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갯완두(Lathyrus japonicus) 에탄올 추출물의 항산화 및 항염증 효능
오건우,오건우,박윤경,이명석,고석천,이정민,임미진,김경우,김현수,김지율,김철환,원정혜,이대성 (사)한국해양바이오학회 2023 한국해양바이오학회지 Vol.15 No.1
In the present study, the antioxidant and anti-inflammatory activities of ethanolic extracts from Lathyrus japonicus at concentrations of 50, 100, and 200 μg/mL were investigated in LPS-stimulated, RAW264.7 cells. Antioxidant properties were determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging assays and ferric reducing antioxidant power assay. In addition, the production of reactive oxygen species (ROS) was measured using the 2′,7′-dichlorofluorescein diacetate (DCFH-DA) probe by flow cytometry. To examine the anti-inflammatory activity of the extracts of L. japonicus, their effects on the levels of nitric oxide (NO); production of cytokines such as interleukin (IL)-1β, IL-10, and tumor necrosis factor-α (TNF-α); and the activities of enzymes such as inducible NOS (iNOS) and cyclooxygenase-2 (COX-2) were assessed. The IC50 values of the DPPH and ABTS radical scavenging assays were 476.09 ± 1.50 and 34.91 ± 0.37 μg/mL, respectively. In addition, L. japonicus extracts not only inhibited ROS production, but also the production of NO, IL-1β, and IL-10, and the activity of iNOS in a dose-dependent manner. In summary, the ethanolic extracts of L. japonicus could be used as a functional food additive and an anti-inflammatory agent owing to their antioxidant and anti-inflammatory activities
Biological activities and biomedical potential of sea cucumber (Stichopus japonicus): a review
오건우,고석천,이동희,허수진,정원교 한국수산과학회 2017 Fisheries and Aquatic Sciences Vol.20 No.4
Members of the phylum Echinodermata, commonly known as echinoderms, are exclusively marine invertebrates. Among the Echinodermata, sea cucumber belongs to the family Holothuroidea. The sea cucumber Stichopus (Apostichous) japonicus (Selenka) is an invertebrate animal inhabiting the coastal sea around Korean, Japan, China, and Russia. Sea cucumber has a significant commercial value, because it contains valuable nutrients such as vitamins and minerals. They possess a number of distinctive biologically and pharmacologically important compounds. In particular, the body wall of sea cucumber is a major edible part. It consists of peptide, collagen, gelatin, polysaccharide, and saponin, which possess several biological activities such as anti-cancer, anti-coagulation, anti-oxidation, and antiosteoclastogenesis. Furthermore, the regenerative capacity of sea cucumber makes it a medically important organism. This review presents the various biological activities and biomedical potential of sea cucumber S. japonicus.
해양무척추동물을 활용한 골 조직 재생용 바이오 메디컬 소재
오건우 ( Gun Woo Oh ),정원교 ( Won Kyo Jung ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.1
Tissue engineering is an emerging, innovative technology to improve or replace the biological functions of damaged tissues and organs. Scaffolds are important materials for tissue engineering as they support cell attachment, migration, and differentiation. Marine sponges naturally contain scaffolds formed by extracellular matrix proteins (collagen and sponging) and strengthened by a siliceous or calcium carbonate skeleton. Coral skeletons are also derived naturally formed by essential calcium carbonate in the form of aragonite, and are similar to human bone. In addition, collagen extracted from jellyfish is a biosafe alternative to bovine and porcine collagen and gained attention as a potential source for tissue engineering. Moreover, cuttlefish bone is an excellent calcium source and can be used to generate bio-synthetic calcium phosphate. It has become a natural candidate for biomimetic scaffolds. This review describes the use of natural products derived from marine invertebrates for applications in bone tissue engineering based on studies from 2008 to 2014.
고분자 전해질 연료전지 스택의 무인기 적용을 위한 진동 영향 평가
강준영,오건우,김민우,이정운,이승국 한국수소및신에너지학회 2018 한국수소 및 신에너지학회논문집 Vol.29 No.6
Recently, research is being conducted to use a fuel cell as a power source of unmanned aircraft. However, safety standards about applying fuel cells to unmanned aircraft are insufficient. In this paper, to improve the safety of the fuel cells for unmanned aircraft is experimentally studied. For this reason, standards for safety of fuel cells were analyzed. And influence of vibration among the evaluation items related to the safety of the fuel cell for unmanned aircraft was discussed. In order to, at constant intervals, vibration was applied to the fuel cell, then the performance was measured, the measurement items were gas tightness, polarization curve, frequency response analysis (FRA). A total of 220 hours was experimented at 20 hour intervals. the result of vibration test, gas leakage rate was a maximum of -0.04826 kPa/min and Polarization curve reached a maximum of 1.0103 times of the initial value, the charge transfer resistance reached a maximum of 1.0104 times of the initial value. This research indicate that performance of fuel cell is affected by vibration and this study is expected to contribute to the safety of fuel cell for unmanned aircraft.