• 대한예방한의학회지
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• 제2권1호
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• pp.165-173
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• 1998

In order to investigate the effect of the Herba Segesbeckiae on the thrombosis induced by endotoxin in rats. The rats were treated with solid extract of Herba Siegesbeckiae 41.9mg /200g(Sample) which were administered orally. And the thrombosis was induced by injecting endotoxin in the caudal vein rats. And then the number of platelets, concentration of fibrinogen, prothrombin time and FDP(fibrinogen degradation product) were measured. The results were as follows; 1. Platelet was increased significantly in sample group compared with control group. 2. Prothrombin time was shortened significantly in sample group compared with control group. 3. Fibrinogen was increased significantly in sample group compared with control group. 4. FDP was decreased significantly in sample group compared with control group. According to the above results, Herba Siegesbeckiae had significant effects on number of Platelets, Prothrombin time, Fibrinogen and FDP. therefore, it is considered that Herba Siegesbeckiae can be applied to diseases related to thrombosis.

• 한국잠사곤충학회지
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• 제37권1호
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• pp.68-73
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• 1995

미국흰불나방(Hyphantria cunea)의 유충에서 중장, 지방체, 말피기씨관에 Bacillus thuringiensis(Bt) var. kurstaki의 내독소 단백질의 독성효과로 인한 생리적 변화를 autoradiography와 Western blot으로 확인하였다. 단백질 합성과 번역연장민자-2에 미치는 영향을 조사한 결과, 앞의 모든 조직에서 단백질 합성이 급격히 저하되었으며, 번역연자인자-2의 활성도 병행하여 저하되었다.

• 한국환경보건학회:학술대회논문집
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• 한국환경보건학회 2003년도 Challenges and Achievements in Environmental Health
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• pp.132-135
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• 2003

Endotoxin concentrations were measured from 69 point-of-use(POU) water treatment system(WTS) by using Limulus amebocyte lysate(LAL) assay, and the results were compared to heterotrophic bacterial data. Endotoxin concentrations in all POU WTS water samples and tap waters varied within the range 0.8-79.1EU mL$\^$-1/ and 0.1-3.4EU mL$\^$-1/, respectively, The correlations between endotoxin concentration and HPC bacteria from the water samples showed not significant(r=0.18).

• 한국미생물·생명공학회지
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• 제21권5호
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• pp.393-398
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• 1993

One strain of mosquitocidal Bacillus thuringiensis, H9B, was isolated from soil. The biochemical characteristics and flagella antigenicity of the strain H9B is similar to that of B. thuringiensis subsp. darmstadiensis. The delta-endotoxin of the strain H9B coincided with that of B. thuringiensis subsp. darmstadiensis strain 73E10-2 on agarose double immunodiffusion test. The delta-endotoxin of B. thuringiensis subsp. israelensis contains hemolysin fragment (28 kb) on SDS-PAGE when the delta-endotoxin was solubilized in alkali, while that of the strain H9B does not contain 28 kb protein.

• 한국미생물·생명공학회지
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• 제14권3호
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• pp.259-264
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• 1986

The compositions of the four madia and their pHs for delta endotoxin production by B. thuringiensis serovar kurstaki 3a3b were examined. In the M-4 media out of the 4 media at pH8, the production of the endotoxin and spore formation were maximal. The mean generation times of the bacterium were 53.4 minutes in the M-1 media, 98 in the M-2, 132 in the M-3, and 127.5 in the M-4. The proper pHs of the media for the endotoxin production appeared to be pH 7 to 8. In the M-4 media, the lag time lasted about 5 hours.

• Biomolecules & Therapeutics
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• 제9권4호
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• pp.258-262
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• 2001

In the advanced age, cardiovascular disease is more serious than any other disease. Especially, the thrombus causes the serious disease like apoplexia, carebri and myocardial infarction. Thrombosis is caused by the injury of endothelium and the alterations in normal blood flow. To investigate activities of Carthamus tinctorius L. Semen butanol fraction for blood coagulation system, endotoxin (4000EU/kg) was injected (i..v) to rats at 1hr after administration of Carthamus tinctorius L. Semen butanole fraction (500 mg/kg, p.o.). Carthamus tinctorius L. Semen butanol fraction was found to have antiplatelet activity in vitro. In vivo it showed a delay of blood clotting time, and prothrombin time, and reduction of fibrinogen and FDP It also increased SOD activity, and decreased MDA content. These results suggest that the antithrombosis effect of Carthamus tinctorius L. Semen butanol frac tion results from suppressive activity for a blood coagulation system and antioxidative activity.

• Biomolecules & Therapeutics
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• 제8권3호
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• pp.223-227
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• 2000

Propolis, a natural resinous compound collected from honey bees, contains many biochemical constituents and has been used for traditional medicines as early as 300 B .C. Recently, it has been reported to possess many biological activities such as antibacterial, antiviral, fungicidal, local anaesthetic, immunostimulating, antiinflammatory and free radical scavenging properties. To investigate activities of chrysin, one of propolis effective compounds for blood coagulation system was injected endotoxin (4000 EU/kg, i.v.) in rats at 1 hr after administered chrysin (20 mg/kg, p.o.). This study was resulted that chrysin has antiplatelet aggregation activity in vitro, delay of blood clotting time and prothrombin time, and reduction of fibrinogen and FDP in vivo. Chrysin has increased SOD activity, GSH content and GST activity, and decreased MDA content in liver. The result suggests that the antithrombosis effect of chrysin is suppressive activity for a blood coagulation system and antioxidative activity.

• The Korean Journal of Physiology and Pharmacology
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• 제3권6호
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• pp.623-630
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• 1999

Decreased cardiac contractility occurs in endotoxicosis, but little is known about the ionic mechanism responsible for myocardial dysfunction. In this study, we examined the changes in $Ca{2+}$ and $K^+$ currents in cardiac myocytes from endotoxin-treated rat. Ventricular myocytes were isolated from normal and endotoxemic rats (ex vivo), that were treated for 10 hours with Salmonella enteritidis lipopolysaccharides (LPS; 1.5 mg/kg) intravenously. Normal cardiac myocytes were also incubated for 6 hours with 200 ng/ml LPS (in vitro). L-type $Ca{2+}$ current $(I_{Ca,L})$ and transient outward $K^+$ current $(I_{to})$ were measured using whole cell patch clamp techniques. Peak $I_{Ca,L}$ was reduced in endotoxemic myocytes (ex vivo; 6.00.4 pA/pF, P＜0.01) compared to normal myocytes (control; 10.90.6 pA/pF). Exposure to endotoxin in vitro also attenuated $I_{Ca,L}$ (8.40.4 pA/pF, P＜0.01). The amplitude of $(I_{to})$ on depolarization to 60 mV was reduced in endotoxin treated myocytes (16.51.5 pA/pF, P＜0.01, ex vivo; 20.00.9 pA/pF, P＜0.01 , in vitro) compared to normal myocytes (control; 24.71.0 pA/pF). There was no voltage shift in steady-state inactivation of $I_{Ca,L}$ and $(I_{to})$ between groups. These results suggest that endotoxin reduces $Ca{2+}$ and $K^+$ currents of rat cardiac myocytes, which may lead to cardiac dysfunction.

• 한국산업보건학회지
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• 제31권4호
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• pp.331-341
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• 2021

Objectives: The aim of this study was to evaluate the concentrations and relationships of coarse particles with a diameter of 10 ㎛ (PM₁₀) with endotoxins according to the time of measurement in windowless poultry houses. Methods: In this study, measurement was performed on ten windowless poultry houses with a vertically integrated system from July to November. PM₁₀ was measured using personal environmental monitors and polytetrafluoroethylene (PTFE) filters with a 4 L/min-calibrated pump in selected sampling locations (two near the door and two near an exhaust fan). The endotoxin on PTFE filter was analyzed by the LAL turbidimetric method. Results: The range of geometric mean concentrations of PM₁₀ and endotoxins for each of the 38 samples were 0.12-3.30 mg/m³ and 11.9-3553.66 EU/m³, respectively. PM₁₀ and endotoxin concentrations varied by farm, increasing with the decrease in ventilation. The range of the coefficient of determination between PM₁₀ and endotoxin was 0.0009-0.9249. As the atmospheric temperature decreased, it was confirmed that the concentrations of PM₁₀ and endotoxin increased because the volume of ventilation was decreased. Conclusions: Endotoxins were more affected by time of measurement and ventilation than PM₁₀, which means that endotoxins could be an important indicator for intervention programs for improvement of indoor environments.

• Tuberculosis and Respiratory Diseases
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• 제40권3호
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• pp.223-235
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• 1993

연구배경 : 대식세포 및 호중구에서 생산되는 superoxide는 외부에서 침입한 병원균을 죽이는 유익한 면이 있는 반면 자체 폐조직에 손상을 주어 폐손상을 일으키기도 한다. 임상에서 중요한 내독소에 의한 성인성호흡장애증후군등의 폐손상시 superoxide 등의 산소유리기가 중요역할을 하는 것으로 알려져 있으며 superoxide의 생산에는 칼슘이 중요한 조절기능을 담당한다. 내독소에 의한 급성폐손상의 경우 실험적으로 verapamil을 투여시 폐부종등의 증상이 완화되는 것이 알려져 있어 칼슘길항제인 verapamil의 산소유리기의 생산에 마치는 영향에 대한 연구가 많이 이루어지고 있다. 그러나 지금까지 폐포대식세포에서 superoxide의 생산에 대한 내독소와 verapamil의 영향을 같이 관찰한 실험은 없었다. 방법 : 본 실험에서는 백서의 폐포대식세포에서 protein kinase C를 직접 자극하는 phorbol myristate acetate 자극에 의한 superoxide의 생산을 측정하고 내독소 및 verapamil이 superoxide의 생산에 미치는 영향을 관찰하고 내독소와 verapamil을 동시에 투여하여 내독소에 의해 대식세포가 활성화되어 superoxide의 생산이 증가하는 priming 효과에 verapamil이 어떠한 영향을 미치는 가를 관찰하였다. 결과 : 폐포대식세포를 PMA로 자극시 기저상태에 비해 3.15배의 superoxide가 생산되었으며 이는 세포외 칼슘의 유무와 전혀 무관하였다. 그리고 내독소 (E. coli 055-B5)로 1시간 전처치후 PMA로 자극시 superoxide의 생산은 0.1 ug/ml 에서 최대로 43% 증가하였다. 또한 verapamil은 대식세포에서 PMA 자극에 의한 superoxide의 생산을 억제하였으며 세포외 칼슘이 없는 상태에서도 억제효과는 나타나 verapamil의 억제효과가 칼슘의 세포내 이동을 차단하는 기전에 의한 것이 아님을 관찰하였다. 내독소에 의한 대식세포에서의 superoxide의 생산의 증가는 verapamil이 없는 경우 30%의 증가에서 verapamil을 같이 투여한 경우 13%의 증가로 유의하게 감소하였다. 이는 내독소에 의한 대식세포의 priming에 칼슘이 영향을 미친다는 간접증거가 된다고 사료된다. 결론 : 이상의 결과로 verapamil은 PMA 자극에 의한 대식세포의 superoxide의 생산을 억제하며 폐포대식세포에 대한 내독소의 priming 효과도 억제하여 이는 내독소에 의한 폐손상시 verapamil의 효과의 한 기전이 되리라 사료된다.