• 생약학회지
• /
• 제27권4호
• /
• pp.383-388
• /
• 1996

The objective of this reseach is to find new antitumoral substances from natural products. Several of natural products have been used as food that were isolated into hexane(Hex.) and/or ethylacetate(EtOAc) extracts. we have tested cytotoxicities of these plants against human solid tumor cells. The cytotoxic activity of these plants were tested using Sulforhodamin B(SRB) assay. Hexane extracts of Chrysanthemum sinense, Allium tubersum. Beta vulgaris, Ixeris dentata have revealed cytotoxicities against five human solid tumor cells, and its cytotoxicities of each cell line were $10-100\;{\mu}l/ml$ ED50 (Effective dose that cause 50% inhibition of cell growth in vitro)

• 생약학회지
• /
• 제26권2호
• /
• pp.154-158
• /
• 1995

Twentyfive plant crude drugs with traditional reputation were selected for the antithrombotic screening. MeOH (80%) extract of each plant was given (500 mg/Kg, p.o.) to mice 1 hr prior to the thrombotic challenge (1.8 mg collagen plus 180 ug epinephrine/Kg, i.v.). Seven extracts (1, 2, 8, 10, 18, 22 and 23) showed either comparable or better recovery than aspirin (50 mg/Kg, p.o.) from paralysis caused by the pulmonary thrombosis. 1, 2, 8, 10, 18, 22 and 23 were fractionated to $CH_2Cl_2$ soluble (fr I) and $H_2O$ soluble (fr II) fractions and each fraction (100 mg/Kg, p.o.) was also tested. Mice treated with fr I of 2 (Angelica koreana), 10 (Corydalis spp.) or 23 (Schizonepeta tenuifolia) showed higher recovery and lower mortality rates than aspirin (50 mg/Kg, p.o.) treated mice.

• 생약학회지
• /
• 제23권2호
• /
• pp.106-114
• /
• 1992

The acute toxicity and the effect of steam distillate obtained from several plant mixtures (G-3) on the reactivation of brain, lung, and blood acetylcholinesterase (AChE) activity, and recovery from other toxic symptoms following intoxication by organophosphate pesticides were investigated in mice and mudfish. Administration of G-3 $(50{\sim}100\;ml/kg,\;i.p.)$ immediately or 30 min prior to Diazinon or Sumithion treatments, respectively, resulted in a significant reactivation of AChE activity in brain, lung, and blood, their potencies being almost equipotent to those of 2-PAM, one of well-known antidotes. G-3 itself exhibited almost no acute toxicity even at the highest dose employed, and without effect on the inhibition of hepatic drug metabolism function following organophosphate administrations. G-3 showed a significant diminution of the death rate in mudfish as well as in mice intoxicated by Diazinon.

• 한국안광학회지
• /
• 제10권4호
• /
• pp.365-373
• /
• 2005

본 연구는 한방에서 안질환 치료에 효과가 있다고 알려져 있거나 안질환 치료제로서의 사용 가능성이 연구되어 온 7종의 천연물들의 항산화 작용에 대해 알아보았다. 복분자, 석곡, 곡정초, 여정자, 결명자, 매미허물, 진황정의 메탄올 추출물들은 DPPH radical 전자공여능 검사에서 정도의 차이는 있으나, 모두 항산화작용을 가지고 있었으며, 그 중 복분자와 석곡은 ascorbic acid나 BHT와 유사한 정도의 전자공여능을 가지고 있었다. 여정자의 메탄올 추출물은 $200{\mu}g/m{\ell}$의 농도에서 0.1 mM ascorbic acid와 같은 SOD 유사활성을 가지고 있었으며, 복분자의 메탄올 추출물은 과산화수소에 의한 ABTS radical 생성 저해작용이 뛰어났다. 또한 결명자는 아질산염 소거작용이 우수하였다. 이러한 천연물들의 항산화작용은 그들의 안질환 치료효과와 관련이 있을 것으로 여겨진다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제15권10호
• /
• pp.1458-1468
• /
• 2002

There is increasing interest in exploiting natural products as feed additives to solve problems in animal nutrition and livestock production. Essential oils and saponins are two types of plant secondary compounds that hold promise as natural feed additives for ruminants. This paper describes recent advances in research into these additives. The research has generally concentrated on protein metabolism. Dietary essential oils caused rates of NH$_3$ production from amino acids in ruminal fluid taken from sheep and cattle receiving the oils to decrease, yet proteinase and peptidase activities were unchanged. Hyper-ammonia-producing (HAP) bacteria were the most sensitive of ruminal bacteria to essential oils in pure culture. Essential oils also slowed colonisation and digestion of some feedstuffs. Ruminobacter amylophilus may be a key organism in mediating these effects. Saponin-containing plants and their extracts appear to be useful as a means of suppressing the bacteriolytic activity of rumen ciliate protozoa and thereby enhancing total microbial protein flow from the rumen. The effects of some saponins seems to be transient, which may stem from the hydrolysis of saponins to their corresponding sapogenin aglycones, which are much less toxic to protozoa. Saponins also have selective antibacterial effects which may prove useful in, for example, controlling starch digestion. These studies illustrate that plant secondary compounds, of which essential oils and saponins comprise a small proportion, have great potential as 'natural' manipulators of rumen fermentation, to the potential benefit of the farmer and the environment.

• 생약학회지
• /
• 제37권4호
• /
• pp.307-313
• /
• 2006

Reactive oxygen species (ROS) and formation of advanced glycation end products (AGEs) play an important role in the pathogenesis of diabetic nephropathy by hyperglycemia. To find natural agents improving diabetic nephropathy, 63 natural resources which used to the treatment of diabetes mellitus in a folk remedy were investigated with an in vitro system employing radical scavenging activity and inhibitory activity of AGEs formation. In results, the extracts of Aspalathus linearis, Rubus coreanus, Rosa rugosa, and Epimedium koreanum significantly inhibited the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical with $IC_{50}$ values less than $10{\mu}g/ml$. The extracts of Zea mays, Cucurbita moschata, Cudrania tricuspidata, and Aspalathus linearis effectively reduced the formation of AGEs compared with the positive control $N-acetyl-_L-cystenine$ (NAC) and aminoguanidine (AG). In addition, the extracts of Aspalathus linearis, Commelina communis, Cornus officinalis, and Lespodeza cuneata showed the all inhibitory activity against DPPH radical and AGEs formation. Also, these resources definitely showed the radical scavenging activity against peroxynitrite $(ONOO^-)$ and hydroxyl radical $({\cdot}OH)$ relating to high glucose-induced ROS production. Thus, these results suggest that some natural resources may regulate the initiation and progression of diabetic nephropathy through inhibition of ROS production and AGEs formation.

• 한국축산식품학회지
• /
• 제41권1호
• /
• pp.8-15
• /
• 2021

Vegetarians have claimed and actively promoted the advantages of plant-based alternative milks as the best option for human nutrition and health, compared to the natural dairy milk. However, numerous scientific evidences and reports have demonstrated that the natural milk possesses more beneficial nutrients and bioactive components than artificially manufactured plant-derived milks. The biochemical and nutritional advantages and functionalities of natural dairy milk cannot be replaced by man-made or crafted plant-based beverage products. On the other hand, the tremendous increase in production and consumption of the plant-based alternative milks in recent years has led a serious business downturn in traditional roles and stability of the dairy industry, especially in the major dairy producing Western countries. Although plant-based milk alternatives may have some benefits on nutrition and health of certain consumers, the plant-derived alternative milks may not overshadow the true values of natural milk. Milk is not a high fat and high cholesterol food as animal meat products. Unlike plant-based alternative milks, natural milk contains many bioactive as well as antiappetizing peptides, which can reduce body weight. It has proven that taking low-fat, cultured and lactase treated milk and dairy products with other diversified nutritionally balanced diets have been shown to be healthier dietary option than plant-based milk/foods alone.

• 생약학회지
• /
• 제22권1호
• /
• pp.45-50
• /
• 1991

The combined effect of berberine isolated from the bark of Phellodendron amurense and some antibiotics was evaluated in order to measure the antibiotic activities. In this study, in the presence of streptomycin, tetracycline, cephradine as antibiotics, Staphylococcus aureus, Escherichia coli, Shigella sonnei as microorganisms were grown in an Automated Microbiology System. In case of Staphylococus aureus, combination with berberine and cephardine resulted in the strongest synergistic activity and in case of Escherichia coli and Shigella sonnei, combination with berberine and streptomycin resulted in the strongest synergistic activity. The combination with berberine and antibiotics increased the antibiotic activities, thereby showing a synergistic action.

• Toxicological Research
• /
• 제11권2호
• /
• pp.309-313
• /
• 1995

The aim and objective of this study are to carry out the liver protective activities against the $CCl_4$ intoxication in mice with some Iranian medicinal plants traditionally used for liver injuries. The methanol extracts of Cichorium intybus, Lactuca scarJoia, Eucalyptus camadulensis were evaluated. With various doses of these plants, liver protective activities were performed after $CCl_4$ administration to mice. The serum aminotransferases activites, liver sizes, and histopatological examinations of liver were studied. At a dose of 50 mg/ kg, all three plants were able to protect liver damages induced by $CCl_4$.

• 대한약학회:학술대회논문집
• /
• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
• /
• pp.321.1-321.1
• /
• 2002

To indentify inhibitors of melanogenesis. we compared the effect of some natural products on mushroom tyrosinase. human melanocytic tyrosinase activity and melanin content. The cytotoxicity of the component were also tested on cultured mouse melanoma cells, Each extract significantly inhibited tyrosinase activity and melanin synthesis in vitro and B 16 melanoma cell lines. In B 16 cell lines, watermelon's inner shell extract inhibited tyrosinase activity as strong as kojic acid at 150${\um}g$/${\mu}\ell$ concentration. And morning glory'seed extract inhibited melanin synthesis more than kojic acid at 150${\um}g$/${\mu}\ell$ concentration. Each extract were strong inhibitors of tyrosinase activity and total melanin synthesis in B 16 mouse melanoma cell lines at less than 100${\um}g$/${\mu}\ell$ concetration. These result show that extract of watermelon's inner shell. lettuce. morning glory's seed and licorice root could be developed as skin whitening component of cosmetics.