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文獻回顧:兒茶素光化學研究

Mini Review: The Photochemistry of Catechin

摘要


兒茶素是黃烷醇類化合物,含四個酚基,具一系列生理上的特性。本文回顧討論兒茶素在鹼性環境下,對不同光質的影響。尤其是兒茶素經光反應的過程中,產生自由基及聚合物的機制。兒茶素溶液呈現透明,在鹼性環境下,照藍光轉為黃色,經分離及鑑定是二聚體兒茶素化合物,屬原花青素類的物質。兒茶素光反應時,添加抗壞血酸或沒食子酸,能降低二聚體的形成,表示抗壞血酸或沒食子酸能抑制兒茶素的光敏氧化作用。兒茶素在鹼性環境下照藍光,經光敏氧化作用,產生超氧陰離子自由基,可造成鮑氏不動桿菌及其多重抗藥菌株的失活。

關鍵字

抗壞血酸 藍光 兒茶素 失活

並列摘要


The influences of blue light on the inactivation of pathogenic microorganisms with catechin photoreaction were discussed in this study. Blue light could be thought a new light origin for catechin photolysis. Chromatographic assay showed that the yellowish catechin dimer was produced from the electron transfer of catechin photolysis in an alkaline solution condition. Catechin upon addition of ascorbic acid or gallic acid can suppress the photolysis for ROS formation and inhibit the catechin photolysis. The catechin photolysis with blue light was able to inactivate Acinetobacter baumannii, including a carbapenem-resistant strain by ROS formation. Catechin photochemistry might be a safe and simple technique for hygienic decontamination.

並列關鍵字

ascorbic acid blue light catechin inactivation

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