Can blocking host protein on catheters prevent CAUTI?
Liquid-infused silicone catheters reduced host-protein deposition (~6.5-fold for secreted proteins) and lowered microbial colonization and dissemination in a mouse CAUTI model.
Source
Inhibiting host-protein deposition on urinary catheters reduces associated urinary tract infections
What they did
Showed fibrinogen deposition aids multiple uropathogens, then tested liquid-infused silicone catheters in mouse CAUTI to cut host-protein scaffolds and measured colonization plus surface proteomics.
What they found
Fg benefits E. faecalis, E. coli, P. aeruginosa, K. pneumoniae, A. baumannii, and C. albicans. LIS catheters reduced protein deposition and decreased colonization on catheters, in bladders, and dissemination; other host-secreted proteins were ~6.5-fold lower than unmodified catheters.
The limits
What it doesn't show
Mouse CAUTI efficacy is not yet a human clinical trial; durability, biocompatibility, and real-world infection rates remain to be proven.
Key terms
- CAUTI
- Catheter-associated urinary tract infection; ~40% of hospital-acquired infections.
- Fibrinogen (Fg)
- Host serum protein deposited on catheters that microbes use as a binding scaffold.
- LIS catheter
- Liquid-infused silicone catheter designed to resist host-protein deposition.
- UM catheter
- Unmodified catheter comparator in deposition/colonization assays.
- Antibiotic-sparing
- Intervention aiming to reduce infection without relying on antimicrobial impregnation.
- Uropathogen
- Microbe capable of causing urinary tract infection, including bacteria and Candida.
Flashcards
Research intelligence for this paper
See its role on concept claims, tensions it is part of, placement history, and related discoveries.
Quiz yourself
CAUTIs account for roughly what share of HAIs?
Common questions
How common are CAUTIs among HAIs?
About 40% of hospital-acquired infections.
What catheter strategy was tested?
Liquid-infused silicone (LIS) to reduce host-protein deposition.
Effect on secreted host proteins?
About 6.5-fold less deposition vs unmodified catheters.
Infection readout timing?
Mice sacrificed at 24 hours post infection.
More on Host–pathogen