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Original Article
Cardiology
Apoptosis and remodeling in adriamycin-induced cardiomyopathy rat model
Young Mi Hong, Hyeryon Lee, Min-Sun Cho, Kwan Chang Kim
Clin Exp Pediatr. 2017;60(11):365-372.   Published online November 27, 2017
Purpose

The mechanism for the pathogenesis of adriamycin (ADR)-induced cardiomyopathy is not yet known. Different hypotheses include the production of free radicals, an interaction between ADR and nuclear components, and a disruption in cardiac-specific gene expression. Apoptosis has also been proposed as being involved in cardiac dysfunction. The purpose of this study was to determine if apoptosis might play a role...

Neonatology (Perinatology)
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...

The neuroprotective effect of recombinant human erythropoietin via an antiapoptotic mechanism on hypoxic-ischemic brain injury in neonatal rats
Moon Sun Kim, Yoo Kyung Seo, Hye Jin Park, Kye Hyang Lee, Kyung Hoon Lee, Eun Jin Choi, Jin Kyung Kim, Hai Lee Chung, Woo Taek Kim
Clin Exp Pediatr. 2010;53(10):898-908.   Published online October 31, 2010
Purpose

The neuroprotective effects of erythropoietin (EPO) have been recently shown in many animal models of brain injury, including hypoxic-ischemic (HI) encephalopathy, trauma, and excitotoxicity; however, limited data are available for such effects during the neonatal periods. Therefore, we investigated whether recombinant human EPO (rHuEPO) can protect against perinatal HI brain injury via an antiapoptotic mechanism.

Methods

The left carotid artery was ligated...

Apoptosis and upregulation of TNF-α and TRAIL receptor 1 (DR4) in the pathogenesis of food protein-induced enterocolitis syndrome
Jin-Bok Hwang, Sang Pyo Kim, Yu Na Kang, Seong-Ryong Lee, Seong-Il Suh, Taeg Kyu Kwon
Clin Exp Pediatr. 2010;53(4):525-531.   Published online April 15, 2010
Purpose : Expression levels of tumor necrosis factor (TNF)-α expression on the mucosa of the small intestine is increased in patients with villous atrophy in food protein-induced enterocolitis syndrome (FPIES). TNF-α has been reported to induce apoptotic cell death in the epithelial cells. We studied the TNF family and TNF-receptor family apoptosis on the duodenal mucosa to investigate their roles in the pathogenesis...
Changes in the expression of cytokines and apoptosis-related genes in children with infectious mononucleosis
Dae Sun Jo, Ji Hye Han, Sun Young Kim, Min Sun Kim, Ho Keun Yi, Dae-Yeol Lee, Pyoung Han Hwang
Clin Exp Pediatr. 2009;52(12):1348-1357.   Published online December 15, 2009
Purpose : The aims of this study were to identify the clinical characteristics and determine the changes in the expression of cytokines and apoptosis-related genes in children with infectious mononucleosis. Methods : Serological examinations of 15 pediatric patients diagnosed with infectious mononucleosis were performed prospectively. Peripheral blood from the patients was used to compare the composition of T cell subsets,...
Taurine exerts neuroprotective effects via anti-apoptosis in hypoxic-ischemic brain injury in neonatal rats
Ji Eun Jeong, Tae Yeol Kim, Hye Jin Park, Kye Hyang Lee, Kyung Hoon Lee, Eun Jin Choi, Jin Kyung Kim, Hai Lee Chung, Eok Su Seo, Woo Taek Kim
Clin Exp Pediatr. 2009;52(12):1337-1347.   Published online December 15, 2009
Purpose : Taurine (2-aminoethanesulfonic acid) is a simple sulfur-containing amino acid. It is abundantly present in tissues such as brain, retina, heart, and skeletal muscles. Current studies have demonstrated the neuroprotective effects of taurine, but limited data are available for such effects during neonatal period. The aim of this study was to determine whether taurine could reduce hypoxic-ischemic (HI) cerebral...
Anti-tumor effect of new compound, 127, through the induction of apoptosis
Ki Hwan Baek, A Lum Han, Sae Ron Shin, Chun Mae Jin, Young Wook Yoon, Seung Taek Yu, Jong Duk Kim, Du Young Choi
Clin Exp Pediatr. 2009;52(6):696-700.   Published online June 15, 2009
Purpose : We screened more than 350 compounds with an endoperoxide ring structure in search of an anti-leukemic drug and found that compound 127 (c-127) could induce significant cytotoxicity in HL-60 cells. In this study, we investigated the molecular mechanisms of compound 127-induced antitumor activity on HL-60 cells. Methods : HL-60 cells were cultured in Rosewell Park Memorial Institute 1640...
Effect of growth hormone on neuronal death in hippocampal slice cultures of neonatal rats exposed to oxygen-glucose deprivation
Kyung Sik Hong, Jihui Kang, Myeung Ju Kim, Jeesuk Yu, Young Pyo Chang
Clin Exp Pediatr. 2009;52(5):588-593.   Published online May 15, 2009
Purpose : To investigate whether growth hormone (GH) has a protective effect on neurons in hippocampal slice cultures of neonatal rats exposed to oxygen-glucose deprivation (OGD). Methods : Cultured hippocampal slices of 7-day-old rats were exposed to OGD for 60 min. Then, the slices were immediately treated with three doses of GH (5, 50, or 500 µM) in media. The...
Iron chelating agent, deferoxamine, induced apoptosis in Saos-2 osteosarcoma cancer cells
Eun Hye Park, Hyo Jung Lee, Soo Yeon Lee, Sun Young Kim, Ho Keun Yi, Dae Yeol Lee, Pyoung Han Hwang
Clin Exp Pediatr. 2009;52(2):213-219.   Published online February 15, 2009
Purpose : Iron is a critical nutritional element that is essential for a variety of important biological processes, including cell growth and differentiation, electron transfer reactions, and oxygen transport, activation, and detoxification. Iron is also required for neoplastic cell growth due to its catalytic effects on the formation of hydroxyl radicals, suppression of host defense cell activities, and promotion of...
Injury of neurons by oxygen-glucose deprivation in organotypic hippocampal slice culture
David Chanwook Chung, Kyung Sik Hong, Jihui Kang, Young Pyo Chang
Clin Exp Pediatr. 2008;51(10):1112-1117.   Published online October 15, 2008
Purpose : We intended to observe cell death and apoptotic changes in neurons in organotypic hippocampal slice cultures following oxygen-glucose deprivation (OGD), using propidium iodide (PI) uptake, Fluoro-Jade (FJ) staining, TUNEL staining and immunofluorescent staining for caspase-3. Methods : The hippocampus of 7-day-old rats was cut into 350 µm slices. The slices were cultured for 10 d (date in vitro, DIV...
Neuroprotective effects of resveratrol via anti-apoptosis on hypoxic-ischemic brain injury in neonatal rats
Jin Young Shin, Min Ae Seo, Eun Jin Choi, Jin Kyung Kim, Eok Su Seo, Jun Hwa Lee, Hai Lee Chung, Woo Taek Kim
Clin Exp Pediatr. 2008;51(10):1102-1111.   Published online October 15, 2008
Purpose : Resveratrol, extracted from red wine and grapes, has an anti-cancer effect, an antiinflammatory effect, and an antioxidative effect mainly in heart disease and also has neuroprotective effects in the adult animal model. No studies for neuroprotective effects during the neonatal periods have been reported. Therefore, we studied the neuroprotective effect of resveratrol on hypoxic-ischemic brain damage in neonatal...
Capsaicin induced apoptosis and the enhanced anticancer effect of anticancer drugs in cancer cells
Sun Young Kim, You Jin Lee, Eun Hye Park, Ho Keun Yi, Dae Sun Jo, Jung Soo Kim, Pyoung Han Hwang
Clin Exp Pediatr. 2008;51(3):307-314.   Published online March 15, 2008
Purpose : Capsaicin, the major pungent ingredient in red pepper, has long been used in spices and food additives. It has been recently shown to induce apoptosis in several cell lines through a not well known mechanism. The aim of this study was to investigate the apoptosis-inducing effect of capsaicin on gastric cancer cells, and to provide valuable information concerning...
Neuroprotective effects of geneticin (G418) via apoptosis in perinatal hypoxic-ischemic brain injury
Mi Ju, Hyun Ju Lee, Sun Ju Lee, Eo Su Seo, Hye Jin Park, Kye Yang Lee, Gyeong Hoon Lee, Eun Jin Choi, Jin Kyung Kim, Jong Won Lee, Hai Lee Chung, Woo Taek Kim
Clin Exp Pediatr. 2008;51(2):170-180.   Published online February 15, 2008
Purpose : Some antibiotics were known to exert neuroprotective effects in the animal model of hypoxic-ischemic (H-I) brain injury, but the mechanism is still unclear. A recent study reported that geneticin (G418), an aminoglycoside antibiotic, increased survival of human breast cancer cells by suppressing apoptosis. We investigated the neuroprotective effects of systemically administrated geneticin via anti-apoptosis following the H-I brain...
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...
Possible Neuroprotective Role of Exogenous Growth Hormone on Hypoxic-Ischemic Brain Injury in Neonatal Rats
Young Pyo Chang, Mi Kyung Jung, Youn Hee Jee, Jae Ju Cho, Soon Bum Lee, Woo Sung Park, Jong-Wan Kim, Dong Hoon Shin
Clin Exp Pediatr. 2004;47(11):1210-1215.   Published online November 15, 2004
Purpose : This study was performed to evaluate the possible neuroprotective effect of exogenous growth hormone on hypoxic-ischemic brain injury in neonatal rats. Methods : After ligation of the right common carotid artery, seven-day old Sprague-Dawley rats(n= 75) were exposed to 8% oxygen for two hours. In a growth hormone(GH)-treated group(n=25), each animal was subcutanously injected by GH(50 mg/kg, Grotrpin ,...
Synergistic Cytotoxicity of Arsenic Trioxide and Sulindac Against Neuroblastoma
Du Young Choi
Clin Exp Pediatr. 2004;47(9):1002-1007.   Published online September 15, 2004
Purpose : Recent clinical studies have shown that arsenic trioxide(As2O3) at low concentrations induces complete remission without significant toxicity in patients with refractory acute promyelocytic leukemia(APL). Like APL cells, neuroblastoma(NB) cells are thought to be arrested at an early stage of differentiation, and can respond with retinoic acid treatment. Sulindac, a nonsteroidal antiinflammatory drug, was reported to induce antitumor activity...
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...
Effects of Endothelin A Receptor Antagonist to Cellular Proliferation and Apoptosis in Neonatal Rat Heart
Byung Min Choi, Kee Hwan Yoo, Young Sook Hong, Joo Won Lee, Soon Kyum Kim
Clin Exp Pediatr. 2003;46(7):668-678.   Published online July 15, 2003
Purpose : In order to investigate the role of endothelins in the cardiac development, the present study was designed to examine the effects of endothelin A receptor(ETAR) antagonist to the cellular proliferation and apoptosis in the neonatal rat heart. In addition, the expression of various regulatory genes in protein and mRNA levels by ETAR antagonist were examined. Methods : Neonatal...
Repetition of Apoptosis Induced by Amiloride Derivatives in Human Umbilical Vein Endothelial Cells
Kyu Chang Park, Kyu Sang Park, Soo Jee Moon
Clin Exp Pediatr. 2003;46(1):56-66.   Published online January 15, 2003
Purpose : Human umbilical vein endothelial cells(HUVECs) play an important role in regulating blood flow by releasing vasoactive substances. It has been reported that endothelial impairment and dysfunction might be a primary cause of placental vascular disease, which is manifested clinically as preeclampsia in mother and intrauterine growth restriction in fetus. Furthermore, the frequency of apoptotic changes is increased in...
The Effect of Tumor Necrosis Factor-α in Cultured Neonatal Rat Cardiomyocytes
Su Jin Kim, Dong Seok Lee, Ok Ko, Il Soo Mun, Bok Hyun Ko, Yong Wook Jung
Clin Exp Pediatr. 2001;44(11):1262-1268.   Published online November 15, 2001
Purpose : Tumor necrosis factor-α(TNF-α) is a pro-inflammatory cytokine that has been implicated in the pathogenesis of cardiovascular disease. Serum levels of TNF-α are elevated in many human cardiac related pathogenic conditions, including heart failure. It is well known that TNF-α inhibits myocardial contractility and induces apoptosis of adult rat cardiomyocytes via stimulation of TNF receptor 1. But pathophysiologically relevant...
IGF-I on the Expression of Gene Associated with Hypoxic Ischemic Brain Injury in the Neonatal Rats
Hyung-Shin Lee, Sang-Hyun Byun, Ren Zhe Ann, Kyu-Sang Song, Young-Ik Lee, Yoo-Jung Hahn, Yong-Hun Chung
Clin Exp Pediatr. 2001;44(7):796-807.   Published online July 15, 2001
Purpose : To investigate the effect of intraperitoneal injection of IGF-I after hypoxic ischemic brain injury on neuronal cell necrosis, apoptosis and expression of proapoptotic and antiapoptotic proteins bax and bcl-2, respectively. Methods : The right carotid artery was cut between the double ligation. Then allowed to recover for 30 minutes followed by exposure to 8% oxygen at 37℃ for...
The Changes of Apoptosis and Viability in Stem Cells after Thawing with Lapse of the Time
Seun Joo Park, Sang Young Bae, Kyung Ha Ryu, Il Tae Whang, Kyung Hyo Kim, Young Mi Hong, Kyung Hee Kim, Keun Lee, Joo Young Seoh
Clin Exp Pediatr. 2000;43(12):1576-1582.   Published online December 15, 2000
Purpose : Thawed stem cells should be infused as early as possible because delay of infusion leads to decrease of cell viability and formation of DNA clumping. The procedure of 10% Dimethyl sulfoxide(DMSO) removal and a long distance from the thawing location to the patient are the main causes of delay of infusion that results in the loss of cell...
Induction of Apoptosis of Ewing`s Sarcoma Cells by Regulating Fusion Protein Expression
Ho Keun Yi, Ran Ju Kim, Dae Yeol Lee, Jung Soo Kim, Pyoung Han Hwang
Clin Exp Pediatr. 2000;43(7):942-951.   Published online July 15, 2000
Purpose : Fusion genes(EWS-Fli-1 and EWS-erg ) function as transcription activators and are essential for maintaining tumorigenic properties in Ewing`s sarcoma cells. Several reports have noted that Ets family transcription factors bind with CBP(CREB binding protein) in vitro. To understand the interaction of fusion proteins and CBP, we studied the CBP protein in TC135 cells expressing the EWS-Fli-1 gene. We...
Protective Effect of Probucol against Adriamycin-Induced Apoptosis in Cultured Rat Cardiac Myocytes
Sun-Ju Lee, Dong-Seok Lee, Yong-Wook Jung
Clin Exp Pediatr. 2000;43(6):746-754.   Published online June 15, 2000
Purpose : In adriamycin(ADR)-induced cardiomyopathy, several different mechanisms are suggested. However, little information is available regarding the role of apoptosis. In the present study, we examined the induction of apoptosis on ADR treatment and anti-apoptotic effects of probucol, a lipid-lowering drug, and we also studied the changes of bcl-2 expression in order to see the molecular mechanisms underlying the effect...
Apoptosis of Peripheral Blood Mononuclear Cells in Different Ages of Normal Children
Dong Soo Kim, Hyun Young Kim, John A Linton
Clin Exp Pediatr. 2000;43(4):463-469.   Published online April 15, 2000
Purpose : To survive in an ecological environment, an individual must develop immunity to various antigens. Therefore, populations of peripheral blood mononuclear cells(PBMC) in humans change continuously with growth. The object of this study is to evaluate the apoptosis of peripheral blood mononuclear cells(PBMC) in normal children of different ages. Methods : PBMC were isolated from the study groups. Ten...
Apoptosis of Cord Blood Mononuclear Cells Infected with Enterovirus
Dong Soo Kim
Clin Exp Pediatr. 2000;43(3):372-379.   Published online March 15, 2000
Purpose : To evaluate apoptosis of cord blood mononuclear cells(CBMC) infected with enterovirus. Methods : Cord blood was obtained from 20 neonates which were delivered vaginally without any complications. Cord blood mononuclear cells(CBMC) were isolated, and after 24h and 48h incubation, cells were stained with Annexin V and Propidium Iodide and were analyzed with FACScan flowcytometer. CBMCs were also incubated with...
The Apoptosis and Expression of Bcl-2, Bcl-xS, Bax Proteins in Fetal Brain after Treating Pregnant Mice with Endotoxin
Sung Min Cho, Seung Sook Kim, Young Seung Hwang
Clin Exp Pediatr. 2000;43(1):97-104.   Published online January 15, 2000
Purpose : Apoptosis is active cell death which plays an important role in developing normal tissues. Various conditions such as genetic defects, drugs, ischemia or infections are known to induce apoptosis. We studied the effect of maternal infection on fetal brain development during pregnancy. Methods : We treated 46 C3H pregnant mice with lipopolysaccharide(LPS) or phosphat-buffered saline and observed the changes in apoptosis and...
Apoptosis, P53, bax and Bcl-2 Protein Expressions in Neonatal rat Hippocampus by Kainic Acid-induced Seizure
Shin Weon Yun, Soo Ahn Chae, Eung sang Choi, Byoung Hoon Yoo
Clin Exp Pediatr. 2000;43(1):85-96.   Published online January 15, 2000
Purpose : Apoptosis is a process of active cell death which has been suggested to be part of hippocampal cell loss caused by kainic acid(KA). Immature rats showed higher susceptibility and mortality to KA but did not develop recurrent seizure, long term behavioral or neuropathologic changes. We investigated whether this was due to age-dependent resistance, and elucidated the molecular mechanics which mediate P53-induced apoptosis,...
Effects of Angiotensin Converting Enzyme Inhibition into Apoptosis and Related Genes in the Neonatal Rat Kidney
Kee Hwan Yoo, Haewon Cheon, Byung Min Choi, Young Sook Hong, Joo Won Lee, Soon Kyum Kim
Clin Exp Pediatr. 1999;42(8):1086-1095.   Published online August 15, 1999
Purpose : The renin-angiotensin system plays an important role in renal growth and development. Exposuring the neonate to angiotensin converting enzyme(ACE) inhibitor increases mortality and results in growth retardation and abnormal renal development. ACE inhibition in the developing kidney reduces the renal expression of TGF-β1 and EGF, which may account for renal growth impairment. This study was designed to...
Effects of Thioredoxin on Apoptosis-Inducing Neuronal Cell Injury
Hyunmi Kim, Gyoung Hee Kim, Yoon Song Lee
Clin Exp Pediatr. 1999;42(6):825-832.   Published online June 15, 1999
Purpose : Thioredoxin is an endogenous antioxidant. It regulates the activities of transcriptional factors such as NF-kB(nuclear factor kappa B)and AP-1(activator protein-1) and it increases the synthesis of cytokines, preventing cellular proliferation and apoptosis. The aim of this study was to clarify the role of thioredoxin on apoptosis-inducing neuronal cell injury. We investigated the protective effects of thioredoxin against apoptosis-inducing...
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