• 대한약침학회지
• /
• 제17권1호
• /
• pp.7-12
• /
• 2014

Objectives: The objective of this study is to investigate the effects of Salviae Miltiorrhizae Radix hot aqueous extract on nitric oxide (NO) and prostaglandin $E_2$ ($PGE_2$) production and on 1,1-diphenyl-2-picryl hydrazyl (DPPH) free-radical scavenging in macrophages. Methods: Salviae Miltiorrhizae Radix (300 g) was heated at $100^{\circ}C$ with distilled water (2 L) for 4 hours. The extract was filtered and concentrated to 100 mL by using a rotary evaporator, was frozen at $-80^{\circ}C$, and was then freeze-dried by using a freezing-drying system. The RAW 264.7 macrophage was subcultured by using $10-{\mu}g/mL$ lipopolysaccharide (LPS). In order to evaluate cytotoxicity, we performed 3-(4,5-dimrthylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays and measured the cell viability. The NO production was measured by using Griess assays, and the $PGE_2$ production was measured by using enzyme immunoassays. The antioxidant activity, the 1,1-diphenyl-2-picryl hydrazyl (DPPH) free-radical scavenging capability, was measured by using the DPPH method. Results: Cell viability with the 1-, 5-, 25-, 125- and $625-{\mu}g/mL$ Salviae Miltiorrhizae Radix hot aqueous extract was not significantly decreased compared to the cell viability without the extract. When 125 and $625{\mu}g/mL$ of Salviae Miltiorrhizae Radix hot aqueous extract were used, nitric oxide (NO) production in LPS-stimulated RAW 264.7 macrophages was significantly inhibited compared to that in the control group. When 25, 125, and $625{\mu}g/mL$ of Salviae Miltiorrhizae Radix hot aqueous extract were used, $PGE_2$ production in LPS-stimulated RAW 264.7 macrophages was significantly inhibited compared to that in the control group. The 125- and $625-{\mu}g/mL$ Salviae Miltiorrhizae Radix hot aqueous extracts had high DPPH free-radical scavenging capabilities in RAW 264.7 macrophages. Conclusion: This study indicates that Salviae Miltiorrhizae Radix hot aqueous extract suppresses NO and $PGE_2$ production and improves DPPH free-radical scavenging capability. Thus, it seems that Salviae Miltiorrhizae Radix hot aqueous extract may have an anti-inflammation effect and antioxidant activity.

• KSBB Journal
• /
• 제18권4호
• /
• pp.282-288
• /
• 2003

본 연구에서는 항염증 및 항산화 활성을 갖는 유용한 물질 을 검색하기 위해 40여 가지 생약재를 에탄올 추출하여 H HAase 억제 및 라디칼 소거 활성을 측정하였다 .. HAase 억제 활성을 측정한 결과, I mg/mL의 농도에서 황기, 두충, 오미 자, 황금, 오가피, 목과, 목단피, 산사가 50% 이상의 저해활 성을 나타내었고, 이들에 대하여 n-hexane, chloroform, ethyl a acetate, water로 순차적으로 용매분획하여 활성을 측정한 결 과, 모든 시료의 ethyl acetate와 water 분획에서 높은 활성을 보였다 항산화 활성은 DPPH 라디칼에 대한 전자공여능과 F Fenton 반응에 의해 발생한 hydroxyl radical에 대한 소거능으 로 평가하였다 .. DPPH 라디칼에 대한 전자공여능은 복분자, 목단피, 백작약, 차전자, 마가목 에탄올 추출물이 I mg{mL 놓도에서 90% 이상으로 대조군으로 이용한 BHA와 Q - -tocopherol과 유사한 활성을 나타내었다 .. 2-deoxyribose 산화 법에 따른 hydroxyl 라디칼 소거활성에서 대부분의 에탄올 추출물 시료에서 모두 높은 활성을 나타내었다. 활성올 갖는 시료에 대하여 지질과산화 억제 활성을 측정한 결과 linoleic a acid와 phosphatidylcholine liposome 기질 모두에 대하여 오미 자 추출물은 가장 높은 억제 활성을 나타내었다.

• 한국작물학회지
• /
• 제61권1호
• /
• pp.33-40
• /
• 2016

This study is focused on the evaluation of growth parameters, total polyphenol content (TPC), chlorophyll content as well as the DPPH (1,1-diphenyl-2-picryhydrazyl) free radical scavenging activity of young barley seedling (YBS) affected by elicitation. Salicylic acid (SA), methyl jasmonate (MJ), amino acid liquid fertilizer (ALF) and microbial metabolism activator (MMA) were used. Elicitation was conducted for two times and various concentrations were used in this study. The result revealed that, MJ 1 ml/L treated-YBS gave the longest seedling length of 1.33 cm, followed by the ones treated with SA 1.38 mg/L and ALF 2 ml/L, respectively. ALF 3 ml/L treatment gave the highest fresh weight of 10 seedlings, followed by MJ 5 ml/L and SA 13.8 mg/L treatment with 1.56 g, 1.55 g and 1.53 g respectively. SA 138.12 mg/L elicitor treated-YBS gave the highest Chl a, Chl b content of $8.57{\mu}g/mg$ and $3.83{\mu}g/mg$, respectively while the highest carotenoid content was found in MJ ml/L treatment with $1.62{\mu}g/mg$. Among elicitor treated-YBS, SA showed better TPC. The highest TPC was found in SA 1.38 mg/L treatment with 18.82 mg/g TAE. Likewise, SA 1.38 mg/L showed the highest DPPH free radical scavenging activity among all the treatments. However, the lowest TPC was found in ALF 1ml/L treated-YBS with 9.46 mg/g TAE, which was even lower than the control (14.31 mg/g TAE).

• 생명과학회지
• /
• 제17권12호
• /
• pp.1723-1728
• /
• 2007

본 연구에서는 다양한 기능성을 가지는 복분자를 80% methanol로 추출한 후 분획물들을 제조하여 항산화 효과 및 인간 유래 위암세포인 AGS와 KatoIII을 이용하여 성장 저해 효과와 DNA손상을 측정하였다. 항산화 효과를 측정해 보기 위하여 총 폴리페놀 함량과 플라보노이드 함량, DPPH free radical의 소거활성을 측정하였는데, 먼저 폴리페놀의 경우 butanol fr., ethylacetate fr., water fr.순으로 나타났고 특히 butanol fr.의 경우 $546.25{\mu}g/mg$의 매우 높은 폴리페놀 함량을 확인 할 수 있었다. 플라보노이드의 함량 결과 ethylacetate fr., butanol fr., water fr.,순으로 나타났으며 ethylacetate fr.의 경우 $141.78{\mu}g/mg$의 높은 플라보노이드 함량을 확인할 수 있었다. DPPH free radical의 소거활성에서는 폴리페놀 함량의 순서와 같은 효과를 보였으며, 합성 항산화제인 BHA의 $RC_{50}$값 $3{\mu}g/ml$보다 water fr.을 제외하고 더 좋은 소거능을 확인 할 수 있었다. 인간 유래 위암세포주의 성장 저해 효과를 살펴본 결과 AGS와 KatoIII 세포주 모두 butanol fr.에서 가장 좋은 저해능을 나타내었고, butanol fr., ethylacetate fr., water fr. 순서로 저해효과를 나타내었다. DNA손상을 측정한 결과 역시 이와 같은 순으로 나타났으며, butanol fr.에서 1시간 이내에 약 50%정도의 손상유도 효과를 보였다. 이상의 결과에서 복분자 methanol추출물과 각각의 분획물은 항산화 효과 및 위암 세포주에 대한 성장 저해 활성 및 높은 DNA손상 유도 효과를 갖고 있음을 알 수 있었다.

• 생명과학회지
• /
• 제21권5호
• /
• pp.746-752
• /
• 2011

측백나무 잎 및 열매 물, 에탄올 및 메탄올 추출물의 생리활성 물질(총 폴리페놀 화합물, 플라보노이드, 미네랄, 지방산 조성) 분석과 항산화 활성(DPPH free radical scavenging 활성, Cu/Fe-환원력, 간 조직 microsome 생체막 및 linoleic acid 과산화지질)을 측정하였다. 측백나무 잎의 메탄올 추출물에서 추출 수율(12.90%), 폴리페놀 화합물(16.02%) 및 플라보노이드(0.25%) 함량이 가장 높았다. 측백나무 잎 및 열매의 주요 미네랄은 Ca, K, 및 Mg이었다. 측백나무 잎의 주요 지방산은 palmitic acid 및 lauric acid였으며, 열매는 palmitic acid 및 decanoic acid가 높은 함량을 보였다. DPPH free radical scavenging 활성, Cu/Fe-환원력, 간 조직 microsome 생체막 및 linoleic acid의 과산화 지질 측정에 의한 항산화 활성은 측백나무 열매보다는 잎 추출물에서 높았으며, 시료 처리 농도 의존적으로 활성이 증가되는 것으로 나타났다. 이상의 실험 결과에서 측백나무 잎의 메탄올 추출물에서 높은 항산화 활성이 있었으며, 이는 폴리페놀 화합물과 플라보노이드와 같은 항산화 활성을 나타내는 생리활성 성분을 많이 함유하고 있는 것으로 나타나 향후 건강기능식품이나 화장품의 천연 항산화제 소재개발에 유용하게 사용될 것으로 사료된다.

• Natural Product Sciences
• /
• 제6권3호
• /
• pp.135-138
• /
• 2000

MeOH extract of Cuscuta chinensis seeds was fractionated with n-hexane, EtOAc and BuOH successively, and antioxidant activities were tested for all fractions using DPPH free radical scavenging method. In the tested fractions, EtOAc fraction showed high antioxidant activity$(EC_{50},\;50\;{\mu}g)$ From the EtOAc fraction, five compounds have been isolated. On the basis of spectral data, these compounds were identified as ${\beta}-sitosterol$, methyl 4-hydroxy-3,5-dimethoxycinnamate, ${\beta}-sitosterol-3-O-{\beta}-D-glucopyranoside$, caffeic acid, quercetin, kaempferol and calycopteretin. Among these compounds, ${\beta}-sitosterol$ and ${\beta}-sitosterol-3-O-{\beta}-D-glucopyranoside$ showed no antioxidant activity. $EC_{50}$ values of methyl 4-hydroxy-3,5-dimethoxycinnamate, caffeic acid, quercetin, kaempferol and calycopteretin were 0.6, 8, 19, 17 and $12\;{\mu}g$, respectively.

• 약학회지
• /
• 제56권5호
• /
• pp.320-325
• /
• 2012

To develop a new effective and safe natural antibiotics and antioxidant the essential oil was extracted from the roots of Anthriscus sylvestris by steam distillation. Its composition was analyzed by GC-MS. The activities of the essential oil fraction and its main components were evaluated against antibiotic-susceptible and -resistant strains of some food-born bacteria. In addition the synergism was examined with this oil combined with antibiotic by checkerboard titer test. The antioxidant activities were determined by in 1,1-diphenyl-2-picryl-hydrazil (DPPH) free radical scavenging activity test and reducing power assay. The essential oil fraction of A. sylvestris revealed significant inhibiting activities against antibiotic-susceptible and -resistant species of Vibrio and Shigella with MICs ranged from 1.00~4.00 mg/ml. It showed synergistic or additive effects when it was combined with amphicillin or trimethoprim/sulfamethoxazole (1 : 9). Additionally, the essential oil fraction of A. sylvestris exhibited significant DPPH free radical scavenging activity and the reducing power.

• 셀메드
• /
• 제5권2호
• /
• pp.14.1-14.6
• /
• 2015

Antioxidative and free radical scavenging properties of different stem extracts of Euphorbia trigona were evaluated and correlated with its total phenolic content. Aqueous, acetone and methanolic extracts of shade dried stem were obtained and were concentrated in vacuo. The antioxidant and free radical scavenging activities of stem extracts was determined by 2,2-Diphenyl-1-picrylhydrazyl (DPPH) scavenging assay, reducing power assay, deoxyribose degradation assay and $Fe^{2+}$ chelating assay. Total phenolic contents (TPC) were evaluated using Folin-Ciocalteu reagent. The results confirmed that the plant is a rich source of polyphenolic compounds which are invariably higher compared to other herbs. All extracts showed TPC in the range of 146.6 - 168.6 mg/g gallic acid equivalents at $300{\mu}g/ml$ of extract. Among the three extracts ME showed highest scavenging activity as evidenced by maximum scavenging of DPPH (83.2%), $OH{\bullet}$ radicals (94.81%), $Fe^{2+}$ chelating activity (88.59%) and a high reducing power 0.623 at $300{\mu}g/ml$. Our results demonstrate that Euphorbia trigona, an unexplored xerophytic plant could be potential source of natural antioxidants and phytotherapeutic agents. The plant possess invariably high amount of polyphenolic compounds with a broad spectrum of antioxidant properties and could be further used for food, feed and pharmaceutical applications.

• Preventive Nutrition and Food Science
• /
• 제15권1호
• /
• pp.30-35
• /
• 2010

The potential biological activities of methanol extract and 5 fractions (hexane, $CH_2Cl_2$, EtOAc, BuOH and water) from roots of Astragalus membranaceus were examined by 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging, hydroxyl radical (${\cdot}OH$) scavenging activity, reducing power assays, lipid peroxidation inhibitory activity, $\alpha$-amylase and $\alpha$-glucosidase inhibition assays. The EtOAc fraction showed high DPPH free radical scavenging activity ($EC_{50}=170.34\;{\mu}g/mL$), hydroxyl radical scavenging activity ($EC_{50}=32.14\;{\mu}g/mL$), lipid peroxidation inhibitory activity ($EC_{50}=52.46\;{\mu}g/mL$) and a concentration dependence, with OD value ranging from 0.234 to 0.345 (0.1 to 0.5 mg/mL), for reducing power. The EtOAc fraction has the highest total phenolic content ($142.13\;Gal\;{\mu}g/mg$) and the $CH_2Cl_2$ fraction has the highest flavonoid content ($71.63\;Que\;{\mu}g/mg$). Meanwhile, hexane and EtOAc showed certain $\alpha$-amylase and $\alpha$-glucosidase inhibition activities. These results suggest that the methanol extract and fractions from Astragalus membranaceus root have significant antioxidant and anti-diabetes activities, which could be used as a potential source of pharmaceutical materials.

• 한국식품과학회지
• /
• 제32권6호
• /
• pp.1409-1413
• /
• 2000

율무와 현율무의 total methanol 추출물과 분획 한 후의 각 획분에서의 DPPH 라디칼 소거작용 및 tyrosinase 저해작용을 검색 비교하여 그 함량-작용간의 dose-dependent한 결과를 얻었다. 라디칼 소거작용은 율무의 n-butanol 분획이 가장 활성이 높아 standard로 사용한 BHT의 6.7배 정도의 농도에서 같은 $IC_{50}$값을 나타내었으며 $600\;{\mu}g/ml$ 이상의 고농도에서는 BHT와 거의 동등한 저해율을 보였다. 그러나 현율무에서는 total methanol 추출물을 분획한 후의 모든 획분이 total methanole 추출물의 활성보다 작아 분획에 따른 작용의 편재화를 이루지 못했다. Tyrosinase 저해작용도 모든 분획이 거의 유사한 저해율을 보여 역시 분획에 따른 activity의 편재화가 이루어지지 않았음을 알 수 있었으나 현율무의 chloroform 분획이 비교적 높은 활성을 보여 $IC_{50}$값이 $321.5\;{\mu}g/ml$이었다. 이는 활성이 확인된 trans-p-coumaric acid의 $IC_{50}$값이 $25\;{\mu}g/ml$, Kazinol E의 $IC_{50}$값이 $111.3\;{\mu}g/ml$임을 참조 할 때 분획으로서는 좋은 활성을 보였음을 알 수 있었다.