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Prevotella nigrescens의 용혈특성에 관한 연구
곽주석,장훈상,장석우,이수종,유용욱,민경산 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.4
세균의 용혈활성은 세균이 숙주 내에서 생존하기 위해 필요한 철을 획득하기위한 특성이며 기능면에서 볼 때 숙주에 대한 중요한 독력인자로 간주될 수 있다. 본 연구에서는 괴사치수 및 치근단 치주염으로 진단된 환자의 근관에서 분리한 Prevotella nigrescens의 용혈활성을 다양한 조건 하에서 측정하여 그 특성을 규명하는 것을 목적으로 한다. 1. 임상에서 분리한 P. nigrescers와 표준균주인 P. nigrescers ATCC 33563에서 모두 용혈활성이 나타났다. 2. 사람, 면양 및 말 세 가지 종에 대해 용혈활성을 비교한 결과 사람의 적혈구에서 가장 강한 용혈활성을 나타내었다. 3. 용혈소 억제제인 NaN₃와 dithiothreitol (DTT)는 농도의존적으로 P.nigrescers의 용혈활성을 감소시켰다 (p<0.05). 4. P. nigrescers가 최대 용혈활성을 나타내는 최적의 pH는 4이었으며, 50℃이하의 온도에서는 용혈활성을 보였으나 95℃에서 급격히 감소하였다. 5.배양조건에 따른 P. nigrescens의 용혈활성을비교한 결과 10% CO₂배양기에 배양한 경우혐기성 조건에서 배양한 것보다 더 높은 용혈활성을 보였다. Hemolytic property is a specific feature of bacteria to obtain iron which is essential for its survival in host tissues. Therefore, it is thought to be one of several factors of virulence. The purpose of this study was to investigate the hemolytic properties of Prevotella nigrescens isolated from the teeth diagnosed as pulp necrosis and apical periodontitis under the presence of hemolysin inhibitors such as NaN3 and dithiothreitol, heat, various pH and cultural conditions. The results were as follows; 1. Clinically isolated P. nigrescens strains and standard P. nigrscens ATCC 33563 showed hemolytic activity. 2. P. nigrescens showed higher hemolytic activity against human erythrocytes than sheep or horse erythrocytes. 3. NaN₃ and dithiothreitol (DTT) reduced the hemolytic activity of P. nigrescens in a dose dependent manner (p<0.05). 4. Optimal pH for the maximum hemolytic activity of P. nigrescens was 4.0 and the hemolysin was stable under the 50℃, but the hemolytic activity was significantly decreased at 95℃. 5. P. nigrescens cultured in 10% CO₂ condition showed higher hemolytic activity than the bacteria cultured in the anaerobic condition.[J Kor Acad Cons Dent 30(4):335-343,2005]
배일헌,한기석,차상훈,김성진,박길선,홍장수 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2
뇌혈관내 공기 색전증은 뇌혈관 조영술, 혈관내 도자술 시행시 발생하여 매우 심각한 합병증을 유발할 수 있다. 그러나 기흉의 합병증으로 발생한 경우는 보고된 적이 없다. 저자들은 기흉에 의하여 발생한 뇌혈관내 공기 색전증 1예를 경험하였기에 보고한다. Cerebral arterial air embolism is a potentially fatal event that may occur during the cerebral angiography and intravascular catheterization. The CT findings of cerebral arterial air embolism following pneumothorax have not been reported. We report a case of cerebral arterial air embolism following pneumothorax, and describe the CT findings.
배일헌,한기석,차상훈,김성진,박길선,이건국,홍장수 충북대학교 의과대학 충북대학교 의학연구소 2003 忠北醫大學術誌 Vol.13 No.2
선천성 낭성 선종양 기형은 태생 16주 이후 말단세기관지의 형성이 중단되어 미성숙기관지들과 중배엽성분들이 과도하게 증식하여 발생하는 드문 선천성 폐질환이다. CT소견은 낭종의 크기 숫자, 내용물 등에 따라 다양하나, 병변내에 정상적인 폐혈관이 보인 예는 전세계적으로 보고된 적이 없었다. 저자들은 역동적 흉부 CT상 균일한 저음영의 병변내에 정상 폐혈관상이 유지된 선천성 낭성 선종양 기형 1예를 경험하였기에 보고한다. Congenital cystic adenomatoid malformation(CCAM) is a rare pulmonary disease that is thought to be developed by abnormal proliferation of immature alveoli and other mesenchymal component from the abrupt halting of the terminal alveoli formation after 16 weeks of gestation. On CT scan, there are no consistencies regarding to size, numbers, and its contents but no cases were reported in past showing normal pulmonary vascularities. We reports a case of CCAM that showed normal pulmonary vascularities within the hypodense lesions on a dynamic chest CT
Jang, Se Yong,Chae, Shung Chull,Bae, Myung Hwan,Lee, Jang Hoon,Yang, Dong Heon,Park, Hun Sik,Cho, Yongkeun,Cho, Hyun-Jai,Lee, Hae-Young,Oh, Byung-Hee,Choi, Jin-Oh,Jeon, Eun-Seok,Kim, Min-Seok,Lee, San Elsevier 2018 INTERNATIONAL JOURNAL OF CARDIOLOGY Vol.266 No.-
<P><B>Abstract</B></P> <P><B>Background</B></P> <P>Renin-angiotensin system blockade (RAB) is the cornerstone in the management of patients with heart failure. However, the benefit of RAB in patients with accompanying severe renal impairment is not clear. We aimed to examine the effect of RAB and the differential effect of RAB depending on renal replacement (RR) in patients with severe renal insufficiency and acute heart failure.</P> <P><B>Methods and Results</B></P> <P>Among 5625 patients from the Korean Acute Heart Failure registry, 673 in-hospital survivors (70.9 ± 12.8 years, 376 men) who had left ventricular ejection fraction < 40% and estimated glomerular filtration rate < 30 mL/min/1.73 m<SUP>2</SUP> during hospitalization were analyzed. The inverse probability of treatment weighting (IPTW)-adjusted survival analysis was used to compare the composite of all-cause mortality and rehospitalization between patients with and without pre-discharge RAB. A total of 334 (49.6%) adverse events were observed during the 1-year follow-up. The IPTW-adjusted Kaplan-Meier survival analysis showed that the 1-year event rate was 48.7% and 53.8% for patients with RAB and those without, respectively (log rank p = 0.048). RAB was significantly related to better prognosis in patients receiving RR therapy (hazard ratio [HR] = 0.436 [0.269–0.706], p = 0.001), but not in patients not receiving RR therapy (HR 0.956 [0.731–1.250], p = 0.742) in a weighted cohort (p for interaction = 0.005).</P> <P><B>Conclusions</B></P> <P>Early RAB treatment in patients with heart failure and severe renal insufficiency was related to better prognosis. The benefit of RAB was particularly prominent in patients receiving RR therapy.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Renin-angiotensin blockade (RAB) was associated with favorable prognosis. </LI> <LI> RAB was more effective in patients with renal replacement therapy (RR). </LI> <LI> Patients with RR were taking higher intensity of RAB at 1-year follow-up. </LI> </UL> </P>
First Detection of bla(IMP-1) in Clinical Isolate Multiresistant Acinetobacter baumannii from Korea
( Seok Hoon Jeong ),( Il Kwon Bae ),( Seung Ghyu Sohn ),( Kwang Ok Park ),( Young Jun An ),( Kwang Hoon Sung ),( Seon Ju Jang ),( Myong Jin Heo ),( Ki Suk Yang ),( Sang Hee Lee ) 한국미생물생명공학회 2006 Journal of microbiology and biotechnology Vol.16 No.9
Seok Ho Dong,Jae Yeon Lee,Nam Hoon Kim,Jae Young Jang,Hyo Jong Kim,Byung Ho Kim,Young Woon Chang,Rin Chang 대한소화기기능성질환·운동학회 2011 Gut and Liver Vol.5 No.3
Background/Aims: Percutaneous endoscopic gastrostomy (PEG) has been widely used for patients with swallowing dysfunction. However, its beneficial effects in the treatment of gastroesophageal reflux (GER) are controversial. The aim of this study was to evaluate the effect of PEG on the prevention of GER in patients with nasogastric tube (NGT) feeding. Methods: Continuous 24-hour pH monitoring was performed prospectively in 21 patients receiving NGT feeding before and 7.3±2.2 days after PEG placement to compare the severity of GER. Results: We studied 21 patients with a mean age of 59.8±14.1 years. The mean duration of NGT placement was 5.8±5.4 months. The causes of swallowing dysfunction included cerebral infarction, cerebral hemorrhage and other central nervous system (CNS) lesions. When all of the patients were considered, there were no significant differences in reflux parameters after PEG placement compared to before PEG placement. However, all seven patients who had preexisting GER showed significant improvement (p<0.05) of the reflux parameters, including the frequency of acid reflux, duration of acid reflux, total time with a pH below 4.0 and the fraction of time with a pH below 4.0, after PEG placement. Conclusions: PEG might prevent GER in patients receiving NGT feeding, especially in those patients with GER. (Gut Liver 2011;5:288-292)