This mechanistic study proposes that the small RNA vvrr1 post-transcriptionally represses LeuO, linking the VarS/VarA-Csr cascade to LuxO, exopolysaccharide production, biofilm architecture and virulence in Vibrio alginolyticus. Genetics, sequencing and molecular simulation support the circuit, but it is not yet an intervention trial in aquaculture.
Key findings
- vvrr1 targeted leuO mRNA and accelerated its decay. LeuO positively regulated biofilm formation and virulence and directly repressed varS. Altered VarS/VarA activity propagated through csrB, csrC and csrD, CsrA sequestration and LuxO derepression to influence exopolysaccharide production and biofilm architecture.
Why this matters globally
The circuit advances understanding of Vibrio virulence regulation and offers multiple nodes for anti-biofilm development, potentially supporting antimicrobial-sparing aquaculture if selective agents can be developed and validated in animals.
Thai researcher contribution
Theerakamol Pengsakul of the Health and Environmental Research Center, Faculty of Environmental Management, Prince of Songkla University, is the Thai-affiliated co-author in a network led by Chinese aquaculture and biotechnology institutes.
Limitations to consider
The abstract does not specify replication, effect sizes or detailed virulence models. Laboratory regulation may differ in animals, multispecies biofilms or farms, and perturbing a global regulator could have unintended microbial or ecological effects.
Verify the original sources
Animal Research and One HealthRead the original article↗DOI: 10.1002/aro2.70090