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探索Citronella对Listeria monocytogenes的抑制机制及其在奶酪保存中的利用
Kun Kang1, Xingsai Liu1, Peiyuan Li1
1School of Biological Engineering, Henan University of Technology, 100 Lianhua Street, Zhengzhou, Henan, 450001, People's Republic of China.
Food microbiology
|June 5, 2024
概括
甲 (CIT) 有效地抑制了Listeria monocytogenes生物膜的形成,并降低了细菌的活性. 这种天然化合物显示出控制食品污染和加强食品安全措施的前景.
科学领域:
- 食品微生物学 食品微生物学
- 自然产品化学 自然产品化学
- 细菌病原体的产生
背景情况:
- 李斯特菌 (Listeria monocytogenes) 是一种主要的食源性病原体,以其耐药性和形成生物膜的能力而闻名.
- 由L. monocytogenes形成的生物膜导致持续的污染,并对人类健康构成重大风险.
- 控制L. monocytogenes污染对于确保食品安全至关重要.
研究的目的:
- 为了评估甲 (CIT) 对Listeria monocytogenes的抑制作用.
- 研究CIT抑制L. monocytogenes生长和生物膜形成的机制.
- 评估CIT作为对L. monocytogenes的食品安全剂的潜力.
主要方法:
- 确定CIT的最小抑制度 (MIC) 和最小杀菌度 (MBC).
- 使用水晶紫色染色和MTT测定评估生物膜抑制.
- 对细菌运动性,细胞结构 (SEM,LSCM) 和核酸完整性的评估影响.
- 进行蛋白质组分析并测量ATPase活性和ATP含量.
- 通过在4°C的化对奶酪进行试验,测试了CIT的有效性.
主要成果:
- 在2μL/mL时,CIT表现出对L. monocytogenes的抑制和杀菌活性.
- CIT显著抑制了生物膜的形成,降低了代谢活动,并抑制了细菌的运动性.
- 显微镜检测显示了对细菌细胞结构和生物膜完整性的有害影响,核酸受损.
- 蛋白质组分析表明,CIT会影响参与新陈代谢,DNA复制/修复,转录和生物膜形成的蛋白质.
- 在L. monocytogenes中,CIT治疗显著降低了ATPase活性和ATP含量.
- 在冷藏条件下,CIT有效地抑制了奶酪上的L. monocytogenes.
结论:
- 甲是一种强大的Listeria monocytogenes抑制剂,向包括生物膜形成和代谢活动在内的多个细胞过程.
- CIT对细菌细胞结构和完整性表现出显著的有害影响.
- 这些发现支持甲作为天然抗微生物剂的潜在应用,用于食品安全控制,特别是针对L. monocytogenes污染.
- 对于控制乳酪等食品上的L. monocytogenes,CIT显示出有希望的结果.
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