• 식물분류학회지
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• 제51권2호
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• pp.171-175
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• 2021

Daphne genkwa (Thymelaeaceae) is a small deciduous shrub widely cultivated as an ornamental. The complete chloroplast genome of this species is presented here. The genome is 132,741 bp long and has four subregions: 85,668 bp of large single-copy and 28,365 bp of small single-copy regions are separated by 9,354 bp of inverted repeat regions with 107 genes (71 protein-coding genes, four rRNAs, and 31 tRNAs) and one pseudogene. The phylogenetic tree shows that D. genkwa is nested within Wikstroemia and is not closely related to other species of Daphne, suggesting that it should be recognized as a species of Wikstroemia.

• IMMUNE NETWORK
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• 제15권2호
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• pp.91-99
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• 2015

Herpes simplex virus (HSV) is a common causative agent of genital ulceration and can lead to subsequent neurological disease in some cases. Here, using a genital infection model, we tested the efficacy of vinegar-processed flos of Daphne genkwa (vp-genkwa) to modulate vaginal inflammation caused by HSV-1 infection. Our data revealed that treatment with optimal doses of vp-genkwa after, but not before, HSV-1 infection provided enhanced resistance against HSV-1 infection, as corroborated by reduced mortality and clinical signs. Consistent with these results, treatment with vp-genkwa after HSV-1 infection reduced viral replication in the vaginal tract. Furthermore, somewhat intriguingly, treatment of vp-genkwa after HSV-1 infection increased the frequency and absolute number of $CD3^-NK1.1^+NKp46^+$ natural killer (NK) cells producing interferon (IFN)-${\gamma}$ and granyzme B, which indicates that vp-genkwa treatment induces the activation of NK cells. Supportively, secreted IFN-${\gamma}$ was detected at an increased level in vaginal lavages of mice treated with vp-genkwa after HSV-1 infection. These results indicate that enhanced resistance to HSV-1 infection by treatment with vp-genkwa is associated with NK cell activation. Therefore, our data provide a valuable insight into the use of vp-genkwa to control clinical severity in HSV infection through NK cell activation.

• Natural Product Sciences
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• 제20권2호
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• pp.80-85
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• 2014

In the course of screening for antioxidant compounds from natural plants in Korea by measuring the radical scavenging effect, a methanol extract of the flower buds of Daphne genkwa S. et Z. (Thymelaeaceae) was found to show a potent antioxidant activity. Subsequent activity-guided fractionation of methanol extract of D. genkwa led to the isolation of four compounds from the ethyl acetate soluble fraction. The chemical structures were elucidated as genkwanin (1), 3'-hydroxygenkwanin (2), apigenin (3), and tiliroside (4) by spectroscopic techniques. Among them, compound 2 showed the significant anti-oxidative effect on DPPH. And compound 2 showed the significant riboflavin-and xanthine-originated superoxide quenching activities. To verify the antioxidant enzymatic activities of compound 2, the SOD enzymatic activity was measured spectrophtometrically using prepared Caenorhabditis elegans homogenates. The results showed that compound 2 was able to elevate SOD activity of C. elegans in a dose dependent manner. Moreover, compound 2 decreased the intracellular ROS accumulation of worms.

• Bulletin of the Korean Chemical Society
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• 제35권2호
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• pp.669-671
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• 2014

• 식물분류학회지
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• 제47권3호
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• pp.207-221
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• 2017

한국산 팥꽃나무과 분류군 5속 10종(Daphne속 5종, Diarthron속 1종, Edgeworthia속 1종, Stellera속 1종 및 Wikstroemia속 2종)에 대해 비교형태학적 연구를 수행하였다. 야외 조사와 국내외 주요 표본관에 소장된 표본을 이용하여 팥꽃나무의 주요 형태형질을 정의하고, 변이의 폭을 파악하여, 각 분류군의 한계를 설정하고 유연관계를 추론하였다. 그 결과 한국산 팥꽃나무과 분류군들은 형태형질에 의해서 뚜렷이 구분되었다. 팥꽃나무속의 경우 한국산 분류군만 고려하면 산닥나무속과 쉽게 구분되었으나, 팥꽃나무(D. genkwa)는 잎의 배열과 털의 분포 및 자방의 형태에 있어서 산닥나무속과 공통적인 특징을 보이고 있었다. Daphne group에 대해 보다 많은 분류군과 다른 종류의 형질분석을 통하여 자세한 연구가 필요한 것으로 사료된다.

• 한국응용곤충학회지
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• 제50권4호
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• pp.315-324
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• 2011

본 연구는 우리나라의 작물 재배지에서 문제가 되고 있는 뿌리혹선충의 환경친화적 방제를 위하여 30종의 약용식물(32 시료)을 선발하여 당근뿌리혹선충 2령충과 알에 대한 살선충 효과와 난 부화억제 효과를 검정하였다. 약용식물 추출물들 중 원화(Daphne genkwa), 건강(Zingiber officinale), 정향(Eugenia caryophyllata), 사군자(Quisqualis indica) 등이 1,000 ppm 농도에서 당근뿌리혹선충 J2 유충에 대하여 80%이상의 살선충 활성을 보였다. 이들 중 원화와 사군자는 125 ppm에서도 91 %와 99%의 살선충 활성을 보였다. 추출방법(메탄올 또는 헥산, 온수추출, 냉수 추출)에 따라 살선충 효과에 차이를 보였는데 건강과 사군자는 1,000 ppm 온수추출물 처리 시 각각 99%의 살선충 효과를 보였고, 냉수추출물에서는 36%와 98%의 살선충 효과를 보였다. 사군자는 모든 추출물 처리에서 높은 살선충 활성을 보였다. 빈랑(Areca catechu)과 원화, 청주항(Desmodium caudatum), 흑축(Pharbitis nil), 사군자, 건강 추출물을 이용하여 당근뿌리혹선충 알의 부화억제 효과를 조사한 결과 1,000 ppm 농도에서 원화와 흑축, 사군자 처리는 처리 7, 14, 21 일째까지 낮은 부화 수를 나타내었다. Pot와 인삼 밭에서 1,000 ppm 농도의 사군자 메탄올 추출물 처리 시 토양 중의 당근뿌리혹선충 밀도를 유의하게 감소시켰다. 따라서 사군자 추출물은 당근뿌리혹선충의 환경친화적 방제에 활용 가능할 것으로 판단된다.

• Natural Product Sciences
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• 제6권4호
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• pp.183-188
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• 2000

In order to discover novel potent antitumor agents, methanolic extracts of approximately 180 herbal medicines were prepared and primarily evaluated for cytotoxic activity in cultured human lung (A549) and colon (Col 2) cancer cells. As a result, 17 natural product extracts were found to be active in the criteria of $IC_{50}$<$20\;{\mu}g/ml$. Especially, the extracts of Aristolochia debilis, Cynanchum ascyrifolium, Cynanchum paniculatum, Daphne genkwa, Euphorbia lathyris, Ipomoea hederacea, Magnolia officinalis, Melia azedarach var. japonica, Solanum nigrum, Thuja orientalis, and Trichosanthes kirilowii showed a strong cytotoxic potential. The flower extract of Daphne genkwa was more selective cytotoxic activity against lung cancer cells $(IC_{50};\;0.2\;{\mu}g/ml)$ compared to colon cancer cells $(IC_{50}>20\;{\mu}g/ml)$. In addition, based on the cytotoxic potential of the root extract of Cynanchum paniculatum, the further fractionation of methylene chloride partition with silica gel column chromatography was performed. Several subfractions were considered to be active, and thus indicating that further studies for the identification of active principles from these fractions might be warranted.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2020년도 춘계학술대회
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• pp.27-27
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• 2020

Daphne L. (Thymelaceae) comprises about 95 species distributing worldwide from N Africa, N India, SE Asia to E Asia and the coast of the Mediterranean of Europe. In Korea, five species of this genus have been described. In this study, we included four species (D. genkwa, D. pseudomezereum, D. kiusiana, D. jejudoensis) from Korea, excluding cultivated D. odora. The morphological characters through local surveys and the re-classification of the specimens collected in the Korea National Herbarium (KH) were carried out and distribution maps for each taxon were also prepared. The major characters include habit, trichomes in winter bud, leaf, and twig, phyllotaxis, inflorescence, size of calyx lobe and trichomes in the calyx tube, etc. The distribution map showed that D. genkwa is mainly distributed in the coastal area of Hwanghaenam-do, Pyeongannam-do, Jeollabuk-do and Jeollanam-do, whereas D. pseudomezereum is distributed in the limestone zone of Gangwon-do, Jeollabuk-do, and Gyeongsangbuk-do. Similarly, D. kiusiana is mostly found in Jeollanam-do, Gyeongsangnam-do, and Jeju-do. In addition, D. jejudoensis is known to be distributed in forests of Murueng, Andeok, and Seonheul-ri in Jeju-do, but recently, new habitat is discovered in the island forest areas of Jeollanam-do. However, some of these individuals showed the characteristics of D. kiusiana, thus before come to any conclusion detailed taxonomic review of D. jejudoensis and D. kiusiana is required.

• 생명과학회지
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• 제34권6호
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• pp.408-417
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• 2024

원화(Daphne genkwa (Siebold & Zucc))의 50% 에탄올 추출물인 PB-81이 소 로타바이러스 설사병 환축에서 설사병의 치료효과와 바이러스 증식 억제 효과가 나타나는가를 확인하였다. PB-81에 의해 상피세포주인 A549 세포와 혈액세포주인 NK92 세포에서 각각 IFN-β와 IFN-γ가 유도되는 것을 확인하였다. PB-81의 바이러스의 증식억제 효과를 확인하기 위해 PB-81을 MBDK 세포에 바이러스의 감염 전, 동시, 감염 후에 투여하는 세 가지 경우에서 바이러스 억제효과를 확인한 결과 PB-81을 투여한 모든 경우에서 바이러스가 억제되었으며, 바이러스 감염 전에서 투여하는 경우에서 가장 좋은 바이러스 억제효과가 나타났다. 마우스에서의 독성검사에서는 투여최대용량인 20 mg/mL에서도 독성에 따른 부작용이 나타나지 않았다. 소 로타바이러스 설사병 환축 16두와 대조군 4두를 대상으로 한 치료효과 검증에는 20 mg/5 mL 용량의 PB-81을 투여한 결과, PB-81을 투여한 모든 소 로타바이러스 설사병 환축이 완치되었으며 PB-81의 투여 후에 완치까지 소요된 기간은 PB-81투여군이 평균 2.25일이었고, PB-81을 투여하지 않은 대조군이 6.5일로 PB-81의 투여에 의한 소 로타바이러스 설사병의 치료효과가 나타나는 것을 확인하였으며 PB-81을 투여한 모든 환축에서 부작용이 검출되지 않았다.

• 생약학회지
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• 제35권1호통권136호
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• pp.62-79
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• 2004

Cell-scattering is a phenotypic change easily observed in most epithelial cells treated with Hepatocyte Growth Factor /scatter Factor (HGF/SF) or phorbol esters (PKC-activators). Recent studies have shown the possibilities to use as therapeutic materials of HGF/SF or non tumor promoting phorbol esters for liver disease, cancer and AIDS. In this study, we tested a cell-scattering activity of 534 methanol extracts from plants inhabiting in Korean peninsula using the phenotype-based assay system. Nine Active extracts were detected : Daphne genkwa, Daphne kiusiana, and Aleurites fordii showed high activity (+++), Euphorbia sieboldiana and Rhodotypos scandens showed medium activity (++), Sambucus sieboldiana var. pendula, Catalpa bignonioides, Sambucus sieboldiana and Lycoris squamigera showed low activity (+). Furthermore, the effects of these active materials in the culture cells were investigated with biochemical studies.