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Novel Generic Vaccine Approaches Applied For The Prevention Of Hepatitis C And Influenza Virus Infections.
Funder
National Health and Medical Research Council
Funding Amount
$392,328.00
Summary
For the induction of good immune responses, antigens should be delivered in several copies on a defined particle. The small envelope protein (HBsAg) encoded by the hepatitis B virus (HBV) has the capacity to self-assemble with host derived lipids into VLPs. HBsAg VLPs are the sole component of one of the most successful vaccines, and clinical trials have shown that they are a successful delivery system for foreign epitopes or protein domains. Hepatitis C virus (HCV) and Influenza viruses are maj ....For the induction of good immune responses, antigens should be delivered in several copies on a defined particle. The small envelope protein (HBsAg) encoded by the hepatitis B virus (HBV) has the capacity to self-assemble with host derived lipids into VLPs. HBsAg VLPs are the sole component of one of the most successful vaccines, and clinical trials have shown that they are a successful delivery system for foreign epitopes or protein domains. Hepatitis C virus (HCV) and Influenza viruses are major human pathogens. HCV has infected 200 million people worldwide, and there is no effective vaccine available. Influenza continues to affect thousands of people each year causing epidemics with severe morbidity and considerable mortality. Current influenza vaccines are mostly inactivated formulations and they exhibit poor immunogenicity in immunological naive persons such as children and in the elderly. The influenza vaccines are not optimal for stimulation of cell-mediated immunity. We propose to use particulate antigens as a delivery platform for influenza and HCV-specific epitopes with the focus to develop approaches to target various HCV and influenza strains, including H5N1 bird influenza. We have successfully produced modified VLPs containing HCV-specific sequences, which are able to induce anti-HCV antibodies with neutralising capacity. We hypothesise that the design of VLPs with an appropriate set of HCV-specific antigens will enhance the neutralising capacity of anti-HCV sera and this may overcome strain specificity. This application will exploit a prototype delivery system to induce antibody and also cellular responses against a variety of HCV- and influenza specific target sequences (epitopes). The outcome of this study will be a prototype multivalent vaccine to a range of HCV- and influenza-specific epitopes. As a delivery system this will be ideal for vaccination against agents that are highly variable.Read moreRead less
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
A Universal Prophylactic Vaccine For Hepatitis C Virus
Funder
National Health and Medical Research Council
Funding Amount
$643,337.00
Summary
Hepatitis C Virus (HCV) infects 200 million people world wide. An effective vaccine to prevent HCV is urgently needed but must afford protection against the 7 diverse genotypes. In this project grant we aim to further define the quality of the immune response that is generated by a novel HCV vaccine candidate that generates pan-genotypic immunity, its unique structural features, and methods of manufacturing so that it can be tested in a future phase I human clinical trial.
Prophylactic Vaccine Development For The Elimination Of Hepatitis C
Funder
National Health and Medical Research Council
Funding Amount
$936,752.00
Summary
A vaccine that prevents Hepatitis C is urgently needed to prevent infection and assist with global HCV elimination targets. This project grant will advance world-leading HCV vaccine candidates that generate both humoral and cellular immunity for clinical development.
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.
Humoral And Neutralising Antibody Responses To Self-adjuvanting Recombinant HCV Virus Like Particles
Funder
National Health and Medical Research Council
Funding Amount
$118,796.00
Summary
Hepatitis C virus (HCV) infects 3% of the world's population and causes an estimated 476,000 deaths per year as a result of HCV associated end-stage liver disease. HCV is one of the most common notifiable infectious diseases in Australia with 16,000 new cases reported annually and a vaccine will reduce the number of new infections. The aim of this project is to develop HCV virus like particles (VLP's) that have the potential for future development of preventative vaccine against HCV.
Enhancing Australia's Pandemic Influenza Vaccine Output By Increasing The Yeild Of Vaccine From Eggs
Funder
National Health and Medical Research Council
Funding Amount
$251,517.00
Summary
Influenza epidemics cause significant morbidity and mortality, particularly amongst the young and elderly. Unlike other vaccines, a new flu vaccine formulation needs to be prepared each year from the currently circulating strain. This involves a long process of preparing new seed vaccine stock, which is then tested, manufactured and distributed. The situation is even more complicated by the ability of different influenza strains to reassort with others. An example of current major concern is the ....Influenza epidemics cause significant morbidity and mortality, particularly amongst the young and elderly. Unlike other vaccines, a new flu vaccine formulation needs to be prepared each year from the currently circulating strain. This involves a long process of preparing new seed vaccine stock, which is then tested, manufactured and distributed. The situation is even more complicated by the ability of different influenza strains to reassort with others. An example of current major concern is the possibility of deadly avian flu viruses, such as H5N1, to gain the capacity to directly infect humans by recombining with a human strain and thereby starting a new global pandemic. When the next influenza pandemic occurs, the availability of a vaccine will be of the highest priority and early supply of vaccines will save millions of lives. Since vaccination is the only sustainable defense, we face an urgent need to have the capacity to supply large numbers of vaccine doses of influenza vaccines within a short period of time. Currently, the only way of producing flu vaccines is in eggs. The speed of vaccine supply is totally dependant on the yield of vaccine from eggs and the number of eggs that can be processed at any one time. Since there are severe constraints on the number of eggs that can be simultaneously processed, the limiting factor that can be addressed is the actual yield of vaccine per egg. The aim of this project is the develop methods that allow higher levels of vaccine virus to grow in eggs. We will take a multi-pronged approach to enhancing influenza vaccine production that are directed toward increasing the capacity of eggs to promote virus replication, as well as towards the vaccine strain to boost its ability to replicate in the egg. The outcome will be an enhanced capacity for vaccine manufacturers to quickly and effectively expand vaccine supplies which will directly impact on global morbidity and mortality during a flu pandemic.Read moreRead less
Roles Of The Hepatitis C Virus Glycoprotein E2 Variable Regions In Virus Entry, Immunogenicity And Immune Evasion.
Funder
National Health and Medical Research Council
Funding Amount
$682,820.00
Summary
Hepatitis C Virus infects 200 million people world-wide with over 200,000 Australians infected with the disease. This project will examine how the surface proteins of HCV change their shape to evade antibody responses and how this effects the outcome of infection. We will further characterize a vaccine that elicits protective immunity to HCV to identify the optimal formulation for clinical trials.
I am an immunologist with a background in virology and peptide chemistry and my work is therefore inter-disciplinary but focused on the design of synthetic, epitope-based vaccines against infectious agents particularly influenza and hepatitis C viruses an