• 대한본초학회지
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• 제20권2호
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• pp.7-16
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• 2005

Objectives : Scrophulariae Radix (SRE) is commonly used in combination with other herbs as a nutrient and health strengthening agent, and to remove 'heat' and replenish vital essence. The water-based extract of this herb can lower blood pressure in both anesthetized and concious animals, and exhibits an anti-inflammatory activity. But, there is lack of studies regarding the effects of SRE on the immunological activities in molecular levels. The present study was conducted to evaluate the effect of SRE on the regulatory mechanism of cytokines and nitric oxide (NO) in Raw 264.7 cells. Method : After the treatment of Scrophulariae Radix methanol extract, cell viability was measured by MTT assay, NO production was monitored by measuring the nitrite content in culture medium. COX-2 and iNOS were determined by Immunoblot analysis, and levels of cytokine were analyzed by sandwich immunoassays. Results : Results provided evidence that SRE inhibited the production of nitrite and nitrate (NO), inducible nitric oxide synthase (iNOS), $interleukin-1{\beta}\;(IL-1{\beta})$ and interleukin-6 (IL-6), and the activation of phospholylation of inhibitor ${\kappa}B{\alpha}\;(p-I{\kappa}B{\alpha})$ in Raw 264.7 cells activated with lipopolysaccharide (LPS). Conclusion : These findings suggest that Scrophulariae Radix can produce anti-inflammatory effect, which may playa role in adjunctive therapy in Gram-negative bacterial infections.

• 한국콘텐츠학회논문지
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• 제12권2호
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• pp.339-348
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• 2012

급성 전골수구성 백혈병(acute promyelocytic leukemia, APL)은 치료제가 한정적이고 그 또한 다양한 부작용을 초래한다. 최근 암세포 형성 억제에 세균 추출물을 사용하는 경우가 증가하는데 이를 이용하여 기존의 약제보다 효과적이면서 부작용이 적은 치료제 개발이 필요하다. 본 연구에서는 L. monocytogenes에서 분비되는 물질(LmSup)과 세균 자체가 함유하고 있는 물질(LmE)을 추출하여 HL-60 세포에 처리한 다음 세포증식 억제 효과를 보고자 하였다. 세포 생존율 및 세포고사를 확인하여 세포를 죽음으로 유도하는 지 파악한 다음 작용기전을 규명하고자 세포주기의 변화 및 ROS 생성을 관찰하였다. 그 결과, LmSup와 LmE가 급성 전골수구성 백혈병(APL) 세포인 HL-60의 세포고사를 유도하고, sub G0/G1기 증가로 세포주기를 비정상적으로 차단함으로써 세포고사를 유도함을 확인하였다. 이때, ROS가 관여함을 관찰하였다. 이를 통해, LmSup 또는 LmE의 구체적인 항암효과 및 기전 분석을 통해 난치병인 APL의 치료 방법 및 치료제 개발에 기여하고자 한다.

• 동의생리병리학회지
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• 제21권3호
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• pp.721-727
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• 2007

Scorpion (SCP) has been clinically used for the treatment of endogenous wind to relieve convulsion, clearing away toxins, resolving hard masses and removing obstruction in the collaterals to relieve pain. Recent studies showed that scorpion toxins that affect the activating mechanism of sodium channels and indian black scorpion venom induced anti-proliferative and apoptogenic activity against human leukemic cell lines U937 and K562. There is lack of studies regarding the effects of SCP on the immunological activities. The present study was conducted to evaluate the effect of SCP on the regulatory effects of cytokines and nitric oxide (NO) for the immunological activities in Raw 264.7 cells. After the treatment of SCP MeOH extract dissolved in media for 1 h prior to the addition of lipopolysaccharide (LPS: 1 ${\mu}$g/ml), cell viability was measured by MTT assay, NO production was monitored by measuring the nitrite content in culture medium. Inducible nitric oxide synthase (iNOS) was determined by immunoblot analysis, and levels of cytokine were analyzed by sandwich immunoassays. As results, SCP inhibited the production of nitrite and nitrate (0.3 and 1.0 mg/ml), iNOS and p-$I_KB_{\alpha}$ protein, tumor necrosis factor-${\alpha}$ (0.3 and 1.0 mg/ml), interleukin-1${\beta}$ (0.3 and 1.0 mg/ml) and interleukin-6 (1.0mg/ml) in Raw 264.7 cells activated with LPS. These findings suggest that SCP can produce anti-inflammatory effect, which may play a role in adjunctive therapy in Gram-negative bacterial infections.

• 농업과학연구
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• 제45권1호
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• pp.19-27
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• 2018

To study the effect of natural anti-microbial chemicals on the growth and quality of chili peppers, chitosan ($100mg/L^{-1}$), stevia ($250mg/L^{-1}$), and the mixture of both chemicals at the same concentration were sprayed after planting at 1-week interval throughout the experimental period. Plant height was measured twice after the $3^{rd}$ and $4^{th}$ applications. Plant height was numerically reduced in all chemical treatments compared to that of untreated control; however, there was no statistical difference between treatments. The fruit quality was examined at commercial maturity, and only minor differences were found in fruit color, length, and dry matter content between the treatments. Although a statistical difference was not present for soluble sugars levels, total phenolics, and capsaicin contents, yield in all chemical treatments significantly increased compared to untreated control. The effect on yield increase was greater at the late harvest season regardless of treatments. Total yield of 4 harvests was higher for the chitosan treatment than other treatments. During the experiment, the entire experimental field was waterlogged for 1 day due to sudden heavy rainfall, which resulted in the occurrence of bacterial browning disease in all treatments. The rate of disease occurrence and the degree of severity, however, were much lower in the chitosan treatment. In conclusion, the potential of chitosan as an alternative antimicrobial agent was confirmed in chili peppers in this study. Further research is required on stevia as an alternative chemical for disease control in chili peppers.

• 대한간호학회지
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• 제41권6호
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• pp.742-749
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• 2011

Purpose: This study was conducted to examine public level of knowledge and attitudes regarding antibiotic use and potential drug resistance. Methods: A cross-sectional face-to-face survey of 1,177 residents aged 18 or over was conducted in Korea. A quota sampling method was used. Results: Most respondents (70%) did not know that antibiotics are ineffective in treating coughs and colds. Two-thirds of the respondents were unaware of the conditions under which antibiotic resistance occurs, despite understanding the concept of resistance. Lower education level and older age were independently associated with inadequate knowledge. Lower education level, older age, inadequate knowledge and no exposure to the education campaign were independently associated with poor attitude. Conclusion: The results of this study demonstrate that the general public has misunderstandings and a lack of knowledge with regard to antibiotic use, despite a national educational campaign. However, the campaign may have had an effect on the public's attitudes towards antibiotics.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계 학술발표회 논문집(II)
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• pp.509-512
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• 2006

We have many environmental problems by the polluted materials as a results of mechanical development these days. So people want to use building products made from natural things and take a good effect for people from those bio products. We can instance electron wave shelding, far infrared ray and anion emission, and anti-bacterial property as the latest trend of the bio building material. So we had a experiment to investigate how much bio materials affect concrete when we use in the concrete with cement substitution. We tested slump, 7days compressive strength, and air contents for physical properties of bio concrete. The result is that bio concretes with four bio ingredients have proper values comparing with target values for slump and air content but lower compressive strength than plain concrete.

• Archives of Pharmacal Research
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• 제28권9호
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• pp.1031-1036
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• 2005

[ $(+)-Lyoniresinol-3{\alpha}-O-\beta-D-glucopyranoside$ ] (1) was isolated from an ethyl acetate extract of the root bark from Lycium chinense Miller, and its structure was determined using 1D and 2D NMR spectroscopy including DEPT, HMQC, and HMBC. $(+)-Lyoniresinol-3{\alpha}-O-\beta-D-glucopyranoside$ exhibited potent antimicrobial activity against antibiotic-resistant bacterial strains, methicillin-resistant Staphylococcus aureus (MRSA) isolated from patients, and human pathogenic fungi without having any hemolytic effect on human erythrocytes. In particular, compound 1 induced the accumulation of intracellular trehalose on C. albicans as stress response to the drug, and disrupted the dimorphic transition that forms pseudo-hyphae caused by the pathogenesis. This indicates that $(+)-Lyoniresinol-3{\alpha}-O-\beta-D-glucopyranoside$ has excellent potential as a lead compound for the development of antibiotic agents.

• 대한본초학회지
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• 제20권2호
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• pp.55-60
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• 2005

Objectives : This study was conducted to investigate the effects Innotus obliquus on the cytokine expression in Raw 264.7 cells. Methods : In Raw 264.7 cells stimulated with lipopolysaccaride(LPS) to Mimic inflammation, Innotus obliquus ethanol extract inhibited nitric oxide production in a dose-dependent manner and abrogated inducible nitric oxide sythase(iNOS) and cyclooxigenase (COX-2). The levels of cytokines were analyzed by sandwich immuno assays. Results and Conclusions : Results provided evidence that Innotus obliquus inhibited the production of IL-b, and IL-6 in Raw 264.7 cells activated with lipopolysaccharide (LPS). These finding suggested that Innotus obliquus can produce anti-inflammatory effect, which may playa role in adjunctive therapy in Gram-negative bacterial infections.

• 한국산학기술학회논문지
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• 제3권3호
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• pp.183-188
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• 2002

Antibacterial glass ceramics composed of $5Li_2O{\cdot}36CaO{\cdot}20TiO_2{\cdot}27P_2O_5$ were Prepared. After ion exchange in the $AgNO_3$solution, crystallization phases were $AgTi_2(PO_4)_3$, $LiTi_2(PO_4)_3$ and $Ca_3(PO_4)_2$. In case of ion exchange, the crystallization phases started to be transformed from $LiTi_2(PO_4)_3$ to $AgTi_2(PO_4)_3$in 0.5 mole $AgNO_3$ solution and the transformation was almost completed in 1.0 mole. ion exchange rate of glass-ceramics powder, considering ion exchange time, was more fast than that of bulk. The bacteriostatic effect of the glass-ceramics on Staphyloroccus aureus and Salmonella typhi bacteria was more excellent than that of glass when the crystallization phase was transformed from LTP to AgTP.

• 미생물학회지
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• 제23권4호
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• pp.271-281
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• 1985

Bacillus thuringiensis var. thuringiensis produces an extracellular insecticidal thermostable .betha.-exotoxin, which was purified through microfiltering, barium precipitation, charcoal absorption chromatography, ion exchange column chromatography and gel filtration. The exotoxin in each purification step was detedted by thin layer chromatography, high pressure liquid chromatography and paper electrophoresis with efficient results. The exotoxin productivity on time course was checked by spectrophotometric absorbance at 258nm with the result that the exotoxin was initially produced in 6 hour culture and reached maximum value in 36 hour culture. Anti-bacterial effect test on Micrococcus flava was applied as toxicity test. The results showed that frowth inhibition of M. flava could be shown in plate assay of cell free filtered supernatant, alkaline eluant from charcoal and purified exotosin obtained from gel filtration column chromatography on Sephadex G-10 appeared to be 740. Heat stability of the exotoxin was confirmed through autoclaving twice.