数字代谢活动测定可以快速评估二维材料的杀菌效率
Wenshuai Wu1, Simon Chun Kiat Goh1, Gaozhe Cai2
1School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
Analytica chimica acta
|December 6, 2023
概括
一种新的数字测定方法可以在数小时,而不是几天内快速识别和量化可行的大肠杆菌 (大肠杆菌). 这种方法使用微流体芯片检测β-d-葡萄糖酶 (GUS) 活性,以更快地进行诊断和安全测试.
科学领域:
- 微流体学 微流体学
- 生物技术是生物技术.
- 分析化学 分析化学
背景情况:
- 准确检测可活性的大肠杆菌 (大肠杆菌) 对于抗菌材料的开发,水质监测,食品安全和感染诊断至关重要.
- 传统的基于培养的E. coli检测方法耗时 (24小时) 和操作复杂,阻碍了快速评估.
- 需要更快的方法来评估抗微生物药物的有效性,检测污染,并指导立即的医疗治疗.
研究的目的:
- 开发一种快速的单细胞水平测定方法,用于识别和量化可活性的大肠杆菌.
- 为高效的细菌分析创建基于微流体芯片的系统.
- 为了证明该试验在评估抗微生物材料有效性和潜在的现场诊断方面的有用性.
主要方法:
- 开发一个数字β-d-glucuronidase (GUS) 测定方法,集成到自启动的聚甲基 (PDMS) 微流体芯片中.
- 在picoliter室中单个大肠杆菌细胞的分泌,以根据特定的GUS活性进行识别.
- 使用混合细菌培养方法验证试验的特异性,包括大肠杆菌,细菌,西格拉菌和Vibrio.
主要成果:
- 数字GUS测定成功地在3小时内识别了大肠杆菌,并在4小时内对各种亚型进行量化.
- 该方法表现出高特异性,区分大肠杆菌和其他常见细菌.
- 该试验有效地用于在暴露于抗菌材料后列出可活性的大肠杆菌,证实了其在评估抗菌效率方面的有用性.
- 脱气芯片可以在没有外部仪器的情况下自动分配样品.
结论:
- 数字GUS测定对单个大肠杆菌的识别和定量具有功能和实用性.
- 开发的微流体芯片及其密封包装显示出在现场进行大肠杆菌分析的潜力.
- 这项技术可用于诊断大肠杆菌感染,进行抗菌素敏感性测试和监测水中的便污染.
- 数字GUS测定提供了一种新的范式,通过检查代谢酶活性来检测可活性的细菌,超越大肠杆菌检测.
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