OBJECTIVE: The newborn rat model has been developed to elucidate the mechanism and management of perinatal brain damage. Our study hypothesis is that an acetylcholine receptor agonist (carbachol) reduces hypoxia-ischemia (HI)-induced brain damage in a well-established newborn rat model. STUDY DESIGN: 7-day-old Wistar rats were divided into 3 groups at random: carbachol preinjection and HI (Carb/HI), saline preinjection and HI (Saline/HI), and only HI (HI). Rats were subjected to left carotid artery ligation followed by 2 hours of hypoxia (8% oxygen). We injected carbachol or saline before hypoxic loading. After 7 days, we checked for brain damage. RESULTS: In the cerebral cortex, 25% of the Carb/HI group showed mild neural damage, and the remaining 75% showed no damage. In contrast, more than 80% of the Saline/HI and HI groups had severe neural damage. Similarly, neural damage significantly decreased in Carb/HI compared with Saline/HI and HI for CA1, CA2, CA3, and the dentate gyrus of hippocampal regions. CONCLUSION: Acetylcholine receptor agonist has a potent effect by reducing perinatal brain damage induced by HI in newborn rats.
OBJECTIVE: The newborn rat model has been developed to elucidate the mechanism and management of perinatal brain damage. Our study hypothesis is that an acetylcholine receptor agonist (carbachol) reduces hypoxia-ischemia (HI)-induced brain damage in a well-established newborn rat model. STUDY DESIGN: 7-day-old Wistar rats were divided into 3 groups at random: carbachol preinjection and HI (Carb/HI), saline preinjection and HI (Saline/HI), and only HI (HI). Rats were subjected to left carotid artery ligation followed by 2 hours of hypoxia (8% oxygen). We injected carbachol or saline before hypoxic loading. After 7 days, we checked for brain damage. RESULTS: In the cerebral cortex, 25% of the Carb/HI group showed mild neural damage, and the remaining 75% showed no damage. In contrast, more than 80% of the Saline/HI and HI groups had severe neural damage. Similarly, neural damage significantly decreased in Carb/HI compared with Saline/HI and HI for CA1, CA2, CA3, and the dentate gyrus of hippocampal regions. CONCLUSION: Acetylcholine receptor agonist has a potent effect by reducing perinatal brain damage induced by HI in newborn rats.
Authors: L E Durán-Carabali; E F Sanches; F K Odorcyk; F Nicola; R G Mestriner; L Reichert; D Aristimunha; A S Pagnussat; C A Netto Journal: Neurochem Res Date: 2019-09-28 Impact factor: 3.996
Authors: F K Odorcyk; E F Sanches; F C Nicola; J Moraes; L F Pettenuzzo; J Kolling; C Siebert; A Longoni; E L Konrath; A Wyse; C A Netto Journal: Neurochem Res Date: 2016-11-24 Impact factor: 3.996