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The Ability Of Sunscreens To Protect Against The Induction Of Solar Irradiation-induced Melanocytic Naevi In Vivo.
Funder
National Health and Medical Research Council
Funding Amount
$106,854.00
Summary
Melanoma is an increasing problem in Australia. Strong evidence supports the finding that the number of moles on skin is a good indicator of future melanoma risk and a short term marker of adverse reactions to melanoma-inducing sun exposure in humans. While recommendations for sun protection have been proposed for many years, it is currently unknown what component of sunlight induces melanoma or whether sunscreens protect against the formation of melanoma. Using an animal model for human moles o ....Melanoma is an increasing problem in Australia. Strong evidence supports the finding that the number of moles on skin is a good indicator of future melanoma risk and a short term marker of adverse reactions to melanoma-inducing sun exposure in humans. While recommendations for sun protection have been proposed for many years, it is currently unknown what component of sunlight induces melanoma or whether sunscreens protect against the formation of melanoma. Using an animal model for human moles of the skin we aim in contributing to the answers of these two questions .Read moreRead less
Investigation Of The Role Of Specific Mucous Associated Bacteria In Children And Young Adults With Crohns Disease
Funder
National Health and Medical Research Council
Funding Amount
$431,764.00
Summary
The role of bacteria in Crohn's disease is well accepted however to date no conclusive agents have been identified. Recent animal studies have implicated mucus-associated bacteria. We have recently shown that such bacteria, the Helicobacteriaceae, are present in humans and children with Crohn's disease. The aim of this project is to determine in children and young adults the role of these bacteria in IBD thus providing information that could be used to design improved therapies for IBD.
Novel Compounds For Use As Inhibitors Of Virulence Of Human Pathogens
Funder
National Health and Medical Research Council
Funding Amount
$220,500.00
Summary
There is growing concern over the emergence of multi-drug resistant strains of bacteria which are no longer treatable with the current generation of antibiotics. This highlights the urgent need for development of the next generation of therapeutic agents to supplement or replace the current antibiotics. Our research team has identified a class of compounds which are naturally produced by a marine alga that may be effective in the control of bacterial pathogens. These compounds work by interferin ....There is growing concern over the emergence of multi-drug resistant strains of bacteria which are no longer treatable with the current generation of antibiotics. This highlights the urgent need for development of the next generation of therapeutic agents to supplement or replace the current antibiotics. Our research team has identified a class of compounds which are naturally produced by a marine alga that may be effective in the control of bacterial pathogens. These compounds work by interfering with the way many pathogens regulate the production of virulence traits. Some bacteria are able to signal members of their population by the specific uptake and recognition, through a receptor protein, of chemical cues they secrete into the environment. Accumulation of these cues or signals triggers expression of the genes that code for the virulence traits. Moreover, one particular class of these signal response proteins has been identified in many pathogens and has been shown to regulate protease production and production of a protective extracellular slime layer called a capsule. If one or more of these traits can be blocked, then the virulence of the bacterium can be reduced. We have preliminary data which demonstrates that the algal compounds do in fact prevent the expression of virulence traits and thus should be useful as new agents for the treatment of disease. The causative agents of cholera and severe gatroenteritis, Vibrio cholerae and V. parahaemolyticus respectively, have one or the other of these virulence traits, but the pathogen Vibrio vulnificus has all three and therefore is an excellent model pathogen. We propose to explore the ability of the algal compounds to specifically shut down expression of virulence factors with a long term aim for the development of these compounds as novel antimicrobial therapies for the post-antibiotic era.Read moreRead less
Some of the world's most important diseases, including important diseases of indigenous chilren and the hospitalised elderly are caused by bacteria that carry a surface coating called a capsule. It is not clear how this capsule is retained by bacteria. Resolution of this question could lead to the development of new disinfectants that will stop hospital-acquired infections, to new reagents that can be incoporated into medical devices where bacteria frequently grow, and new antibiotics.
The Mechanisms Of Infection Of Bronchial Epithelial Cells By Human And Avian Influenza Viruses In Chronic Airways Disease
Funder
National Health and Medical Research Council
Funding Amount
$395,559.00
Summary
Influenza is an important infection that causes disease every year in the Australian population. People with lung disease are at particular risk to its effects. The ability of the virus to grow in birds and change its appearance to our immune system allows this virus to cause severe disease every year. We will examine the immune response to this virus in human cells, comparing this response to human and bird strains of the virus and see why subjects with lung disease are more susceptible.
Targeting Fungal Phospholipid Metabolism For Antifungal Drug Discovery
Funder
National Health and Medical Research Council
Funding Amount
$828,557.00
Summary
Invasive fungal infections are a serious and escalating health problem. They cause severe disease with a high death rate and are very costly to the health system. New antifungal drugs with novel properties are needed now because there are problems with current drugs. This project aims to develop potent new antifungal drugs that are effective in many fungal diseases and are well-tolerated.
Novel Use Of Fungal Entomopathogens For Sustainable Control Of Mosquito-borne Viruses
Funder
National Health and Medical Research Council
Funding Amount
$605,993.00
Summary
Mosquito-born viruses such as Dengue, Ross River and Barmah Forest are increasing in regional significance. At a broader scale, an estimated 2.5 billion people live in areas at risk of epidemic Dengue transmission. Chemical insecticides are the mainstay of current mosquito control throughout many parts of the world. However, problems of insecticide resistance, environmental contamination and risks to human health, mean that chemical pesticides have not provided a universal solution, either as ou ....Mosquito-born viruses such as Dengue, Ross River and Barmah Forest are increasing in regional significance. At a broader scale, an estimated 2.5 billion people live in areas at risk of epidemic Dengue transmission. Chemical insecticides are the mainstay of current mosquito control throughout many parts of the world. However, problems of insecticide resistance, environmental contamination and risks to human health, mean that chemical pesticides have not provided a universal solution, either as outdoor sprays, residual house sprays or as insecticide treated nets. This creates a pressing need for practical alternatives. Building on approaches and technologies developed for control of locusts in Australia and Africa, we have recently discovered that the ability of mosquitoes to transmit malaria can be substantially reduced with insect fungal pathogens used as biological pesticides. We found that exposure to biopesticide-treated surfaces reduced the number of mosquitoes able to transmit malaria 80-fold. Other supporting data from semi-field trials confirm the feasibility of infecting mosquitoes under real field conditions. Together, these results represent a significant advance in the development of a cheap and sustainable biological alternative to chemical insecticides for disease control. We now wish to extend this research to explore the potential for use of fungal pathogens in control of mosquito-borne viruses. Preliminary studies already confirm that we can infect the key mosquito species responsible for transmitting Dengue. The aim of the current project is to conduct a more comprehensive evaluation of a wider range of fungal isolates to identify strains with the greatest potential to stop transmission of mosquito-borne viruses. The longer term goal is to translate this research into a practical product. Such a product would offer a cheap, environmentally friendly disease control measure, with reduced potential for resistance evolution.Read moreRead less
Characterisation Of A Novel Type Of Promoter Controlling Expression Of Virulence Genes In Neisseria.
Funder
National Health and Medical Research Council
Funding Amount
$200,880.00
Summary
This project will investigate how two different types of bacteria control genes that are involved in determining their disease-causing ability. The expression of many bacterial genes is controlled by a sophisticated battery of regulatory systems that respond to individual, very specific, environmental signals. Such regulatory systems are capable of exerting very precise control over the level of gene expression, in response to the concentration of specific molecules in the immediate environment. ....This project will investigate how two different types of bacteria control genes that are involved in determining their disease-causing ability. The expression of many bacterial genes is controlled by a sophisticated battery of regulatory systems that respond to individual, very specific, environmental signals. Such regulatory systems are capable of exerting very precise control over the level of gene expression, in response to the concentration of specific molecules in the immediate environment. However, there is evidence to suggest that many important disease-causing bacteria are much less reliant on specific regulatory systems. Instead, these bacteria rely more heavily what have been termed global systems for the regulation of gene expression. Such systems typically respond to less specific signals, such as the growth rate of the bacterial cell, but nevertheless appear capable of very precise control. We have evidence for a previously uncharacterised type of global control system that appears to be widespread amongst bacteria. It is likely that many virulence genes in a variety of disease-causing bacteria will prove to be controlled by similar means. Therefore this project will not only provide an insight into how expression of these particular virulence determinants is regulated, but will yield data that may help in our understanding of precise global regulatory processes in other bacterial species of medical importance.Read moreRead less