• Title/Summary/Keyword: CCl$^4$

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Phellinus linteus Extract Regulates Macrophage Polarization in Human THP-1 Cells (상황버섯 추출물의 인간 유래 THP-1 단핵구 세포주의 분극화 조절)

  • Lee, Sang-Yull;Park, Sul-Gi;Yu, Sun-Nyoung;Kim, Ji-Won;Hwang, You-Lim;Kim, Dong-Seob;Ahn, Soon-Cheol
    • Journal of Life Science
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    • v.30 no.2
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    • pp.113-121
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    • 2020
  • Macrophages are initiators for regulating a host's defenses to eliminate pathogens and trigger tissue repair. Macrophages are classified into two types: classically (M1) activated macrophages and alternatively (M2) activated macrophages. M1-phenotype macrophages directly or indirectly kill infectious organisms and tumor cells via pro-inflammatory responses, whereas M2-phenotype macrophages remodel wounded tissue through anti-inflammatory responses. In this paper, we investigated how Phellinus linteus hot water extract passed from Diaion HP-20 resin (PLEP) regulates polarization of M1-like or M2-like macrophages in human THP-1 cells. PLEP did not have cytotoxicity at a high concentration of 300 ㎍/ml. We observed morphological alteration of the THP-1 cells, which are stimulated by PLEP, LPS/INF-γ (M1 stimulators) or IL-4/IL13 (M2 stimulators). PLEP exposure induced morphology contiguous with LPS/INF-γ. qPCR was also performed to determine whether PLEP influences M1 or M2 polarization-related genes. M1-phenotype macrophage-specific genes, such as TNF-α, IL-1β, IL-6, IL-8, CXCL10 and CCR7, were enhanced by PLEP in a dose-dependent manner similar to LPS/INF-γ. Conversely, M2-phenotype-specific genes, such as MRC-1, DC-SIGN, CCL17 and CCL22, were suppressed by PLEP. PLEP also significantly up-regulated secretory inflammation cytokines related to M1 polarization of macrophages, including TNFα, IL-1β and IL-6, which was similar to the gene expression. Further, MAPK and NF-κB signaling were increased by treatment with PLEP, resulting in enhancement of cytokine secretion. PLEP might therefore be used as a promising booster of pro-inflammatory responses through M1 polarization of human THP-1 cells.

Stability on Chemical Treatment of Niosquitocidal delta-endotoxin from Bacillus thuringiensis subsp. darmstadiensis 73E10-2 (모기유충에 살충력이 있는 Bacillus thuringiensis subsp. darmstadiensis 73E10-2의 delta-endotoxin의 화학적 처치에 따른 안정성)

  • 김광현;조경순;이광배
    • Microbiology and Biotechnology Letters
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    • v.19 no.3
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    • pp.308-312
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    • 1991
  • The delta-endotoxin from B. thuringiensis subsp. damstadienszs 73E10-2 was resistant to high concentration of salt (4M NaBr), organic solvents (50% acetone), denaturants (4 M urea), and neutral detergents (10% triton X-100). In contrast, the toxin was inactivated by treating with charged detergents as well as guanidine hydrochloride or carbon tetra-chloride. The delta-endotoxin is not a sulfhydryl activated toxin, but modification of the lysine side chains eliminated toxicity against mosquito larvae.

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Chemoprotective Effect of Methanol Extract of Hedera rhombea Loaves on the Reversal of Cytochrome P-450 Activities Induced by Carbon Tetrachloride (사염화탄소로 유도된 Cytochrome P-450 활성도의 전환으로 본 Hedera rhombea 잎의 메탄올 추출물의 간독성 감소작용)

  • 홍영숙;김형래;배영숙;박상신
    • Biomolecules & Therapeutics
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    • v.3 no.4
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    • pp.245-250
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    • 1995
  • The carbon tetrachloride($CCl_4$) has been demonstrated to have a hepatotoxic effect in human or many other species. To investigate the enzyme induction of mixed function oxygenases in liver of male Sprague-Dawley rats a single 0.1, 0.5 mι/kg dose of carbon tetrachloride were given. At 24 hr after a single dose of 0.1 mι CC1$_4$/kg weight, methanol extract of Hedera rhombea leaves was administered with 100, 500 mg/kg weight. Assays of 7-ethoxyresorufin-Ο-deethylation(EROD),7-benzyloxyresorufin-Ο-deathylation(BROD),4-nitro-phenol-UDP-glucuronosyltransferase(UDPGT), Western blot and RNA slot blot were used as representatives of the activities of cytochrome P-450 enzymes. The change of the activity of CYP1A1 form measured by EROD assay and Western analysis using 1-7-1 monoclonal antibody was not observed. The activity CYP2B1 form by BROD assay and using 2-66-3 monoclonal antibody was remarkably increased. Elevated level of CYP2B1 mRNA was shown by slot hybridization with 2B1-specific probe. Administration of methanol extract of Hedera rhombea leaves reversed the enzyme activity and the level of mRNA, which suggest the chemoprotective effect of methanol extracts of Hedera rhombea leaves to carbon tetrachloride hepatotoxlcity.

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Failure Probability Evaluation of Pressure Tube using the Probabilistic Fracture Mechanics (확률론적 파괴역학 기법을 이용한 압력관의 파손확률 평가)

  • Son, Jong-Dong;Oh, Dong-Joon
    • Journal of the Korean Society of Safety
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    • v.22 no.4
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    • pp.7-12
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    • 2007
  • In order to evaluate the integrity of Zr-2.5Nb pressure tubes, probabilistic fracture mechanics(PFM) approach was employed. Failure assessment diagram(FAD), plastic collapses, and critical crack lengths(CCL) were used for evaluating the failure probability as failure criteria. The Kr-FAD as failure assessment diagram was used because fracture of pressure tubes occurred in brittle manner due to hydrogen embrittlement of material by deuterium fluence. The probabilistic integrity evaluation observed AECL procedures and used fracture toughness parameters of EPRI and recently announced theory. In conclusion, the probabilistic approach using the Kr-FAD made it possible to determine major failure criterion in the pressure tube integrity evaluation.

The Effect of Cichorium intybus Extract on Hepatotoxicity in Rats

  • Park Ji-Young;Kim Eun-Kyung
    • Journal of Environmental Health Sciences
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    • v.32 no.3
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    • pp.235-239
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    • 2006
  • Cichorium intybus (Compositae) has been used for fevers, dyspepsia, headache and jaundice, as a demulcent. Also, it has relaxation effects and relief effects against coffee and teas, and is widely used as food. We investigated anti-lipid peroxidative effects and liver protective activity on $CCl_4$ induced lipid peroxidation and hepatotoxicity in rats. MeOH Ex. enhanced the inhibition of anti-lipid peroxidative effects in liver lipid. In chemical parameters obtained from serum analysis, MeOH Ex. revealed significant decrease on hepatotoxicity. The results were as follows; 1. The inhibitory effects of lipid peroxidation were shown in accordance with the increase of samples' concentration level. 2. In chemical parameters obtained from serum analysis, the activities of GOT, GPT, AlP were restored to near the normal level. The contents of cholesterol and BUN showed inhibitory effects with valence. 3. The weights of liver and spleen were not able to restore to the normal level. But on a general level, they were reduced more than the control group.

A Study on the Chrome of Clothing Leathers (의류용 피혁의 크롬에 관한 연구)

  • Cho, Seung-Shick;Sim, Mi-Sook;Kim, Un-Bae
    • Textile Coloration and Finishing
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    • v.4 no.1
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    • pp.16-20
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    • 1992
  • This study was to examine the dry cleaning resistance of chrome bonding in the chrome-tanned garment leathers, and to analyze their chrome content. The results are as follows: 1. The average percentage of the chrome content (as $Cr_2O_3$) in the chrome-tanned garment leathers was 2.7%. 2. By the dry cleaning treatment and its numbers, the values of chrome content were little affected. 3. The resistance against dry cleaning with perchloroethylene $(Cl_2C = CCl_2)$ of samples was confirmed.

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${\beta}-Glucuronidase-inhibitory\;Activity$ and Hepatoprotective Effect of Herbal Medicines (생약의 ${\beta}-Glucuronidase$ 저해와 간장보호효과)

  • Shim, Sang-Bum;Park, Ju-Suk;Kim, Nam-Jae;Kim, Dong-Hyun
    • Korean Journal of Pharmacognosy
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    • v.30 no.2
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    • pp.111-114
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    • 1999
  • Inhibitory effect of water and ethyl acetate extract of 60 kinds of herbal medicines was investigated on ${\beta}-glucuronidase$. Among water extract of them, Galla Rhois had the most potent ${\beta}-glucuronidase-inhibitory\;activity$. Termaliae Fructus, Amomi Tsa-ko Fructus and Arecae Semen were also potent inhibitors. Among ethyl acetate extract of them, Galla Rhois had the most potent ${\beta}-glucuronidase-inhibitory\;activity$. Nelumbinis Semen. Ephedrae Radix and Termaliae Fructus were also potent inhibitors. The extract of Galla Rhois had potent hepatoprotective effect on $CCl_4-induced$ hepatotoxicity of rats. These results suggest that the ${\beta}-glucuronidase$ seems to be closely related to the liver injury, which could be prevented by the inhibitor of ${\beta}-glucuronidase$.

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Pharmacological Effects of Lycium chinensis (구기자나무의 약물활성)

  • Kim, Nam-Jae;Youn, Whang-Geum;Hong, Nam-Doo
    • Korean Journal of Pharmacognosy
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    • v.25 no.3
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    • pp.264-271
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    • 1994
  • Pharmacological effects of water extracts of Lycii Fructus, Lycii Folium and Lycii Cortex Radicis from Lycium chinensis were investigated. Lycii Folium significantly protected the hepatic function from damages orally caused by $CCl_4 $administration in mice and had a strong hypoglycemic effect in hyperglycemic mice induced by streptozotocin. Lycii Fructus decreased the blood pressure rise associated with the growth of normal rats. Lycii Cortex Radicis had a strong hypoglycemic effect in hyrerglycemic mice induced by streptozotocin. Also, hypolipidemic effects in hyperlipidemic rats induced by 1% cholesterol fed-diet and 75% fructose were significantly observed by oral administration of water extracts of Lycii Fructus, Lycii Folium and Lycii Cortex Radicis.

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A Study on the Thermal Decomposition of Carbon Tetrachloride by Pyrolytic Incineration (사염화탄소의 열분해 소각에 관한 연구)

  • 이태호;정홍기
    • Journal of environmental and Sanitary engineering
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    • v.11 no.1
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    • pp.57-61
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    • 1996
  • This study was to decompose carbon tetrachloride and CFC with pyrolytic incineration unit because of prohibition of their usage sooner or later. We have investigated heating value and temperature versus decomposing rate, removal of $Cl_2$ and dust in the flue gas, The results obtained were as follows; 1. In combustion condition to decompose $CCl_4$ heating value was 3,300Kcal/Kg, retention time was 2,0 sec. incinerator exit temperature was $950^{\circ}C$. 2.The removal of HCI and $Cl_2$ in flue gas used NaOH as reagent, then molar ratio o of $Na^+/Cl^-$ was 1.07. 3. NaCI of dust component was more than 90 %, 2 stage venturi scrubber was used to remove dust, then removal rate of dust was 99% over at L/G of $1.7Vm^3$

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Role of Phospholipase $A_2$ on lipid peroxidation (과산화지질 형성에 있어서 Phospholipase $A_2$의 역할)

  • 황화신;정규찬;장현옥
    • Proceedings of the Korean Society of Applied Pharmacology
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    • 1994.04a
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    • pp.341-341
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    • 1994
  • 생체막의 주요 구성성분인 인지질의 2번 위치에 결합한 불포화지방산은 각종 전이금속이나 각종 활성산소들의 공격을 쉽게 받아 지질과산화반응이 일어나서 생체에 유독한 화합물을 생성하게 된다. 생체는 이러한 기구의 해독을 위하여 크게 2가지 방어기전을 갖고 있다. 즉 Vitamin- C, $\alpha$-tocopherol, flavonoid, SOD, catalase 등과 같이 생성된 활성산소를 제거시키는 기구와. 활성산소에 의해 생성된 과산화물을 제거시키는 기구로 glutathione peroxidase (GPX)가 알려졌으며 GPX에 의해 독성이 낮은 수산화물까지 환원시키는 기구가 보고되었다. 그러나 인지질의 과산화물 그대로는 GPX의 기질이 쥘수 없으므로, 산화된 지방산을 절단하는 효소에 대한 기구의 해석이 요구되고 있다. 최근 여러질병에 관련되어 있는 인지질 2번위치의 지방산을 분해하는 phospholipase $A_2$ (PLA$_2$)가 과산화지질의 분해에 관여한다는 주장이 제기되었다. 따라서 본 연구에서는 rat liver microsome에 $CCl_4$투여로 일어나는 과산화반응에 있어서 PLA$_2$의 역할을 규명하기 위하여 본 실험을 행하였다.

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