Novel Epigenetic Regulatory Mechanisms In Moraxella Catarrhalis And Non-typeable Haemophilus Influenzae: Impact On Vaccine Development And Role In Pathobiology
Funder
National Health and Medical Research Council
Funding Amount
$626,979.00
Summary
Moraxella catarrhalis (Mcat) and non-typeable Haemophilus influenzae (NTHI) are two major causes of middle ear infections in children, and respiratory disease in adults. This project aims to characterise novel regulatory mechanisms associated with disease isolates of these bacteria. This research will aid vaccine development by defining the repertoire of stably expressed potential vaccine targets of Mcat and NTHi, and will improve our understanding of host-pathogen interactions.
Iron, Pseudomonas Aeruginosa And Lung Disease In Cystic Fibrosis.
Funder
National Health and Medical Research Council
Funding Amount
$322,875.00
Summary
Cystic fibrosis (CF) is the most common lethal geneticdisease in Caucasians. The worldwide incidence of the disorder is approximately 1 in 2,500 live births. The most significant clinical manifestation of CF is chronic lung infection, particularly with the bacterium, Pseudomonas aeruginosa. Even with the current aggressive antibiotic treatment regimens most patients ultimately succumb to infection with this organism and die before they reach 40 years-of-age. The overall aim of our work is to inc ....Cystic fibrosis (CF) is the most common lethal geneticdisease in Caucasians. The worldwide incidence of the disorder is approximately 1 in 2,500 live births. The most significant clinical manifestation of CF is chronic lung infection, particularly with the bacterium, Pseudomonas aeruginosa. Even with the current aggressive antibiotic treatment regimens most patients ultimately succumb to infection with this organism and die before they reach 40 years-of-age. The overall aim of our work is to increase the understanding of how P. aeruginosa persists in the CF lung, with the goal of developing more effective therapeutic strategies to eliminate chronic infection with this bacterium. The new perception is that P. aeruginosa bacteria flourish in mucus with a low oxygen content within the CF lung and persist despite aggressive antibiotic therapy because they have adopted an antibiotic-resistant, biofilm mode of growth. This has opened up exciting directions for new therapeutic strategies. Factors in CF mucus that regulate this mode of bacterial growth are potential targets for intervention. Our past work has shown that iron is likely to be one such factor. In this study, we will extend these findings and determine whether using iron-binding chemicals can disrupt these biofims and allow the host immune system and antibiotics to work more efficiently to kill the bacteria. Not only will this study provide further insights into the pathogenesis of P. aeruginosa in CF and the role of iron, but ultimately it will contribute to the improved treatment and prevention of chronic infection with this organism.Read moreRead less
Phase Variable Protein Glycosylation In Bacteria Mucosal Pathogens And Its Role In Immune Evasion
Funder
National Health and Medical Research Council
Funding Amount
$409,728.00
Summary
The bacterium Haemophilus influenzae is a leading cause of ear infections. Hearing loss from these infections can seriously affect literacy and educational performance. As no vaccine is available, we will research how the bacterium makes the HMW protein that is important in infection. We will study how sugars are added to the surface of this protein so that the bacterium can escape the immune system, its role in related bacteria and how it may be used in a vaccine.