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Analysis of the Active Constituents and Evaluation of the Biological Effects of Quercus acuta Thunb. (Fagaceae) Extracts

机译:栎类活性成分的分析和生物学效应评估。 (菊科)提取物

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摘要

We evaluated the antioxidant and antibacterial activity of hexnane, ethyl acetate, acetone, methanol, ethanol, and water extracts of the Quercus acuta leaf. The antioxidant properties were evaluated by 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity, reducing power, and total phenolic content. Antibacterial activity was assessed against general infectious pathogens, including antibiotic-resistant clinical isolates. The methanolic extract showed the highest DPPH radical scavenging activity and total phenolic content, while the reducing power was the highest in the water extract. The ethyl acetate extract showed the best antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA) strains. Additionally, it displayed antibacterial activity against Staphylococcus aureus KCTC1928, Micrococcus luteus ATCC 9341, Salmonella typhimurium KCTC 1925, Escherichia coli KCTC 1923, and eight MRSA strains. These results present basic information for the possible uses of the ethanolic and ethyl acetate extracts from Q. acuta leaf in the treatment of diseases that are caused by oxidative imbalance and antibiotic-resistant bacterial infections. Six active compounds, including vitamin E, which are known to possess antioxidant and antibacterial activity, were identified from the extracts. To the best of our knowledge, this is the first study that reports the chemical profiling and antibacterial effects of the various QA leaf extracts, suggesting their potential use in food therapy or alternative medicine.
机译:我们评估了六cut栎叶的己烷,乙酸乙酯,丙酮,甲醇,乙醇和水提取物的抗氧化和抗菌活性。通过1,1-二苯基-2-吡啶并肼基(DPPH)的自由基清除活性,还原能力和总酚含量评估抗氧化剂的性能。评估了针对一般传染性病原体(包括抗药性临床分离株)的抗菌活性。甲醇提取物表现出最高的DPPH自由基清除活性和总酚含量,而还原力在水提取物中最高。乙酸乙酯提取物对耐甲氧西林的金黄色葡萄球菌(MRSA)菌株表现出最佳的抗菌活性。此外,它还显示出对金黄色葡萄球菌KCTC1928,黄褐微球菌ATCC 9341,鼠伤寒沙门氏菌KCTC 1925,大肠杆菌KCTC 1923和八种MRSA菌株的抗菌活性。这些结果提供了关于从cut鱼叶片中提取乙醇和乙酸乙酯的可能用途的基本信息,这些疾病可用于治疗由氧化不平衡和抗药性细菌感染引起的疾病。从提取物中鉴定出六种活性化合物,包括已知具有抗氧化和抗菌活性的维生素E。据我们所知,这是第一项报道各种QA叶提取物的化学分析和抗菌作用的研究,表明它们在食品疗法或替代药物中的潜在用途。

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