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Role Of Calcium Channels And Small-conductance Potassium Channels In Myenteric Neurons
Funder
National Health and Medical Research Council
Funding Amount
$131,717.00
Summary
This proposal will investigate the electrical properties of neurons in the wall of the intestine that control movements of the bowel. These neurons form an extensive network that runs the length of the gastrointestinal tract and control mixing and propulsion of food along the intestine. We will determine the basic electrical properties of these neurons and investigate why some of them transmit signals in a continuous manner while others transmit signals intermittently and how these patterns of a ....This proposal will investigate the electrical properties of neurons in the wall of the intestine that control movements of the bowel. These neurons form an extensive network that runs the length of the gastrointestinal tract and control mixing and propulsion of food along the intestine. We will determine the basic electrical properties of these neurons and investigate why some of them transmit signals in a continuous manner while others transmit signals intermittently and how these patterns of activity fit into the overall activity of the gut. This study will build on a large body of data obtained from our laboratory that has shown that some of these neurons act as sensors of the presence-absence of food in the intestine while others send signals to the muscle in the wall of the intestine to either relax or contract it so that the food can be processed properly. By knowing what makes these neurons different from each other we will be able to understand what goes wrong in functional bowel disorders where motility is affected, resulting in pain and discomfort.Read moreRead less
The primary aim of my research has been to understand how biological ion channels work. All electrical activities in the nervous system, including communication between cells and influences of hormones and drugs on cell function, are regulated by the opening and closing of ion channels. Thus, understanding how these ion channels operate will ultimately help us find the causes of, and possibly cures for, many neurological, muscular and cardiac disorders.
Dynamic Action Potential Clamp Studies Of Drugs That Affect The Cardiac Action Potential
Funder
National Health and Medical Research Council
Funding Amount
$343,976.00
Summary
The development of drugs to treat and.or prevent cardiac arrhythmias have been plagued by the side-effect of actually increasing the risk of sudden death. One of the reasons for this is that drugs that work well in one part of the heart may cause problems in another part. We are developing a system called “dynamic action potential clamp” that will make it easier for researchers to assess the effect of drugs in different regions of both normal and diseased hearts.
Role Of Calcium-activated Potassium Channels In Neuronal Excitability, Synaptic Plasticity And Sensory Processing
Funder
National Health and Medical Research Council
Funding Amount
$612,272.00
Summary
Disturbances in brain function, as occur in diseases such as epilepsy and schizophrenia, are associated with abnormal electrical activity. This electrical activity leads to increases in calcium inside nerve cells. In this project we plan to investigate how changes in calcium inside nerve cells regulates electrical activity, and how this impacts on the capacity of the brain to process and learn new information.
Anthracyclines Disrupt Ca2+ Signalling In Cardiomyocytes: A Contribution To Cardiac Toxicity
Funder
National Health and Medical Research Council
Funding Amount
$525,620.00
Summary
Anthracyclines are one of the most effective drugs used in chemotherapy, but cause side effects resulting in serious heart problems which can be fatal. The link between anthracycline therapy and the problems they cause in the heart is not fully defined. We will investigate mechanisms leading to these side effects and define specific targets of anthracyclines in the heart. It is hoped this will lead to the design of new drugs which counteract the side effects of anthracycline treatment.
How Does Sudden Cardiac Death Occur In Familial Hypertrophic Cardiomyopathy?
Funder
National Health and Medical Research Council
Funding Amount
$1,312,606.00
Summary
Familial hypertrophic cardiomyopathy is a leading cause of sudden cardiac death but the mechanisms for the induction of arrhythmia are unknown. This proposal has the potential to impact sudden death in the young and enable significant expansion of Australia’s research capacity into the treatment of familial hypertrophic heart disease in humans.
Failure-to-progress In Human Labour Results From A Profound Electrical Negativity Of The Uterine Cells: Targeting The Ion Channels Involved
Funder
National Health and Medical Research Council
Funding Amount
$564,541.00
Summary
The incidence of failure to progress in labour has increased in recent years, being linked to the rise in obesity. The result is a significant escalation in the rate of delivery by Caesarean Section (CS) which increases the risk of serious complications during subsequent pregnancies. We have identified dysfunctional systems associated with poor uterine contraction. We now aim to determine the mechanisms underlying these dysfunctional systems to lay the foundations for better therapeutics.