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Investigating The Mechanisms That Increase Nerve-evoked Vasoconstriction Following Spinal Cord Injury
Funder
National Health and Medical Research Council
Funding Amount
$372,547.00
Summary
People with spinal cord injury not only lose control of their arms and legs but also lose control of their bladder and bowel. They also have poor control of blood pressure and an overfull bladder or bowel can lead to dangerously high blood pressure. In this project, we are investigating how this abnormal high blood pressure is generated. The aim is to develop treatments which target the mechanisms which increase the blood pressure responses elicited by the bladder and bowel.
Central Mechanisms Underlying Obesity Related Hypertension.
Funder
National Health and Medical Research Council
Funding Amount
$311,860.00
Summary
The prevalence of obesity and related disease are rising rapidly worldwide. Adult risk factors, genetic predisposition and socioeconomic factors all contribute to obesity and obesity related hypertension however there is compelling evidence that the early life environment also contributes to disease progression. In this regard, an understanding of how increased sympathetic activity occurs in programmed hypertension is required in order to develop effective therapeutic strategies.
Reduction Of The Cardiovascular Response Of Psychological Stress Through Blockade Of Orexin’s Action On One Of Its Receptors.
Funder
National Health and Medical Research Council
Funding Amount
$394,925.00
Summary
Anxiety, fear of challenges, frustration are part of modern life stressors. Our body reacts to these stressors by increasing blood pressure and heart rate, which in turn can harm our cardiovascular system and precipitate cardiovascular accidents. In this project we test a new class of drugs that act on a neurochemical system implicated in these particular responses. If our hypothesis is correct, one of these drugs could be used to relax the cardiovascular system and protect it in times of stress ....Anxiety, fear of challenges, frustration are part of modern life stressors. Our body reacts to these stressors by increasing blood pressure and heart rate, which in turn can harm our cardiovascular system and precipitate cardiovascular accidents. In this project we test a new class of drugs that act on a neurochemical system implicated in these particular responses. If our hypothesis is correct, one of these drugs could be used to relax the cardiovascular system and protect it in times of stress.Read moreRead less
Novel computational tools for the analysis of sympathetic nervous system activity. This project will investigate electrical signals from the heart, resulting in novel tools for the assessment of sympathetic nervous system activity. The findings will contribute to advancing Australia's international leading position in health technology and improve community health.
Discovery Early Career Researcher Award - Grant ID: DE130100537
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
Neural regulation of immunity following brain injury. Following a brain injury, the brain tries to protect itself by blocking all inflammation. However, this renders the host with impaired immunity and increased risks to infections. The project aims to delineate the mechanisms behind this response, with the expected outcome of highlighting the important interplay between the nervous and immune system.
Sympathetic Nervous System Activation In Renal Failure. Its Contribution To Pathogenesis And Progression.
Funder
National Health and Medical Research Council
Funding Amount
$490,796.00
Summary
Cardiovascular morbidity and mortality is exceedingly high in patients with chronic renal failure and particularly end stage renal disease. Recent studies suggest that sympathetic activation contributes substantially to the development of hypertension, progression of renal disease and cardiovascular prognosis in these patients. Increased sympathetic nerve firing has been demonstrated in end stage renal disease by the use of clinical microneurography, which has been attributed to uremia-related t ....Cardiovascular morbidity and mortality is exceedingly high in patients with chronic renal failure and particularly end stage renal disease. Recent studies suggest that sympathetic activation contributes substantially to the development of hypertension, progression of renal disease and cardiovascular prognosis in these patients. Increased sympathetic nerve firing has been demonstrated in end stage renal disease by the use of clinical microneurography, which has been attributed to uremia-related toxins. However, renal transplant recipients with excellent graft function and no signs of uremia still exhibit increased sympathetic nerve firing. Most interestingly, bilateral nephrectomized patients have nerve firing rates comparable to that of normal control subjects without renal disease. These data suggest that the diseased kidneys exert excitatory effects on the sympathetic nervous system independent of correction of uremia. The proposed study aims to comprehensively investigate the pattern of sympathetic activation both centrally (microneurography) and regionally (radiotracer dilution methodology) in patients with chronic renal failure and end stage renal disease . The effect of the centrally acting sympatholytic drug rilmenidine on sympathetic activity in the setting of renal disease will be assessed. Patients with ESRD waitlisted for kidney transplantation will be studied before and after transplantation. Some of the transplant recipients will also have undergone uni- or bilateral nephrectomy before transplantation which will enable us to further explore the role of the diseased kidneys in sympathetic activation. The results of this study may prove to have significant implications for treatment and prevention of cardiovascular morbid events frequently associated with renal disease.Read moreRead less
Role Of The Medial Amygdala In Developing Neurogenic Hypertension
Funder
National Health and Medical Research Council
Funding Amount
$302,123.00
Summary
We aim to investigate the underlying mechanisms and pathways that regulate the activity of neurons located in the medial amgydala during stress that contribute long term to the development of hypertension. This study is highly relevant to people who inappropriately respond to typical daily stressors and we aim to provide direction for developing specific therapies to interrupt the adverse cardiovascular consequences of chronic stress.
How Does The Central Respiratory Generator Amplify Sympathetic Activity In Hypertension?
Funder
National Health and Medical Research Council
Funding Amount
$290,113.00
Summary
High blood pressure causes many life-threatening cardiovascular diseases, including heart failure and stroke. The cause of most high blood pressure is not known. Using an animal model of high blood pressure we have shown that an interaction, in the brain, between the nerve pathways that generate respiratory activity and regulate blood pressure is altered. This occurs early in life and our evidence strongly suggests this may be a cause of high blood pressure.
Respiratory Modulation Of RVLM Premotor Neurons: Role In The Sympathetic Over-activity Of Hypertension.
Funder
National Health and Medical Research Council
Funding Amount
$338,605.00
Summary
Hypertension is a common health disorder in all societies and is a major risk factor for the development of life threatening cardiovascular diseases, including heart failure and stroke. Whilst some effective therapies are available, many patients are not adequately treated or have reduced quality of life due to serious side effects. There is a great need for alternative therapies. The central nervous system is clearly involved in hypertension although the level of that involvement is not well un ....Hypertension is a common health disorder in all societies and is a major risk factor for the development of life threatening cardiovascular diseases, including heart failure and stroke. Whilst some effective therapies are available, many patients are not adequately treated or have reduced quality of life due to serious side effects. There is a great need for alternative therapies. The central nervous system is clearly involved in hypertension although the level of that involvement is not well understood- i.e. is it a causal factor or just a contributor to the maintenance of established hypertension? The experiments outlined in this application are based on the observation that modulation of nervous activity to blood vessels is more influenced by the respiratory system in people with high blood pressure, than in normotensive people. We aim to test whether this increased respiratory modulation might be involved in the generation of the high blood pressure.Read moreRead less