• Journal of Applied Biological Chemistry
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• 제65권1호
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• pp.75-79
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• 2022

겨우살이(Viscum album var. coloratum)의 80% 에탄올 추출물의 항산화, α-glucosidase 저해 및 항응고 효과를 확인하였다. 겨우살이 추출물의 수율은 30.9±0.4%이었고, 폴리페놀 함량은 57.6±1.5 mg GAE/g으로 나타났다. 겨우살이 추출물의 농도에 비례하여 유리라디칼 및 양이온라디칼 소거능, 아질산염 소거능, 환원력의 항산화 효과가 증가하였다. 또한 겨우살이 추출물은 α-glucosidase의 활성을 저해하였고, 혈액응고 체계의 외인성 경로와 공통 경로를 주로 저해함으로써 혈장 응고를 억제하였다.

• Natural Product Sciences
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• 제8권4호
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• pp.155-161
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• 2002

The mistletoe lectins are major active components in the extract of European mistletoe (Viscum album L) that have been widely used in adjuvant chemotherapy of cancer. This study was performed to investigate the antitumor activity of extract of Korean mistletoe (Viscum album var. coloratum) modified with Korean mistletoe lectin (Viscum album var. coloratum agglutinin, VCA). Compared with the results of VCA, survival rate was increased and experimental lung metastasis was reduced by treatment of modified extract (VCM). In addition, the treatment of VCM reduced angiogenesis and VCA-induced toxicity measured by a CAM assay. And VCM inhibited proliferation and induced apoptosis in vitro in tumor cells originated from tissues which are possible to apply topically without surgery. Taken together, the antitumor activities of VCM-treated group outperformed the activities of the VCA-treated group.

• Natural Product Sciences
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• 제8권4호
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• pp.152-154
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• 2002

The methanol extract of Viscum album var. coloratum, Korean mistletoe, showed potent prolongation effects on the bleeding time in rats in vivo, and whole blood clotting time and plasma recalcification time in rats ex vivo. The prolongation effect on the bleeding time of Korean mistletoe is comparable to that of Viscum album L., European mistletoe, 185.6% and 176.5%, respectively. However, the water extracts of the both plants did not show any prolongation effects. Platelet activating factor (PAF) receptor binding assay was carried out to elucidate the action mechanisms of the extracts, and both of the methanol extracts did not show any inhibitory activity. The $LD_{50}$ of the methanol extracts of both mistletoes are more than 2 g/kg. These results suggest that the mehtanol extract of Korean mistletoe might be a potential candidate to develop new drug to improve microcirculation.

• Applied Biological Chemistry
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• 제47권2호
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• pp.279-282
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• 2004

An antioxidant was isolated from Korean mistletoe (Viscum album var. coloratum) by consecutive purification using silica gel, Sephadex LH-20, and RP-HPLC. The active principle was identified as homo-flavoyadorinin-B (3',7-dimethoxyluteolin-4'-O-[apiosyl $(1{\rightarrow}2)$ glucoside]) by spectral analyses. It inhibited 74.6% of hydroxyl radical and 30.6% of superoxide anion radical at 0.01 mM; however, th~compound did not show any scavenging activity against hydrogen peroxide radical. At 0.1 mM, above compound scavenged superoxide anion radical about twice as effective as positive controls, BHT and ${\alpha}-tocopherol$. Radical scavenging activities of homo-flavoyadorinin-B on DPPH, hydroxyl, and hydrogen peroxide radicals were almost same with those of positive controls.

• Journal of Forest and Environmental Science
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• 제29권2호
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• pp.173-180
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• 2013

Berries of Korean mistletoe (Viscum album var. coloratum [Kom.] Ohwi) contained one seed, which have, in general, one or two embryos but very rarely three embryos. Mucilaginous substances in berries may help them adhere to the branches of host trees. It was observed that seeds need more than one and half years to develop into normal and healthy seedlings from the time of inoculation. Many factors such as adhesion of berry, thickness of host branch, orientation of haustorial root, etc. influenced the successful development of mistletoe plants. Through the application of six-year observation results on the germination of seeds and growth of seedlings, about 80% of germination rate for mistletoe seeds and 61% of survival ratio for germinated seeds, which is more than 23 times higher in natural conditions, were obtained after inoculation of seeds on the one-year-old branches of Malus pumila var. dulcissima and Quercus mongolica trees. The technological aspects of the success can be applied to other host plants and provide a critical clue to an artificial propagation system, for this medicinally valuable genus. This is the first successful report on artificial inoculation and plant development of Korean mistletoe.

• 대한화장품학회지
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• 제48권3호
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• pp.265-273
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• 2022

본 연구에서는 한국산 겨우살이 (Viscum album L. var. coloratum)이 아토피 피부염과 관련된 염증성 사이토카인에 영향을 미치는지 여부를 알아보았다. 실험에는 헥산, 부탄올, 에틸아세테이트, 메틸렌클로라이드, 총 4 가지 분획물을 사용하였으며, RAW264.7 마우스 대식세포와 RBL-2H3 렛트 호중구를 이용하여 염증성 마커를 연구하였다. 실험 결과 에틸아세테이트 분획이 tumor necrosis factor alpha (TNF-α), interleukin(IL)-6, IL-4의 mRNA 발현 및 단백질 분비량을 감소시켰으나, 헥산 분획은 뚜렷한 효능이 없었다. 또한 부탄올 분획은 IL-4, IL-6의 mRNA 발현을 감소시켰고, 메틸렌클로라이드 분획은 IL-4와 TNF-α의 mRNA 발현을 감소시켰다. 결과적으로 한국산 겨우살이(V. album var. coloratum)가 아토피 피부염과 관련된 사이토카인 분비를 억제시켜 항염증 효과를 나타낼 수 있으므로, 이와 관련된 기능성 화장품 개발이 가능할 것으로 사료된다.

• 대한화장품학회지
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• 제48권4호
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• pp.295-302
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• 2022

본 연구에서는 한국산 겨우살이(Viscum album var. coloratum)의 항산화, 항노화, 미백 효능을 알아보았다. 겨우살이 분획물은 hexane (HX), ethyl acetate (EA), butanol (BU), methylene chloride (MC) 총 4 가지를 사용하였다. 실험 결과 HX 분획물이 4 가지 분획물 중 가장 높은 페놀 함량을 보였다. 또한 EA 분획물이 가장 높은 1,1-diphenyl-2-picrylhydrazyl (DPPH)자유 라디칼 소거능 및 catalase-유사 활성을 나타내었으며, MC 분획물이 가장 높은 superoxide dismutase (SOD)-유사 활성을 나타냈다. MC 분획물은 또한 가장 우수한 hyaluronidase와 elastase 억제능을 보였다. 미백 효능을 알아보기 위하여 tyrosinase 억제능을 알아보았는데, HX 분획물이 가장 우수한 억제능을 보여주었다. 본 연구 결과를 통하여 한국산 겨우살이는 항산화, 항노화 및 미백 활성을 가지는 기능성 화장품 소재로 사용이 가능할 것으로 보인다.

• Archives of Pharmacal Research
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• 제21권4호
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• pp.429-435
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• 1998

Lectins and its A- and B-chains from Korean mistletoe (Viscum album var. coloratum) were isolated by affinity chromatography on the Sepharose 4B modified by lactose-BSA conjugate synthesized by reductive amination of ligand (lactose) to .epsilon.-amino groups of lysine residues of spacer (BSA) after reduction by $NaCNBH_3$. The lactose-BSA conjugate was coupled to Sepharose 4B activated by cyanogen bromide. The molecular weight determined by SDS-PAGE were a 31 kD of A-chain and a 35kD of B-chain. Amino acid analysis and N-terminal sequencing were performed. The effects of pH, temperature and guanidine chloride on the conformation of the lectin were investigated by measuring its intrinsic fluorescence and compared with its hemagglutinating activities. Blue shift was detected on the acidic pH and there was a close relationship between activities and conformation of the lectin. Under denaturing conditions, the tryptophan emission profile of lectin showed typical denaturaiional red shift which also correspond to the conformations and activity of lectin.

• Archives of Pharmacal Research
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• 제23권6호
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• pp.592-598
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• 2000

A lectin (agglutinin, VCA) from Korean mistletoe (Viscum album L. coloratum) was isolated by affinity chromatograpy on a asialofetuin-Sepharose 4B. The molecular weights of A- and B-chains of VCA were different from those of VAAS. The VCA recognized the antibody of VAAs in the Western blot analysis and ELLA system. We also investigated the synergistic effects of the components in mistletoe by dividing the extract into different molecular weight fractions.

• 한국자원식물학회지
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• 제28권6호
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• pp.710-717
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• 2015

Humankind has been searching for medicinal materials from various plant sources in an attempt to treat disease. Mistletoe is one indubitable plant source for these materials due to its effectiveness in treating various diseases, but it has almost disappeared from the mountainous areas of Korea due to excessive harvesting. In this study, in order to select host tree species for Korean mistletoe [Viscum album var. coloratum (Kom.) Ohwi] by seed inoculation and to clarify the effect of host specificity among various tree species were conducted for the purpose of gaining basic information for the artificial cultivation of Korean mistletoe. Almost all the seeds of Korean mistletoe germinated in vitro at the temperature of 15℃. Among host trees used in this study, Prunus mume showed the highest parasitic affinity with inoculated Korean mistletoe, compared with any other host plants. However, treatment of hormones could not increase the low survival rate of Korean mistletoe on the host trees.