电子选择可行的军团菌细胞的视频为基础,可量化的电泳法。

IF 3.3 4区 医学 Q3 ENGINEERING, BIOMEDICAL
Madeline Altmann, Anders Henriksson, Peter Neubauer, Mario Birkholz
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引用次数: 0

摘要

准确地从死亡的致病细胞中选择活的细胞是至关重要的,这在检测军团菌的情况下就是一个例子,这种细菌可能存在于各种水设施中,并通过引起严重的呼吸问题对公众健康构成威胁。传统的军团菌检测方法,如培养,耗时,需要几天才能产生有效的结果。此外,广泛使用的生物分析方法,如PCR,缺乏区分活细胞和死细胞的能力,导致假阳性结果的可能性。虽然介电泳被认为是一种很有前途的分离活细胞和死细胞的方法,但我们的研究与现有文献对比,揭示了分离过程和参数表征是非平凡的。为了应对这一挑战,我们的工作引入了一种新的、系统的自动视频分析方法,能够量化细胞的介电反应。通过对介电效应在不同条件下的响应系数进行分配,我们的方法确定了一个狭窄的窗口,可以利用具有上下电极的微流控流细胞从非致病性巴黎乳杆菌中成功选择活的军团菌细胞。这些发现为军团菌检测提供了关键的前期工作,证明了对最相关致病物种嗜肺乳杆菌的实验的适用性。此外,我们的方法可以转移到其他细胞类型定量检测介电泳响应和确定最佳分离参数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Electronic selection of viable Legionella cells by a video-based, quantifiable dielectrophoresis approach

Electronic selection of viable Legionella cells by a video-based, quantifiable dielectrophoresis approach

Electronic selection of viable Legionella cells by a video-based, quantifiable dielectrophoresis approach

Electronic selection of viable Legionella cells by a video-based, quantifiable dielectrophoresis approach

The accurate selection of living from dead pathogenic cells is crucial as exemplified in the context of detecting Legionella bacteria, which can be present in various water facilities and pose a threat to public health by causing severe respiratory problems. Traditional methods for Legionella detection, such as cultivation, are time-consuming, taking several days to yield valid results. Additionally, widely used bioanalytical methods like PCR lack the ability to distinguish between living and dead cells, leading to the potential for false-positive results. While dielectrophoresis has been proposed as a promising method for separating living and dead cells, our study contrasts with existing literature, revealing that the separation process and parameter characterization are non-trivial. In response to this challenge, our work introduces a novel, systematic approach of automated video analysis capable of quantifying the dielectrophoretic response of cells. By assigning a response coefficient to the dielectrophoretic effect at different conditions, our method identifies a narrow window for successful cell selection of viable Legionella cells from the non-pathogenic species L. parisiensis utilizing a microfluidic flow cell with top–bottom electrodes. These findings serve as a crucial pre-step in Legionella sensing, demonstrating applicability in experiments focused on the most relevant pathogenic species, L. pneumophila. Moreover, our method can be transferred to other cell types for quantitative detection of the dielectrophoretic response and identify optimal separation parameters.

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来源期刊
Biomedical Microdevices
Biomedical Microdevices 工程技术-工程:生物医学
CiteScore
6.90
自引率
3.60%
发文量
32
审稿时长
6 months
期刊介绍: Biomedical Microdevices: BioMEMS and Biomedical Nanotechnology is an interdisciplinary periodical devoted to all aspects of research in the medical diagnostic and therapeutic applications of Micro-Electro-Mechanical Systems (BioMEMS) and nanotechnology for medicine and biology. General subjects of interest include the design, characterization, testing, modeling and clinical validation of microfabricated systems, and their integration on-chip and in larger functional units. The specific interests of the Journal include systems for neural stimulation and recording, bioseparation technologies such as nanofilters and electrophoretic equipment, miniaturized analytic and DNA identification systems, biosensors, and micro/nanotechnologies for cell and tissue research, tissue engineering, cell transplantation, and the controlled release of drugs and biological molecules. Contributions reporting on fundamental and applied investigations of the material science, biochemistry, and physics of biomedical microdevices and nanotechnology are encouraged. A non-exhaustive list of fields of interest includes: nanoparticle synthesis, characterization, and validation of therapeutic or imaging efficacy in animal models; biocompatibility; biochemical modification of microfabricated devices, with reference to non-specific protein adsorption, and the active immobilization and patterning of proteins on micro/nanofabricated surfaces; the dynamics of fluids in micro-and-nano-fabricated channels; the electromechanical and structural response of micro/nanofabricated systems; the interactions of microdevices with cells and tissues, including biocompatibility and biodegradation studies; variations in the characteristics of the systems as a function of the micro/nanofabrication parameters.
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