Transcriptome profiling to understand host-bacteria
interactions: Past, present and future
Sheila Nathan
ABSTRACT: Despite advances in antimicrobials, vaccination and public health measures, bacterial infectious diseases
remain a leading cause of morbidity and mortality worldwide. With the increase in antimicrobial resistance and the
emergence of new bacterial pathogens, there remains a need for better understanding of the host response to infection.
This would lead to new paths of basic research and the identification of potential diagnostic biomarkers and new drug
targets to overcome issues of antibiotic resistance. Bacterial pathogens have evolved strategies to promote their survival
by significantly over-riding the transcriptional profile of the host cells they infect. In particular, pathogen-encoded
effector molecules modulate host cells through different mechanisms. Transcriptomics is a powerful way to gauge these
changes in mechanism of either bacterial or eukaryotic cells under a given condition. Microarray technology and more
recently RNA sequencing are well established tools to unravel host-pathogen interactions which is of central importance
to understand the host response to a particular bacterial infection or the mechanisms employed by a pathogenic bacteria
to subvert host defenses. The establishment of dual RNA-sequencing has enabled the profiling of gene expression
changes simultaneously in an infecting bacterium and its infected host. This technology is able to provide greater
discriminative power to study the pathogen and host simultaneously throughout the infection process. This review
provides an overview of the transcriptome-based tools utilised and new knowledge obtained from dissecting hostpathogen interactions.
Department of Biological Sciences and Biotechnology, Faculty of Science and Technology,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia