• 농약과학회지
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• 제16권4호
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• pp.267-272
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• 2012

합성농약의 단점을 보완하기 위하여 무공해, 무독성의 환경 친화적인 농약이 요구되고 있다. 특히, 식물 유래 천연물이 각광받고 있으며 이러한 관점에서 선행 실험 결과 강한 항균활성을 나타낸 만형자(Vitex trifolia L.)로부터 항균활성물질을 분리하여 기기분석을 통해 화학구조를 결정하고, 항균활성 검정을 실시하였다. 만형자를 80% aqueous MeOH로 추출한 후 n-hexane, EtOAc, n-BuOH 및 $H_2O$ 등 4개의 층으로 분획하였다. 이들 분획물을 이용하여 2000 ppm 수준으로 6가지 식물병원균에 대해 in vivo 항균활성을 검정한 결과, n-hexane 분획물이 벼 도열병균에 대해 88%, EtOAc 분획물이 벼 도열병균에 대해 85%, 밀 붉은녹병에 대해 87%의 방제효과를 나타내었다. Silica gel column, Sephadex LH-20 column chromatography, preparative HPLC를 사용하여 단일 화합물로 분리한 다음, ESI-MS, $^1H$-NMR, $^{13}C$-NMR의 기기분석 결과를 해석하여 agnuside, chrysosplenol B, artemetin로 구조를 동정하였다. Chrysosplenol B는 만형자로부터 처음 분리되었다. 분리한 물질들의 in vitro 및 in vivo 항균활성에 대한 연구를 진행하고 있다.

• 생약학회지
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• 제25권3호
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• pp.214-220
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• 1994

From the Viticis Fructus n-hydrocarbons, ${\beta}-sitosterol$ $3-O-{\beta}-_D-glucoside$ and hesperidin along with the known polyoxygenated flavonoids such as vitexicarpin, artemetin and luteolin, and vanillic acid were isolated and identified by means of spectroscopic methods. HPLC analysis of the flavonoid components from the MeOH extract was established. Phytochemical analyses of the domestic plant sample and the imported ones were conducted and the flavonoid compositions of the domestic samples were greatly different from those of the imported ones.

• Journal of Applied Biological Chemistry
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• 제52권4호
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• pp.180-186
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• 2009

본 연구에서는 염생식물의 한 종인 순비기나무의 추출 분획물 및 화합을 이용하여 항발암성 및 생체방어 물질로서의 유용성을 검토하고자 4종의 인체 암세포(HT1080, AGS, MCF-7 및 HT-29)에 대한 증식억제 효과를 검토하였다. 추출물에 대한 암세포 증식억제능 측정 결과, 10, 50 및 $100\;{\mu}g/mL$의 시료 처리 농도에서 농도 의존적으로 암세포의 생존율이 감소하는 경향을 확인하였으며, 모든 세포주에 대하여 methanol 추출물 보다 methylene chloride 추출물이 뛰어난 효과를 나타냄을 알 수 있었다. 따라서, 물질의 극성도에 따른 암세포 증식억제능을 확인하고자 추출물을 순차적으로 용매 분획하여 $H_2O$, n-BuOH, 85% aq. MeOH 및 n-hexane의 네 가지 분획층을 얻었으며, 추출물과 동일한 조건하에서 암세포 증식억제 효과를 재검토하였다. 그 결과, 비교적 극성이 덜한 85% aq. MeOH 분획층에서 우수한 암세포 증식억제능이 확인되었다. $100\;{\mu}g/mL$의 농도에서 85% aq. MeOH 분획층의 시료를 처리한 결과 HT1080, AGS, MCF-7 및 HT-29 세포는 각각 93.8, 91.6, 90.9% 그리고 82.7%의 강력한 억제 효과를 나타내었으며, 낮은 농도의 시료($10\;{\mu}g/mL$)를 처리한 결과에서도 HT1080과 AGS 세포에서 주목할 만한 억제효과를 보여 주었다. 생리활성 결과를 바탕으로 85% aq. MeOH 분획층의 분리를 통해 1종의 화합물을 분리할 수 있었으며, artemetin으로 알려진 화합물로 확인되었다. 분리된 화합물의 암세포 증식억제 효과를 확인해 본 결과 HT1080 세포에 선택적으로 효과를 보임을 확인하였으며, 그 효과는 항암제인 doxorubicin에 상응하는 결과였다. 따라서 본 연구를 통해 염생식물 순비기나무의 각종 인체 암세포에 대한 높은 증식억제 효과와 함께 암예방을 위한 기능성 소재로서의 개발 가능성이 확인되었다. 추후 순비기나무의 85% aq. MeOH 분획층 및 분리된 화합물에 대한 집중적인 연구를 통해 새로운 생리활성물질의 개발이 기대되어진다.

• Ocean and Polar Research
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• 제33권3호
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• pp.255-263
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• 2011

The aim of this investigation was to evaluate antioxidant activity of crude extracts from the halophyte Vitex rotundifolia, their solvent fractions, and isolated compounds (1-3). Antioxidant capacity was determined by measuring DPPH radical, and authentic $ONOO^-$ and $ONOO^-$ generated from 3- morpholinsydnonimine (SIN-1) in vitro as well as degree of occurrence of intracellular ROS, NO and GSH in mouse macrophage Raw 264.7 cells. From comparative analysis, MeOH extract, n-BuOH, and 85% aq. MeOH solvent fractions showed significant antioxidant effect in DPPH radical and $ONOO^-$ assay systems. Activity-guided purification of n-BuOH and 85% aq. MeOH fractions led to the isolation of flavonoids 1-3. Among them, compound 1 exhibited excellent antioxidant effect in all bioassay systems tested. On the other hand, compounds 2 and 3 revealed potent inhibitory effect against $ONOO^-$ generated from SIN-1, comparable with the positive control penicillamine.

• Natural Product Sciences
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• 제29권1호
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• pp.1-9
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• 2023

This study assessed in vitro antioxidant activity (ABTS⁺ and DPPH) of Vitex rotundifolia seeds collected from two different regions in Korea (Jungjang City and Sindu City). Three extraction methods using ethanol, methanol, and water were prepared separately and subjected to quantification by reverse-phase high-performance liquid chromatography-photodiode array (HPLC-PDA) analysis as well as antioxidant testing. Among them, the water-based extract exhibited superior activity in the ABTS⁺ compared with the ethanol- and methanol-based extracts, while the DPPH assay analysis, revealed that the methanol-based extract had very low antioxidant activity. The concentrations of vanillic acid (1), luteolin (2), vitexicarpin (3), and artemetin (4) were quantified using HPLC-PDA analysis. Vanillic acid (1) was identified as the main antioxidant in V. rotundifolia seeds. Combining the antioxidant activity and quantitative analysis results, the water-based extract was considered to have the highest antioxidant activity. Furthermore, vanillic acid (1) was detected in the leaves and stems of V. rotundifolia plants from different regions, indicating that this species has the potential for use in future antioxidant-applications.

• Genomics & Informatics
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• 제21권1호
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• pp.4.1-4.18
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• 2023

Coronavirus disease 2019 (COVID-19) is an inflammatory and infectious disease caused by severe acute respiratory syndrome coronavirus 2 virus with a complex pathophysiology. While COVID-19 vaccines and boosters are available, treatment of the disease is primarily supportive and symptomatic. Several research have suggested the potential of herbal medicines as an adjunctive treatment for the disease. A popular herbal medicine approved in the Philippines for the treatment of acute respiratory disease is Vitex negundo L. In fact, the Department of Science and Technology of the Philippines has funded a clinical trial to establish its potential as an adjunctive treatment for COVID-19. Here, we utilized network pharmacology and molecular docking in determining pivotal targets of Vitex negundo compounds against COVID-19. The results showed that significant targets of Vitex negundo compounds in COVID-19 are CSB, SERPINE1, and PLG which code for cathepsin B, plasminogen activator inhibitor-1, and plasminogen, respectively. Molecular docking revealed that α-terpinyl acetate and geranyl acetate have good binding affinity in cathepsin B; 6,7,4-trimethoxyflavanone, 5,6,7,8,3',4',5'-heptamethoxyflavone, artemetin, demethylnobiletin, gardenin A, geranyl acetate in plasminogen; and 7,8,4-trimethoxyflavanone in plasminogen activator inhibitor-1. While the results are promising, these are bound to the limitations of computational methods and further experimentation are needed to completely establish the molecular mechanisms of Vitex negundo against COVID-19.