrin (VGB), ameliorate development of chronic PTZ induced locomotor alteration. Here, we describe transcriptomic effect of the AEDs in the fly model. Singular treatment with ETH, GBP and VGB in general caused downregulation of genes.... |
| Tipo: Manuscript |
Palavras-chave: Genetics & Genomics; Neuroscience; Pharmacology; Bioinformatics. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3396/version/1 |
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| Priyanka Singh; Farhan Mohammad; Abhay Sharma. |
| Rodent kindling induced by pentylenetetrazole (PTZ) is an established model of epileptogenesis and antiepileptic drug (AED) testing. Recently, a Drosophila systems model has been described in which chronic PTZ causes a decreased climbing speed in adult males on 7th day. Some AEDs ameliorate development of this locomotor deficit. Time-series of microarray expression profiles of heads of flies treated with PTZ has been found to resemble transcriptomic alterations associated with epileptogenesis. In the fly model, withdrawal from seven day long PTZ treatment causes an increased climbing speed on 7th consequent day. Here, we present a systems model of the post-PTZ withdrawal regime. Unlike AED-untreated individuals, flies treated with any of the five AEDs... |
| Tipo: Manuscript |
Palavras-chave: Genetics & Genomics; Neuroscience; Pharmacology; Bioinformatics. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3447/version/1 |
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