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Regulation Of Nuclear Calcium Concentration In The Life Or Death Of Cells
Funder
National Health and Medical Research Council
Funding Amount
$195,047.00
Summary
The nucleus is the most prominent of all cell organelles and contains the primary genetic material for cellular development and growth. It performs some of the most important functions in the life and death of all living cells. However, little is known about many of the regulatory signals and events that control nuclear function. We will use new genetically-encoded sensor molecules that a living cell can be instructed to produce at various internal locations to explore important features of cell ....The nucleus is the most prominent of all cell organelles and contains the primary genetic material for cellular development and growth. It performs some of the most important functions in the life and death of all living cells. However, little is known about many of the regulatory signals and events that control nuclear function. We will use new genetically-encoded sensor molecules that a living cell can be instructed to produce at various internal locations to explore important features of cell control. This study will look specifically at how changes in the concentration of ionised Ca2+ in the nucleus control the switching on of genes and the initiation of programmed cell death pathways. This information is of significance to our understanding of normal cell growth and development, as well as abnormal growth (e.g. cancer).Read moreRead less
Modulating The Skin Immune System With Physical Stimulus
Funder
National Health and Medical Research Council
Funding Amount
$425,353.00
Summary
The Fellowship will be based between Uni QLD and Massachusetts General Hospital, Harvard Medical School. It will consist of pre-clinical development and validation of an in vivo optical micro-manipulation system for laser-guided extraction of cells. A comparable system will then be developed for characterization of leukocytes in healthy and diseased human skin. The long term outcomes will be better characterisation of inflammatory skin disease resulting in new targets and therapeutic strategies.
Investigation Of Lipid-protein Interactions Of Mechanosensitive Ion Channels
Funder
National Health and Medical Research Council
Funding Amount
$409,785.00
Summary
Living organisms are imminently exposed to mechanical stimuli such as gravity, touch or sound. Sensing mechanical stimuli is therefore crucial for survival. One biological tool for sensing mechanical stress are the mechanosensitive ion channels that open in response to tension in cell membranes. We will study the interactions and coupling between membrane lipids and mechanosensitive ion channels. These interactions are essential for the function of these fascinating sensory biological molecules.
Use Of Novel Transfection Protocols To Study Protein Trafficking In Malaria-infected Erythrocytes
Funder
National Health and Medical Research Council
Funding Amount
$211,527.00
Summary
Malaria kills between 1 and 3 million children each year. In addition, the disease debilitates the adult population in malaria-endemic areas, thereby contributing to the cycle of poverty in many third world countries. As resistance to existing antimalarial drugs increases, there is an urgent need to understand the workings of the parasite at a molecular level to enable the development of alternative antimalarial strategies. During part of its life cycle, the malaria parasite infects the erythroc ....Malaria kills between 1 and 3 million children each year. In addition, the disease debilitates the adult population in malaria-endemic areas, thereby contributing to the cycle of poverty in many third world countries. As resistance to existing antimalarial drugs increases, there is an urgent need to understand the workings of the parasite at a molecular level to enable the development of alternative antimalarial strategies. During part of its life cycle, the malaria parasite infects the erythrocytes of its human host. The parasite transports proteins to the erythrocyte membrane so as to modify the properties of its adopted cellular residence. The parasite proteins that are deposited at or in the erythrocyte membrane increase the leakiness and the stickiness of the parasitised erythrocytes. This allows more efficient uptake of nutrients and allows the parasitised erythrocytes to adhere to blood vessel walls, thereby avoiding passage through the spleen. Adherence of parasitised erythrocytes to capillaries in the brain is thought to lead to the development of the complication known as cerebral malaria. This complication is responsible for most of the deaths due to malaria. In order to traffic the adherence proteins to the erythrocyte surface, the parasite establishes a novel transport pathway for moving proteins across the erythrocyte cytoplasm. As the uninfected erythrocyte has no means, nor requirement, for moving proteins, this novel transport mechanism may represent a target for drugs that kill the malaria parasite without being toxic to humans. The pathways for the movement of proteins around the infected erythrocyte are largely unknown. We propose to use techniques to introduce foreign genes into malaria-infected erythrocytes to unravel the details of the molecular machinery and the ticketing system that the parasite uses to traffic proteins to their correct destinations in its adopted home.Read moreRead less
Protein Trafficking In Malaria Parasite-infected Erythrocytes
Funder
National Health and Medical Research Council
Funding Amount
$417,750.00
Summary
Malaria kills between 1 and 3 million children each year. In addition, the disease debilitates the adult population in malaria-endemic areas, thereby contributing to the cycle of poverty in many third world countries. As resistance to existing antimalarial drugs increases, there is an urgent need to understand the workings of the parasite at a molecular level to enable the development of alternative antimalarial strategies. During part of its life cycle, the malaria parasite infects the erythroc ....Malaria kills between 1 and 3 million children each year. In addition, the disease debilitates the adult population in malaria-endemic areas, thereby contributing to the cycle of poverty in many third world countries. As resistance to existing antimalarial drugs increases, there is an urgent need to understand the workings of the parasite at a molecular level to enable the development of alternative antimalarial strategies. During part of its life cycle, the malaria parasite infects the erythrocytes of its human host. The parasite transports proteins to the erythrocyte membrane so as to modify the properties of its adopted cellular residence. The parasite proteins that are deposited at or in the erythrocyte membrane increase the leakiness and the stickiness of the parasitised erythrocytes. This allows more efficient uptake of nutrients and allows the parasitised erythrocytes to adhere to blood vessel walls, thereby avoiding passage through the spleen. Adherence of parasitised erythrocytes to capillaries in the brain is thought to lead to the development of the complication known as cerebral malaria. This complication is responsible for most of the deaths due to malaria. In order to traffic the adherence proteins to the erythrocyte surface, the parasite establishes novel transport pathways for moving proteins across the erythrocyte cytoplasm. As the uninfected erythrocyte has no means, nor requirement, for moving proteins, this novel transport mechanism may represent a target for drugs that kill the malaria parasite without being toxic to humans. The pathways for the movement of proteins around the infected erythrocyte are largely unknown. We propose to use cell biology techniques and techniques to introduce foreign genes into malaria-infected erythrocytes to unravel the details of the molecular machinery and the ticketing system that the parasite uses to traffic proteins to their correct destinations in its adopted home.Read moreRead less
A Novel Patch-fluorimetry Technique For Investigating Structural Changes During Gating Of Mechanosensitive Ion Channnels
Funder
National Health and Medical Research Council
Funding Amount
$387,018.00
Summary
Membrane proteins, especially membrane channels play an important role in regulating the flow of substances across the cell. Dysfunction in these channels can lead to a variety of diseases. Thus approximately 60% of drug development is targeted against such proteins. In our research, we are looking at membrane channels found in bacteria. Understanding the function of these channels will help us develop novel anti-bacterial agents. It will also aid to understand a role of ion channels in disease.
Mechanotransduction is defined as the ability of living cells to respond to and convert mechanical stimuli into electro-chemical cellular signals to ensure survival. It is largely dependent on membrane proteins known as mechanosensitive (MS) ion channels. These channels are involved in senses of hearing and touch, and are also crucial regulators of heart and muscle function. This research aims to elucidate the general physical principles underlying mechanotransduction in living cells.
Elucidating The Mechanisms Of Action Of And Resistance To Endoperoxide Antimalarials
Funder
National Health and Medical Research Council
Funding Amount
$716,755.00
Summary
Artemisinin-based antimalarials (ARTs) save hundreds of thousands of lives every year. Unfortunately resistance of P. falciparum to ART is now emerging in South East Asia and it is critical to know how and why. We will determine what is different about resistant parasites and will develop assays to monitor drug resistance in the field. We have found that the immature form of the malaria parasite is more resistant to ARTs, which helps explain resistance. We will build on this to develop new targe ....Artemisinin-based antimalarials (ARTs) save hundreds of thousands of lives every year. Unfortunately resistance of P. falciparum to ART is now emerging in South East Asia and it is critical to know how and why. We will determine what is different about resistant parasites and will develop assays to monitor drug resistance in the field. We have found that the immature form of the malaria parasite is more resistant to ARTs, which helps explain resistance. We will build on this to develop new targetted treatments.Read moreRead less