Targeting The NLRP3 Inflammasome And Interleukin-18 In Hypertensive Heart Failure
Funder
National Health and Medical Research Council
Funding Amount
$1,241,115.00
Summary
Heart failure is a common complication of hypertension and a major cause of death and disability worldwide. This project will characterise a newly identified inflammatory pathway that we believe to be a major cause of the enlargement and scarring of the heart that accompanies hypertension. We will also trial drugs that block this inflammatory pathway to determine their suitability as future therapies for this devastating disease.
Investigations Of Mechanisms Underlying Autonomic Cardiovascular Regulation In Medial Temporal Lobe Epilepsy.
Funder
National Health and Medical Research Council
Funding Amount
$311,860.00
Summary
People with epilepsy often show disturbed cardiovascular function which may increase mortality risk. This may reflect seizure related disturbances in the autonomic circuitry regulation of the cardiovascular system. We apply advanced brain imaging analysis of altered neural structure, circuit connectivity and function within medial temporal lobe and mid brain, combined with clinical assessment of autonomic function to provide important new insights into cardiac disturbances in epilepsy.
Cardiac Dysfunction In Diabetes: A Novel Therapeutic Approach
Funder
National Health and Medical Research Council
Summary
Diabetes is a global epidemic with high mortality associated with heart failure. I propose a new hypothesis: diabetic heart failure reflects a progressive decline in heart pump efficiency due to an accumulation of large glycogen stores in heart muscle cells. This research aims to characterise the underlying causes of heart failure in diabetes and identify intervention potential to rescue function and prevent the progression into failure.
A Fully Implantable Self Powered Extra Aortic Counterpulsation Device? For Translational Development In Hypertensive Heart Failure
Funder
National Health and Medical Research Council
Funding Amount
$901,586.00
Summary
The development of a low cost self-powered cardiac aortic assist device to improve blood flow to the heart and rest of the body. The device is placed on the external surface of the large blood vessel (aorta) leaving the heart and provides gentle counterpulsation to improve blood flow. This aortic cardiac assist device is a therapeutic treatment for early stage heart failure.
Substrate Mapping And Ablation Of Ventricular Tachycardia
Funder
National Health and Medical Research Council
Funding Amount
$444,129.00
Summary
Sudden death is a tragic occurrence and can afflict Australians of all ages, racial and ethnic backgrounds. This research will aim to understand abnormalities in the heart muscle that cause dangerous heart rhythm abnormalities, which is the most common cause of sudden death. We will study ways to improve the technology of keyhole cardiac procedures so that it can be used to prevent these arrhythmias from occurring in the first place, and in improving the chance of long-term successful cure.
Preclinical Relaxin Therapy To Reverse Cardiac Fibrosis And Gain Functional Benefits
Funder
National Health and Medical Research Council
Funding Amount
$724,754.00
Summary
Cardiac fibrosis is a key factor promoting heart disease and onset of complications including arrhythmias and heart failure. There is urgent and unmet need of drugs that can reverse fibrosis. By documenting anti-fibrotic action of a peptide hormone relaxin, CIA and his team will test therapeutic effect of relaxin in heart disease models focusing on fibrosis-reversal and functional gain, particularly arrhythmias. This work would promote development of relaxin as a new cardiovascular drug.
Cardiac Dysfunction In Advanced Liver Disease And After Liver Transplantation
Funder
National Health and Medical Research Council
Funding Amount
$128,224.00
Summary
Heart disease is the leading cause of early death after liver transplantation (LT). The scarcity of donor organs means that LT is a limited and valuable resource. We propose screening for heart disease before LT by CT scanning of heart arteries and heart function on stress testing to improve detection of coronary heart disease (CHD). Follow-up CT scans will also assess if LT causes progression of CHD. These studies will aid in development of personalised treatment strategies to improve outcomes.
THE ROLE OF DIFFUSE MYOCARDIAL FIBROSIS IN MYOCARDIAL STIFFNESS
Funder
National Health and Medical Research Council
Funding Amount
$545,126.00
Summary
In many cardiac diseases stiffening of the heart can occur, resulting in worsening symptoms of breathlessness, fatigue and even death. Whilst the exact cause of heart stiffening is not well known, fibrosis of the heart is believed to of prime importance. This research will examine the contribution of fibrosis to heart stiffening, using cardiac magnetic resonance imaging (CMR) as a non-invasive means of assessing heart fibrosis.
How Does Oxygen Regulate Ca2+ Channel Function In Cardiac Myocytes?
Funder
National Health and Medical Research Council
Funding Amount
$475,517.00
Summary
Oxygen occupies a key role in cellular metabolism and function. Oxygen delivery to cells is critical and lack of oxygen such as occurs during a heart attack can be lethal. Death occurs commonly by induction of arrhythmia or a disturbance in the heart beat. The abnormal heart beat cannot enable the heart to pump blood efficiently and vital organs are then deprived.Exactly how arrhythmia is induced is not understood. The normal heart beat occurs as a result of propogation of electrical signals thr ....Oxygen occupies a key role in cellular metabolism and function. Oxygen delivery to cells is critical and lack of oxygen such as occurs during a heart attack can be lethal. Death occurs commonly by induction of arrhythmia or a disturbance in the heart beat. The abnormal heart beat cannot enable the heart to pump blood efficiently and vital organs are then deprived.Exactly how arrhythmia is induced is not understood. The normal heart beat occurs as a result of propogation of electrical signals through heart muscle cells. The electrical activity is generated and sustained by movement of salts or ions through membrane proteins known as ion channels. One of these channels, the L-type calcium channel plays a vital role in cardiac excitation and contraction. A reduction in oxygen alters the function of the L-type calcium channel. However, the exact mechanism for this is uncertain. An oxygen sensing mechanism in the cell is responsible for the regulation of channel function during hypoxia. The exact identity of the oxygen sensor is currently the centre of debate. Four hypotheses have been proposed. This proposal aims to examine in detail the four hypotheses of oxygen sensing to definitively determine the identity of the oxygen sensor. This information should increase our understanding of how calcium channels function during stressful conditions such as during a heart attack.Read moreRead less