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Gene Expression Profiling of Infecting Microbes Using a Digital Bar-coding Platform

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VFG-Chip: A high-throughput qPCR microarray for profiling virulence factor genes from the environment.

Shu-Ting Xie¹, Long-Jun Ding¹, Fu-Yi Huang²

¹State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China.

Environment International

|January 22, 2023

Summary

A new high-throughput qPCR chip, VFG-Chip, enables comprehensive quantification of virulence factor genes (VFGs) from zoonotic pathogens in the environment. This tool aids in assessing public health risks associated with these environmental contaminants.

Keywords:

High-throughput qPCR VFG-Chip Virulence factor genes Wastewater treatment system Zoonotic pathogenic bacteria

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Bacterial Gene Expression Analysis Using Microarrays

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Published on: May 28, 2007

Area of Science:

Environmental microbiology
Molecular biology
Public health

Background:

Zoonotic pathogens pose global public health risks.
Environmental presence of virulence factor genes (VFGs) is a latent threat.
Current methods for profiling environmental VFGs are limited.

Purpose of the Study:

To develop a novel high-throughput quantitative PCR (HT-qPCR) chip for comprehensive VFG quantification.
To assess the distribution and abundance of VFGs in environmental samples.

Main Methods:

Development of VFG-Chip targeting 96 VFGs from four key bacterial pathogens (Klebsiella pneumoniae, Acinetobacter baumannii, Escherichia coli, Salmonella enterica) using 120 primer pairs.
Computational and experimental validation of VFG-Chip specificity, sensitivity, and amplification efficiency.
Application of VFG-Chip to profile VFGs in a wastewater treatment system.

Main Results:

VFG-Chip demonstrated high specificity, sensitivity, and an average amplification efficiency of 97.7%.
The chip successfully profiled VFGs in a wastewater treatment system, detecting 69 distinct VFGs.
Computational and experimental validation confirmed the chip's robust capability.

Conclusions:

VFG-Chip is a reliable tool for comprehensive environmental quantification of VFGs.
This technology provides novel insights into the distribution of zoonotic pathogen VFGs.
The findings support enhanced assessment of public health risks posed by environmental pathogens.