Unraveling autotransporter function in bacterial aggregates and biofilms. Autotransporters are a large family of bacterial proteins that play a central role in pathogenesis. They promote the formation of cell clusters and biofilms, which are mechanisms for bacterial resistance to host immune factors and antibiotics. Currently, the precise mode of action of autotransporters is unknown. This project will examine the interplay between the structure and function of key autotransporter proteins. It ....Unraveling autotransporter function in bacterial aggregates and biofilms. Autotransporters are a large family of bacterial proteins that play a central role in pathogenesis. They promote the formation of cell clusters and biofilms, which are mechanisms for bacterial resistance to host immune factors and antibiotics. Currently, the precise mode of action of autotransporters is unknown. This project will examine the interplay between the structure and function of key autotransporter proteins. It is expected that the outcomes of this research will establish how these proteins mediate aggregation and biofilm formation. It may also provide three-dimensional structures of proteins that are strongly immunogenic and may represent targets for future vaccine design, as well as identify molecules that inhibit autotransporter function.Read moreRead less
Structural insights of virus-glycan interactions. Influenza virus, rotavirus and Dengue virus infect the body by adhering to certain types of sugars on the human cell surface. This project will develop a detailed structural understanding of how viruses interact with those sugar molecules for the development of novel drugs and vaccines to combat influenza and rotaviral infections.
Understanding the mechanism of Wolbachia-mediated antiviral protection. Insects are involved in the transmission of many viral diseases of both plants and animals. A considerable number of these diseases have adverse effects for public health or cause large economic losses in agriculture. We were the first to discover that a common bacteria protects insects from virus infection. Knowledge of the mechanisms used by the bacteria to interfere with virus accumulation will facilitate novel strategies ....Understanding the mechanism of Wolbachia-mediated antiviral protection. Insects are involved in the transmission of many viral diseases of both plants and animals. A considerable number of these diseases have adverse effects for public health or cause large economic losses in agriculture. We were the first to discover that a common bacteria protects insects from virus infection. Knowledge of the mechanisms used by the bacteria to interfere with virus accumulation will facilitate novel strategies for control of virus disease. The findings of this project will enable Australian researchers and industry to design innovative approaches to control diseases that are transmitted by insects.Read moreRead less
How auto-transporter proteins mediate bacterial interactions. This project aims to investigate the structure-function relationships that underpin key auto-transporter roles in bacterial cell adhesion, aggregation and biofilm formation. Auto-transporter proteins are extremely common in bacteria where they play a central role in controlling bacterial interactions with other bacteria, with human cells, and with surfaces. This project will define the molecular mechanisms underlying these processes. ....How auto-transporter proteins mediate bacterial interactions. This project aims to investigate the structure-function relationships that underpin key auto-transporter roles in bacterial cell adhesion, aggregation and biofilm formation. Auto-transporter proteins are extremely common in bacteria where they play a central role in controlling bacterial interactions with other bacteria, with human cells, and with surfaces. This project will define the molecular mechanisms underlying these processes. This will have significant benefits, such as providing the basis for the development of approaches to block auto-transporter functions that contribute to the establishment of persistent and difficult to treat bacterial infections.Read moreRead less
Do insect-specific flaviviruses regulate the transmission of mosquito-borne diseases in Australia? Mosquito-borne viral diseases such as dengue occur in Australia. The research team recently discovered related viruses in mosquitoes from Darwin that do not infect humans, but may inhibit the spread of viral diseases by mosquitoes. This project will investigate the life cycles of these new viruses to understand how they affect the spread of viral diseases by mosquitoes.
Ross River virus - identification of virulence determinants in clinical isolates from across Australia. In Australia, Ross River virus (RRV) is the most common insect borne virus that affects human health. There were more than 60,000 confirmed cases of RRV between 1993 and 2008. While not fatal, the disease is responsible for significant morbidity that has both social and economic costs for the individual, their family and the community. The project has several national benefits. It will elucida ....Ross River virus - identification of virulence determinants in clinical isolates from across Australia. In Australia, Ross River virus (RRV) is the most common insect borne virus that affects human health. There were more than 60,000 confirmed cases of RRV between 1993 and 2008. While not fatal, the disease is responsible for significant morbidity that has both social and economic costs for the individual, their family and the community. The project has several national benefits. It will elucidate whether there is any association between RRV strain and the severity of human disease. It will also identify viral markers that could assist public health officials in determining likely disease outcomes of outbreaks and could provide new avenues for the design of antiviral strategies.Read moreRead less
Mosquito-borne viruses - how they cause disease and novel approaches to prevention. In Australia, Ross River virus (RRV) is the most common insect borne virus that affects human health. There were more than 60,000 confirmed cases of RRV between 1993 and 2008. While not fatal, the disease is responsible for significant morbidity that has both social and economic costs for the individual, their family and the community. This project has several national benefits. It will elucidate whether there is ....Mosquito-borne viruses - how they cause disease and novel approaches to prevention. In Australia, Ross River virus (RRV) is the most common insect borne virus that affects human health. There were more than 60,000 confirmed cases of RRV between 1993 and 2008. While not fatal, the disease is responsible for significant morbidity that has both social and economic costs for the individual, their family and the community. This project has several national benefits. It will elucidate whether there is an association between RRV strain and the severity of disease and if there are human factors that affect the seriousness of symptoms. Knowledge of both of these could provide new avenues for the design of prevention and treatment strategies.Read moreRead less
The biology of arbovirus virulence and fitness in arthropod and vertebrate hosts in vivo. In Australia, Ross River virus (RRV) represents significant concern to human health. Between 1992-2005 more than 50,000 notifications of RRV infection have been reported. While not fatal, the disease is responsible for morbidity in the community/individual that can have both social and economic costs. The project has several national benefits. It will help elucidate whether there is any association between ....The biology of arbovirus virulence and fitness in arthropod and vertebrate hosts in vivo. In Australia, Ross River virus (RRV) represents significant concern to human health. Between 1992-2005 more than 50,000 notifications of RRV infection have been reported. While not fatal, the disease is responsible for morbidity in the community/individual that can have both social and economic costs. The project has several national benefits. It will help elucidate whether there is any association between RRV strain and increased risk of RRV transmission and/or occurrence of more severe cases of human disease. It will help develop technologies that can lead towards the identification of viral markers, which could provide new avenues in the design of novel antiviral strategies.
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Mechanisms of virus transport in indoor environments. The socio-economic benefits to Australia from the project will include the developed and validated model for quantification of virus spread and survival through aerosolation processes, which will become an important tool for: (i) prediction of the pathways of virus spread in indoor environment, and (ii) developing future directions for management and control for prevention or minimization the likelihood of human infections. The ultimate econo ....Mechanisms of virus transport in indoor environments. The socio-economic benefits to Australia from the project will include the developed and validated model for quantification of virus spread and survival through aerosolation processes, which will become an important tool for: (i) prediction of the pathways of virus spread in indoor environment, and (ii) developing future directions for management and control for prevention or minimization the likelihood of human infections. The ultimate economic benefit of this research will be reduction in health care costs and lost productivity. The research will also place Australia in the forefront of international progress and race towards toward better methods for virus spread prevention. Read moreRead less
Herpesvirus entry into mammalian hosts. Herpesviruses infect most mammals and cause much chronic disease. Our poor understanding of their host entry pathways limits infection control. The olfactory neuroepithelium has been identified as a key entry portal for both a murid herpesvirus and a human pathogen, Herpes simplex virus, suggesting that many herpesviruses use this route. Virions cross the olfactory mucus on neuronal cilia, then either infect neurons or transfer to glial cells for local spr ....Herpesvirus entry into mammalian hosts. Herpesviruses infect most mammals and cause much chronic disease. Our poor understanding of their host entry pathways limits infection control. The olfactory neuroepithelium has been identified as a key entry portal for both a murid herpesvirus and a human pathogen, Herpes simplex virus, suggesting that many herpesviruses use this route. Virions cross the olfactory mucus on neuronal cilia, then either infect neurons or transfer to glial cells for local spread. This project will identify key receptor interactions and map the extent of invasion. By advancing our basic understanding of these important viruses and their uptake at an abundantly exposed but little explored anatomical site, the project can establish a basis for vaccinating against chronic disease.Read moreRead less