将声学微流体与光谱分析相结合,以实现高效的细菌溶解和分子表征
Neha Mehlawat1, Chi-Wen Tseng2, Abanoub Shenoda3
1Dynamic Micro Devices Laboratory, Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC, Australia; Monash Biospectroscopy Group, School of Chemistry, Monash University, Melbourne, VIC, Australia.
Biosensors & bioelectronics
|August 12, 2025
概括
我们开发了一种无试剂的声流体平台,用于使用大批声波 (BAW) 快速的细菌溶解. 这种方法在几毫秒内有效溶解细菌,保存生物分子用于下游分析.
科学领域:
- 生物技术是生物技术.
- 微生物学 微生物学
- 分析化学 分析化学
背景情况:
- 细菌溶解对于诊断至关重要,但传统方法面临挑战.
- 现有的技术往往会损害生物分子的完整性,增加工作流程的复杂性.
- 需要有效的,无试剂的细菌溶解方法.
研究的目的:
- 介绍一种用于快速细菌溶解的新型声流体平台.
- 为了证明溶解方法的无试剂,非热性质.
- 评估溶解方法与下游应用的效率和兼容性.
主要方法:
- 利用大批声波 (BAWs) 来产生声流和剪切力来破坏细菌细胞.
- 使用的是格兰氏阴性 (大肠杆菌) 和格兰氏阳性 (菌) 细菌.
- 通过殖民地计数,活/死成像和DNA量化来评估溶解效率.
- 综合里叶变换红外 (FT-IR) 光谱仪用于生物分子表征.
- 确认了样品完整性和与聚合酶链反应 (PCR) 和蛋白质量测试的兼容性.
主要成果:
- 在几毫秒内实现了高的溶解效率:大肠杆菌约82%和E. faecalis约50%.
- 证明了生物分子 (蛋白质,核酸,脂质) 在溶解后的增强光谱强度的保存.
- 确认了成功的下游应用,包括16S rRNA基因PCR放大和蛋白质定量.
- 验证了声流体溶解过程的无试剂和非热性质.
结论:
- 声流体平台为细菌溶解提供了快速,高效和无试剂的溶液.
- 这种方法保持了生物分子的完整性,使其适合各种下游分子分析.
- 简化和可扩展的方法将污染风险降至最低,非常适合集成诊断平台和环境监测.
相关概念视频
01:18Imaging Biological Samples with Optical Microscopy
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
01:37Super-resolution Fluorescence Microscopy
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
01:29Two-Dimensional Microscopy in Microbiology
Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
01:28Three-Dimensional Microscopy in Microbiology
Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
01:30Methods to Assess Microbial Populations
Assessing microbial populations is crucial for understanding microbial roles in health, ecology, and industry. Various complementary techniques—both culture-based and molecular—enable detailed analysis of microbial abundance, diversity, and function.Viable Plate CountThe viable plate count is a traditional culture-based method used to estimate the number of living microbes in a sample. After serial dilution, the sample is spread onto nutrient agar plates. Each viable cell forms a visible...