Dual RNA-seq identifies genes and pathways modulated during Clostridioides difficile colonization.

Area of Science:

• Microbiology
• Infectious Diseases
• Gastroenterology

Background:

• Clostridioides difficile infection (CDI) is a major cause of hospital-acquired diarrhea.
• Early host-pathogen interactions are critical for CDI establishment but are poorly understood due to technical challenges.
• Understanding these initial molecular events is vital for developing effective interventions.

Purpose of the Study:

• To investigate the transcriptional changes in both Clostridioides difficile and host colonic cells during the initial 24 hours of infection.
• To identify key molecular pathways and bacterial virulence factors modulated during early CDI.
• To provide a comprehensive view of the host-pathogen dynamics in the early stages of infection.

Main Methods:

• Utilized dual RNA sequencing to analyze gene expression profiles of C. difficile and human colonic cells simultaneously.
• Examined transcriptional changes within the first 24 hours post-infection.
• Performed pathway enrichment analysis to identify modulated biological processes.

Main Results:

• Identified significant transcriptional alterations in both the bacterium and host cells upon initial contact.
• Observed changes in metabolic pathways and virulence-associated factors of C. difficile.
• Characterized the functions of bacterial factors that are modulated during the early infection process.

Conclusions:

• The early stages of C. difficile infection involve dynamic transcriptional reprogramming in both the pathogen and the host.
• Dual RNA sequencing provides valuable insights into host-pathogen interactions during CDI.
• This study enhances our understanding of the critical initial events in C. difficile pathogenesis.