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    λ§λ§‰μƒ‰μ†Œμƒν”Όμ„Έν¬μ£Όμ˜ μ‚°ν™”μŠ€νŠΈλ ˆμŠ€ 유발 λͺ¨λΈμ—μ„œ μ•„μŠ€μ½”λ₯΄λΈŒμ‚°κ³Ό μ•„μŠ€νƒ€μž”ν‹΄μ˜ ν•­μ‚°ν™”νš¨κ³Όμ— κ΄€ν•œ 연ꡬ

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    ν•™μœ„λ…Όλ¬Έ(석사)--μ„œμšΈλŒ€ν•™κ΅ λŒ€ν•™μ› :μ˜κ³ΌλŒ€ν•™ ν˜‘λ™κ³Όμ •μ€„κΈ°μ„Έν¬μƒλ¬Όν•™μ „κ³΅,2019. 8. μœ ν˜•κ³€.Purpose: This study is to research antioxidative effect of ascorbic acid (vitamin C) and astaxanthin on ARPE-19 cells within an oxidative stress model induced by endogenous (hydrogen peroxide) and exogenous (ultraviolet B) sources of reactive oxygen species (ROS). Methods: 0, 0.1, 0.2, 0.4, 0.6, 0.8mM of hydrogen peroxide and 0, 20, 40, 60, 80, 100mJ/cm2 of UVB were treated to ARPE-19 cells to find sublethal and lethal dose of each source. 3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay and 2β€²,7β€²-Dichlorodihydrofluorescein diacetate (DCFH-DA) assay were done to examine cell viability and intracellular reactive oxygen species level change. With the sublethal and lethal dose of each inducers, 0-750uM of ascorbic acid and 0-40uM of astaxanthin were treated to examine their antioxidative effect on the oxidative stress induced ARPE-19. Results: Ascorbic acid and astaxanthin had antioxidative effects on ARPE-19 cells by significantly increasing cell viability and reducing intracellular reactive oxygen species level after oxidative stress induction. 500uM ascorbic acid increased the cell viability 27% and 14% respectively for 0.2mM and 0.4mM hydrogen peroxide and 17% and 12% respectively for 20mJ/cm2 and 100mJ/cm2 of UVB. The increment was due to its antioxidative effect considering decreased intracellular ROS level. Astaxanthin also showed an antioxidative effect but extended time period of time was needed for it to act. 30 hours of culture with 90uM ascorbic acid and 20uM astaxanthin increased the cell viability from 75% to 129% when exposed to 0.2mM hydrogen peroxide. Conclusion: Our data suggest that hydrogen peroxide and UVB-induced oxidative stress model of ARPE-19 could be used to examine antioxidative effect of compounds of interest. Ascorbic acid and astaxanthin can be strong antioxidants and the mixture of the two compounds can have synergistic effect.λͺ©μ : κ³Όμ‚°ν™”μˆ˜μ†Œλ‘œ 세포 λ‚΄λΆ€μ—μ„œ λ°œμƒν•œ μ‚°ν™”μŠ€νŠΈλ ˆμŠ€λ₯Ό μž¬ν˜„ν•˜κ³  μ€‘νŒŒμž₯ μžμ™Έμ„ μœΌλ‘œ 세포 μ™ΈλΆ€μ˜ μ‚°ν™”μŠ€νŠΈλ ˆμŠ€λ₯Ό μž¬ν˜„ν•œ λͺ¨λΈμ„ μ‚¬μš©ν•˜μ—¬ μ•„μŠ€μ½”λ₯΄λΈŒμ‚°κ³Ό μ•„μŠ€νƒ€μž”ν‹΄μ΄ λ§λ§‰μƒ‰μ†Œμƒν”Όμ„Έν¬μ— ν•­μ‚°ν™” νš¨κ³Όκ°€ μžˆλŠ”μ§€ μ•Œμ•„λ³΄κ³ μž ν•˜μ˜€λ‹€. 방법: 0, 0.1, 0.2, 0.4, 0.6, 0.8mM의 λ†λ„μ˜ κ³Όμ‚°ν™”μˆ˜μ†Œμ™€ 0, 20, 40, 60, 80, 100mJ/cm2 μ„ΈκΈ°μ˜ μ€‘νŒŒμž₯ μžμ™Έμ„ μ„ μ²˜λ¦¬ν•˜μ—¬ μ„Έν¬μ˜ μƒμ‘΄μœ¨κ³Ό 세포 λ‚΄μ˜ ν™œμ„±μ‚°μ’…μ˜ 농도 λ³€ν™”λ₯Ό μΈ‘μ •ν•˜μ˜€λ‹€. μ„Έν¬μ˜ 생쑴λ₯ μ€ MTT assay, 세포 λ‚΄μ˜ ν™œμ„±μ‚°μ†Œμ’…μ˜ λ†λ„λŠ” DCFH-DA assayλ₯Ό ν†΅ν•΄μ„œ μΈ‘μ •ν•˜μ˜€λ‹€. 두 μ‚°ν™”μŠ€νŠΈλ ˆμŠ€ 유발인자의 μΉ˜μ‚¬λŸ‰, μ€€μΉ˜μ‚¬λŸ‰μ˜ μ‘°κ±΄μ—μ„œ 0-750uM λ†λ„μ˜ μ•„μŠ€μ½”λ₯΄λΈŒμ‚°κ³Ό 0-40uM λ†λ„μ˜ μ•„μŠ€νƒ€μž”ν‹΄μ„ μ²˜λ¦¬ν•˜κ³  μ„Έν¬μ˜ μƒμ‘΄μœ¨κ³Ό 세포내 ν™œμ„±μ‚°μ†Œμ’…μ˜ 농도 λ³€ν™”λ₯Ό μΈ‘μ •ν•˜μ˜€λ‹€. κ²°κ³Ό: μ•„μŠ€μ½”λ₯΄λΈŒμ‚°κ³Ό μ•„μŠ€νƒ€μž”ν‹΄μ„ μ²˜λ¦¬ν–ˆμ„ λ•Œ κ³Όμ‚°ν™”μˆ˜μ†Œμ™€ μ€‘νŒŒμž₯ μžμ™Έμ„ μœΌλ‘œ μΈν•œ μ„Έν¬μ˜ 손상이 μœ μ˜ν•˜κ²Œ κ°μ†Œν•˜μ˜€λ‹€. 0.2mM와 0.4mM의 κ³Όμ‚°ν™”μˆ˜μ†Œλ₯Ό μ²˜λ¦¬ν–ˆμ„ λ•Œ μ„Έν¬λŠ” 각각 80%, 69%의 μƒμ‘΄μœ¨μ„ λ³΄μ˜€λ‹€. 이 μ‘°κ±΄μ—μ„œ 500uM의 μ•„μŠ€μ½”λ₯΄λΈŒμ‚°μ„ μ²˜λ¦¬ν–ˆμ„ λ•Œ 각각의 μ‘°κ±΄μ—μ„œ μƒμ‘΄μœ¨μ΄ 27% 14% μ¦κ°€ν–ˆλ‹€. 20mJ/cm2, 40mJ/cm2 의 μ€‘νŒŒμž₯을 세포에 μ²˜λ¦¬ν–ˆμ„ λ•Œ 85%, 65%의 μƒμ‘΄μœ¨μ„ λ³΄μ˜€κ³  μ΄λŠ” 500uM λ†λ„μ˜ μ•„μŠ€μ½”λ₯΄λΈŒμ‚°μ„ μ²˜λ¦¬ν–ˆμ„ λ•Œ 각각 17%, 12% μ¦κ°€ν•˜μ˜€λ‹€. 각 μ‘°κ±΄μ—μ„œ 세포 λ‚΄λΆ€μ˜ ν™œμ„±μ‚°μ†Œμ’…μ˜ 농도가 κ°μ†Œν•œ 것을 ν† λŒ€λ‘œ 세포 μƒμ‘΄μœ¨μ˜ μ¦κ°€λŠ” μ•„μŠ€μ½”λ₯΄λΈŒμ‚°μ˜ ν•­μ‚°ν™” νš¨κ³Όμ— κΈ°μΈν•œ κ²ƒμœΌλ‘œ νŒλ‹¨λœλ‹€. μ•„μŠ€νƒ€μž”ν‹΄λ„ λ§ˆμ°¬κ°€μ§€λ‘œ ν•­μ‚°ν™” 효과λ₯Ό λ‚˜νƒ€λ‚΄μ–΄ μ„Έν¬μ˜ μƒμ‘΄μœ¨μ„ μ¦κ°€μ‹œμΌ°μ§€λ§Œ, μ•„μŠ€μ½”λ₯΄λΈŒμ‚°λ³΄λ‹€ κΈ΄ 처리 μ‹œκ°„μ΄ ν•„μš”ν–ˆλ‹€. 세포에 0.2mM의 κ³Όμ‚°ν™”μˆ˜μ†Œλ‘œ μ‚°ν™”μŠ€νŠΈλ ˆμŠ€λ₯Ό μœ λ°œν•˜κ³  90uM의 μ•„μŠ€μ½”λ₯΄λΈŒμ‚°κ³Ό 20uM의 μ•„μŠ€νƒ€μž”ν‹΄μ„ 30 μ‹œκ°„ λ™μ•ˆ 같이 μ²˜λ¦¬ν–ˆμ„ λ•Œ 각 μ•½λ¬Όμ˜ 단독 μ²˜λ¦¬λ³΄λ‹€ ν–₯μƒλœ 효과λ₯Ό 보이며 75%μ—μ„œ 129%둜 μ„Έν¬μ˜ μƒμ‘΄μœ¨μ„ μ¦κ°€μ‹œμΌ°λ‹€. κ²°λ‘ : κ³Όμ‚°ν™”μˆ˜μ†Œμ™€ μ€‘νŒŒμž₯ μžμ™Έμ„ μœΌλ‘œ μœ λ„λœ λ§λ§‰μƒ‰μ†Œμƒν”Όμ„Έν¬μ£Όμ˜ μ‚°ν™”μŠ€νŠΈλ ˆμŠ€ λͺ¨λΈμ΄ ν•­μ‚°ν™” 후보 물질의 효과λ₯Ό μ‹€ν—˜ν•˜λŠ”λ° νƒ€λ‹Ήν•œ 것을 λ°ν˜”λ‹€. μ•„μŠ€μ½”λ₯΄λΈŒμ‚°κ³Ό μ•„μŠ€νƒ€μž”ν‹΄μ΄ 이 λͺ¨λΈμ—μ„œ ν•­μ‚°ν™” 효과λ₯Ό λ‚˜νƒ€λƒˆκ³  μ•„μŠ€νƒ€μž”ν‹΄μ€ ν•­μ‚°ν™” 물질둜 μž‘μš©ν•˜λŠ”λ° μˆ˜μš©μ„± ν™˜κ²½μ—μ„œ μ•„μŠ€μ½”λ₯΄λΈŒμ‚°λ³΄λ‹€ κΈ΄ μ²˜λ¦¬μ‹œκ°„μ΄ ν•„μš”ν•œ 것을 λ°ν˜”κ³  μ•„μŠ€μ½”λ₯΄λΈŒμ‚°κ³Ό μ•„μŠ€νƒ€μž”ν‹΄μ„ ν˜Όν•©ν•˜μ—¬ μ²˜λ¦¬ν•˜λ©΄ 각 μ•½λ¬Όμ˜ λ‹¨λ…μ²˜λ¦¬λ³΄λ‹€ λ›°μ–΄λ‚œ ν•­μ‚°ν™” 효과λ₯Ό λ‚˜νƒ€λ‚΄λŠ” 것을 ν™•μΈν•˜μ˜€λ‹€.1. Introduction 1 2. Materials and methods 4 2.1 ARPE-19 cell culture 4 2.2 Hydrogen peroxide exposure procedure 4 2.3 Ultraviolet B irradiation procedure 5 2.4 DPPH ROS scavenging assay 5 2.5 Antioxidant treatment 6 2.6 MTT assay 6 2.7 Crystal violet assay 7 2.8 DCFH-DA intracellular ROS level assay 7 3. Results 9 4. Discussion 28 5. References 32Maste

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