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Implementing And Enhancing Evidence-based Research And Practice In Hepatology
Funder
National Health and Medical Research Council
Funding Amount
$569,219.00
Summary
The overall aim of this proposal is to tackle unmet challenges in liver disease research. This will be achieved through (a) Population level programs to deliver new treatments for patients with hepatitis C; (b) Developing integrated care models to treat hepatitis B; (c) Developing population-level programs for liver cancer control; and (d) Identification of patients at risk of severe liver disease through understanding the genetic basis of disease progression.
Hepatitis C virus (HCV), the main cause of of post-transfusion and community -acquired non-A, non-B hepatitis, infects approximately 170 million humans world-wide with some 135,000 infections in Australia alone. HCV is hyper-endemic in intravenous blood users with typical prevalence rates of 60-70%. About 75-80% of infected individuals develop a chronic infection, usually resulting in recurrent, progressively worsening liver damage. Cirrhosis develops in 10-20% of chronic cases while 1-5% of chr ....Hepatitis C virus (HCV), the main cause of of post-transfusion and community -acquired non-A, non-B hepatitis, infects approximately 170 million humans world-wide with some 135,000 infections in Australia alone. HCV is hyper-endemic in intravenous blood users with typical prevalence rates of 60-70%. About 75-80% of infected individuals develop a chronic infection, usually resulting in recurrent, progressively worsening liver damage. Cirrhosis develops in 10-20% of chronic cases while 1-5% of chronic carriers develop liver cancer. Development of an effective vaccine is complicated due to the highly variable nature of the virus. Approved therapies include alpha-interferon and alpha interferon-ribavirin combinations but these treatments induce efficacious responses in only 20-30% of patients and often have severe side-effects. It is assumed that after attachment of HCV to the cell surface, the virus is internalised by the cell and undergoes fusion with a cellular compartment referred to as an endosome. The low pH environment of the endosome is presumed to trigger viral fusion via its cell surface glycoproteins and empties the replication machinery of the virus into the cell. No reliable systems for the propagation of HCV are available thereby limiting studies into the mechanisms of how HCV infects cells and the development of vaccines. Recently a cell surface molecule, CD81, was identified as a possible receptor for the attachment of HCV to susceptible cells. Our aim is to 1) develop model systems for studying HCV entry and fusion and 2) further characterise the interaction of the HCV glycoproteins with CD81 with the goal of obtaining a three-dimersional structure of the interaction . These studies will address the fundamental questions of how HCV enters cells leading new avenues for the design of inhibitors of HCV entry.Read moreRead less
Evaluation Of Naturally Occurring Resistance To Direct Acting Antiviral Drugs (DAAs) In Individuals With Acute Hepatitis C Infection
Funder
National Health and Medical Research Council
Funding Amount
$333,778.00
Summary
Hepatitis C therapy in the future is likely to involve the use of Directly Acting Antivirals, which offer a better chance of treatment success and shorter treatment courses. The downside to these new agents is the possible development of drug resistance. Studies suggest that drug resistant strains may already exist in some individuals prior to treatment. This study plans to use sensitive methods to examine how common drug resistant strains are in untreated individuals with acute hepatitis C.
The renewal of my Practitioner Fellowship will continue to facilitate an expanding program of epidemiological and clinical research in viral hepatitis, with a primary focus on hepatitis C. New directions will include development of international clinical cohort and trials networks, particularly to characterise the natural history of early hepatitis C infection and evaluate hepatitis C therapuetic strategies for injecting drug users.
Hepatitis C Vaccines: Preclinical To Clinical Development
Funder
National Health and Medical Research Council
Funding Amount
$474,244.00
Summary
Hepatitis C is one of the most common notifiable infectious diseases in Australia with 200,000 infected individuals and 10,000 new infections each year. Treatments currently available for hepatitis C are effective but also associated with significant side effects and expensive. The economic and health burden of hepatitis C infection and the high costs of emerging antiviral therapies makes the development of an effective vaccine for HCV imperative. This project aims to develop a vaccine for the p ....Hepatitis C is one of the most common notifiable infectious diseases in Australia with 200,000 infected individuals and 10,000 new infections each year. Treatments currently available for hepatitis C are effective but also associated with significant side effects and expensive. The economic and health burden of hepatitis C infection and the high costs of emerging antiviral therapies makes the development of an effective vaccine for HCV imperative. This project aims to develop a vaccine for the prevention of hepatitis C infection.Read moreRead less
The Role Of Obesity, Insulin Resistance And Fatty Liver (steatosis) In Human Disease And Strategies To Monitor And Improve Patient Outcomes
Funder
National Health and Medical Research Council
Funding Amount
$322,892.00
Summary
The overall objective of my research activity is to examine in human subjects, the mechanisms by which obesity and fatty liver impair the response of the liver to injury and inflammation from multiple causes and to develop specific strategies to monitor and improve the outcome of treatment in overweight patients with liver disease.
Imaging The Hepatitis C Virus Life Cycle In Real-time
Funder
National Health and Medical Research Council
Funding Amount
$477,504.00
Summary
Hepatitis C virus (HCV) is a serious viral pathogen that causes significant liver disease. This proposal plans to examine how two proteins from the HCV, core and NS5A, interact with host proteins and pathways to facilitate viral replication and release of HCV; two processes that are poorly understood. Specifically we will tag viral proteins to allow us to investigate the HCV life cycle in living cells and determine the role of core and NS5A in facilitating HCV replication. This proposal may unco ....Hepatitis C virus (HCV) is a serious viral pathogen that causes significant liver disease. This proposal plans to examine how two proteins from the HCV, core and NS5A, interact with host proteins and pathways to facilitate viral replication and release of HCV; two processes that are poorly understood. Specifically we will tag viral proteins to allow us to investigate the HCV life cycle in living cells and determine the role of core and NS5A in facilitating HCV replication. This proposal may uncover novel therapeutic strategies to combat HCV.Read moreRead less
Novel Bioinformatic Methods To Determine The Link Between Genomic Complexity Of Hepatitis Viruses And Liver Disease Phenotypes
Funder
National Health and Medical Research Council
Funding Amount
$605,859.00
Summary
Bioinformatics is a discipline concerned with the study of how information is stored and used in biological systems. Here we develop bioinformatic tools to study how hepatitis viruses evolve during an infection and how these infections cause severe liver diseases.
Despite recent advances in therapeutic options, chronic viral infections, including infection with hepatitis C virus and hepatitis B virus, continue to be a significant cause of morbidity and mortality in Australia and affecting hundreds of millions of people worldwide. This R&D program aims to develop a cheaper drug formulation that is easier to deliver and more stable for transport to remote areas.