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Molecules. 2011 Jul 6;16(7):5735-52. doi: 10.3390/molecules16075735.
2
Lung tumorigenesis suppressing effects of a commercial kava extract and its selected compounds in A/J mice.商业卡瓦提取物及其选定化合物对 A/J 小鼠肺肿瘤发生的抑制作用。
Am J Chin Med. 2011;39(4):727-42. doi: 10.1142/S0192415X11009202.
3
Efficacy and safety of orally administered Lentinula edodes mycelia extract for patients undergoing cancer chemotherapy: a pilot study.口服香菇菌丝体提取物对癌症化疗患者的疗效和安全性：一项初步研究。
Am J Chin Med. 2011;39(3):451-9. doi: 10.1142/S0192415X11008956.
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Nitroxides and a nitroxide-based UV filter have the potential to photoprotect UVA-irradiated human skin fibroblasts against oxidative damage.氮氧自由基和一种基于氮氧自由基的紫外线过滤剂有可能保护经 UVA 辐射的人类皮肤成纤维细胞免受氧化损伤。
J Dermatol Sci. 2011 Jul;63(1):55-61. doi: 10.1016/j.jdermsci.2011.03.008. Epub 2011 Apr 7.
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8-hydroxy-2' -deoxyguanosine (8-OHdG): A critical biomarker of oxidative stress and carcinogenesis.8-羟基-2'-脱氧鸟苷（8-OHdG）：氧化应激和致癌作用的关键生物标志物。
J Environ Sci Health C Environ Carcinog Ecotoxicol Rev. 2009 Apr;27(2):120-39. doi: 10.1080/10590500902885684.
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Quality assurance and safety of herbal dietary supplements.草药膳食补充剂的质量保证与安全性
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Multiplexing of optical fiber gas sensors with a frequency-modulated continuous-wave technique.采用调频连续波技术的光纤气体传感器复用
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Electron spin resonance estimation of hydroxyl radical scavenging capacity for lipophilic antioxidants.亲脂性抗氧化剂清除羟基自由基能力的电子自旋共振估计
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卡瓦胡椒的光毒性——活性氧的形成导致脂质过氧化和 DNA 损伤。

Phototoxicity of kava - formation of reactive oxygen species leading to lipid peroxidation and DNA damage.

机构信息

National Center for Toxicological Research, US Food and Drug Administration, Jefferson, AR 72079, USA.

出版信息

Am J Chin Med. 2012;40(6):1271-88. doi: 10.1142/S0192415X12500942.

DOI:10.1142/S0192415X12500942
PMID:23227797
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5743056/
Abstract

Kava is one of the most widely sold herbal dietary supplements in the United States. It has been reported that, besides exhibiting hepatotoxicity, kava also possesses photosensitivity and induces dermopathy in humans. In this study, we determined that UVA irradiation of kava in the presence of a lipid, methyl linoleate, generated lipid peroxidation which was mediated by singlet oxygen generated during photoirradiation. The six major kavalactones(yangonin, 7,8-dihydrokawa in, kawain, 7,8-dihydromethysticin, methysticin, and 5,6-dehydrokawain) were also studied in parallel; only 5,6-dehydrokawain and yangonin-induced a low level of lipid peroxidation. UVA irradiation of kava in human HaCaT skin keratinocytes induced cytotoxicity which was mediated by oxidative stress, led to DNA strand cleavage, and produced 8-hydroxy-2'-deoxyguanosine (8-OHdG) adduct. Study by the electron spin resonance (ESR) method revealed that UVA irradiation of kava produced singlet oxygen and carbon-centered radicals. The overall results suggest that kava is photocytotoxic and photogenotoxic, both mediated by free radicals generated during photoirradiation.

摘要

卡瓦是美国最广泛销售的草药膳食补充剂之一。据报道，除了表现出肝毒性外，卡瓦还具有光敏性，并在人类中引起皮肤病。在这项研究中，我们确定在存在脂质（甲基亚油酸）的情况下，UVA 辐射卡瓦会产生脂质过氧化，这是由光辐射期间产生的单线态氧介导的。同时还平行研究了六种主要的卡瓦内酯（延胡索乙素、7,8-二氢卡瓦因、卡瓦因、7,8-二氢甲氧基紫檀素、甲氧基紫檀素和 5,6-去氢卡瓦因）；只有 5,6-去氢卡瓦因和延胡索乙素诱导低水平的脂质过氧化。UVA 辐射卡瓦在人 HaCaT 皮肤角质形成细胞中诱导细胞毒性，这是由氧化应激介导的，导致 DNA 链断裂，并产生 8-羟基-2'-脱氧鸟苷（8-OHdG）加合物。电子自旋共振（ESR）方法的研究表明，UVA 辐射卡瓦产生了单线态氧和碳中心自由基。总体结果表明，卡瓦具有光细胞毒性和光遗传毒性，两者均由光辐射期间产生的自由基介导。