Does Pregnancy Cause Morphological Changes In Central As Well As Peripheral Nerve Pathways That Control Blood Pressure?
Funder
National Health and Medical Research Council
Funding Amount
$382,538.00
Summary
Pregnancy changes blood pressure but the mechanism is unknown. We will use state-of-the-art anatomical methods to define how pregnancy alters nerves controlling blood pressure. We will identify changes in the information the nerve cells receive, in their shape and in the way they communicate with other blood pressure-controlling nerve cells. This information will help to develop new ways to prevent and treat pre-eclampsia, a major cause of death and disability for mothers and their newborns.
Targeting Prevention And Treatment Of Hypertensive Cardiovascular Disease
Funder
National Health and Medical Research Council
Funding Amount
$774,540.00
Summary
Hypertension, high blood pressure, is a major global health burden. It contributes to heart disease, stroke and kidney failure, and as such is a major cause of premature death worldwide. Advances in the treatment of hypertension has meant that more people are living with disabilities associated with cardiovascular disease. Our work focuses on identifying new treatments to prevent the devastating effects of hypertension on organ function to improve quality of life in men and women.
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
Sex Differences In Long-Term Outcomes Of Young Patients With Acute Myocardial Infarction
Funder
National Health and Medical Research Council
Funding Amount
$333,900.00
Summary
Young women (?55 years) are more likely to die after having a heart attack and face more difficult recoveries compared to similar aged men. However the cause of this difference is unknown. This project seeks to improve the prevention, care and longer term outcomes for young women following a heart attack. Information obtained from will provide evidence-based and actionable information for physicians to inform and manage their patients so that we may ultimately improve the lives of young women.
Sympathetic Control Of Cutaneous Blood Flow And Blood Pressure In Human Spinal Cord Injury
Funder
National Health and Medical Research Council
Funding Amount
$242,002.00
Summary
While spinal cord injury can cause devastating changes in the nervous system paralysis and loss of sensation relatively little is known about changes to the sympathetic nervous system. The sympathetic nervous system is intimately involved in the ongoing control of blood pressure, blood flow and temperature control. Loss of sympathetic control can occur following spinal cord injury. Interruption of descending pathways can result in partial or complete loss of sympathetic outflow from the thoracol ....While spinal cord injury can cause devastating changes in the nervous system paralysis and loss of sensation relatively little is known about changes to the sympathetic nervous system. The sympathetic nervous system is intimately involved in the ongoing control of blood pressure, blood flow and temperature control. Loss of sympathetic control can occur following spinal cord injury. Interruption of descending pathways can result in partial or complete loss of sympathetic outflow from the thoracolumbar segments. Complete decentralization can result in autonomic dysreflexia (autonomic hyperreflexia), in which sensory stimuli originating below the lesion evoke a reflex increase in sympathetic drive to the blood vessels, causing them to constrict. Because of this, blood pressure may rise suddenly and remain at such high levels that stroke and (occassionally) cardiac arrest may occur. This phenomenon, autonomic dysreflexia, is considered a medical emergency. The typical subjective signs of autonomic dysreflexia include a throbbing headache, tingling in the head or nasal congestion; sweating and flushing above the lesion are clinical signs that prompt medical staff to measure blood pressure and to locate the source of sensory irritation (usually a distended bladder or impacted colon, sometimes a pressure sore or ingrown toenail). Commonly, however, subclinical episodes go undetected, and this phenomenon of silent dysreflexia is of increasing concern. This project will develop means of assessing the integrity and state of the sympathetic nervous system below a lesion in patients with spinal cord injury and characterize the firing properties of reflexly activated sympathetic neurones.Read moreRead less
Investigating The Synergistic Role Of Brain-derived Neurotrophic Factor (BDNF) And Estradiol On Parvalbumin-mediated Cognitive Function: Relevance To Dementia
Funder
National Health and Medical Research Council
Funding Amount
$589,644.00
Summary
Estrogen-based therapy may improve cognitive functioning in dementia patients. However, more detailed knowledge is required to ensure safe and effective targeted treatment is provided. I propose to examine, in mouse models, the mechanistic functioning of estrogen signalling in key brain regions involved in cognition. Unravelling the way estrogen impart its beneficial effect can lead to the development of effective treatments for dementia and many other devastating neurological diseases.
Stress and obesity can lead to high blood pressure and greatly increase the risk of life threatening cardiovascular events. This application seeks to determine which chemicals and parts of the brain are responsible for amplifying the responses to repeated stress and during obesity in animal models leading to hypertension.