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윤현아 ( Hyun Ah Yoon ),최석렬 ( Seok Reyol Choi ),이종훈 ( Jong Hun Lee ),장진석 ( Jin Seok Jang ),백양현 ( Yang Hyun Baek ),이정민 ( Jeong Min Lee ),김민식 ( Min Sik Kim ) 대한내과학회 2011 대한내과학회지 Vol.80 No.5
Glomus tumors originate in modified vascular smooth muscle cells and are most commonly found in the dermis or subcutis but are rarely observed in the stomach. We report three cases of patients who presented with incidental findings of subepithelial tumors in the stomach. One patient showed a positive cushion sign, and the others showed negative cushion signs. Endoscopic ultrasonography (EUS) demonstrated sharply demarcated hypoechoic tumors with internal hyperechoic spots in the fourth layer of the gastric wall and several hypoechoic halos around the tumors. Contrast-enhanced abdominal computerized tomography (CT) showed homogeneous high enhancement of tumors up to the delayed scan, and one case showed calcification in the tumor. For treatment, laparoscopic wedge resections were performed. Histological and immunochemical analysis of the tumor cells were compatible with glomus tumors. These characteristic findings in EUS and CT seem to be useful for the diagnosis of gastric glomus tumors.
Porphyromonas gingivalis에 대한 레몬그라스 오일 및 레몬그라스 에탄올 추출물의 항균 활성
윤현서(Hyun-Seo Yoon),박충무(Chung-Mu Park) 한국구강보건과학회 2023 한국구강보건과학회지 Vol.11 No.1
Objectives: This study analyzed the antibacterial effects of LGEE and LGEO against P. gingivalis, thus the potential utility was evaluated as the functional materials for oral healthcare. Methods: Nitric oxide (NO) assay and cytotoxicity were analyzed by the Griess reaction and WST-1 assay, respectively. Antibacterial activity against P. gingivalis was evaluated by disk diffusion method and proliferation inhibition assay. Results: LGEO and LGEE significantly inhibited NO production as well as the proliferation of P. gingivalis in a dose dependent manner. Conclusions: LGEO and LGEE inhibited potently NO production and P. gingivalis proliferation, which means they could be used as a numerous lines of functional materials for improving oral health.
일부지역 대학생의 구강보건지식과 구강건강인식에 대한 조사
윤현서(Hyun-Seo Yoon),남유영(You-Young Nam),유현아( Hyun-A Ryu),김혜진(Hye-Jin Kim),이민경(Min-Kyung Lee),이정화(Jung-Hwa Lee) 한국구강보건과학회 2013 한국구강보건과학회지 Vol.1 No.1
The purpose of this study was to survey the oral health knowledge and the oral health perception of university students in some districts. It divided it into by department for one month in March of 2013, surveyed totally 310 people, and then finally analyzed 302 people. The results are as follows. In the oral health care knowledge, a percentage of correct answers as saying of needing to receive regular check-up once per 6 months was the highest with 97.7%. A percentage of correct answers as saying that food of containing lots of sugar is good for health of teeth was the lowest with 10.9%. The oral health knowledge according to general characteristics was high in women(p=0.036). The age was the highest in 21-22 years old and was the lowest in 25-27 years old(p=0.001). In department, the health department was indicated to be the highest. The natural-science department was indicated to be low, thereby having shown difference(p<0.001). In academic year, sophomore was the highest. Senior was indicated to be the lowest(p=0.030). A case of non-smoking was high in knowledge level(p=0.027). A case of not having part-time job was indicated to be high in knowledge level(p=0.032). A case of recognizing that the whole health status is very healthy was low in oral health perception level(p<0.001). The more perception as saying that the oral health status is very healthy led to the lower even in the oral health perception level(p<0.001). To improve the oral health of college students develop a systematic curriculum and teaching methods are needed for the distressed people.
Anti-inflammatory activity of various seaweeds in LPS-PG stimulated HGF-1 cells
윤현서(Hyun-Seo Yoon),김혜진(Hye Jin Kim),박충무(Chung-Mu Park) 한국구강보건과학회 2020 한국구강보건과학회지 Vol.8 No.4
Objectives: Many seaweeds are considered important natural resources since their abundant bioactive compounds. The present study tried to analyze the anti-inflammatory activity of several seaweeds in the human gingival fibroblast (HGF)-1 cells. Methods: Lipopolysaccharide from Porphyromonas gingivalis (LPS-PG), one of the main causes in the progression of periodontal inflammation, was applied to induce inflammatory response in HGF-1 cells. Nitric oxide (NO) was used as one of the hallmarks for inflammation, which was analyzed by the Griess reaction. The protein expression level of inducible NO synthase (iNOS) was identified by the Western blot analysis. Results: Inhibitory effect of NO production was investigated in the ethanol extracts of Asparagopsis taxiformis Trevisan de Saint-Léon (ATEE), Distromium decumbens (Okamura) Levring (DDEE), Galaxaura fastigiata (GFEE), Hypnea japonica Tanaka (HJEE), Myelophycus simplex (Harvey) Papenfuss (MSEE), and Scytosiphon canaliculatus (Setchell & N.L. Gardner) Kogame (SCEE) in LPS-PG stimulated HGF-1 cells. As a result, ATEE and HJEE the most potently inhibited while GFEE and SCEE slightly ameliorated NO production without any cytotoxicity. But, DDEE and MSEE did not exhibit the extraordinary NO inhibitory effect in LPS-PG induced HGF-1 cells. Western blot analysis was also conducted to identify the inhibitory effect of both extracts, ATEE and HJEE that sharply attenuated NO production, in LPS-PG induced HGF-1 cells. ATEE and HJEE mitigated iNOS expression in a dose dependent manner, which was in accordance with the result of NO production. Conclusions: ATEE and HJEE in the algal extracts used in this study drastically reduced the LPS-PG-induced inflammatory response in HGF-1 cells. All of this ATEE and HJEE will be used as candidate substances for treatment and prevention of periodontal disease.
부산지역 65세 이상 노인의 구강건강과 자가건강평가수준(SRH)
윤현서 ( Hyun Seo Yoon ),전진호 ( Jin Ho Chun ),이정화 ( Jung Hwa Lee ) 한국치위생과학회 2012 치위생과학회지 Vol.12 No.3
The purpose of this study was to examine the impact of the oral health status and health care of elderly people on their self-rated health(SRH). The subjects on this study were 479 senior citizens who were at the age of 65 and up and resided in the city of Busan. They got a dental checkup, and a survey was conducted by having an one-on-one interview. After the collected data were analyzed, the following findings were given: The senior citizens were diagnosed with a mean of 1.43 systemic diseases, and hypertension(51.8%) was the most prevalent disease among them, followed by diabetes(25.1%), arthritis(41.8%), oral diseases(75.6%), stroke(9.0%) and heart diseases(15.9%). Their self-rated health was better when they were male, when they were aged between 65 and 69, when there was someone with whom they lived, when they were better educated and when they owned their own houses. But their self-rated health was poorer when they felt more oral symptoms, when they had more missing teeth and when they needed both of maxillary and mandibular dentures. Their self-rated health was more positively affected when they were better educated(β=0.894), when they owned their own houses(β=4.220), when they got a dental checkup on a regular basis(β=2.997) and when the rate of their functional tooth was larger(β=0.081). And that was more negatively influenced when they had a denture(β=-1.110), when they had more oral symptoms(β=-1.590) and when they had more systemic diseases(β=3.363). There is a close relationship between the oral health and self-rated health of elderly people. Therefore how to promote their oral health should carefully be considered.