Details

Autor(en) / Beteiligte

• Teixeira, M.D.A
• Nascimento, N.R.F
• Fonteles, M.C
• Vale, O.C

Titel

Uroguanylin induces electroencephalographic spikes in rats/ Uroguanilina induz potenciais em espiga no eletroencefalograma de ratos

Ist Teil von

• Brazilian journal of biology, 2013-08, Vol.73 (3), p.623

Ort / Verlag

São Carlos: Association of the Brazilian Journal of Biology

Erscheinungsjahr

2013

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Uroguanylin (UGN) is an endogenous peptide that acts on membrane-bound guanylate cyclase receptors of intestinal and renal cells increasing cGMP production and regulating electrolyte and water epithelial transport. Recent research works demonstrate the expression of this peptide and its receptor in the central nervous system. The current work was undertaken in order to evaluate modifications of electroencephalographic spectra (EEG) in anesthetized Wistar rats, submitted to intracistemal infusion of uroguanylin (0.0125 nmoles/min or 0.04 nmoles/min). The current observations demonstrate that 0.0125 nmoles/min and 0.04 nmoles/min intracistemal infusion of UGN significantly enhances amplitude and frequency of sharp waves and evoked spikes (p = 0.03). No statistical significance was observed on absolute alpha and theta spectra amplitude. The present data suggest that UGN acts on bioelectrogenesis of cortical cells by inducing hypersynchronic firing of neurons. This effect is blocked by nedocromil, suggesting that UGN acts by increasing the activity of chloride channels. [PUBLICATION ABSTRACT]