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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.
Role Of The Hepatitis C Virus Glycoprotein E2 Variable Regions In Viral Entry And Antibody Mediated Neutralization.
Funder
National Health and Medical Research Council
Funding Amount
$542,462.00
Summary
The first stage of Hepatitis C Virus replication involves attaching to liver cells. This study is aimed at understanding how the virus attaches to liver cells and how antibodies raised during infection, block this interaction. In addition, this study aims to examine how the virus modulates its structure to evade the immne system, allowing the virus to establish chronic infections. The results of this study will guide future vaccine design for HCV.
I am infectious disease physician undertaking research on natural history and therapeutic strategies in viral hepatitis, including acute hepatitis C, chronic hepatitis C and chronic hepatitis B. The hepatitis C therapeutic research has a particular focus
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