Harnessing RGDS peptides to regulate bacterial-host interfaces for targeted antimicrobial therapy

Area of Science:

• Microbiology
• Biophysics
• Infectious Diseases

Background:

• Multidrug-resistant bacterial infections present a critical global health challenge.
• Host-directed antimicrobial strategies offer a promising alternative to traditional antibiotics.
• Understanding bacterial-host interactions is key to developing new treatments.

Purpose of the Study:

• To propose and validate a mechanobiology-based host-directed antimicrobial strategy using Arg-Gly-Asp-Ser (RGDS) peptides.
• To investigate the effect of RGDS peptides on bacterial-host adhesion forces.
• To evaluate the efficacy of RGDS as an antibiotic adjuvant against multidrug-resistant bacteria.

Main Methods:

• Utilized Arg-Gly-Asp-Ser (RGDS) peptides to interfere with bacterial-host adhesion.
• Employed single-cell force spectroscopy (SCFS) to quantify changes in adhesion forces.
• Assessed the in vivo antimicrobial efficacy in three distinct animal models.

Main Results:

• RGDS peptides effectively regulated bacterial-host interfacial adhesion forces.
• RGDS demonstrated significant potential as an antibiotic adjuvant, reducing antibiotic dosage by 75%.
• RGDS-enhanced low-dose antibiotic treatment showed validated in vivo antimicrobial efficacy.

Conclusions:

• Mechanobiology-based host-directed strategies offer a novel approach to combatting drug-resistant bacteria.
• RGDS peptides can be utilized to inhibit bacterial colonization and enhance antibiotic effectiveness.
• This strategy holds broad potential for addressing the global threat of antibiotic resistance.