抗菌素耐药性是一个全球性的健康问题,微生物对抗菌药物产生耐药性,使感染更难以治疗。这威胁到标准医学治疗的有效性,并需要紧急开发新的策略来对抗抗性微生物。研究越来越多地探索新的抗微生物剂的天然来源,这些抗微生物剂利用植物物种中发现的丰富多样性的化合物。这种追求有望发现对抗抗微生物耐药性的新型治疗方法。在这种情况下,化学成分,抗菌,巴豆镇精油的抗生物膜活性。叶(CuEO)进行了评估。CuEO通过加氢蒸馏提取,并通过气相色谱-质谱(GC/MS)对其化学成分进行了鉴定。通过微量稀释法在96孔板中评估了CuEO的抗菌活性,并测定最低抑菌浓度(MIC)和最低杀菌浓度(MBC)值。通过使用结晶紫染色和活细胞计数定量生物质来评估CuEO对生物膜形成的影响。此外,使用扫描电子显微镜(SEM)和激光共聚焦显微镜检查了用CuEO处理的生物膜的细胞形态变化。GC/MS分析鉴定出26种化合物,与elemicine(39.72%);桉树脑(19.03%),石竹烯(5.36%),和甲基丁香酚(4.12%)为主要化合物。在抗菌活性方面,CuEO显示对金黄色葡萄球菌ATCC700698、金黄色葡萄球菌ATCC25923、表皮葡萄球菌ATCC12228和大肠杆菌ATCC11303的抑菌效果,以及对金黄色葡萄球菌ATCC700698的杀菌活性。此外,CuEO显著抑制细菌生物膜的形成。显微镜分析表明,CuEO通过浸出细胞质内容物而破坏了细菌膜。因此,这项研究的结果表明,C.uricifolius的精油可能是一个有前途的天然替代品,用于预防细菌生物膜引起的感染。这项研究是首次报道C.uricifolius精油的抗生物膜活性。
Antimicrobial resistance is a global health issue, in which microorganisms develop resistance to antimicrobial drugs, making infections more difficult to treat. This threatens the effectiveness of standard medical treatments and necessitates the urgent development of new strategies to combat resistant microbes. Studies have increasingly explored natural sources of new antimicrobial agents that harness the rich diversity of compounds found in plant species. This pursuit holds promise for the discovery of novel treatments for combating antimicrobial resistance. In this context, the chemical composition, antibacterial, and antibiofilm activities of the essential oil from Croton urticifolius Lam. leaves (CuEO) were evaluated. CuEO was extracted via hydrodistillation, and its chemical constituents were identified via gas chromatography-mass spectrometry (GC/MS). The antibacterial activity of CuEO was evaluated in a 96-well plate via the microdilution method, and the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values were determined. The effect of CuEO on biofilm formation was assessed by quantifying the biomass using crystal violet staining and viable cell counting. In addition, alterations in the cellular morphology of biofilms treated with CuEO were examined using scanning electron microscopy (SEM) and laser confocal microscopy. GC/MS analysis identified 26 compounds, with elemicine (39.72%); eucalyptol (19.03%), E-caryophyllene (5.36%), and methyleugenol (4.12%) as the major compounds. In terms of antibacterial activity, CuEO showed bacteriostatic effects against Staphylococcus aureus ATCC 700698, S. aureus ATCC 25923, Staphylococcus epidermidis ATCC 12228, and Escherichia coli ATCC 11303, and bactericidal activity against S. aureus ATCC 700698. In addition, CuEO significantly inhibited bacterial biofilm formation. Microscopic analysis showed that CuEO damaged the bacterial membrane by leaching out the cytoplasmic content. Therefore, the results of this study show that the essential oil of C. urticifolius may be a promising natural alternative for preventing infections caused by bacterial biofilms. This study is the first to report the antibiofilm activity of C. urticifolius essential oil.