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전승정,김태헌,류민선,오다연,송명은,이신아,류재인,김혜인,문일환,유권 이화여자대학교 의과학연구소 2011 EMJ (Ewha medical journal) Vol.34 No.2
The causes of pyogenic liver abscess has been known as biliary tract disease or intrabadominal infection but the large proportions of the patients has no apparent underlying disorders. Recently colonic mucosal lesions were reported in patients with cryptogenic liver abscess and it has been suggested that colonic mucosal break may play a role in developing liver abscess in otherwise healthy patients. We experienced a patient of severe recurrent liver abscess complicated with endophthalmitis only 3 months after successful treatment of initial cryptogenic liver abscess and a polypoid colon cancer was discovered by chance. It seems prudent to proceed colonoscopic examination in patients with cryptogenic liver abscess especially when it is recurrent.
Da Eun Kwon,Song Soo Kim,Shinhye Cheon,Jin Hwan Kim,Hyeyoung Kwon 대한영상의학회 2023 대한영상의학회지 Vol.84 No.5
Abscess formation due to Candida albicans infection is extremely rare. Radiological diagnosis of an atypical abscess at an uncommon site is challenging. In this study, we present a case of insidious onset multifocal chest wall and spinal abscess after candidemia in a young woman in the intensive care unit due to postpartum bleeding.
Kwon, Da Hye,Cha, Hee-Jae,Choi, Eun Ok,Leem, Sun-Hee,Kim, Gi-Young,Moon, Sung-Kwon,Chang, Young-Chae,Yun, Seok-Joong,Hwang, Hye Jin,Kim, Byung Woo,Kim, Wun-Jae,Choi, Yung Hyun UNKNOWN 2018 INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE Vol.41 No.1
<P>Schisandrin A is a bioactive lignan occurring in the fruits of plants of the <I>Schisandra</I> genus that have traditionally been used in Korea for treating various inflammatory diseases. Although the anti-inflammatory and antioxidant effects of lignan analogues similar to schisandrin A have been reported, the underlying molecular mechanisms have remained elusive. In the present study, schisandrin A significantly suppressed the lipopolysaccharide (LPS)-induced production of the key pro-inflammatory mediators nitric oxide (NO) and prostaglandin E<SUB>2</SUB> by suppressing the expression of inducible NO synthase and cyclooxygenase-2 at the mRNA and protein levels in RAW 264.7 macrophages. Furthermore, schisandrin A was demonstrated to reduce the LPS-induced secretion of pro-inflammatory cytokines, including tumor necrosis factor-α and interleukin-1β; this was accompanied by a simultaneous decrease in the respective mRNA and protein levels in the macrophages. In addition, the LPS- induced translocation of nuclear factor-κB (NF-κB), as well as activation of mitogen-activated protein kinases (MAPKs) and phosphatidylinositol-3 kinase (PI3K)/Akt pathways were inhibited by schisandrin A. Furthermore, schisandrin A significantly diminished the LPS-stimulated accumulation of intracellular reactive oxygen species, and effectively enhanced the expression of NF erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1). These results suggested that schisandrin A has a protective effect against LPS-induced inflammatory and oxidative responses in RAW 264.7 cells by inhibiting the NF-κB, MAPK and PI3K/Akt pathways; these effects are mediated, at least in part, by the activation of the Nrf2/HO-1 pathway. Based on these results, it is concluded that schisandrin A may have therapeutic potential for treating inflammatory and oxidative disorders caused by over-activation of macrophages.</P>
Da Eun Kwon,Da Mi Kim,Chang June Song,In Ho Lee,Yong Min Kim 대한영상의학회 2024 대한영상의학회지 Vol.85 No.1
Respiratory epithelial adenomatoid hamartoma (REAH) in the head and neck is a rare benign lesion containing glandular tissue covered with ciliated respiratory epithelium. In the head and neck, REAH of the nasal cavity, paranasal sinuses, and nasopharynx have been reported in literature. Due to rareness of REAH and insufficient knowledge of its imaging features, the diagnosis can be challenging when we encounter a non-specific cystic mass at an uncommon site in the head or neck. Here, we report the case of a pathologically confirmed REAH showing a cystic mass centered at the buccal space (retromaxillary fat pad) with CT and MRI findings.
Radon Potential Mapping in Groundwater using Logistic Regression: a Case Study in Goesan, Korea
( Da Eun Kwon ),( Jae Hong Hwang ),( Jae Hyuk Jeong ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
The purpose of this study is to calculate the relationship between spatial factors and radon levels in groundwater, and to integrate these relationships to create a radon potential map of Goesan, where in Korea, through probabilistic models and geographic information system. Radon in groundwater is affected by topographical, geological and geochemical factors, and many related factors can be identified by frequency ration. Spatial databases such as radon, topographical, geological and geochemical data in the study area are collected by GIS. The relationship between radon levels and these factors is assessed by logistic regression, one of the statistical models. And the related factors are overlayed to create radon potential map. This radon potential map is verified against the existing radon gas generation, 70% of the total radon generations are used for mapping and the remaining 30% are used for model validation. The radon concentration unit in the study area is Bq / L and the average of radon concentration used in mapping is 119 Bq / L. The US Environmental Protection Agency (US EPA) standard which is 148 Bq / L is 24.37% higher than the average of radon concentration used in mapping. The radon potential map constructed in this study can be an important reference for potential exposure about radon in groundwater.