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유삼환(Sam hwan Yu),김정숙(Jeong Sook Kim),신명자(Myung Ja Shin),이종은(Jong Eun Lee),서을원(Eul Won Seo) 한국생명과학회 2009 생명과학회지 Vol.19 No.10
본 연구는 탁수가 어류에 미치는 영향을 분석하기 위하여 임하호 유입지천인 탁수수계(영양군 화매천)와 비탁수수계(청송군 신흥천)의 수질, 토양성분 및 어류의 조직ㆍ생리적 변화를 조사하였다. 임하호 유입지천의 수질은 탁수수계에서 pH, DO, SS 및 탁도가 높았으며, 토양성분은 vermiculite (Ⅴ), illite (Ⅰ)와 같은 점토광물이 높은 것으로 보아 점토광물이 강우시 쉽게 유출되어 탁수에 영향을 줄 것으로 생각된다. 탁수수계에 서식하는 어류는 이차새변의 간격이 일정하지 않고, 상피세포의 분리와 부종 및 곤봉 형태가 관찰되었다. 또한 아가미 표면이 매끄럽지 못하며 다량의 이물질이 존재하였고, 신장 조직에서는 보우먼주머니 안의 사구체 크기가 수축되어 보우만 공간이 넓은 형태를 나타냈다. 이러한 조직학적 변화가 장기간 지속될 경우 어류의 2차 병변의 원인이 될 수 있으며, 더 나아가 어류의 건강상에 영향을 줄 것으로 사료된다. 항산화효소의 활성은 탁수수계에서 높은 활성을 보이며, GR은 항산화효소의 활성중 가장 낮은 활성을 나타냈다. 또한 탁수수계의 근육과 신장조직에서는 SOD, CAT, GPX, GST가 비탁수수계 보다 높은 활성을 보였다. 이는 활성산소가 많이 발생하는 탁수수계의 어류 체내에서는 유해한 라디칼을 제거하기 위해 항산화효소의 활성이 증가한 것으로 생각된다. The present study aims to examine the effect of turbid water on fishes in streams which branch into a turbid water area (Yeongyang-gun) and a non-turbid water area (Cheongsong-gun), and finally flow into the Imha reservoir. In a comparison of water quality, the chemical status of the water showed higher pH, DO and SS in the turbid water area than in the non-turbid water area. Also, high density of clay minerals such as vermiculite (Ⅴ) and illite (Ⅰ), which is from clay mineral leakage during rainfall, was detected in turbid water, resulting in an increase of turbidity. Fishes inhabiting the turbid water showed irregular spaces in gill lamella, cell separation, edema, and clubbing in epithelial tissues. Also, the gill surface showed roughness and plenty of muddy debris substances inside the gills. The Bowman's space was expanded because of contraction of the glomerulus in the Bowman's space of the kidney tissues. Antioxidant enzymes such as SOD, CAT, GPX, and GST showed higher activities in the specific tissues, muscles and kidney, of fishes living in turbid water than in the non-turbid area. We suggested that; first, the antioxidant activities were increased due to removal of harmful radicals generated in fish bodies in the turbid water area, second, long-time exposure of these histological changes in the tissues might have induced secondary lesion accompanying the inaccurate physiological constancy of fishes.
(Hwan Young Lee),(Yu Sam Kim) 생화학분자생물학회 2001 BMB Reports Vol.34 No.4
MatR in Rhizobium trifolii is a malonate-responsive transcription factor that regulates the expression of genes, matABC, enabling decarboxylation of malonyl-CoA into acetyl-CoA, synthesis of malonyl-CoA from malonate and CoA, and malonate transport. According to an analysis of the amino acid sequence homology, MatR belongs to the GntR family The proteins of this family have two-domain folds, the N-terminal helix-turn-helix DNA-binding domain and the C-terminal ligand-binding domain. In order to End the malonate binding site and amino acid residues that interact with RNA polymerase, a sitedirected mutagenesis was performed. Analysis of the mutant MatR suggests that Arg-160 might be involved in malonate binding, whereas Arg-102 and Arg-174 are critical for the repression activity by interacting with RNA polymerase.
Effects of the Constituents of Paeonia Lactiflora Root on Arachidonate and NO Metabolism
( Yong Hwan Choi ),( Lian Yu Gu ),( Yeong Shik Kim ),( Sam Sik Kang ),( Ju Sun Kim ),( Mim Hye Yean ),( Hyun Pyo Kim ) 한국응용약물학회 2006 Biomolecules & Therapeutics(구 응용약물학회지) Vol.14 No.4
In order to establish the anti-inflammatory cellular mechanism of the paeony root (Paeonia lactiflora, Pall, Paeoniaceae), the constituents including paeoniflorin, albiflorin, (+)-catechin, paeonol, benzoic acid and methyl gallate were evaluated for their effects on arachidonate and NO metabolism. Among the compounds tested, only paeonol weakly inhibited cyclooxygenase-2-mediated PGE2 production from LPS-treated RAW 264.7 cells. (+)-Catechin and methyl gallate weakly inhibited inducible nitric oxide synthase-mediated NO production from the same cell line. In particular, methyl gallate significantly inhibited 5-lipoxygenase from RBL-1 cells with an IC50 of 8.4 μM. These results suggest that the inhibition of these components on arachidonate and NO metabolism may contribute at least in part to anti-inflammatory mechanism of the paeony root.
Risk factors for pneumocystis jirovecii pneumonia (PCP) in kidney transplantation recipients
( Su Hwan Lee ),( Dong Jin Joo ),( Myoung Soo Kim ),( Yu Seun Kim ),( Moo Suk Park ),( Young Sam Kim ),( Se Kyu Kim ),( Joon Chang ),( Song Yee Kim ) 대한결핵 및 호흡기학회 2015 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.120 No.-
Introduction: Pneumocystis jirovecii pneumonia (PCP) is a potentially life threatening infection that occurs in immunocompromised patients. The aim of this study was to evaluate the risk factors for PCP pneumonia in kidney transplantation recipients. Methods: We conducted retrospective analysis of 500 consecutive kidney transplantation recipients performed at Severance hospital between April 2011 and April 2014. Diagnosis of PCP was defined with a positive PCP polymerase chain reaction assay, infiltration of chest imaging and using of anti-PCP drugs. Results: Eighteen PCP pneumonia patients who received kidney transplantation (3.6%) were diagnosed as PCP pneumonia. The median time from transplantation to infection of PCP was 18 months (range 0.3-36). No differences were observed between two groups in sex, age, body mass index (BMI), and type of donor, smoking history, past history of tuberculosis, history of diabetes mellitus (DM) and development of post transplantation DM. Recipients who were experienced acute rejection (odds ratio [OR] 11.24, 95% confidence interval [CI] 3-42, P < 0.001) or previous CMV reactivation in need of treatment (OR 5.78, 95% CI 1.9-17.3, P = 0.002) more developed PCP pneumonia. The average time from acute rejection to PCP pneumonia infection was 278 days (range 37-858) and from CMV reactivation to PCP pneumonia infection was 114 days (range 0-480). Conclusions: Acute rejection and CMV reactivation seemed to be risk factors. Kidney transplantation recipients experienced acute rejection or CMV reactivation can be considered for prophylaxis of PCP.