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Original Article
Neonatology (Perinatology)
Predictive factors of death in neonates with hypoxic-ischemic encephalopathy receiving selective head cooling
Behnaz Basiri, Mohammadkazem Sabzehei, Mohammadmahdi sabahi
Clin Exp Pediatr. 2021;64(4):180-187.   Published online August 27, 2020
Question: What is the most important factor that increases mortality in infants with hypoxic-ischemic encephalopathy (HIE) who receive selective head cooling?
Finding: All cases of neonatal mortality were severe HIE (stage 3), and a severely abnormal amplitude-integrated electroencephalography and mortality were increased with the need for advanced neonatal resuscitation upon delivery.
Meaning: Advanced neonatal resuscitation affects HIE outcomes, and medical personnel should be prepared to provide the best intervention.
Neuroprotective effects of erythropoietin against hypoxic injury via modulation of the mitogen-activated protein kinase pathway and apoptosis
Ji Eun Jeong, Jae Hyun Park, Chun Soo Kim, Sang Lak Lee, Hai Lee Chung, Woo Taek Kim, Eun Joo Lee
Clin Exp Pediatr. 2017;60(6):181-188.   Published online June 22, 2017
Purpose

Hypoxic-ischemic encephalopathy is a significant cause of neonatal morbidity and mortality. Erythropoietin (EPO) is emerging as a therapeutic candidate for neuroprotection. Therefore, this study was designed to determine the neuroprotective role of recombinant human EPO (rHuEPO) and the possible mechanisms by which mitogen-activated protein kinase (MAPK) signaling pathway including extracellular signal-regulated kinase (ERK1/2), JNK, and p38 MAPK is modulated in...

Neurology
Prognostic factors of neurological outcomes in late-preterm and term infants with perinatal asphyxia
Sun Young Seo, Gyu Hong Shim, Myoung Jae Chey, Su Jeong You
Clin Exp Pediatr. 2016;59(11):440-445.   Published online November 18, 2016
Purpose

This study aimed to identify prognostic factors of neurological outcomes, including developmental delay, cerebral palsy and epilepsy in late-preterm and term infants with perinatal asphyxia.

Methods

All late-preterm and term infants with perinatal asphyxia or hypoxic-ischemic insults who admitted the neonatal intensive care unit of Inje University Sanggye Paik Hospital between 2006 and 2014 and were followed up for at least 2...

Neuroprotective effects of L-carnitine against oxygen-glucose deprivation in rat primary cortical neurons
Yu Jin Kim, Soo Yoon Kim, Dong Kyung Sung, Yun Sil Chang, Won Soon Park
Clin Exp Pediatr. 2012;55(7):238-248.   Published online July 17, 2012
Purpose

Hypoxic-ischemic encephalopathy is an important cause of neonatal mortality, as this brain injury disrupts normal mitochondrial respiratory activity. Carnitine plays an essential role in mitochondrial fatty acid transport and modulates excess acyl coenzyme A levels. In this study, we investigated whether treatment of primary cultures of rat cortical neurons with L-carnitine was able to prevent neurotoxicity resulting from oxygen-glucose deprivation...

The significance of corpus callosal size in the estimation of neurologically abnormal infants
Seung Taek Yu, Chang Woo Lee
Clin Exp Pediatr. 2008;51(11):1205-1210.   Published online November 15, 2008
Purpose : The development of the corpus callosum occupies the entire period of cerebral formation. The myelination pattern on magnetic resonance imaging (MRI) is very useful to evaluate neurologic development and to predict neurologic outcome in high risk infants. The thickness of the corpus callosum is believed to depend on the myelination process. It is possible to calculate the length...
The neuroprotective effect of mycophenolic acid via anti-apoptosis in perinatal hypoxic-ischemic brain injury
Ji Young Kim, Seung Ho Yang, Sun Hwa Cha, Ji Yeun Kim, Young Chae Jang, Kwan Kyu Park, Jin Kyung Kim, Hai Lee Chung, Eok Su Seo, Woo Taek Kim
Clin Exp Pediatr. 2007;50(7):686-693.   Published online July 15, 2007
Purpose : Mycophenolic acid (MPA), the active metabolite of mycophenolate mofetil (MMF), is a potent inhibitor of inosine-monophosphate dehydrogenase (IMPDH), a new immunosuppressive drug used. It was reported that MPA protected neurons after excitotoxic injury, induced apoptosis in microglial cells. However, the effects of MPA on hypoxic-ischemic (HI) brain injury has not been yet evaluated. Therefore, we examined whether MPA...
Single Cell Dissociation Methods for Flow Cytometric Cell Death Analysis of Hypoxia-Ischemia Injured Newborn Rat Pup Brain
Jong Hee Hwang, Dong Kyung Sung, Chang Won Choi, Saem Kang, Yun Sil Chang, Won Soon Park, Munhyang Lee
Clin Exp Pediatr. 2005;48(5):545-550.   Published online May 15, 2005
Purpose : Newborn brain tissue has to be dissociated into a single cell suspension for flow cytometric analysis of cell death during hypoxia-ischemia. Thus the development of a method to dissociate cells from the brain tissue with least damage and maintenance of membrane and antigen integrity remains the challenge for the in vivo application of this technique. We evaluated the...
Effects of 7-Nitroindazole on Brain Cell Membrane Function and Energy Metabolism during Transient Global Cerebral Hypoxia-Ischemia and Reoxygenation-Reperfusion in Newborn Piglets
Chang Won Choi, Jong Hee Hwang, Yun Sil Chang, Won Soon Park
Clin Exp Pediatr. 2004;47(2):204-209.   Published online February 15, 2004
Purpose : Our study was undertaken to discover whether a selective neuronal nitric oxide synthase inhibitor, 7-nitroindazole, influences brain cell membrane function and energy metabolism during and after transient global hypoxia-ischemia(HI) in newborn piglets. Methods : Cerebral HI was induced by temporary complete occlusion of bilateral common carotid arteries and simultaneous breathing with 8% oxygen for 30 minutes, followed by release...
The Effect of Postnatal Dexamethasone Treatment on Hypoxic-Ischemic Brain Injury in Neonatal Rats
Chang Ro Park, Kyung Pil Park, Heng Mi Kim, Yoon Kyung Sohn
Clin Exp Pediatr. 2003;46(10):989-995.   Published online October 15, 2003
Purpose : Dexamethasone is frequently administered to prevent or treat chronic lung disease in human neonates who are also prone to hypoxic-ischemic(HI) insults. Recently, meta-analysis of the follow-up studies reveals a significantly increased odd ratio for the occurrence of cerebral palsy or an abnormal neurologic outcome, and there is conflicting evidence regarding the impact of dexamethasone exposure on HI brain...
Effect of Hypoxia-Ischemia on Striatal Monoamine Metabolism in Neonatal Rat Brains
Youn Hee Jee, Hyung Gun Kim, Woo Sung Park, Young Pyo Chang
Clin Exp Pediatr. 2003;46(8):789-794.   Published online August 15, 2003
Purpose : We intended to evaluate the effect of hypoxia-ischemia on extracellular striatal monoamine metabolism in neonatal rat brains by in vivo microdialysis. Methods : The right common carotid arteries of five or six-day old rats were surgically ligated, and the probes for microdialysis were inserted into the right striatum with stereotaxic instrument. After stabilization for two hours, artificial cerebrospinal fluid...
Effect of Xanthine Oxidase Inhibitor on Cerebral Hypoxia-Ischemia in Neonatal Rats
Dae-Ho Choi, Yeon-Kyun Oh, Seung-Tak Park
Clin Exp Pediatr. 2002;45(6):732-742.   Published online June 15, 2002
Purpose : In order to evaluate the hypoxia-ischemia(H-I) induced neurotoxicity and the protective effect of xanthine oxidase(XO) inhibitor(allopurinol), cell number, cell viability, lactate dehydrogenase(LDH), protein synthesis(PS) and protein kinase C(PKC) activity were measured in cerebral neurons and astrocytes. Methods : Cytotoxic effect was measured by in vitro assay at 12-72 hours after H-I on cerebral neurons and astrocytes derived from 7-day...
Effect of Vitamin E on Cerebral Hypoxia-Ischemia in Neonatal Rats
Jung Eun Seok, Yeon Kyun Oh, Seung Taek Park
Clin Exp Pediatr. 2001;44(7):764-772.   Published online July 15, 2001
Purpose : In order to evaluate the hypoxia-ischemia induced neurotoxic effect and the protective effect of vitamin E as an antioxidant, cell number and cell viability were measured in cerebral neurons and astrocytes derived in neonatal rats. Methods : 7-day old neonatal rats were subjected to unilateral common carotid artery occlusion, and exposed to hypoxic condition for 3 hours. The protective...
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...
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