• Journal of Microbiology and Biotechnology
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• 제31권11호
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• pp.1576-1582
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• 2021

Bacterial β-glucuronidase in the intestine is involved in the conversion of 7-ethyl-10-hydroxycamptochecin glucuronide (derived from irinotecan) to 7-ethyl-10-hydroxycamptothecin, which causes intestinal bleeding and diarrhea (side effects of anti-cancer drugs). Twelve compounds (1-12) from Polygala tenuifolia were evaluated in terms of β-glucuronidase inhibition in vitro. 4-O-Benzoyl-3'-O-(O-methylsinapoyl) sucrose (C3) was highly inhibitory at low concentrations. C3 (an uncompetitive inhibitor) exhibited a k_i value of 13.4 μM; inhibitory activity increased as the substrate concentration rose. Molecular simulation revealed that C3 bound principally to the Gln158-Tyr160 enzyme loop. Thus, C3 will serve as a lead compound for development of new β-glucuronidase inhibitors.

• 대한중풍순환신경학회지
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• 제10권1호
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• pp.8-19
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• 2009

Scutellaria Radix, originated from Scutellaria baicalensis Georgi, is one of the most important medicine in traditional Oriental medicine, and possesses anti-bacterial activity and sedative effects, can be applied in the treatment of a range of conditions including diarrhea and hepatitis. It is reported that chronic global ischemia induces neuronal damage in selective, vulnerable regions of the brain, especially the hippocampus and cerebral cortex. In the present study, to investigate the effect of Scutellaria Radix extract on cerebral disease, the changes of regional cerebral blood flow and pial arterial diameter on ischemia/reperfusion state was determinated by Laser-Doppler Flowmetry and some parameters concerned with oxidative stress also measured. When SRe were administered for five days with the concentration of 100 mg/kg, GSH activity significantly increased. But SRe administeration showed no significant change in lipid peroxidation. When the activities of CAT, Cu, Zn-SOD and GSH were measured, CAT and GSH were activated by SRe administration. When 1 and 3 ㎍/㎖ SRe was applied to the neuronal cell cultures, the quantities of LDH was significantly reduced when compared with cultures treated only with NMDA. Through this study, it can be concluded that the ischemia/reperfusion induced brain stress may have contributed to cerebral damage in rats, and the present study provides clear evidence for the beneficial effect of SRe on ischemia induced brain injury.

• 한국응용과학기술학회지
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• 제35권3호
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• pp.744-756
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• 2018

본 연구는 제주산 자생 로즈마리 에센셜 오일의 항염 및 피부상재균에 대한 항균 활성을 확인하기 위한 것이다. 로즈마리 에센셜 오일은 물 증류법으로 추출하였다. 로즈마리 에센셜 오일의 항염 효능을 확인하기 위하여 RAW 264.7 세포에서 LPS에 의해 유도된 NO와 $PGE_2$의 생성을 농도 의존적으로 억제하는 것을 확인하였다. Western blot 실험을 통해 이들을 생합성하는 효소인 iNOS, COX-2 단백질의 발현이 농도 의존적으로 감소하는 것을 확인하였다. 또한 전염증성 cytokine인 TNF-${\alpha}$와 IL-6의 생성 억제 효능을 확인하였다. 항생제 내성균주 각 2종을 포함한 S. epidermidis 3종, P. acnes 3종에 대한 항균 활성을 실험한 결과, paper disc법에서 저해환이 관찰되었고, MIC, MBC 실험을 통하여 균생육 저해와 사멸를 확인하였다. 위의 실험 결과로부터 로즈마리 에센셜 오일의 항염증, 항균 효능을 확인 하였으며 향후 화장품 및 스킨케어 소재로서 활용 가능성을 확인하였다.

• 대한화장품학회지
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• 제49권3호
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• pp.277-283
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• 2023

물푸레나무(Fraxinus rhynchophylla Hance, F. rhynchophylla)는 동아시아에서 널리 사용되어 온 전통적인 약용 식물로, 만성 기관지염, 세균성 이질과 시력 개선 등을 위해 사용돼 왔다. 물푸레나무에는 esculin, esculetin, fraxin 및 fraxetin과 같은 다양한 형태의 쿠마린이 존재하며, esculetin은 항산화, 항염, 항균, 항암 및 아토피성 피부 염증 완화 등의 효과를 가지고 있다. 지금까지 물푸레나무 내 유효 성분을 증가시키는 공정개발에 관한 연구는 보고되지 않았다. 따라서 본 연구의 목적은 물푸레나무 내 esculetin함량을 증가시키고, 항염 및 항산화 효능을 증대시키기 위한 물푸레나무 생물전환 공정을 개발하는 것이다. 당분해효소 viscozyme L을 이용하여 물푸레나무에 처리한 결과 물푸레나무 효소처리물(FRE-VL)은 물푸레나무 추출물(FRE)대비 esculetin 함량이 3.1배 증가하였으며, 항염 활성 증대와 DPPH 라디칼 소거 활성의 효과를 나타내었다. 본 연구를 통해 화장품 분야에서 생물전환 기술을 적용한 물푸레나무 효소처리물의 신규 화장품 기능성 소재로의 활용 가능성을 확인하였다.

• 동의생리병리학회지
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• 제16권6호
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• pp.1277-1283
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• 2002

Silsosangami(SSG) is a formula of treaditional korean medicines as an effective biological response modifier for augmenting host homeostasis of body circulation. Little is known of the biological activity of SSG and previous studies have focused mainly on their anti-thrombosis8). There is a growing interest in the pharmacological potential of the SSG due to the recent finding by our group that SSG and each constituent herbs of SSG were able to inhibit NO and prostaglandin E2 (PGE2) synthesis in murine peritoneal macrophages stimulated with bacterial endotoxin. In this paper, the effects of SSG on platelet aggregation and hemolysis in human blood were studied. SSG provoked remarkable inhibiting effect on platelet aggregation, and APTT were sensitive to the presence of this SSG. Using an in vitro system, APTT was delayed with the increment of the concentrations of these seven compounds. These results suggested that SSG might be used as a novel antithrombotic therapeutic agents in post-myocardial infarction. A SSG reduced NO production in mouse peritoneal macrophages stimulated with lipopolysaccharide, without the influence on the activity of iNOS being observed. SSG significantly reduced mouse paw edema induced by carrageenan. Western blot analysis showed that SSG reduced the expression of iNOS. The results indicate that SSG exerts anti-inflammatory effects related to the inhibition of NO production, which could be due to a decreased expression of iNOS.

• 농업생명과학연구
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• 제45권6호
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• pp.183-191
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• 2011

In vitro 항산화 활성을 갖는 율피 추출물의 향장 소재 특성을 조사하였다. 율피로부터의 다양한 추출물 중 총 페놀성 화합물 함량은 60% 메탄올 추출물 및 에틸아세테이트 분획물이 각각 164.82 및 191.14 mg/g으로 가장 높은 것으로 나타났다. 또한, 상기 두 분획물에 의한 in vitro 항산화 활성(DPPH radical scavenging activity, lipid peroxidation 저해)은 농도 의존적으로 증가한다는 것을 확인하였다. 상기 두 분획물은 UV-B(290-320 nm) 영역에서 강한 UV 흡수도를 보여주었다. 특히, 율피 유래 두 분획물은 $1000{\mu}g/mL$에서 42.88 및 33.02%의 elastase 저해 활성을 나타내어 우수한 주름 개선 특성을 가지는 것을 보여주었다. 아울러, 율피로부터의 60% 메탄올 추출물 및 에틸아세테이트 분획물은 피부 상재균에 대하여서도 항균 활성을 지니는 것으로 나타났다. 이러한 결과들은 율피에서 추출될 수 있는 물질이 향장 산업소재로서 활용될 수 있는 가능성을 제시하는 것으로 판단된다.

• Journal of Periodontal and Implant Science
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• 제33권1호
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• pp.49-60
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• 2003

Several growth factors and polypeptides are not commonly yet used for regenerators of bone tissue or alveolar bone because of the insufficiency of studies on their side effects, genetic engineering for mass production and stability for clinical application. Recently, many herbal medicines, which have advantage of less side effects and possibility of long-term use, have been studied for their capacity and effects of anti-bacterial, antiinflammatory and regenerative potential of periodontal tissues. Morindae Radix, Cibotium Barometz (L.), Albizziae Cortex, Cistandhis Herba have been traditionally used as medicines for treatment of bone disease in Eastern medicine. The objective of the present study is to examine the ability of alkaline phosphatase (ALP) activity of human fetal osteoblast (hFOB1) when several natural medicines were supplemented. hFOB1 were cultured with Dulbecuo's Modified Eagle's Medium Nutrient Mixture F-12 HAM ( DMEM/F-12 1:1 Mixture, Sigma, USA) and negative control, dexamethasone (positive control), and each natural medicines for 3 days. And then ALP activity was measured by spectrophotometer for enzyme activity and Alizarin red S staining for morphometry. Among the natural medicines of this study, Morindae Radix, Cibotium Barometz (L.) and Cistanchis Herba induced higher activity of ALP synthesis than negative controls in all experimental group. Albizziae Cortex showed mild increases than negative control group. According to measurement of positively stained area, all of the natural medicines of this study increased compared to negative control. Especially, Cibotium Barometz (L.) and Cistanchis Herba showed statistical significance compared to negative control (p<0.05). These results indicate that Morindae Radix, Cibotium Barometz (L.), Albizziae Cortex, Cistandhis Herba have an inducing ability of ALP synthesis on osteoblast.

• 생명과학회지
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• 제15권2호
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• pp.279-286
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• 2005

손바닥선인장 추출물은 한의학에서 항염증 작용, 화상, 부종, 소화 불량 등 몇 가지의 생리학적 기능이 확인되었다. 본 연구에서는 손바닥선인장 줄기를 메탄올을 이용하여 추출한 후 그 추출물을 이용하여 항균활성을 확인한 결과 병원균 등 일반 세균에서 항균활성을 확인하였다. 특히, 약제내성균 및 혐기성 균인 여드름 원인균 뿐만 아니라 효모, 곰팡이 등 진균류에서도 항균활성을 나타내어 넓은 항균 스펙트럼을 가지고 있음을 확인할 수 있었다. 또한 열 처리, 저장온도 및 저장기간이 항균활성에 영향을 미치지 않았으므로 온도 및 기간에 안정함을 확인할 수 있었고, 식품 보존제로서의 가능성 확인 시험에서도 기존의 식품 보존제보다 안전성이 있는 항균활성 물질로 평가되었다.

• 대한영양사협회학술지
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• 제24권4호
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• pp.330-343
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• 2018

Recently, there has been a growing demand for natural preservatives because of increased consumer interest in health. In this study, we produced Lactobacillus rhamnosus cell-free supernatant (LCFS) and evaluated and compared its antimicrobial activity with existing natural preservatives against pathogenic microorganisms and in chicken breast meat contaminated with Escherichia coli and Staphylococcus aureus. Lactobacillus rhamnosus cell-free supernatant possessed 30 units of lysozyme activity and contained 18,835 mg/L of lactic acid, 2,051 mg/L of citric acid and 5,060 mg/L of acetic acid. Additionally, LCFS inhibited the growth of fourteen pathogenic bacteria, S. aureus, Bacillus cereus, Listeria monocytogenes, Vibrio parahaemolyticus, Listeria innocua, S. epidermidis, L. ivanovii, E. coli, Pseudomonas aeruginosa, Shigella sonnei, Shi. flexneri, Proteus vulgaris, Pseudomonas fluorescens, and Klebsiella pneumoniae. The antibacterial activity of LCFS was stronger than that of egg white lysozyme (EWL), Durafresh (DF) and grapefruit seed extract (GSE). Additionally, LCFS maintained its antimicrobial activity after heat treatment at $50^{\circ}C{\sim}95^{\circ}C$ and at pH values of 3~9. Moreover, LCFS inhibited the growth of E. coli and S. aureus in chicken breast meat. In conclusion, it is expected that LCFS, which contains both lysozyme and three organic acids, will be useful as a good natural preservative in the food industry.

• Journal of Microbiology and Biotechnology
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• 제29권7호
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• pp.1144-1154
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• 2019

There have been several studies regarding lichen-associated bacteria obtained from diverse environments. Our screening process identified 49 bacterial species in two lichens from the Himalayas: 17 species of Actinobacteria, 19 species of Firmicutes, and 13 species of Proteobacteria. We discovered five types of strong antimicrobial agent-producing bacteria. Although some strains exhibited weak antimicrobial activity, NP088, NP131, NP132, NP134, and NP160 exhibited strong antimicrobial activity against all multidrug-resistant strains. Polyketide synthase (PKS) fingerprinting revealed results for 69 of 148 strains; these had similar genes, such as fatty acid-related PKS, adenylation domain genes, PfaA, and PksD. Although the association between antimicrobial activity and the PKS fingerprinting results is poorly resolved, NP160 had six types of PKS fingerprinting genes, as well as strong antimicrobial activity. Therefore, we sequenced the draft genome of strain NP160, and predicted its secondary metabolism using antiSMASH version 4.2. NP160 had 46 clusters and was predicted to produce similar secondary metabolites with similarities of 5-100%. Although NP160 had 100% similarity with the alkylresorcinol biosynthetic gene cluster, our results showed low similarity with existing members of this biosynthetic gene cluster, and most have not yet been revealed. In conclusion, we expect that lichen-associated bacteria from the Himalayas can produce new secondary metabolites, and we found several secondary metabolite-related biosynthetic gene clusters to support this hypothesis.