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Harnessing The Dual Roles Of Pericytes To Improve Stroke Outcomes
Funder
National Health and Medical Research Council
Funding Amount
$853,943.00
Summary
Pericytes are cells that are in the walls of capillaries - the smallest blood vessels. Pericytes control blood flow and help promote recovery after injury. In stroke, pericytes squeeze the capillary shut, limiting the amount of energy getting to the brain. This proposal will use innovative techniques to understand how pericytes limit blood flow and also how we can utilise pericytes to improve brain recovery after stroke. This will allow us to identify new potential treatment options for stroke.
Pericyte Dysfunction Limiting Energy Supply In Alzheimer's Disease
Funder
National Health and Medical Research Council
Funding Amount
$717,708.00
Summary
One possible cause of Alzheimer’s disease (AD) could be narrowing of small blood vessels (capillaries) within the brain, limiting blood flow and energy supply. Pericytes, a cell only on capillaries, maintain blood flow throughout the brain. I believe that pericytes may die in AD leading to an energy deficit and memory problems. I will test using human brains and animal models whether pericyte loss causes AD and how this is happening. Pericytes could provide a new therapy option for AD.
Peripheral Mechanisms Involved In Autonomic Hyperreflexia
Funder
National Health and Medical Research Council
Funding Amount
$229,917.00
Summary
Bladder distension or minor unheeded injuries below the lesion in spinally injured people often lead to episodes of high blood pressure that may cause stroke or death. These events require emergency hospitalization and are expensive as well as dangerous. After spinal injury, the control of sympathetic nerves that supply arteries and regulate blood pressure is lost. However, the nerves below the injury remain in place and the spinal cord below the lesion contains connections that can activate the ....Bladder distension or minor unheeded injuries below the lesion in spinally injured people often lead to episodes of high blood pressure that may cause stroke or death. These events require emergency hospitalization and are expensive as well as dangerous. After spinal injury, the control of sympathetic nerves that supply arteries and regulate blood pressure is lost. However, the nerves below the injury remain in place and the spinal cord below the lesion contains connections that can activate them. Signals from the bladder or skin enter the remaining lower part of the spinal cord and activate the sympathetic supply generating a rise in blood pressure. This project will test the hypothesis that increased sensitivity of arteries to the chemicals released from the sympathetic nerves leads to excessive vessel constriction, contributing to the exaggerated increase in pressure. We will investigate arteries removed from rats with experimental spinal transection. We will test the contractions of the arteries (a) to sympathetic nerve stimulation and (b) to the chemicals noradrenaline, adenosine 5'-triphosphate (ATP) and neuropeptide Y that are normally released during nerve activity. We will determine whether release of noradrenaline and ATP from nerves is normal or augmented using electrochemical and electrophysiological techniques. We will compare the responses with those in normal arteries, those in arteries whose nerves have been silenced by removing all connections from the spinal cord and those in arteries that have lost all their nerve supply. This will enable us to identify whether the mechanisms for release of transmitter substances are modified and whether the arterial muscle is hypersensitive to these substances. The results will help in the design of safer treatment for these potentially lethal emergencies in spinal patients.Read moreRead less
Discovering How A Novel Anti-malarial Drug Series Rapidly Kills Parasites
Funder
National Health and Medical Research Council
Funding Amount
$672,971.00
Summary
We have developed a new set of highly potent anti-malarial drugs but we do not know how they work. Identifying how these compounds work is important for improving their effectiveness and safety. We will discover how these drugs kill parasites by using a number of cutting edge methods that could also be useful for discovering how other drugs work. Data generated will progress these compounds along the drug development pipeline which urgently needs a constant supply of new antimalarials.
Biochemical Investigation Of Ubiquitination By The Fanconi Anaemia Pathway
Funder
National Health and Medical Research Council
Funding Amount
$603,447.00
Summary
Fanconi anaemia is an inherited disorder with greatly elevated risk of leukaemia and cancers. The causal genes are ‘tumour suppressors’ that protect us from cancer by a complex function in repair of damage to our DNA. This study aims to understand how this DNA repair function protects us from cancer, and may influence some forms of new forms of cancer treatment.
Do Postjunctional Alterations Explain The Effects Of Diabetes On Neurovascular Transmission?
Funder
National Health and Medical Research Council
Funding Amount
$390,886.00
Summary
Diabetes produces disordered skin blood flow that increases risk of skin ulcers and gangrene. The project investigates nervous control of skin blood vessels in diabetes. It is assumed that all affects of diabetes on nerve function are explained by loss of nerves. We hypothesize that some affects of diabetes are due to dysfunction of blood vessels and not to nerve loss. The objective is to identify drug targets to improve blood flow in skin and thereby reduce the risk of skin ulcers and gangrene.