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Role Of Plasmepsin V And PTEX Complex In Plasmodium Liver Infection
Funder
National Health and Medical Research Council
Funding Amount
$848,408.00
Summary
Plasmepsin V and PTEX are essential proteins for malaria parasites to grow inside red blood cells. These proteins control the export of parasite proteins into red cells, causing disease. Before red blood cells are infected, parasites invade liver cells. Plasmepsin V and PTEX are expressed during liver infection but their function is currently unknown. We hypothesise that they allow parasites to export proteins into liver cells in order to survive and, thus, are antimalarial drug targets.
Identifying Metabolic Pathways In Leishmania Parasites And Their Host Cells Required For Virulence
Funder
National Health and Medical Research Council
Funding Amount
$989,110.00
Summary
Our lack of understanding of microbial metabolism in infected animal tissues has hindered the development of effective therapies. This is particularly true for many parasitic diseases, including Leishmania spp that cause devastating disease throughout the tropics. We will utilize a range of innovative analytical and genetic approaches to identify metabolic pathway in Leishmania parasites and infected host cells that are required for virulence and are potential drug targets.
Interdisciplinary Insights Into The Rational Design Of Malaria Therapy And Vaccines
Funder
National Health and Medical Research Council
Funding Amount
$318,768.00
Summary
Malaria is a global health concern with almost half a million deaths annually. There is an urgent need for a highly effective malaria vaccine and new antimalarials. However, despite decades of research into this pathogen, our understanding of what causes illness in a person and how immunity operates is limited. This project will use a mathematical modelling approach to provide a new way to understand infection, as a rapidly changing and intricate process.
Plasmodium vivax is a parasite that invades the youngest of human red blood cells. Our work will reveal how this malaria parasite enters our blood cells and the molecular mechanisms that allows successful invasion. This proposal will redefine our understanding of P. vivax invasion and explore novel ways to block its entry into red blood cells and therefore prevent malaria infection.
Transport Pathways Of Host-derived Iron In Schistosomes Parasites
Funder
National Health and Medical Research Council
Funding Amount
$322,091.00
Summary
This project will identify the diversity and biological roles of receptors for metabolic iron expressed on the body surface of the parasitic blood flukes (schistosomes) of humans. Schistosomes are a major health problem in many tropical countries and are responsible for significant human morbidity and lost productivity. Adult worms feed on human blood, from which derive amino acids for the production of many hundreds of eggs released per day into the human blood stream. The intense cellular resp ....This project will identify the diversity and biological roles of receptors for metabolic iron expressed on the body surface of the parasitic blood flukes (schistosomes) of humans. Schistosomes are a major health problem in many tropical countries and are responsible for significant human morbidity and lost productivity. Adult worms feed on human blood, from which derive amino acids for the production of many hundreds of eggs released per day into the human blood stream. The intense cellular response induced by parasite eggs trapped in body organs is the major cause of chronic human disease. We have discovered two intriguing phenomena of iron metabolism in schistosomes. Firstly, schistosomes have a greater reliance on iron than many other organisms, storing a surfeit in cells that produce the protein-rich egg shell. Secondly, a major transmembrane iron transporter of the parasites, thought to be involved in the uptake of iron, is found on the parasite external body surface and not in the parasite intestine. The extensive nutritional dependence of these worms on iron and the surface location of mediators of iron uptake raise the exciting possibility that we have uncovered a novel system that might be exploited for vaccine or drug-mediated control of these significant human parasites. If we can dissect the pathways schistosomes use to derive iron from their hosts, we may be able to generate vaccines to block this nutritional pathway, or use drugs to block embryogenesis. This project is a fact-finding mission that asks if the host-interactive tegument of these parasites is a major source of metabolic iron. Molecules we demonstrate to be present on the surface will be tested as vaccine candidates in mouse vaccine trialsRead moreRead less
Elimination Of Zoonotic Schistosomiasis And Echinococcosis Through Integrated Morbidity Control
Funder
National Health and Medical Research Council
Funding Amount
$898,008.00
Summary
I am a parasitologist researching the biology, immunology and epidemiology of human parasitic worms, particularly the schistosome bloodflukes and the hydatid tapeworms, which cause bilharzia and hydatidosis, diseases of the world’s poorest people that cause both major suffering and economic loss. My goal is to develop new methods, including vaccination, to control and eventually eliminate these parasites.
Immunological Prevention Of Cysticercosis And Hydatid Disease
Funder
National Health and Medical Research Council
Funding Amount
$510,000.00
Summary
Cysticercosis and hydatid disease are caused by infections with the larval stages of tapeworm parasites. These infections cause substantial morbidity and mortality throughout the world, but particularly in developing countries. They are zoonotic diseases, being transmitted to humans from animals. This project aims to develop practical vaccines to assist with the prevention of both cysticercosis and hydatid disease in humans. The vaccines will be used in the parasites' natural animal hosts, there ....Cysticercosis and hydatid disease are caused by infections with the larval stages of tapeworm parasites. These infections cause substantial morbidity and mortality throughout the world, but particularly in developing countries. They are zoonotic diseases, being transmitted to humans from animals. This project aims to develop practical vaccines to assist with the prevention of both cysticercosis and hydatid disease in humans. The vaccines will be used in the parasites' natural animal hosts, thereby breaking the parasite life-cycle and preventing the diseases being passed to humans. Substantial preliminary research has been undertaken by the applicant, including completion of successful preliminary vaccine trials. This project will optimise the vaccines and complete initial field trials in countries with high rates of disease transmission.Read moreRead less
Impact Of The Three Gorges Dam On Transmission And Future Control Of Human Schistosomiasis In China
Funder
National Health and Medical Research Council
Funding Amount
$1,420,135.00
Summary
A million Chinese have schistosomiasis or snail fever. When the Three Gorges Dam on the Yangtze River is fully operational, considerable environmental-ecological changes will result, increasing spread of this parasitic disease. In a unique study we will assess the impact of the Dam on schistosomiasis, and test and model a series of options for its control. The findings will be important for China and other areas where schistosomiasis occurs and where similar dams are planned or are under way.
Immunological Prevention Of Cysticercosis And Hydatid Disease
Funder
National Health and Medical Research Council
Funding Amount
$802,685.00
Summary
Professor Lightowlers’ has developed the world’s most effective vaccines against diseases caused by parasites. The vaccines prevent transmission of parasites from livestock animals to humans. During the next 5 years the vaccines will be produced on a large scale and evaluated in field trials. The products of this research program will make a major contribution to reducing the number of people suffering from parasitic cysts.