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지식채널

• 논문정보

  검색결과 15건

  논문정보 목록 - 제목, 내용, 저자, 저널명/발행자, 상세보기

  제목	내용	저자	저널명/발행자	상세보기
  Cell-free 시험법에서 가는갯능쟁이 메탄올추출물의 항 주름 및 피부미백 효능	The purpose of this study was to examine the inhibitory efficacy of Atriplex gmelinii methanol extract (AGME) against wrinkle formation and hyperpigmentation in a cell-free system. The total polyphenol and flavonoid contents of AGME were 268.7 tannic acid equivalent (TAE) mg/g and 247.5 rutin equivalent (RE) mg/g, respectively. At a concentration of 1,000 μg/mL, the electron-donating ability of AGME was 83.2% with an SC50 (50% scavenging concentration for free radicals) of 249.0 μg/mL. The IC50 (50% inhibitory concentration) of collagenase activity for AGME and ascorbic acid was over 1,000 μg/mL and 448.3 μg/mL, respectively. The IC50 of elastase activity for both AGME and ascorbic acid was over 1,000 μg/mL. The IC50 of mushroom tyrosinase activity for AGME and arbutin were less than 62.5 μg/mL and 175.3 μg/mL, respectively. The results of this study demonstrate that AGME has high antioxidant capacity as well anti-wrinkle and skin-whitening efficacies in a cell-free system.	전근영,김영철		상세보기
  Importance of Biotic and Soil Factors in Determining the Distribution Strategies of Coastal Salt Marsh Plants	The distribution of plant communities in the salt marshes of the southwestern coasts of South Korea was studied, along with environmental or plant factors, by canonical correspondence analysis (CCA) and the competitor (C), stress tolerator (S), and ruderal (R) (CSR) ecological strategies. The coastal salt-marsh plants were classified into three plant-factor groups in the CCA biplot diagram. Group 1 was correlated with LS and FP. Group 2 was correlated with CH and SLA, and Group 3 was correlated with LA, LDMC and LDW. The salt-marsh plants were classified into four soil-factor groups in the CCA biplot diagram. First, the group factor was correlated with TN, TOC, and Ca2+. Second, the group factor was distributed according to Mg2+, soil texture as Clay and Silt. Third, the group factor was distributed according to Salinity and Na+ content. Fourth, the group factor was distributed according to Sand content. To clarify the relative significance of competition, stress, and disturbance in the distribution process of plant communities, the CSR distribution model was adopted. The nine species showed CR (competitor-ruderal) strategies: Artemisia fukudo, Artemisia scoparis, Aster tripolium, Atriplex gmelinii, Imperata cylindrica var. koenigii, Salicornia europaea, Suaeda japonica, and Suaeda maritima. The four species with C (competitor) strategies were Artemisia capillaris, Limonium tetragonum, Triglochin maritimum, and Zoysia sinica. Carex scabrifolia and Phragmites communis displayed SC (stress-tolerant-competitor). Both distribution patterns of the CCA diagrams and CSR triangles may provide a useful scientific basis for protecting and restoring salt marshes and their valuable ecosystem services, considering the increasing disturbances.	Son, Dong-Ho,Lee, Jeom-Sook,Kim, Da Eun,Lee, Seung Ho,Hong, Sun-Kee,Myeong, Hyeon-Ho,Cho, Jang-Sam,Lee, Jae-Choon,Lee, Jae-Young,Seon, Hwi Joon,Kim, Jong-Wook	Shima Publishing	상세보기
  In vitro screening of elastase, collagenase, hyaluronidase, and tyrosinase inhibitory and antioxidant activities of 22 halophyte plant extracts for novel cosmeceuticals	Background: Halophyte plant (HPs), a salt-resistant flora, has been reported to provide several health benefits, but the knowledge of its cosmeceutical potential is still ambiguous. Here, 70% ethanol extracts of 22 HPs collected from along the coast of South Korea were investigated for their potentials of antioxidant, anti-aging, and whitening properties for use as materials in novel cosmeceuticals.Methods: Antioxidant activities were determined by DPPH (1,1-diphenyl-2-pricrylhydrazyl) free radical and hydrogen peroxide scavenging assays, and skin aging-related enzyme activities (anti-elastase, anti-collagenase, antihyaluronidase, and anti-tyrosinase) were evaluated by using the spectrophotometric method.Results: Among the 22 HPs, we found that Ischaemum antephoroides f. coreana and Atriplex gmelinii extracts presented the strongest scavenging effects against DPPH free radical and hydrogen peroxide, respectively. Our finding additionally suggested that Salicornia europaea extract might provide a major source of anti-elastase and anti-hyaluronidase; meanwhile, Rosa rugosa extract showed the highest anti-collagenase effect. Furthermore, the highest tyrosinase inhibitory activity was possessed by Spartina anglica extract.Conclusion: These findings may suggest that halophyte plants showing biological activities may be potent inhibitors of tyrosinase, elastase, collagenase, and hyaluronidase and could be useful for application in cosmeceuticals.	Chanipa Jiratchayamaethasakul,Yuling Ding,Ouibo Hwang,Seung-Tae Im,Yebin Jang,명승원,Jeong Min Lee,김현수,Seok-Chun Ko,이승홍	한국수산과학회	상세보기
  3,5-Dicaffeoyl-epi-quinic acid inhibits the PMA-stimulated activation and expression of MMP-9 but not MMP-2 via downregulation of MAPK pathway	Abstract Matrix metalloproteinases (MMPs), especially MMP-2 and MMP-9, are very important gelatinases that are overexpressed during tumor metastasis. Up to date, several MMP inhibitors have been developed from natural sources as well as organic synthesis. In the present study, the MMP-2 and MMP-9 inhibitory effects of 3,5-dicaffeoyl-epi-quinic acid (DCEQA), a caffeoylquinic acid derivative isolated from Atriplex gmelinii, were investigated in phorbol 12-myristate 13-acetate (PMA)-treated human HT1080 fibrosarcoma cells. Gelatin zymography and immunoblotting showed that DCEQA significantly inhibited the PMA-induced activation and expression of MMP-9 but was not able to show any effect against MMP-2. DCEQA treatment was also shown to upregulate the protein expression of tissue inhibitor of MMP-1 along with decreased MMP-9 protein levels. Moreover, the effect of DCEQA on phosphorylation of mitogen activated protein kinases (MAPKs), analyzed by immunoblotting, indicated the DCEQA inhibited the MMP-9 by downregulation of MAPK pathway. Collectively, current results suggested that DCEQA is a potent MMP-9 inhibitor and can be utilized as lead compound for treatment of pathological complications involving enhanced MMP activity such as cancer metastasis.	Lee, Jung Im,Kil, Jung-Ha,Yu, Ga Hyun,Karadeniz, Fatih,Oh, Jung Hwan,Seo, Youngwan,Kong, Chang-Suk	De Gruyter	상세보기
  Transformation and Expression of Na+/H+ Antiporter Vacuolar (AgNHX1) Gene in Potato (Solanum Tuberosum L.) Plants Under Salt Stress	Abstract Salinity is the main influencing factor in the productivity of most agricultural crops. Salinity has a negative effect on potato plants and yield. Previous research work shows that the transfer of the Na+/H+ antiporter gene to field crops improves the tolerance of plants to high salt concentrations. In this study, a vacuolar-type Na+/H+ antiporter gene from a halophytic plant, Atriplex gmelinii (AgNHX1) was transferred into potato via Agrobacterium. Leaf explants induced callus on Murashige & Skoog's (MS) medium accompanied by NAA (2.00 mg l-1) and BAP (0.25 mg l-1). The in-vitro leaf generated the callus which was transferred to the regeneration medium containing ZR (2.00 mg l-1) and NAA (0.25 mg l-1). The stable integration of the AgNHX1 gene in genetically modified potato plants was confirmed by PCR analysis. RT-PCR and northern blot hybridization indicated that AgNHX1expressed highly in transgenic potato plants. Our results indicated that the expression of AgNHX1 enhanced the salt tolerance in transgenic potato plants with good growth. This happened because, under salt stress, the accumulation of Na+ content and proline was more in shoots as compared to control. It showed that the expression of AgNHX1 activity in genetically modified potato plants was four-fold higher than in unmodified potato plants. Thus, it can be said that AgNHX1 gene expression could increase salt tolerance in potato plants.	soliman hemaid Ibrahim,Kadasa Naif M S		상세보기

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  유용한 해양생물 이야기 목록 - 학명, 국명, 생리활성, 원료등록, 특징/이용

  학명	국명	생리활성	원료등록	특징/이용
  Atriplex gmelinii	가는갯는쟁이	항산화