کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2847992 | 1167399 | 2009 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Riluzole disrupts autoresuscitation from hypothermic respiratory arrest in neonatal hamsters but not rats Riluzole disrupts autoresuscitation from hypothermic respiratory arrest in neonatal hamsters but not rats](/preview/png/2847992.png)
We examined the effect of riluzole on expression of the central respiratory rhythm and the ability of neonates to autoresuscitate from hypothermic respiratory arrest using in vitro brainstem-spinal cord preparations of rats and hamsters. At a constant temperature of 27 °C, riluzole (5–200 μM) decreased the burst amplitude of respiratory-related motor discharge, but had little effect on the fictive respiratory frequency in rat preparations. In contrast, in hamster preparations, riluzole reduced fictive respiratory frequency, but had little effect on burst amplitude. Hamster preparations were more cold-tolerant than rat preparations, with respiratory arrest and autoresuscitation occurring at lower temperatures during cooling of the preparation. This difference was removed by incubation with riluzole (5 μM); riluzole significantly increased the temperature at which fictive respiration arrested and restarted in hamster preparations, but had no effect in rat preparations. The species differences observed in this study may reflect fundamental differences in the relative role of riluzole-sensitive mechanisms in the expression of the respiratory rhythm in early development of an altricial vs. a more precocial species.
Journal: Respiratory Physiology & Neurobiology - Volume 166, Issue 3, 15 May 2009, Pages 175–183