The effect on the antioxidant activity and Nitric Oxide activity production inhibitory activity of Taraxacum has not been known. Therefore, phenolics and flavonoid contents were investigated from the ethanol extracts of five different Taraxacum species. The results showed that, among the five Taraxacum, T. hallaisanensis contains the highest total phenolic and flavonoid contents. When the antioxidant activity was measured by DPPH, ABTS+ and reducing power activity, the free radical scavenging activity of T. hallaisanensis was also the highest among five Taraxacum species. However, measurement by CCK-8 assay in Raw264.7 cells indicated that the extracts of Taraxacum species have no effect on cell viability. Moreover, we also investigated the effect of Taraxacum species on NO scavenging activity in lipopolysaccharide (LPS)-stimulated Raw264.7 cells. The results clearly showed that Taraxacum species inhibited NO production, and the inhibitory effect of T. hallaisanensis was the strongest. The above results suggested that Taraxacum species affected the antioxidant and NO scavenging activity, and among the five species, antioxidant and NO scavenging activity assay of T. hallaisanensis was significantly higher than those of other four Taraxacum species. Therefore, T. hallaisanensis could be used as a potential drug with anti-oxidant and anti-inflammatory effect.

This study was conducted to investigate the antimicrobial activities and antioxidant activities of the Korean mistletoe extract and its solvent fractions (e.g. n-hexane, ethyl ether, ethyl acetate, butanol). Ethyl ether fraction against Bacillus cereus showed stronger activities than benzoic acid (2.5 mg/mL). The MIC of korean mistletoe extract and slovent fractions were in the range of 6.25-25 mg/mL. The MIC (6.25 mg/mL) of ethyl acetate fraction onto Staphylocossus aureus was the lowest among them. Ethyl ether fraction which showed the strongest antioxidant activities by DPPH (1,1-diphenyl-2-picryl-hydrazyl) and FRAP (ferric ion reducing antioxidant power) methods had the highest total phenolic contents. It is suggested that Korean mistletoe could be utilized as natural preservative material through the study of the active compounds from ethyl ether fraction.

In this study, we investigated on antioxidative activity and nitric oxide production inhibitory activity of various solvent extracts of Lespedeza bicolor. The total polyphenol content of the methanol extract was 192.6 mg/g and flavonoid content of the acetone extract was 40.6 mg/g, as the highest content. In DPPH radical scavenging ability, SC50 values of the ethanol and methanol extract were exhibited 0.69mg/ml and 0.89mg/ml, respectively. However, in nitric oxide(NO) scavenging ability, SC50 values of the acetone was exhibited 0.72mg/ml as the highest activity. Moreover, the acetone extract showed strong NO production inhibitory effect in lipopolysaccharide(LPS)-stimulated Raw 264.7 cell. In the cytotoxicity measurement by MTT assay, the extracts were exhibited Raw 264.7 cell viabilities of 92.57~129.04% as nontoxic result in concentration of 65~650μg/ml. As a result, the acetone extract of L. bicolor could be applicable to functional materials for anti-inflammatory related fields.

참나물은 광범위하게 이용되는 식용산채임에도 불구하고 그 연구는 전 세계적으로 미미한 상태이다. 본 연구에서는 최근 고급 식용 산채로서 각광받고 있는 참나물의 메탄올 추출물을 조제하고, 이로부터 n-hexane, methylene chloride, ethylacetate 및 butanol을 이용하여 순차적 유기 용매 분획물과 물 잔류물을 조제하여 각각의 항산화, 항균 및 대장암세포 생육억제 활성을 평가하였다. 참나물 메탄올 추출물의 71.51%는

왕겨초액은 최근 목초액을 대신할 수 있는 소재로 많은 연구가 이루어지고 있다. 본 연구는 왕겨초액과 목초액의 항산화 활성을 비교하고, 왕겨초액과 홍삼 및 로즈마리 농축액과의 발효를 통한 시료의 항산화 활성을 비교하여 보았다. DPPH와 FRAP 활성 실험을 통해 항산화 활성을 알아본 결과, 왕겨초액의 항산화 활성은 목초액 보다는 다고 미흡하나, 로즈마리와의 동시 발효를 통해 왕겨초액의 항산화 활성을 높일 수 있으므로, 이취 제거로 인한 기능성 소

A variety of herbs and plants have been traditionally used in oriental folk medicine for the treatment of inflammatory diseases. In our attempt to search for anti-inflammatory agents from natural products, we investigated 64 methanol extracts from 42 medicinal plants belonging to 10 families which were evaluated for inhibitory activities of NO production in lipopolysaccharide (LPS)-stimulated macrophage RAW 264.7 cells. Among them, 16 extracts exhibited inhibitory activities of NO production (IC50 values ranging from 59.6 to 94.7 μg/ml). Only the extract from aerial parts of Hosta lancifolia (H. lancifolia) did not exert cytotoxic effects at the concentrations tested. The extract from H. lancifolia decreased the mRNA and protein levels of inducible nitric oxide synthase (iNOS) and pro-inflammatory cytokines in activated macrophage RAW 264.7 cells in dose-dependent manner. The results suggest that the extract may contain bioactive compounds that suppress expression of pro-inflammatory cytokines, which may prove beneficial with regard to the development of natural agents for prevention and treatment of inflammatory diseases.

최근 곤충자원은 약용 및 식용으로 활용하려고 많은 연구가 되고 있으며 미래의 자원으로 발전할 수 있는 가능성은 충분하다. 본 연구는 곤충자원 중 칠성무당벌레와 무당벌레를 이용하여 생물학적 활성과 함께 약용 및 식용으로의 활용가능성을 알아보고자 하였다. 생물학적 활성을 알아보기 위하여 이들 추출물을 이용하여 항산화관련 실험인 DPPH, FRAP, linoleic acid 산화 억제실험을 하였으며, 분자 염증에 관련된 유전자인 Cyclooxygena

바위솔의 추출물로부터 항산화 활성 및 동물 항암세포를 이용한 생물학적 특성을 조사 해 본 결과는 다음과 같다. 생육지별 DPPH 프리라디칼 소거 및 xanthine/xanthine oxidase 억제 활성비교에서 재배지에서 수확한 시료의 활성이 6.07(IC50:μg/ml)로 가장 높았다 생육시기별 DPPH 프리라디칼 소거 및 xanthine/xanthine oxidase 억제의 활성은 9월 수확물이 가장 활성이 높았다. 실리카겔 컬럼크로마토그래피를 이용한 항산화물질 분리결과에서 S-4 분획물의 DPPH와 xanthine oxidase 억제활성이 5.02(IC50 : μg/ml)와 6.18(IC50:μg/ml)을 나타냄으로써 높은 분리효율를 보였다. 항산화활성이 가장 높았던 LH-4 분획물의 주요화합물은 GC/MS에 의하여 지방산, 폴리페놀화합물 및 페놀유도체로 동정되었으며 alpha-androsta-7,14-diene과 1,2,3-benzenetriol이 주 물질이었다. POD 및 SOD 활성은 생육지간에 재배지, 산, 바닷가 순으로, 생육시기간에는 시기가 늦을수록 높게 나타났다 SOD 동위효소의 밴드수는 전 생육지, 전 생육시기에서 공히 2개의 밴드가 나타났으나, 그 세기는 재배지와 9월의 수확물이 가장 높은 활성을 나타내었다. 정제된 LH-4 분획물은 HL-60 세포의 종양증식을 억제시켰으며 종양유발유전자와 IPTG로 콜로니 형성을 유도한 암세포(2-12 cells)에서 분획물 400ppm 처리와 negative control 처리간의 colony형성은 유의차가 없었다.