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Mechanisms Of Nedd4/Nedd4-2-mediated Regulation Of The Epithelial Sodium Channel
Funder
National Health and Medical Research Council
Funding Amount
$471,000.00
Summary
The epithelial sodium channel (ENaC) is a highly specific ion channel expressed in the apical membrane of some tissues. In the kidney, ENaC activity is responsible for maintaining sodium balance, blood volume and blood pressure. In the lung ENaC function is required for fluid clearance. Abnormal regulation of ENaC is associated with conditions such as hypertension, cystic fibrosis and pulmonary oedema. Delineating the molecular basis of the regulation of ENaC is vital in understanding disease me ....The epithelial sodium channel (ENaC) is a highly specific ion channel expressed in the apical membrane of some tissues. In the kidney, ENaC activity is responsible for maintaining sodium balance, blood volume and blood pressure. In the lung ENaC function is required for fluid clearance. Abnormal regulation of ENaC is associated with conditions such as hypertension, cystic fibrosis and pulmonary oedema. Delineating the molecular basis of the regulation of ENaC is vital in understanding disease mechanisms and in defining targets for novel therapeutics for the treatment of disorders that arise due to sodium imbalance. Furthermore, ENaC and the molecules involved in the channel regulatory cascade are potential candidate genes in defining the genetic causes of human hypertension and salt wasting disorders. Previous studies from our laboratories and by other groups have shown that Nedd4 and Nedd4-2 proteins are key players in regulating ENaC activity. Our recent NHMRC supported work has identified another important protein, Grk2, as a regulator of ENaC. The work proposed in this application is an extension of our recent findings and will enable us to fully define how Nedd4-Nedd4-2 and Grk2 regulate the activity of ENaC.Read moreRead less
Structural And Drug Discovery Studies Of Oxidative Stress Regulator, Thioredoxin-interacting Protein
Funder
National Health and Medical Research Council
Funding Amount
$288,210.00
Summary
Toxic oxygen molecules known as Reactive Oxygen Species (ROS) are by-product of normal metabolism. The excess of ROS is damaging and is well known to contribute to ageing process and age-related diseases such as cancer, diabetic complications, immune-system decline, and cardiovascular conditions to name a few. The human body possesses several defense systems that protect us from the excess of ROS maintaining a healthy level of ROS. A down-regulator of one of this systems, a protein called TXNIP, ....Toxic oxygen molecules known as Reactive Oxygen Species (ROS) are by-product of normal metabolism. The excess of ROS is damaging and is well known to contribute to ageing process and age-related diseases such as cancer, diabetic complications, immune-system decline, and cardiovascular conditions to name a few. The human body possesses several defense systems that protect us from the excess of ROS maintaining a healthy level of ROS. A down-regulator of one of this systems, a protein called TXNIP, has been recently discovered. The amount of TXNIP is increased in such conditions as high glucose, a first sign of diabetes, and under ischemia, a shortage of blood supply occurring during heart attack. This weakens the anti-oxidant defense systems and makes the organism more vulnerable to ROS exposure. Our team of researchers embarked on structural and functional studies of TXNIP with the purpose to identify small molecules that can interfere with the undesirable action of TXNIP. These molecules might become useful therapeutic agents to counteract weakening organism's ROS defense system caused by TXNIP in many disease conditions such as, cancer, diabetes and cardiac failure.Read moreRead less
The Regulation Of Gene Expression During Adipogenesis
Funder
National Health and Medical Research Council
Funding Amount
$549,446.00
Summary
The body stores energy acquired from ingested food as fat droplets within storage cells termed adipocytes. The amount of fat varies between individuals and may also vary during an individual's life. The variations reflect differences in physiology, diet, and behaviour and have been the focus of intense study. Excessive accumulation of fat is a serious health problem as it is associated with conditions such as heart disease and diabetes. This grant application primarily concerns using a new line ....The body stores energy acquired from ingested food as fat droplets within storage cells termed adipocytes. The amount of fat varies between individuals and may also vary during an individual's life. The variations reflect differences in physiology, diet, and behaviour and have been the focus of intense study. Excessive accumulation of fat is a serious health problem as it is associated with conditions such as heart disease and diabetes. This grant application primarily concerns using a new line of genetically modified mice that have reduced fat. These mice lack a key gene regulatory protein that is implicated in fat accummulation and adipocyte formation. It is expected that a knowledge of the genes regulating the formation and function of fat storage cells will contribute to new strategies for controlling fat formation and will help in the prevention of diseases such as diabetes and heart disease.Read moreRead less
The Regulation Of Apolipoprotein E Secretion By Human Macrophages
Funder
National Health and Medical Research Council
Funding Amount
$516,078.00
Summary
One of the major inflammatory cells in the body, the macrophage, is involved in a number of diseases, including coronary disease. ApoE is made and released by macrophages and appears to protect against the inflammation of coronary disease and may affect other conditions, including Alzheimer's disease. We have discovered pathways regulating the production and release of apoE by macrophages, and in this project will study these pathways in great detail. By controlling the production of this import ....One of the major inflammatory cells in the body, the macrophage, is involved in a number of diseases, including coronary disease. ApoE is made and released by macrophages and appears to protect against the inflammation of coronary disease and may affect other conditions, including Alzheimer's disease. We have discovered pathways regulating the production and release of apoE by macrophages, and in this project will study these pathways in great detail. By controlling the production of this important molecule we may reduce our risk of heart disease, and may be able to treat a range of inflammatory conditions which currently untreatable.Read moreRead less
Biophysical characterization of protein interactions within a transcription factor network. Gene expression is regulated in part by interactions between pairs and groups of proteins known as transcription factors and co-regulators. These proteins assemble into complexes at gene promoters and enhancers and thereby control the expression of that gene. Little is known at the molecular level of how these complexes form and how different interactions cooperate or compete with each other. In this prop ....Biophysical characterization of protein interactions within a transcription factor network. Gene expression is regulated in part by interactions between pairs and groups of proteins known as transcription factors and co-regulators. These proteins assemble into complexes at gene promoters and enhancers and thereby control the expression of that gene. Little is known at the molecular level of how these complexes form and how different interactions cooperate or compete with each other. In this proposal we aim to define a complex between two transcriptional regulators (HOP and SRF) involved in cardiac development and to begin to define other interactions that make up a transcriptional network essential for development of a normal heart.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0883032
Funder
Australian Research Council
Funding Amount
$1,300,000.00
Summary
800 MHz NMR spectrometer for biomolecular structure-function analysis. An understanding of how organisms function at the molecular level is central to developing the ability to fight many diseases in a rational way. This equipment will provide the capability for many different laboratories around NSW and the ACT to advance our knowledge at this fundamental level, primarily by examining the structures and functions of biomolecules such as proteins.
Heparan sulfate complexes with VEGF for control of angiogenesis in tissue engineered constructs. The national/community benefits that will arise from this work include, the generation of knowledge related to the growth of blood vessels in the presence of a synthetic polymer that has been made to look like the natural polymers present in the body. This will lead to an understanding of the underlying mechanisms involved that may have down stream effects relevant to the replacement of many types o ....Heparan sulfate complexes with VEGF for control of angiogenesis in tissue engineered constructs. The national/community benefits that will arise from this work include, the generation of knowledge related to the growth of blood vessels in the presence of a synthetic polymer that has been made to look like the natural polymers present in the body. This will lead to an understanding of the underlying mechanisms involved that may have down stream effects relevant to the replacement of many types of tissues being generated for clinical applications, including possible applications in the treatment of heart disease, the largest killer of people in the Western world. Read moreRead less