neurogenesis induced by seizures in the dentate gyrus is not related to mossy fiber sprouting but is age dependent in developing rats a neurogênese induzida por crises no giro denteado não está relacionada ao brotamento de fibras musgosas, mas é dependente da idade, em ratos durante o desenvolvimento

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ID: 250864
2008
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Abstrak
Neurogenesis in the dentate gyrus (DG) has attracted attention since abnormal supragranular mossy fiber sprouting occurs in the same region, in temporal lobe epilepsy. Thus, we submitted developing rats to pilocarpine-induced status epilepticus (SE) to study the relationship between neurogenesis and mossy fiber sprouting. Groups were submitted to SE at: I-P9, II-P7, P8 and P9, III-P17 e IV-P21. Neurogenesis was quantified using BrdU protocol and confirmed through double staining, using neuronal pentraxin. Other animals were monitored by video system until P120 and their brain was studied (Timm and Nissl staining). The neurogenesis at P17 (p=0.007) and P21 (p=0.006) were increased. However, only P21 group showed recurrent seizures and the mossy fiber sprouting in the same region, during adult life, while P17 did not. Thus, our results suggest that neurogenesis is not related to mossy fiber sprouting neither to recurrent spontaneous seizures in pilocarpine model.
A neurogênese no giro dentado tem atraído atenção já que ela ocorre na mesma região do hipocampo que o brotamento das fibras musgosas, na epilepsia do lobo temporal. Assim, submetemos ratos em desenvolvimento ao status epilepticus induzido (SE) por pilocarpine. Grupos foram submetidos em I-P9, II-P7, P8, P9; III-P17 e IV-P21. A neurogênese foi observada usando o protocolo do BrdU e confirmada por dupla marcação com pentraxina neuronal. Outros animais foram monitorados até P120 e seus cérebros analisados (Nissl e Timm). A neurogênese nos grupos P17 (p=0,007) e P21 (p=0,006) aumentaram. Entretanto, o P21 apresentou crises espontâneas e brotamento de fibras musgosas, na mesma região onde ocorreu a neurogênese, enquanto o grupo P17 apresentou somente aumento na neurogênese. Assim, nossos resultados sugerem que o fenômeno da neurogênese não está relacionado com o brotamento de fibras musgosas nem com o aparecimento de crises espontâneas e recorrentes no modelo da pilocarpina.
Kunci Referensi
sanabria2008arquivosneurogenesis Gunakan kunci ini untuk mengutip otomatis dalam naskah saat menggunakan SciMatic Manuscript Manager atau Thesis Manager
Penulis ;Yaima del Carmen Garrido Sanabria;Gustavo Adolfo Argañaraz;Eliangela Lima;Margareth Rose Priel;Edvaldo da Silva Trindade;Luana Mazzacoratti Loeb;Fulvio Alexandre Scorza;Esper Abrão Cavalheiro;Débora Amado;Maria da Graça Naffah-Mazzacoratti
Jurnal communications in computer and information science
Tahun 2008
DOI
10.1590/S0004-282X2008000600015
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2008000600015
Kata Kunci
epilepsy development neurogenesis neuropsychiatry biological psychiatry desenvolvimento

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