• 제목/요약/키워드: Inhibitory activity

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아위버섯 열수추출물 및 유기용매 분획물의 생리활성 효과 (Physiological Activities of Hot Water Extract and Solvent Fractions of Pleurotus ferulea)

  • 김준호
    • 한국균학회지
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    • 제39권3호
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    • pp.189-193
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    • 2011
  • 아위버섯으로부터 성인병 치료와 예방 관련된 생리활성물질을 확인하고 이 물질의 추출을 위한 최적 조건을 확립하기위해 아위버섯 열수추출물과 유기용매 분획물을 사용하여 성인병 관련 생리활성을 측정하였다. 아위버섯 열수추출액에서는 작은 항산화효과. 트롬빈저해효과, 혈당강하효과가 확인되었지만 혈전용해효과는 나타나지 않았다. 그러나 에틸아세테이트 분획물과 부탄올 분획물에서 86.79%와 87.82%의 높은 항산화효과가 확인 되었으며, 에틸아세테이트 분획물에서 0.08 plasmin unit의 작은 혈전용해활성을 확인할 수 있었다. 클로로포름 분획물과 에틸아세테이트 분획물에서 74.90%와 71.88%의 높은 트롬빈저해효과와 함께 부탄올 분획물에서 49.67%의 혈당강하효과를 확인하였다. 따라서 아위버섯의 에틸아세테이트 분획물과 부탄올 분획물은 혈관계 질환을 위한 기능성 식품의 개발에 이용할 수 있을 것으로 판단된다.

Inhibitory Activity of Flavonoids from Prunus davidiana and Other Flavonoids on Total ROS and Hydroxyl Radical Generation

  • Jung, Hyun-Ah;Jung, Mee-Jung;Kim, Ji-Young;Chung, Hae-Young;Choi, Jae-Sue
    • Archives of Pharmacal Research
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    • 제26권10호
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    • pp.809-815
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    • 2003
  • Since reactive oxygen species (ROS) and hydroxyl radicals ($^-OH$) play an important role in the pathogenesis of many human degenerative diseases, much attention has focused on the development of safe and effective antioxidants. Preliminary experiments have revealed that the methanol (MeOH) extract of the stem of Prunus davidiana exerts inhibitory/scavenging activities on 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radicals, total ROS and peroxynitrites ($ONOO^-$). In the present study, the antioxidant activities of this MeOH extract and the organic solvent-soluble fractions, dichloromethane (CH$_2$Cl$_2$), ethyl acetate (EtOAc), and n-butanol (n-BuOH), and the water layer of P. davidiana stem were evaluated for the potential to inhibit $^-OH$ and total ROS generation in kidney homogenates using 2',7'-dichlorodihydrofluorescein diacetate (DCHF-DA), and for the potential to scavenge authentic $ONOO^-$. We also evaluated the inhibitory activity of seven flavonoids isolated from P. davidiana stem, kaempferol, kaempferol 7-Ο-$\beta$-D-glucoside, (+)-catechin, dihydrokaempferol, hesperetin 5-Ο-$\beta$-D-glucoside, naringenin and its 7-Ο-$\beta$-D-glucoside, on the total ROS, $^-OH$ and $ONOO^-$ systems. For the further elucidation of the structure-inhibitory activity relationship of flavonoids on total ROS and 'OH generation, we measured the antioxidant activity of sixteen flavonoids available, including three active flavonoids isolated from P. davidiana, on the total ROS and 'OH systems. We found that the inhibitory activity on total ROS generation increases in strength with more numerous hydroxyl groups on their structures. Also, the presence of an ortho-hydroxyl group, whether on the Aring or S-ring, and a 3-hydroxyl group on the C-ring increased the inhibitory activity on both total ROS and $^-OH$ generation.

능이버섯의 항고혈압 활성과 항통풍 활성 (Antihypertensive Activity and Anti-gout Activity of Mushroom Sarcodon aspratus)

  • 강민구;;이종석;서건식;이종수
    • 한국균학회지
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    • 제39권1호
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    • pp.53-56
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    • 2011
  • 야생 능이버섯에 함유되어 있는 생리 기능성 물질들을 탐색, 분리하여 이들을 고부가가치의 건강식품 소재로 활용하고자 덕유산 일대에서 채집한 능이버섯의 물 추출물은 제조하여 몇 가지 생리 기능성을 측정하였다. 능이버섯 자실체의 물 추출물은 항고혈압성 엔지오텐신 전환효소(ACE) 저해 활성과 항통풍성 xanthine 산화효소(XOD) 저해활성이 각각 74.3%와 59.6%로 우수하였다. 그러나 tyrosinase 저해 활성과 항산화 활성, SOD 유사활성 등은 매우 낮거나 없었다. 능이버섯 자실체중의 ACE 저해활성은 자실체 분말의 물현탁액을 $30^{\circ}C$에서 24시간, XOD 저해물질은 $50^{\circ}C$에서 24시간 진탕 시켰을 때 가장 높았다. 이들 두 가지 생리활성 물질을 함유한 능이버섯 물 추출물은 앞으로 건강식품이나 대체 의약 소재 개발에 매우 유용하게 활용 할 것으로 사료된다.

2단 가수분해에 의한 굴 가수분해물의 기능성 개선 (Improving the Functional Properties of Oyster Hydrolysates by Two-step Enzymatic Hydrolysis)

  • 정인권;김진수;허민수
    • 한국수산과학회지
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    • 제39권3호
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    • pp.269-277
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    • 2006
  • This study prepared functional oyster hydrolysates using two-step enzymatic hydrolysis and investigated their functional properties. To prepare two-step enzymatic hydrolysates (TSEH), oysters were hydrolyzed using 1% Protamex (PR) at $40^{\circ}C$ and pH 6.0 for 1 hr before sequential treatment with one of the following enzymes for 1 hr: Alcalase (AL), Flavourzyme (FL), Neutrase (NE), pepsin (PE), and trypsin (TR). The PRAL, PRNE and PRTR hydrolysates had significantly greater angiotensin I converting enzyme (ACE) inhibitory activity than did PR and the other TSEHs. Only the antioxidant activity of the PRNE hydrolysate was significantly different (p<0.05), while none of the TSEHs had antimicrobial activity. The oyster hydrolysate prepared by sequential treatment with Protamex and Neutrase (PRNE) had the best ACE inhibitory activity and antioxidant activity, with $IC_{50}$ values of 0.40 and 0.94 mg/mL, respectively. The PRNE hydrolysate was processed through an ultrafiltration (UF) series with molecular weight cut-off (MWCO) membranes of 3, 5, 10, and 30 kDa, and the ACE inhibitory, antioxidant, and antimicrobial activities of the permeates were determined. The permeate through the 3-kDa MWCO membrane had greater ACE inhibitory activity and antioxidant activity than did the other PRNE permeates, with $IC_{50}$ values of 0.11 and 0.40 mg/mL, respectively.

Inhibitory Effect of Methanol Extract of Magnolia officinalis on Matrix Metalloproteinase-2

  • Lee, Dong-Yup;Kim, Cheorl-Ho;Kim, Dong-Soo
    • Preventive Nutrition and Food Science
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    • 제11권3호
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    • pp.191-197
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    • 2006
  • Matrix metalloproteinase-2 (MMP-2) is a key enzyme involved in tumor invasiveness. The plant of Magnolia officinalis Rehd. et Wils. is often included as an ingredient in various herbal remedies recommended for cancer theraphies in Korea. Various extracts prepared from stems of M. officinalis were tested for cytotoxic activity on human hepatocellular carcinoma cell line, SK-Hep cells using the XTT assay method. Then, the inhibitory effect was examined on MMP-2 activity using gelatin zymography. Methanol (MeOH) extract of M. officinalis caused the strongest inhibition of the MMP-2 activity, as measured by gelatin zymography method for enzyme activity. $IC_{50}$ values of fractions on MMP-2 activity were in a range of $4.9{\sim}11.3\;{\mu}g/mL$. Among each fraction, butanol and ethylacetate (EtOAc) fractions showed the strong inhibitory activities ($IC_{50}=10.7\;and\;4.9\;{\mu}g/mL$, respectively). When the M. officinalis's constituents such as magnolol, honokiol, (-)-epigallocatechin gallate (EGCG) and ovovatol were examined for inhibitory effects on MMP-2 activity, EGCG showed strong inhibitory activity. However, MeOH extract of M. officinalis was dose-dependently inhibited to MMP-2 activity. The MeOH extract, hexane and EtOAc fractions $(IC_{50}\;of\;>200\;{\mu}g/mL)$ exhibited weak cytotoxicity activity, while butanol $(IC_{50}=80\;{\mu}g/mL)$ and chloroform fractions $(IC_{50}=90\;{\mu}g/mL)$ exhibited relatively strong cytotoxic activity. From these results, M. officinalis could be suitable for cancer treatment and chemopreventive drugs.

탄닌화합물의 Tyrosinase 억제 활성 (Inhibitory Effects of Tannins on Tyrosinase Activity)

  • 조수민;김지헌;이민원
    • 생약학회지
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    • 제32권1호통권124호
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    • pp.68-71
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    • 2001
  • For the use of tannins in the whitening-effect cosmetics, inhibitory effect against tyrosinase activity was determined. Three condensed tannins including gallocatechin, gallocatechin 3',4'-di-O-gallate and epicatechin 3-O-gallate and three hydrolyzable tannins, 1,2,6-tri-O-galloyl-${\beta}$-D-glucose, 2,3-(S)-HHDP-D-glucose and pedunculagin showed 15-29% mild inhibitory effects against tyrosinase activity.

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Revision of Structures of Flavanoids from Scutellaria indica and Their Protein Tyrosine Phosphatase 1B Inhibitory Activity

  • Min, Byung-Sun
    • Natural Product Sciences
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    • 제12권4호
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    • pp.205-209
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    • 2006
  • The structures of flavonoids, 2(S)-5,7-dihydroxy-8,2'-dimethoxyflavanone (1), wogonin (2), 2(S)-5,7, 2'-trihydroxy-8-methoxyflavanone (3), and 2(S)-5,2',5'-trihydroxy-7,8-dimethoxyflavanone (4), isolated from Scutellaria indica were revised on the basis of 2D NMR spectroscopy, including to gCOSY, gHSQC, and gHMBC. Compounds 1-4 were tested in vitro protein tyrosine phosphatase 1B (PTP1B) inhibitory activity. Compounds 2 and 4 exhibited weak PTP1B inhibitory activity with $IC_{50}$ values of 208 and $337{\mu}M$, respectively.

생약의 파골 세포 분화 저해활성 검색 (Inhibitory Activity of Medicinal Plants against Differentiation of Osteoclasts)

  • 이준원
    • 생약학회지
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    • 제40권2호
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    • pp.83-88
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    • 2009
  • Bone is continuously remodeled by osteoblasts and osteoclasts. Osteoclasts play an important role in bone metabolism by resorbing the bone matrix. Thus, the compounds inhibiting osteoclasts can improve bone diseases such as osteoporosis. The methanol extracts of 159 herbal medicines were screened for the inhibitory activity against differentiation of osteoclasts. Among the tested extracts, Achuranthis Radix and Corydalis Tuber showed relatively strong inhibitory activity against differentiation of osteoclasts, whereas they have no significant effect on proliferation of osteoclasts.

Tyrosinase Inhibitory Prenylated Flavonoids from Sophora flavescens

  • Kim, Soo-Jin;Son, Kun-Ho;Chang, Hyun-Wook;Kang, Sam-Sik;Kim, Hyun-Pyo
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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    • pp.151.2-151.2
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    • 2003
  • For the purpose of the development of a skin-whitening agent, Sophora flavescens was evaluated for tyrosinase inhibitory activity and its active principles were identified followed activity-guided isolation. The ethanol extract and dichloromethane fraction from S. flavescens showed significant inhibition of mushroom tyrosinase. From the dichloromethane fraction, three known prenylated flavonoids, sophoraflavanone G, kuraridin, and kurarinone, were isolated. Compared with kojic acid ($IC_50$=20.5 $\mu$M), these compounds possessed more potent tyrosinase inhibitory activity. (omitted)

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감꼭지의 Tyrosinase와 Elastase 저해 활성 성분 (Ingredients of Tyrosinase and Elastase Inhibitory Activity from Calyx of Diospyros kaki Thunberg)

  • 차배천;이은희
    • 생약학회지
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    • 제44권2호
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    • pp.182-187
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    • 2013
  • This study was conducted to investigate glutathione S-transferase(GST) activity, tyrosinase inhibitory effect and elastase inhibitory effect in persimmon calyx(calyx of Diospyros kaki Thunberg) for screening of functional materials from natural products. As a result, EtOAc extract of persimmon calyx turned out to be having tyrosinase inhibitory effect and elastase inhibitory effect. The active constituents of tyrosinase and elastase inhibitory effect were isolated from EtOAc extract of persimmon calyx. Their structure of compounds were identified as ursolic acid and (-)-daucosterol by spectroscopic evidence, respectively.