• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2019년도 춘계학술대회
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• pp.94-94
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• 2019

In this study, we elucidated the anti-inflammatory mechanisms of leaves extracts from Rodgersia podophylla (RPL) in RAW264.7 cells. RP-L significantly inhibited the production of the proinflammatory mediators such as NO, iNOS, IL-$1{\beta}$ and IL-6 in LPS-stimulated RAW264.7 cells. RPL increased HO-1 expression in RAW264.7 cells, and the inhibition of HO-1 by ZnPP reduced the inhibitory effect of RPL against LPS-induced NO production in RAW264.7 cells. Inhibition of p38, ROS and $GSK3{\beta}$ attenuated RPL-mediated HO-1 expression. Inhibition of ROS inhibited p38 phosphorylation and $GSK3{\beta}$ expression induced by RPL. In addition, inhibition of $GSK3{\beta}$ blocked RPL-mediated p38 phosphorylation. RPL induced nuclear accumulation of Nrf2, and Inhibition of p38, ROS and $GSK3{\beta}$ abolished RPL-mediated nuclear accumulation of Nrf2. Furthermore, RPL blocked LPS-induced degradation of $I{\kappa}B-{\alpha}$ and nuclear accumulation of p65. RP-L also attenuated LPS-induced phosphorylation of ERK1/2 and p38. Our results suggest that RPL exerts potential antiinflammatory activity by activating ROS/$GSK3{\beta}$/p38/Nrf2/HO-1 signaling and inhibiting NF-${\kappa}B$ and MAPK signaling in RAW264.7 cells. These findings suggest that RPL may have great potential for the development of anti-inflammatory drug.

• 한국응용과학기술학회지
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• 제35권3호
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• pp.797-806
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• 2018

본 연구는 적작약 꽃 추출물의 활성산소 억제와 항염증 및 MMP-1 발현 억제능 효과에 관해 알아보고 기능성 화장품 소재로써의 가능성을 확인하고자 하였다. 본 실험 방법으로는 세포 내 ROS 측정을 통한 활성산소 억제효과와 세포 독성 평가 및 항염증 측정, HDF 세포에서의 MMP-1의 발현 억제능 효과를 측정하고자 하였다. 실험 결과, RAW 264.7 세포와 HDF 세포 내에서 ROS로 억제효과를 확인하였고, 세포 독성평가는 적작약 꽃 추출물 5, $10{\mu}g/mL$ 처리 농도에서 90% 이상의 세포 생존율, 그 외 처리 농도에서는 80% 이상의 세포 생존율을 확인하였다. 또한 RAW 264.7 세포에서의 NO 생성 억제와 HDF 세포에서 MMP-1의 발현 억제능이 유의하게 억제되는 것을 확인하였다. 이상의 결과를 종합하면, 적작약 꽃 추출물의 세포 내 ROS 생성억제와 NO 생성 억제로 항산화와 항염증 효과, 피부세포에 대한 낮은 독성, MMP-1의 발현 억제를 통한 노화 효과가 확인됨에 따라 기능성 화장품 소재로써의 활용 가능성을 확인할 수 있었다.

• 생명과학회지
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• 제22권6호
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• pp.844-851
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• 2012

섬애약쑥, 인진쑥, 약쑥, 강화사자발쑥 및 개똥쑥 열수 추출물을 제조한 다음 항산화 및 항암활성을 비교 분석하였다. 5종의 쑥 추출물 중 총 페놀 함량은 인진쑥에서 유의적으로 가장 높았으며, 다음으로 섬애약쑥, 개똥쑥, 약쑥 및 강화사자발쑥 순이었다. 플라보노이드 함량도 인진쑥이 가장 높았고, 섬애약쑥은 인진쑥과 유의차가 없었다. 추출물의 농도를 달리하여 항산화능을 측정한 결과, DPPH 라디칼 소거능은 50 ${\mu}g/ml$ 농도에서 섬애약쑥의 활성이 가장 높았고, NO 라디칼 소거능은 200 ${\mu}g/ml$ 농도에서 약쑥, 강화사자발쑥 및 개똥쑥이 약 50% 이상의 활성을 나타내었으며, 이들 시료간에 유의차는 없었다. FRAP법에 의한 항산화능은 섬애약쑥 및 인진쑥에서 높게 나타났으며, ${\beta}$-carotene 존재 하에서의 항산화능 또한 섬애약쑥 및 인진쑥이 100 ${\mu}g/ml$ 농도에서 50% 이상의 높은 활성을 나타내었다. 400 ${\mu}g/ml$ 농도에서 인체 자궁경부 상피암 세포인 HeLa의 증식억제 활성은 인진쑥이 80% 이상으로 활성이 높았고, 유방암 세포인 MCF-7의 대해서는 강화사자발쑥과 섬애약쑥이 80% 이상의 증식억제 활성을 보였다. 이상의 결과, 쑥 추출물은 높은 항산화 활성과 암세포 증식억제 활성을 나타내었으며, 특히 항산화 활성은 ascorbic acid 이상의 높은 활성을 나타내어 천연 기능성 식품 소재로써 활용 가치가 높을 것으로 생각된다.

• Restorative Dentistry and Endodontics
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• 제16권1호
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• pp.190-199
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• 1991

The purpose of this study was to evaluate the antimicrobial effect of root canal cements such as AH-26, Sealapex, Canals and Apatite root sealers(Type I, II, III) and to determine the efficacy of their activities. S.mutans(AHT), S.sanguis(NCTC 9811) and B.gingivalis(381) were streaked on blood agar and the PVC tybes filled with root canal cements were applied on. Then the microorganisms were cultured for 48 hours, anaerobically. B.cereus(KCTC 1012) was streaked on nutrient agar, PVC tubes were applied on and were cultured for 48 hours, aerobically. The inhibition zones of root canal cements were measured with vernier caliper. The data statistically analyzed, and the results were as followed. 1. Apatite root sealers(Type I, II, III) showed no inhibition zones. 2. AH-26, Sealapex and Canals had inhibition zones with varying degrees. The inhibition zone of AH-26 was greatest and followed by Canals and Sealapex(P<0.01). 3. As time goes by after mixing the root canal cements, AH-26, Canals and Sealapex showed significantly reducing inhibition zones(P<0.01). 4. There were the least inhibition zones of all the root canal cements on S.mutans and followed in such order as; B.gingivalis, S.sanguis and B.cereus(P<0.01).

• Restorative Dentistry and Endodontics
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• 제17권1호
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• pp.134-140
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• 1992

The purpose of this study was to investigate the antibacterial effect of zinc oxide eugenol(ZOE), zinc phosphate cement(ZPC), glass ionomer cement, resin, and Vitapex to S. muntans, S. sanguis, S. fecalis and E. coli by agar diffusion method. Four wells were punctured in mitis-salivarius agar plate per each group and each wells were filled with restorative matetials. The width of inhibition zones produced in mitis - salivarius agar were measured as the parameter of the antibacterial effect after 16 hours and 40 hours. In S. mutans and S. sanguis, the largest inhibition zone was produced on ZOE, followed by glass ionomer cement, and ZPC. Inhibition zones was not observed in resin and Vitapex. In S. fecalis, ZOE and glass ionomer cement showed wider inhibition zone than ZPC. In E. coli, ZOE showed wider inhibition zone than ZPC, but no inhibition zone was observed on glass ionomer cement.

• 한국응용곤충학회지
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• 제5_6권
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• pp.65-69
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• 1968

본 실험에 있어서는 phenylmercuric acetate에 못지 않은 살균력을 나타낸다고 보고된 phenylemercuric 8-oxyquinolinate를 phenylmercuric acetate 와 대비시켜 벼 고마엽고병균 에 대하여 먼저 균체의 건물량에 의한 균사발육 효과를 확인하고 포자 및 균사의 호흡 저해효과를 검토한 바 그 결과를 보고하는 바이다. (1) 균사발육 억제효과를 보면 phenylmercuric 8-oxyquinolinate는 phenylmercuric acetate보다 약간 떨어지나 현저한 차이는 없으며, 양자 모두 0.01ppm부터 1.0ppm까지의 사이에서 급격히 발육 억제효과가 증가한다. (2) 포자효흡 저해작용은 0.1ppm을 제외하고는 phenylmercuric acetate가 phenylmercuric 8-oxyquinolinate보다 약간 강하나 뚜렷한 차이는 인정할 수 없으며 0.01ppm에서는 거의 저해효과가 없는 듯하다. (3) 균사호흡 저해작용은 포자호흡과는 반대로 phenylmercuric 8-oxyquinolinate 가 phenylmercuric acctate 보다 강하며, 또한 그 차도 커서 약 $10\%$쯤 된다. (4) 이상의 결과로 미루어 보아 phenylmercuric 8-oxyquinolinate의 포자발아 억제효과는 phenylmercuric acetate와 동정도이거나 약간 높으며, 균사발육 억제효과는 phenylmercuric acetate보다 낮음이 명백하다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2022년도 추계학술대회
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• pp.112-112
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• 2022

This study aims to confirm the possibility of using the invasive alien plants in Jeju as a functional biomaterial. To achieve this purpose, 70% ethanol extract and solvent fractions were prepared for five invasive alien plants (Hypochaeris radicata, Rumex acetosella, Humulus japonicus Siebold & Zucc., Solanum viarum, Lactuca scariolar) and their antioxidant, antibacterial anti-inflammatory and anti-obesity effects were investigated. The DPPH radical scavenging activity of ethanol extract from invasive alien plants was shown in the order of Rumex acetosella > Hypochaeris radicata > Humulus japonicus. Antimicrobial activity of ethanol extract against food poisoning bacteria (4 species) and oral cavity-induced microorganisms (6 species) was measured. As a result, the extract of Humulus japonicus showed high antibacterial effects against food poisoning bacteria (E. coli, V. parahaemolyticus) and oral microbes (L. casei, S. epidermidis, E. faecalis). In LPS-induced RAW 264.7 cells, the anti-inflammatory effect of ethanol extract from invasive alien plants was investigated. As a result, the NO production inhibition activity was highest in the Rumex acetosella and the Humulus japonicus Siebold & Zucc. ethanol extract, and the NO production inhibition activity was concentration-dependent. In addition, the Rumex acetosella and the Humulus japonicus Siebold & Zucc. ethanol extract showed a concentration-dependent inhibitory effect on cytokine (IL-6) production. These extracts also showed inhibitory activity of COX-2, an inflammatory protein. This suggests that NO production inhibition activity by the extract of invasive alien plants is the result of inhibition of iNOS and COX-2 expression. Currently, organic solvent fractions of crude extract are manufactured and the investigation of active ingredients is continuing along with evaluation of biological activity such as anti-inflammatory. These results are expected to be a major data for the study on the separation and utilization of active ingredients with antioxidant, antibacterial and anti-inflammatory effects using foreign plant crude extract and solvent fractions, and are highly likely to be applied to the development of functional food and cosmetics materials.

• Biomolecules & Therapeutics
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• 제9권3호
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• pp.183-187
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• 2001

Nitric oxide (NO) produced in large amounts by the inducible nitric oxide synthase (iNOS) is known to be responsible for the vasodilation and hypotension observed in septic shock and inflammation. The inhibitors of iNOS, thus, may be useful candidate for the treatment of inflammatory diseases accompanied by the overproduction of NO. We prepared alcoholic extracts of Chinese medicinal plants and screened their inhibitory activity against NO production in lipopolysaccharide (LPS)-activated macrophages. Among the 80 kinds of extracts of herbal drugs, 15 extracts showed potent inhibitory activity of NO production above 80% at the concentration o$50\mu\textrm{g}/ml$. These potent extracts showed dose dependent inhibition of NO production of LPS-activated macrophages at the concentration of 50, 30,$10\mu\textrm{g}/ml$. Especially, Rhus chinensis, Senecio scandens and Wikstroemia indica showed most potent inhibition above 50% at the concentration of $10\mu\textrm{g}/ml$. These plants are promising candidates for the study of the activity-guided purification of active compounds and would be useful for the treatment of inflammatory diseases and endotoxemia accompanying the overproduction of NO.

• 대한의생명과학회지
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• 제15권1호
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• pp.61-66
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• 2009

Leflunomide is an immunomodulatory agent used for the treatment of rheumatoid arthritis (RA). Leflunomide known as a regulator of iNOS synthesis which largely decreases NO production in diverse cell type. However, the effect of leflunomide on chondrocyte is still poorly understood. In our previous studies, we have shown that direct production of Nitric oxide (NO) by treating chondrocytes with NO donor, sodium nitroprusside (SNP), causes apoptosis via p38 mitogen-activated protein kinase in association with elevation of p53 protein level, caspase-3 activation. In this study, we characterized the molecular mechanism by which A77 1726 inhibit apoptosis. We found that A77 1726 inhibit NO-induced apoptosis as determined by MTT (Thiazolyl Blue Tetrazolium Bromide) assay and DNA fragmentation. The inhibition of apoptosis by A77 1726 was accompanied by increased PI-3 kinase and AKT activities. So, inhibition of phosphatidylinositol (PI)-3kinase with LY294002 rescued apoptosis. Triciribine, the specific inhibitor of AKT, also abolished anti-apoptotic effect. Our results indicate that A77 1726, the active metabolite of leflunomide, mediates NO-induced apoptosis in chondrocytes by modulating up-regulation of PI-3 kinase and AKT.

• Biomolecules & Therapeutics
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• 제6권2호
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• pp.159-164
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• 1998

General pharmacological properties of recombinant human parathyroid hormone (hPTH) were examined. The administration of hPTH (7, 35 and 175 lU/kg sc) in mice had no effects in general behavior and central nervous system, and no influences on normal body temperature, writhing syndromes induced by 0.7% acetic acid solution and chemoshock produced by strychnine and pentetrazol solution. hPTH (9 and 44 lU/kg, sc) given to anesthetized rabbits showed no effect on blood pressure of carotid artery and respiration, and it did not influence the responses produced by injection of acetylcholine or epinephrine. It showed no direct effect at 4.4$\times$10$_{-2}$IU/ml in isolated stomach fundus and uterus of rats and ileum of guinea-pig, and it also showed no inhibition of contraction produced by acetylcholine, oxytocin, serotonin and histamine in the above-mentioned preparations. It did not influence intestinal propulsion at the doses of 7,35 and 175 lU/kg sc in mice. This drug exhibited no effect on urinary excretion at the doses of 7 and 35 lU/kg sc in rats. However, at a dose of 175 lU/kg sc, it showed a decreased urination along with decreased excretion of potassium, sodium and chloride ion. These results indicate that hPTH does not exert any of serious pharmacological effects except the inhibition of urination at a highest dose used.