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Shim, Kil Bo,Yoon, Na Young The Korean Society of Fisheries and Aquatic Scienc 2018 Fisheries and Aquatic Sciences Vol.21 No.11
Background: The aim of this study was to investigate the in vitro inhibitory effects of Fucofuroeckol-A isolated from Eisenia bicyclis against tyrosinase activity and 3-isobutyl-1-methylxanthine (IBMX)-induced melanin biosynthesis in B16F10 melanoma cells. Result: Among the ethanolic (EtOH) extract of E. bicyclis and its organic solvent fractions, the ethyl acetate (EtOAc) soluble fraction showed a noticeable inhibitory effect on mushroom tyrosinase with an $IC_{50}$ value of $37.6{\pm}0.1{\mu}g/mL$. Repeated column chromatography of the active EtOAc fraction resulted in the isolation of Fucofuroeckol-A. It evidenced more potent tyrosinase inhibitory effect with an $IC_{50}$ value of $11.4{\pm}1.4{\mu}M$ than arbutin ($IC_{50}=1076.6{\pm}44.3{\mu}M$), which was used as a positive control. Lineweaver-Burk plots suggest that Fucofuroeckol-A plays as a noncompetitive inhibitor against tyrosinase. Furthermore, we have evaluated the inhibitory effects of Fucofuroeckol-A on IBMX-induced melanin formation in B16F10 melanoma cells. Fucofuroeckol-A ($12.5-100{\mu}M$) exhibited a significant inhibition of melanin production in the melanoma cells. Conclusion: In the present study, we suggested that Fucofuroeckol-A might prove possibility as a novel inhibitor of melanin biosynthesis in cosmetic applications.
Methyl Methacrylate(Radiopaque Bone Cement)를 이용한 두개골 성형술의 임상적 연구
심영보,황형식,이종인,오세문,최선길,강성구 대한신경외과학회 1990 Journal of Korean neurosurgical society Vol.19 No.3
Cranioplasty has long been performed by many physicians with different materials from the prehistoric era. Among the materials, methyl methacrylate has been known to be the superior to any other substitutes since 1940s in biologic, chemical and physical characteristics and its availability. So the authors review 72 patients who underwent cranioplasty with methly methacrylate at out hospital from 1985 to 1989. The clinical analysis were as flollows : 1) There was male prefonderence and epidural hematomas, compound comminuted depressed fractures by traffic accidents or fall down injuries were the main cause of craniectomy. 2) The location of defects was mainly frontal and/or parietal area and average size of defects was 17㎠ in plain skull film measurements. 3) The cosmetic results were satisfactory. 4) Complication rate was 6% and there was no mortality.