Bacterial Biofilm Pathogens Group
School of Medical Sciences, Sydney Infectious Dieases Institute,
The Charles Perkins Centre, Faculty of Medicine and Health,
The University of Sydney, Sydney NSW, Australia
Centre Lead: Associate Professor Jim Manos
Website: https://sydney.edu.au/medicine-health/about/our-people/academic-staff/jim-manos.html
Email: Jim.manos@sydney.edu.au
The research team has been studying how harmful bacteria, like Pseudomonas aeruginosa, Proteus mirabilis, and Staphylococcus aureus, cause infections in the human body for over 15 years. What they have discovered is that the more dangerous strains of these bacteria tend to create stronger biofilms. These biofilms act like protective shields, making it difficult for antibiotics to reach and kill the bacteria, leading to persisting infections.
The team’s focus has been on urinary tract infections (UTIs), and they have been working closely with urology clinicians in major hospitals to analyse clinical samples. Their research has unveiled variations in the composition of the biofilm matrix, the protective layer formed by bacteria, in UTI-causing strains like Uropathogenic E.coli (UPEC), as well as strains of P. aeruginosa, P. mirabilis, and Enterobacter faecalis.
In collaboration with their industry partner, Whiteley Corporation, they are dedicated to developing and testing combined treatments. These treatments aim to disrupt the biofilm matrix, allowing antibiotics to effectively reach and eliminate the underlying bacteria. Their combined approach, involving antioxidants, antibiotics, and adjuvants, has shown promising results in both catheter-associated and non-catheter-associated bladder infections, based on our innovative glass bladder model.
Their ongoing partnership with Whiteley Corporation chemists is helping us expand the range and improve the composition of the combination treatments. The goal is to cover various types of UTI-causing bacteria, ensuring safety and meeting other requirements for eventual approval by regulatory agencies like the Therapeutic Goods Administration (TGA). Their ultimate aim is to provide an effective treatment for urinary tract infections.
Relevant publications:
- Manoharan et al. N-acetylcysteine prevents catheter occlusion and inflammation in catheter associated-urinary tract infections by suppressing urease activity Frontiers in Cellular and Infection Microbiology 2023 1 doi.org/10.3389/fcimb.2023.1216798.
- Manoharan et al. N-acetylcysteine protects bladder epithelial cells from bacterial invasion and displays antibiofilm activity against urinary tract bacterial pathogens Antibiotics 2021 10 900 doi.org/10.3390 /antibiotics10080900. PMID:34438950.
- Das et al. Conditions Under Which Glutathione Disrupts the Biofilms and Improves Antibiotic Efficacy of Both ESKAPE and Non-ESKAPE Species Frontiers in Microbiology 2019 doi:10.3389/fmicb.2019.02000 PMID:31543871.