• KSBB Journal
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• 제23권5호
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• pp.381-386
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• 2008

본 연구에서는 암모니아에 의해 손상된 사람의 간세포주 Hep G2 cell과 rat의 hepatocyte에 대하여 metronidazole이 간 세포 손상을 억제하는 효과가 있음을 밝혔다. Metronidazole은 암모니아에 의한 세포 생존율 감소, 배지내의 암모니아 수준 및 지질과산화 증가 및 항산화 효소 발현 감소 그리고 세포 내 DNA 손상과 세포사멸을 억제하였다. 따라서 metronidazole은 암모니아로부터 기인하는 세포손상을 감소시켜 간세포 기능을 보호함으로써 간 기능의 저하로 발생한 과암모니아혈증에 효과적인 치료제로서의 가능성을 시사한다.

• 대한한방내과학회지
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• 제23권2호
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• pp.306-312
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• 2002

Systemic Lupus Erythematosus(SLE) is a autoimmune disease characterized by combined symtoms of malar rash, discoid rash, neuropsychiatric disorder, renal disorder, hematologic disorder, photosensitivity immunologic disorder, oral ulcer, anti-nuclear antibody, arthritis, pleuritis and pericarditis, etc. Multiple genetic or environmental causes are supposed to facilitate antiboby production to autoantigen such as ds-DNA, histone, phospholipid, red blood cell, platelet, etc. And defective complementary system fail to remove autoantigen-antibody complex, which deposit in multiple organs and result in inflammatory damages. SLE does not correctly correspond to any specific category of oriental medicine. But, accoring to previous reports, it can be controlled by herb medications used differently patients-to-patients. So we are to report this one SLE case being successfully controlled by classic corticosteroids with herb medications based on oriental diffrential diagnosis of symptoms and signs.

• 한국균학회지
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• 제29권1호
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• pp.9-14
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• 2001

Colletotrichum spp.는 광범위한 기주 범위를 갖는 다범성 균으로 각종 작물에 피해를 야기시키는 중요한 식물병원 진균이다. 최근 국내에서 널리 재배되고 있는 단감, 사과, 복숭아, 포도 등에 탄저병이 발생하여 많은 경제적 손실을 초래하고 있다. 탄저병 병원균의 경우 기존에는 주로 형태적 특성이나 배지상에서의 특성, 기주에 대한 병원성의 차이에 의존하여 분류를 해 왔다. 그러나 최근에는 병원균의 분류에 있어 문제점을 해결하기 위하여 분자생물학적 방법을 이용하고 있다. 최근에는 RAPD(ramdomly amplified polymorphic DNAs)와 RFLP(restriction fragment length polymorphism)의 장점만을 살린 AFLP(amplified fragment length polymorphism)기법이 유연관계 분석에 있어서 각광을 받고 있고 rDNA부위를 증폭하여 제한효소를 이용하여 다양성을 보는 방법이 많이 이용되고 있다. 이에 본 실험에서는 AFLP 기법 이용하여 단감나무에 탄저병을 일으키는 균들간에 유연관계를 밝혔다. AFLP결과에서 variation이 심하여 각각의 특징적인 band를 검출할 수 있었다. 특히 단감나무에 병해를 일으키는 탄저병 병원균 2개의 종이 복합적으로 관여하는 사실을 알 수 있었다.

• 대한한방내과학회지
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• 제31권4호
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• pp.693-705
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• 2010

Objectives : The water extract of Daechilgi-tang(DCGT) has traditionally been used for treatment of qi stagnation(氣滯), which is considered to be one of the important causes of neuronal disease in oriental medicine. However, little is known about the mechanism by which DCGT protects neuronal cells from brain cell damages. Methods and Results : The author tested the mechanism of the cytoprotective effect of DCGT on glutamate -stimulated rat C6 glial cells. DCGT significantly protected C6 glial cells from glutamate in MTT assay. Pre-treatment of C6 glial cells with DCGT markedly inhibited the DNA fragmentation of C6 cells induced by glutamate. Glutamate increased the generation of reactive oxygen species(ROS) and intracellular calcium level in C6 glial cells. However, pre-treatment with DCGT markedly suppressed the increase of ROS generation and intracellular calcium accumulation induced by glutamate. Among apoptosis signaling mediators, DCGT markedly increased the expression level of Bcl2 in glutamate-treated cells. It also inhibited the cleavage of caspase-3 and PARP proteins by glutamate in C6 glial cells. Conclusions : These results suggest that DCGT protects brain cells from glutamate cytotoxicity through inhibition of ROS generation and activation of apoptosis signaling pathway as well as induction of the anti-oxidant system.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.64-64
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• 2018

The genus Cenchrus (Poaceae), containing ca. 97 species, is distributed throughout Australia, Africa and Indian sub-continent and which was introduced to the United States and Mexico for use in improved pasture. In Korea, especially Daecheong Island, it is one of the most hazardous invasive plant, which causes serious environmental threats, biodiversity damages and physically negative impact on humans and animals. It can cause serious damage to farms, fields and white sand beaches. However, the chloroplast (cp) genome sequences and information of Cenchrus longispinus have been not addressed, so we provide the complete cp genome of Cenchrus longispinus using next-generation sequencing technology. The size of cp genomes of this Daecheong Island species (Cenchrus longispinus) is 137,144 bp, and it shows a typical quadripartite structure. Consisting of the large single copy (LSC; 80,223 bp), small single copy (SSC; 12,449 bp), separated by a pair of inverted repeats (IRs; 22,236 bp). This cp genome contains 75 unique genes, 4 rRNA coding genes, 33 tRNA coding genes and 21 duplicated in the IR regions, with the gene content and organization are similar to other Poaceae cp genomes. Our comparative analysis identified four cpDNA regions (rpl16, rbcL, ndhH and ndhF) from three Cenchrus species, two Setaria species and one Pennisetum species which may be useful for molecular identification.

• 대한한방내과학회지
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• 제31권1호
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• pp.66-78
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• 2010

Objective : This study was designed to investigate the possibility of AR for chronic renal injury. Methods : The author first investigated the expression levels of DNA by inducing of chronic renal injury. Then, the author investigated the effects of AR on chronic renal injury induced by combination treatment with Adriamycin and cisplatin in terms of changes in body weights and renal tissues, urine volume, BUN and creatinine levels, creatinine clearance and histopathological changes in renal tissues. Total expression levels of 546 genes were elevated or lowered by induction of chronic renal injury. Genes of which whose expression levels were elevated by induction of chronic renal injury were related to the PPAR signaling pathway and fatty acid mechanism, etc. Genes of which expression levels were lowered by induction of chronic renal injury were related to the neuroactive ligand-receptor signaling pathway. Results : Oral administration of AR restored renal mass which was reduced by induction of chronic renal injury. AR also restored creatinine clearance and lowered serum BUN level. In histopathological observation, the AR group has a tendency to prevent tissue damages as shown in the chronic renal injury group. Conclusions : AR can be used to treat patients with chronic renal injury although further study will be needed to elucidate the exact mechanisms in the efficacy of AR on chronic renal injury.

• Biomolecules & Therapeutics
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• 제26권2호
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• pp.218-223
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• 2018

The liver is an essential organ for the detoxification of exogenous xenobiotics, drugs and toxic substances. The incidence rate of non-alcoholic liver injury increases due to dietary habit change and drug use increase. Our previous study demonstrated that Ecklonia stolonifera (ES) formulation has hepatoprotective effect against alcohol-induced liver injury in rat and tacrine-induced hepatotoxicity in HepG2 cells. This present study was designated to elucidate hepatoprotective effects of ES formulation against carbon tetrachloride ($CCl_4$)-induced liver injury in Sprague Dawley rat. Sixty rats were randomly divided into six groups. The rats were treated orally with ES formulation and silymarin (served as positive control, only 100 mg/kg/day) at a dose of 50, 100, or 200 mg/kg/day for 21 days. Seven days after treatment, liver injury was induced by intraperitoneal injection of $CCl_4$ (1.5 ml/kg, twice a week for 14 days). The administration of $CCl_4$ exhibited significant elevation of hepatic enzymes (like AST and ALT), and decrease of antioxidant related enzymes (superoxide dismutase, glutathione peroxidase and catalase) and glutathione. Then, it leaded to DNA damages (8-oxo-2'-deoxyguanosine) and lipid peroxidation (malondialdehyde). Administration of ES formulation inhibited imbalance of above factors compared to $CCl_4$ induced rat in a dose dependent manner. Real time PCR analysis indicates that CYP2E1 was upregulated in $CCl_4$ induced rat. However, increased gene expression was compromised by ES formulation treatment. These findings suggests that ES formulation could protect hepatotoxicity caused by $CCl_4$ via two pathways: elevation of antioxidant enzymes and normalization of CYP2E1 enzyme.

• 한국수정란이식학회지
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• 제33권2호
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• pp.75-84
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• 2018

The cryopreservation has been extensively applied in many cells including spermatozoa (semen) during past several decades. Especially, the canine spermatozoa cryopreservation has contributed on generation of progeny of rare/genetically valuable dog breeds, genome resource banking and transportation of male germplasm at a distant place. However, severe and irreversible damages to the spermatozoa during cryopreservation procedures such as the thermal shock (cold shock), formation of intracellular ice crystals, osmotic shock, stress of cryoprotectants and generator of reactive oxygen species (ROS) have been addressed. According as a number of researches have been conducted to overcome these problems and to advance cryopreservation technique, several analytical methods have been employed to evaluate the quality of the fresh or cryopreserved canine spermatozoa in regards to the motility, morphology, integrity of membrane and DNA, mitochondrial activity, ROS generation, binding affinity to oocytes, in vitro fertilization potential and fertility potential by artificial insemination. Because the study designs with certain application of analytical methods are selective and varied depending on each experimental objective and laboratory condition, it is necessary to establish the normal reference data of the fresh or cryopreserved canine spermatozoa for each analytical method to monitor experimental procedure, to translate raw data and to discuss results. Here, we reviewed the recent articles to introduce various analytical methods for the canine spermatozoa as well as to establish the normal reference data for each analytical method in the fresh or cryopreserved canine spermatozoa, based on the results of the previous articles. We hope that this review contributes to the advancement of cryobiology in canine spermatozoa.

• BMB Reports
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• 제52권12호
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• pp.695-699
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• 2019

Cytokine-induced apoptosis inhibitor 1 (CIAPIN1), known as an anti-apoptotic and signal-transduction protein, plays a pivotal role in a variety of biological processes. However, the role of CIAPIN1 in inflammation is unclear. We investigated the protective effects of CIAPIN1 in lipopolysaccharide (LPS)-exposed Raw 264.7 cells and against inflammatory damage induced by 12-O-tetradecanoylphorbol-13-acetate (TPA) in a mouse model using cell-permeable Tat-CIAPIN1. Transduced Tat-CIAPIN1 significantly reduced ROS production and DNA fragmentation in LPS-exposed Raw 264.7 cells. Also, Tat-CIAPIN1 inhibited MAPKs and NF-κB activation, reduced the expression of Bax, and cleaved caspase-3, COX-2, iNOS, IL-6, and TNF-α in LPS-exposed cells. In a TPA-induced animal model, transduced Tat-CIAPIN1 drastically decreased inflammation damage and inhibited COX-2, iNOS, IL-6, and TNF-α expression. Therefore, these findings suggest that Tat-CIAPIN1 might lead to a new strategy for the treatment of inflammatory skin disorders.

• 동의생리병리학회지
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• 제20권6호
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• pp.1459-1466
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• 2006

The water extract of Hwansodan has been traditionally used for treatment of ischemic brain damage in oriental medicine. However, little is known about the mechanism by which the water extract of Hwansodan rescues cells from neurodegenerative disease. PC12 pheochromocytoma cells have been used extensively as a model for studying the cellular and molecular mechanisms of neuronal cell damages. Under deprivation of growth factor and ischemic injury, PC12 cells spontaneously undergoes apoptotic cell death. Serum and glucose deprivation markedly decreased the viability of PC12 cells, which was characterized with apparent apoptotic features such as membrane blebbing as well as fragmentation of genomic DNA and nuclei. However, the aqueous extract of Hwansodan significantly reduced serum and glucose deprivation-induced cell death and apoptotic characteristics through reduction of intracellular peroxide generation. Pretreatment of Hwansodan also ingibited the activation of caspase-3, in turn, degradation of ICAD/DFF45 was completely abolished in serum and glucose deprivated cells. Furthermore, pretreatment of Hwansodan obviously increased heme oxygenase 1 (HO-1) expression in PC12 cells. Taken together, the data suggest that the protective effects of Hwansodan against serum and glucose deprivation induced oxidative injuries may be achieved through the scavenging of reactive oxygene species accompanying with HO-1 induction.