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Esculetin Prevents the Induction of Matrix Metalloproteinase-1 by Hydrogen Peroxide in Skin Keratinocytes

Zhen AX, Piao MJ, Kang KA, Fernando P, Kang HK, Koh YS, Hyun JW

BACKGROUND: Reactive oxygen species (ROS) are involved in various cellular diseases. Excessive ROS can cause intracellular oxidative stress, resulting in a calcium imbalance and even aging. In this study, we...
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Niacinamide Protects Skin Cells from Oxidative Stress Induced by Particulate Matter

Zhen AX, Piao MJ, Kang KA, Madushan Fernando PDS, Kang HK, Koh YS, Yi JM, Hyun JW

Niacinamide (NIA) is a water-soluble vitamin that is widely used in the treatment of skin diseases. Moreover, NIA displays antioxidant effects and helps repair damaged DNA. Recent studies showed that...
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Shikonin Exerts Cytotoxic Effects in Human Colon Cancers by Inducing Apoptotic Cell Death via the Endoplasmic Reticulum and Mitochondria-Mediated Pathways

Han X, Kang KA, Piao MJ, Zhen AX, Hyun YJ, Kim HM, Ryu YS, Hyun JW

The apoptotic effects of shikonin (5,8-dihydroxy-2-[(1R)-1-hydroxy-4-methylpent-3-enyl]naphthalene-1,4-dione) on the human colon cancer cell line SNU-407 were investigated in this study. Shikonin showed dose-dependent cytotoxic activity against SNU-407 cells, with an estimated...
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Comparative Study of Autophagy in Oxaliplatin-Sensitive and Resistant SNU-C5 Colon Cancer Cells

Boo SJ, Piao MJ, Kang KA, Zhen AX, Fernando PDSM, Herath HMUL, Lee SJ, Song SE, Hyun JW

Few studies have evaluated the role of autophagy in the development of oxaliplatin (OXT) resistance in colon cancer cells. In this study, we compared the role of autophagy between SNU-C5...
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7,8-Dihydroxyflavone Protects High Glucose-Damaged Neuronal Cells against Oxidative Stress

Cho SJ, Kang KA, Piao MJ, Ryu YS, Fernando P, Zhen AX, Hyun YJ, Ahn MJ, Kang HK, Hyun JW

Oxidative stress is considered a major contributor in the pathogenesis of diabetic neuropathy and in diabetes complications, such as nephropathy and cardiovascular diseases. Diabetic neuropathy, which is the most frequent...
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Purpurogallin Protects Keratinocytes from Damage and Apoptosis Induced by Ultraviolet B Radiation and Particulate Matter 2.5

Zhen AX, Piao MJ, Hyun YJ, Kang KA, Ryu YS, Cho SJ, Kang HK, Koh YS, Ahn MJ, Kim TH, Hyun JW

Purpurogallin, a natural phenol obtained from oak nutgalls, has been shown to possess antioxidant, anticancer, and anti-inflammatory effects. Recently, in addition to ultraviolet B (UVB) radiation that induces cell apoptosis...
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