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Original Article
Therapeutic Effect of Nimodipine in Neonatal Rat Model of Cerebral Hypoxia-Ischemia
Ihn-Hee Hong, Heng-Mi Kim
Clin Exp Pediatr. 1999;42(11):1552-1558.   Published online November 15, 1999
Purpose : Recent studies suggest that nimodipine, a potent calcium-channel blocker, may improve neurological outcome after experimental hypoxia-ischemic brain injury. This study was conducted to evaluate the therapeutic effect of nimodipine on hypoxia-ischemia in immature rat brain. Methods : Seven-day postnatal rats were subjected to hypoxia-ischemia by unilateral common carotid artery occlusion combined with 2 hours of hypoxia(in 8% oxygen...
The Protective Effect of Vitamin E and Desferrioxamine on Cultured Cerebral Neurons of Neonatal Mouse Damaged by Ischemic Condition
So-ra Lee, Yeon-kyun Oh, Seung-taek Park
Clin Exp Pediatr. 1999;42(10):1426-1433.   Published online October 15, 1999
Purpose : Perinatal asphyxia is an important cause of neurologic morbidity. Experiments in animal models of hypoxic-ischemic brain injury demonstrate that brain damage starts during hypoxia-ischemia. In order to evaluate the ischemic condition-induced neurotoxic effect in view of oxi- dative stress, we examined the cytotoxic effect in cultured cerebral neurons of neonatal mouse. Methods : Dissociated cell cultures were prepared...
The Effects of Glutamate Receptor Antagonists on Cultured Cerebral Cortical Neurons of Neonatal Mouse Damaged by Oxidative Stress
Dae-ho Choi, Yeon-kyun Oh, Seung-taek Park
Clin Exp Pediatr. 1999;42(8):1096-1103.   Published online August 15, 1999
Purpose : To evaluate neurotoxic effects induced by oxygen-radicals, which were generated by adding xanthine oxidase(XO) and hypoxanthine(HX), and protective effects of glutamate receptor antagonist such as MK-801 and 6-cyano-7-nitroquinoxaline(CNQX). Methods : Dissociated cell cultures were prepared from cerebrum of neonatal mouse. Tissues were dissected and diced into small pieces in phosphate buffered saline and were incubated at 37℃. Isolated cells...
Distribution and Expression of α-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid(AMPA) Receptor Subunits in Moderate Hypoxic Newborn Piglet Brain
Na Yeon Kim, Woo Taek Ki
Clin Exp Pediatr. 1999;42(2):239-248.   Published online February 15, 1999
Purpose : The mechanism of hypoxic damage is mainly intracellular influx of calcium ions through the glutamate ionotropic receptor(NMDA, AMPA/kainate). This study was performed to determine alterations in distribution and expression of AMPA receptor subunits after 1-hour of moderate hypoxia in the newborn piglet brain, in a state of mild to moderate perinatal hypoxic-ischemic encephalopathy. Methods : Ten newborn piglets were...
Delayed Cerebral Energy Failure After Acute Hypoxia-Ischemia in Neworn Piglet Under 48hours of Continuous Monitoring Using Near-Infrared Spectroscopy
Yun Sil Chang, Won Soon Park, Munhyang Lee, Ki-Soo Kim, Jung-Hwan Choi, Son Moon Shin
Clin Exp Pediatr. 1998;41(9):1198-1210.   Published online September 15, 1998
Purpose : To test the hemodynamic and biochemical sequences of secondary cerebral energy failure after acute reversed hypoxic ischemic brain insult(HI) can be reproduced in newborn piglets. Methods : Fifteen anesthetized, ventilated newborn piglet(<3 day) were studied. Eight(HI) were induced transient HI by breathing 8% oxygen and complete occlusion of bilateral common carotid arteries for 30 minutes followed by reoxygenation...
A Study for the Expression of the N-Methyl-D-Aspartate(NMDA) Subunit 2A(NR2A)and 2B(NR2B) of Rat Hippocampal Slices in the Hypoxic State
Hee Sin Go, Woo Taek Kim
Clin Exp Pediatr. 1996;39(9):1295-1308.   Published online September 15, 1996
Purpose : Excessive amounts of glutamate are released into the extracelluar space during hypoxia/ischemia and contribute to neuronal injury through overactivation of the NMDA receptors. It will be expected that the changes of the NMDA receptors to decrease the injury are developed as a kind of defense mechanism. The NMDA receptors are composed of NR1 and NR2, and there are four NR2 subunits; NR2A,...


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