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Chronic Active Viral Persistence Versus Host Immune Mediated Pathology: An Analysis And Manipulation Of The Balance.
Funder
National Health and Medical Research Council
Funding Amount
$418,658.00
Summary
Our robust ability to mount an immune response and clear infections is tempered by the possibility of promoting autoimmunity. Several host genes regulate immunity. Viruses like HIV have exploited these to abrogate antiviral immunity. This project attempts to define host factors that promote chronic infection. This will be extremely valuable in understanding the vulnerabilities of our immune system and provide an insight into how we can treat chronic infections.
Characterisation Of Anti-HBs Responses In Patients Undergoing Functional Hepatitis B Cure: Implication For Future Therapies
Funder
National Health and Medical Research Council
Funding Amount
$723,649.00
Summary
The hepatitis B virus causes liver cirrhosis and liver cancer. There is no cure for hepatitis B. However, a small number of patients can naturally rid themselves of the virus. We have identified 14 of these individuals and discovered that they have a unique immune response that is responsible for these “natural” cures. We plan to characterise this immune response and turn it into a therapeutic vaccine which can be used to cure patients who are still chronically infected.
Worldwide >360 million people have chronic hepatitis B virus (HBV) infection that imparts a 25% lifetime risk of death due to serious liver disease. Current therapies for chronic HBV reduce levels of virus replication but fail to target the stable, nuclear episome, covalently closed circular DNA (cccDNA). The current study will determine what is required to eliminate cccDNA and how current therapies for chronic HBV infection should be modified to achieve this aim.
Investigating The Host Determinants Of Viral Clearance Versus Collateral Pathology In Chronic Infection
Funder
National Health and Medical Research Council
Funding Amount
$1,250,756.00
Summary
Hepatitis B virus has infected over 2 billion people. Some people control the virus but it remains incurable and there is a lifelong risk of liver cancer. Understanding how host cells interact with the virus, the mechanisms the cells use in an attempt to eliminate the virus and the mechanisms the virus uses to sabotage these responses, will provide insights that could lead to therapies. Potential therapies could be applicable to other infections like HIV-1 and tuberculosis.
Towards A Functional Cure For HBV: Exploiting Lessons From HBV-HIV Co-infection
Funder
National Health and Medical Research Council
Funding Amount
$913,551.00
Summary
Hepatitis B virus (HBV) infection can be treated, but therapy is usually lifelong and has side effects, so a cure for HBV is very important. We work closely with colleagues in Asia where both HBV and HIV are common so this provides a unique opportunity to study HBV. We will investigate how an effective immune response against the 2 main HBV proteins is developed. If we can understand how the immune response works against HBV, this could be used to develop new therapies to develop a cure for HBV
Determinants Of Sustained Virological Response After Discontinuation Of Long-term Nucleoside Analogue Therapy In Chronic Hepatitis B Patients
Funder
National Health and Medical Research Council
Funding Amount
$976,778.00
Summary
Guidelines currently recommend lifelong treatment for patients with chronic hepatitis B, with associated cost and risks of drug resistance and side effects. It has recently been suggested that up to 50% of patients may safely and successfully stop drug after long-term treatment. Our project will identify which patients can safely stop treatment, by performing detailed studies of the human immune system and the hepatitis B virus. This will be an important advance for patient care.
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.
A Novel Hepatitis B Virus Genotype In Indigenous Australians: Impact On Vaccine Efficacy And Clinical Outcomes
Funder
National Health and Medical Research Council
Funding Amount
$1,100,960.00
Summary
We have recently identified a novel Hepatitis B virus (HBV) genotype (C4) circulating in Northern Territory (NT) Indigenous communities. Concurrently, epidemiological studies suggest that the HBV vaccine may not be working well and that there are high rates of liver cancer due to HBV in these communities. Our project will determine if HBV/C4 is linked to poor vaccine responses and accelerated liver disease, with implications for HBV vaccine strategy and clinical management of HBV/C4 infections.
Novel Early Detection Strategy For Liver Cancer Using Hepatitis B Splice Variants To Expediate Diagnosis And Improve Treatment Outcome
Funder
National Health and Medical Research Council
Funding Amount
$943,566.00
Summary
Hepatitis B virus (HBV) causes liver cancer, which is one of the only cancers that is increasing in prevalence. We have shown that smaller versions of HBV, termed splice variants, are even more strongly associated with liver cancer- people with higher levels of the splice variants were over 3 times more likely to have liver cancer. We will find out why, by thoroughly studying how the splice variants alter the virus and the host cell to promote liver cancer.
Construction And Immunogenic Evaluation Of Hepatitis B Virus Like Particles Expressing T And B Cell Epitopes Of Streptococcus Pneumoniae For The Prevention Of Hepatitis B And Pneumococcal Mediated Otitis Media In Australian Indigenous Children.
Funder
National Health and Medical Research Council
Funding Amount
$500,637.00
Summary
Australian Indigenous children suffer abormally high levels of middle ear infections (term otitis media). In many cases the infections become chronic and have a severe dischage. We propose to make a novel vaccine that will protect these children against a major bacterial cause of the ear infection as well as against hepatitis B virus infection as well.