ArticleCell reports2025
Flagellar switch inverted repeats impact heterogeneity in flagellar gene expression and thus C. difficile RT027/MLST1 virulence.
Article in Cell reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- From colonization to infection: Genomic evolution of Clostridioides difficile pathogenesis.Cell reports · 2026Review
- A programmed reset mechanism primesScience advances · 2026Article
- Clostridioides difficile pathogenesis and control.Nature reviews. Microbiology · 2026Review
- In situ visualization of Clostridioides difficile phenotypic heterogeneity and single-cell morphology during gut infection.Nature communications · 2026Article
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Abstract
Clostridioides difficile (C. difficile) RT027 strains cause infections that vary in severity from asymptomatic to lethal, but the molecular basis for this variability is poorly understood. Through comparative analyses of RT027 clinical isolates, we determine that isolates that exhibit greater heterogeneity in their flagellar gene expression exhibit greater virulence in vivo. C. difficile flagellar genes are phase-variably expressed due to the site-specific inversion of the flgB 5' UTR region, which reversibly generates ON vs. OFF orientations for the flagellar switch. We find that longer inverted repeat (IR) sequences in this switch region correlate with greater disease severity, with RT027 strains carrying 6A/6T IR sequences exhibiting greater phenotypic heterogeneity in flagellar gene expression (60%-75% ON) and causing more severe disease than those with shorter IRs (>99% ON or OFF). Our results reveal that phenotypic heterogeneity in flagellar gene expression may contribute to the variable disease severity observed in C. difficile patients.
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