• Experimental and Molecular Medicine
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• 제50권11호
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• pp.13.1-13.15
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• 2018

Wound healing is delayed in diabetic patients. Increased apoptosis and endothelial progenitor cell (EPC) dysfunction are implicated in delayed diabetic wound healing. Melatonin, a major secretory product of the pineal gland, promotes diabetic wound healing; however, its mechanism of action remains unclear. Here, EPCs were isolated from the bone marrow of mice. Treatment of EPCs with melatonin alleviated advanced glycation end product (AGE)-induced apoptosis and cellular dysfunction. We further examined autophagy flux after melatonin treatment and found increased light chain 3 (LC3) and p62 protein levels in AGE-treated EPCs. However, lysosome-associated membrane protein 2 expression was decreased, indicating that autophagy flux was impaired in EPCs treated with AGEs. We then evaluated autophagy flux after melatonin treatment and found that melatonin increased the LC3 levels, but attenuated the accumulation of p62, suggesting a stimulatory effect of melatonin on autophagy flux. Blockage of autophagy flux by chloroquine partially abolished the protective effects of melatonin, indicating that autophagy flux is involved in the protective effects of melatonin. Furthermore, we found that the AMPK/mTOR signaling pathway is involved in autophagy flux stimulation by melatonin. An in vivo study also illustrated that melatonin treatment ameliorated impaired wound healing in a streptozotocin-induced diabetic wound healing model. Thus, our study shows that melatonin protects EPCs against apoptosis and dysfunction via autophagy flux stimulation and ameliorates impaired wound healing in vivo, providing insight into its mechanism of action in diabetic wound healing.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제4권2호
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• pp.233-237
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• 2001

저자들은 발열, 구토 및 설사를 주소로 내원한 14개월된 여아의 대변배양검사에서 Aeromonas hydrophilia가 배양된 gas forming enterocolitis를 동반한 가와사끼병 1례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다.

• 아동학회지
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• 제20권2호
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• pp.3-19
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• 1999

The Revised Classroom Play(RCP) scale was validated for Korean 4th grade students. 104 boys and 80 girls took the translated RCP. Test-retest reliability was established with 41 children after 2 months, and test of criterion-related validation was established by the Social Behavior Scale administered to 71 children. All raw scores were standardized by classroom and sex to adjust for differences in the number of nominators and nominatees. The structure of the RCP resulted in 3 factors, 'sociability-disruptive' and 'shy-isolated', with 28 items similar to the original RCP 3 factors. For criterion-related validity, the correlations between the 3 factors of the RCP and the 3 factors of the Social Behavior Scale were positive. For internal consistencies, Cronbach's ${\alpha}$ of the RCP factors ranged from .77 to .94. Test-retest reliability coefficients ranged from .33 to .51. Analyses of variance revealed good item discrepancies for all 28 items. These results confirm the RCP as a valid and reliable measure of the quality of peer relations.

• 전기학회논문지
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• 제56권2호
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• pp.415-419
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• 2007

Data compression is very important for the storage and transmission of informations. EZW image compression algorithm has been widely used in real application due to its high compression performance. In the EZW algorithm, when a new significant coefficient is generated, its children are all encoded, although its all descendants may be insignificant, and thus its performance is declined. In this paper, we proposed an improved EZW algorithm using IS(Isolated Significant) symbol, which checks all descendants of significant coefficient and avoids encoding the children of each newly generated significant coefficient if it has no significant descendant.

• 한국식생활문화학회지
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• 제12권4호
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• pp.411-417
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• 1997

A survey of 28 school foodservice establishments in Seoul and Kangnung was undertaken and detailed information was collected from 3,590 elementary school students. Childrert's satisfaction with the quality of school food was evaluated by questionnaires. It was measured by assessing 15 variables. Statistical data analysis was using SAS package program for descriptive analysis and T-test. Elementary schools in Seoul were all located in urban areas, whereas elementary schools in Kangnung were in urban areas (40.4%), provincial areas (40.0%) and in isolated areas (20.0%). Children seemed to be generally satisfied with the food served, with the lowest score of milk. Mean wastes for soups and Kimchi were found to be larger than those for milk and side dishes. The major reasons for leaving leftover were 'dislike the food (27.4%)'>'too big portion size (23.6%)'>'food is not tasty (19.2%)'>'low appetite (17.6%)'>'food is too overcooked or undercooked (3.9%)'>'food is not hot enough (3.2%)' in order.

• Pediatric Infection and Vaccine
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• 제7권1호
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• pp.94-107
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• 2000

목 적 : 우리나라 하기도 감염 소아에서 분리되는 아데노바이러스 각 혈청형의 유행 양상과 아데노바이러스에 의한 하기도 감염의 임상적 특징을 알아보고자 한다. 방 법 : 1990년 11월부터 1998년 2월까지 호흡기 감염증상을 주소로 서울대학교 어린이병원 소아과를 내원한 환아들을 대상으로 비흡인물을 채취하여 단일 클론항체를 이용한 면역 형광염색법 및 HEp-2 세포주를 이용한 바이러스 배양법으로 87례의 아데노바이러스에 의한 호흡기 감염증을 진단하고, 분리된 바이러스는 중화 항체 시험으로 혈청형을 결정하였다. 아데노바이러스 감염증이 확인되고 혈청형 결정 시험이 시행된 84명의 환아 중에서 혼합감염과 병록 고찰이 불가능한 환아들을 제외한 74명의 환아들의 병록 고찰을 하였다. 결 과 : 혈청형 검사가 시행된 84례 중에 7형이 36례로 가장 많았다. 그리고 나머지는 혈청형 1은 3례, 혈청형 2는 13례, 소아 혈청형군이 13례, 기타 혈청형군이 12례였다. 혈청형 7형은 95년 10월부터 97년 초까지 유행성으로 발병하였고 그 외의 다른 혈청형은 7형이 유행할 당시에는 거의 분리되지 않았다. 그 외의 기간 동안에는 98년을 제외하고는 7형은 분리되지 않았고 주로 2형과 3형이 연중 산발적으로 발생하였다. 환아의 평균 연령은 1년 11개월로 주로 6개월에서 5세 사이였고 6개월 이하의 영아도 14례 있었다. 아데노바이러스에 의한 폐렴의 흉부방사선 소견은 폐나 폐문 주위의 침윤, 과환기, 무기폐, 폐경화 등의 다양한 형태로 나타났으며, 정상소견도 있었다. 그러나 7형의 경우는 세균성 폐렴과 구별이 어려울 정도의 병변으로 폐경화와 늑막 삼출, 그리고 대엽성이나 소엽성 무기폐 등이 관찰되었고 양측 폐야를 동시에 침범한 경우도 7형에서 20례(55%)에서 있었다. 호흡곤란으로 인공호흡기 치료를 받는 경우는 혈청형 7의 36례 중의 14례(38.9%)였다. 사망한 환자는 총 9명(12%)이었고 그 중 호흡 부전으로 사망한 경우는 7명(9.4%)였다. 그 중 7례는 혈청형 7이 분리되었고 소아 혈청형군 1례와 2형이 1례씩 있었다. 결 론 : 아데노바이러스는 주로 6개월에서 5세사이의 소아에서 심한 호흡기 감염을 일으키며, 특히 혈청형 7형에 의한 심한 폐렴이나 선행질환으로 선선청 심질환이나 면역 기능이 저하된 경우 혹은 만성 폐질환을 앓는 경우에 사망과도 연관되는 것으로 생각된다. 과거 5년간 관찰되지 않던 7형에 의한 폐렴은 유행성으로 많은 정상 환아에서도 사망이나 심각한 후유증을 초래하였으므로 앞으로 이에 대한 진단과 치료 뿐만 아니라 예방에 대한 연구를 더욱 진행시켜야 할 것으로 생각된다.

• Journal of Yeungnam Medical Science
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• 제26권1호
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• pp.78-83
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• 2009

Fibromuscular dysplasiais an uncommon condition of idiopathic, non-inflammatory and non-atherosclerotic disease of the musculature of arterial walls. The disease is rare, but it commonly affects young and middle aged women. Isolated intracranial cerebral fibromuscular dysplasia is extremely rare because cerebral fibromuscular dysplasia usually affects extracranial vessels. A 20-year-old woman was admitted with light hemiplegia and global aphasia. Brain MRI and MRA demonstrated acute left middle cerebral artery territory infarction with a multifocal stenosis and dilatation of the left middle cerebra artery and left internal carotid. The characteristic conventional cerebral angiographic findings demonstrated a typical string-of-beads appearance in the left distal internal carotid artery and proxiaml portion of the left middle cerebral artery, which suggested a medial type fibromuscular dysplasia. We report a case of isolated intracranial fibromuscular dysplasia with left middle cerebral artery territory infarction. Fibromuscular dysplasia should he considered as a stroke risk factors in children and young adults, especially in patients with no known cardiovascular risk factors.

• Clinical and Experimental Pediatrics
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• 제57권2호
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• pp.91-95
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• 2014

Griscelli syndrome type 2 (GS2) is a rare autosomal recessive disease caused by mutations in the RAB27A gene. It is characterized by cutaneous hypopigmentation, immunodeficiency, and hemophagocytic lymphohistiocytosis. We describe 2 brothers who had GS2 with clinically diverse manifestations. The elder brother presented with a purely neurological picture, whereas the younger one presented with fever, pancytopenia, hepatosplenomegaly, and erythema nodosum. Considering that cutaneous hypopigmentation was a common feature between the brothers, genetic analysis for Griscelli syndrome was performed. As the elder sibling had died, mutation analysis was only performed on the younger sibling, which revealed a novel homozygous mutation in the RAB27A gene on chromosome 15 showing a single-base substitution (c.136T>A p.F46I). Both parents were heterozygous for the same mutation. This confirmed the diagnosis of GS2 in the accelerated phase in both siblings. The atypical features of GS2 in these cases are a novel mutation, isolated neurological involvement in one sibling, association with erythema nodosum, and 2 distinct clinical presentations in siblings with the same genetic mutation.

• Archives of Plastic Surgery
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• 제33권1호
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• pp.67-74
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• 2006

Palatoplasty using Furlow's double-opposing Z-plasty has been performed from June, 1995 to September, 1999 at Seoul National University Children's Hospital. The goal of this study is to determine the optimal timing of repair and cleft severity affecting velopharyngeal function. This is the retrospective study of patients operated by the second author. The mean age of patients was 10.53 months. The patients could be divided into three groups-isolated cleft palate(n=70), unilateral cleft lip and palate(n=88), and bilateral cleft lip and palate(n=42). To evaluate the velopharyngeal function, we used two parameters, speech evaluation and cineofluorography using DSR(digital subtraction radiography). Also, to determine the relevance between cleft severity and speech development, we measured the distance between maxillary tuberosities and cleft margins. Among 200 patients, about 96% had no or minimal hypernasality and 87% had no or mild nasal emission. The cleft width and length of soft palate seemed not to be related with the speech development. Palatoplasty at the age under 12 months resulted in less 'nasal emission' and better 'articulation' of the parameters that were assessed at the age of 7 years. It can be concluded Furlow palatoplasty shows satisfactory results and also it seems that it is better to perform the operation before the age of 12 months.

• Archives of Pharmacal Research
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• 제27권2호
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• pp.246-253
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• 2004

The prevalence, genotype for antibiotic resistance and antibiotic susceptibility of vancomycin resistant enterococci (VRE) were determined. And molecular typings of the Enterococcus faecium isolates were analyzed. Prevalence of VRE in chickens, healthy children and intensive care unit (ICU) patients was 41.6％,7.9％, and 20.4％, respectively. Forty out of 54 isolates from chicken intestines, and 9 out of 11 from ICU patients were identified as Enterococcus faecium. Eleven out of 13 isolates from non-hospitalized young children were E. gallinarium. Twelve strains of E. faecalis were isolated from chicken intestines. The gene for the antibiotic resistance in E. faecium, and E. faecalis was vanA, while that in E. gallinarium was vanC1. E. faecium isolates were resistant to most of antibiotics except ampicillin and gentamicin. Molecular typing of the E. faecium strains obtained by pulse field gel electrophoresis and repetitive sequence-based PCR suggest that VRE transmit horizontally from poultry to humans, especially young children, via the food chains in Korea.