Elucidating Mechanisms For The Biological Activities Of CD46.
Funder
National Health and Medical Research Council
Funding Amount
$228,000.00
Summary
The CD46 protein enables entry into cells of a number of different pathogens, including the measles virus, Neisseria meningitidis (the major cause of meningococcal disease), Neisseria gonorrhoea, Human Herpes Virus 6, and group A streptococcus. In addition, by binding to a key blood component that is often attached to foreign pathogens, CD46 can facilitate binding and entry of other pathogens. As well as facilitating entry of the pathogen, it has recently become apparent that CD46 binding trigge ....The CD46 protein enables entry into cells of a number of different pathogens, including the measles virus, Neisseria meningitidis (the major cause of meningococcal disease), Neisseria gonorrhoea, Human Herpes Virus 6, and group A streptococcus. In addition, by binding to a key blood component that is often attached to foreign pathogens, CD46 can facilitate binding and entry of other pathogens. As well as facilitating entry of the pathogen, it has recently become apparent that CD46 binding triggers a wide range of responses from the human host. Some of these responses are likely to further facilitate survival and proliferation of the pathogen, but others are more likely to facilitate host defence. For examples, signals triggered by binding to CD46 can both abrogate some aspects of the immune response (and it is though that this immunosuppression contributes to the secondary infections that cause the death of nearly one million children each year) and facilitate other aspects of the immune response. By understanding the mechanisms by which CD46 triggers these complex responses, we firstly be able to dissect how important each of these processes are to the overall pathogenecity of the virus or bacteria. Furthmore, this understanding will allow us to design better vaccines and drugs to combat these diseases.Read moreRead less
Development Of Improved Vaccine Strategies For Measles Using Plant-derived Edible Vaccines
Funder
National Health and Medical Research Council
Funding Amount
$331,980.00
Summary
Measles is a highly contagious viral disease that is contracted via the respiratory tract. Severe infection may lead to complications such as otitis media, pneumonia, encephalitis. Despite our current vaccination strategy outbreaks still occur in Australia and measles is a major problem in developing countries. In developing nations the case fatality rate of measles is several hundred times that of developed nations. Over 800,000 children still die each year due to measles. Problems with the cur ....Measles is a highly contagious viral disease that is contracted via the respiratory tract. Severe infection may lead to complications such as otitis media, pneumonia, encephalitis. Despite our current vaccination strategy outbreaks still occur in Australia and measles is a major problem in developing countries. In developing nations the case fatality rate of measles is several hundred times that of developed nations. Over 800,000 children still die each year due to measles. Problems with the current vaccination strategy are: a) doesn't work in children less than 1 year of age, b) must be kept cold c) must be given by injection. We believe that a plant derived edible vaccine for measles will address the limitations of currently available vaccine i.e. we can give it children under the age of 1 year, it can be eaten and doesn't have to be kept cold.Read moreRead less
Roles Of Virus-integrin Interactions And Rotavirus Modulation Of Host Cell Responses In Viral Pathogenesis
Funder
National Health and Medical Research Council
Funding Amount
$474,000.00
Summary
Rotaviruses are the main cause of severe gastroenteritis in children, and cause 1 in 27 Australian children under the age of 5 years to spend time in hospital. There is currently no rotavirus vaccine available. We aim to discover how rotavirus interacts with host cells. This information is necessary to formulate a safe and effective vaccine, or a therapeutic agent that can block virus growth in host cells. Previously, we showed that rotavirus attaches to cells and enters them using several membe ....Rotaviruses are the main cause of severe gastroenteritis in children, and cause 1 in 27 Australian children under the age of 5 years to spend time in hospital. There is currently no rotavirus vaccine available. We aim to discover how rotavirus interacts with host cells. This information is necessary to formulate a safe and effective vaccine, or a therapeutic agent that can block virus growth in host cells. Previously, we showed that rotavirus attaches to cells and enters them using several members of the integrin protein family that are present on the surface of the cells. Integrins are critical for cell adhesion, survival and communication. In this project, we will identify how rotavirus usage of integrins modulates cell functions. This will help us understand how rotavirus causes disease, how virus spreads in the body and how the immune response defends us from rotavirus. Rotavirus binds integrins using particular stretches of protein sequence that we have shown are also present in other human viral pathogens that cause hepatitis, AIDS and measles. We will determine if these other viruses also recognize integrins.Read moreRead less