Defining The Function Of Two Discrete Precursor Cell Populations In The Adult Hippocampus: Potential For The Treatment Of Cognitive And Mood Disorders
Funder
National Health and Medical Research Council
Funding Amount
$578,985.00
Summary
Adult hippocampal neurogenesis plays a crucial role in fundamental cognitive processes such as learning and memory formation and mood regulation. Our laboratory has identified two discrete pools of quiescent stem and precursor cells in the adult hippocampus that can be activated by distinct mechanisms. This study will examine the functional properties of new neurons generated from these discrete pools and their role in improving behavioural outcomes associated with cognition and mood regulation
A Breakdown Of Cortical Homeostasis In Depression: A Focus On The Anterior Cingulate
Funder
National Health and Medical Research Council
Funding Amount
$625,629.00
Summary
Major depressive disorders affect 20% of the Australian population. Some symptoms of major depressive disorders arise because of a dysfunction of the human brain, particularly the cortex. Our studies show there are biochemical changes in the anterior cingulate cortex in people with mood disorders. We will now extend our studies to show there is a breakdown in the balance between neurotransmitter and neuroinflammation pathways in the anterior cingulate cortex in major depressive disorders.
Understanding The Role Of Muscarinic Receptors In The Pathophysiology Of Depression And Bipolar Disorder
Funder
National Health and Medical Research Council
Funding Amount
$480,074.00
Summary
The causes of bipolar disorder and major depressive disorder, which effect many Australians, remain unknown. We have recently shown decreases in muscarinic receptors in the brain of people with bipolar disorder and major depressive disorder. Muscarinic receptors are important in maintaining the functions of the brain that seem to be affected in people with bipolar disorder and major depressive disorder. Here we seek to understand how changes in muscarinic receptors occur in both disorders.
THE NEUROBIOLOGICAL BASIS OF INDIVIDUAL DIFFERENCES IN SUSCEPTIBILITY TO THE CONSEQUENCES OF STRESS
Funder
National Health and Medical Research Council
Funding Amount
$583,875.00
Summary
Stress plays a major role in the development and progression of many different mental health disorders. However, as we all know, the effects of stress on one person can be very different from its effects upon another. This is at least partly explained by differences in individual coping styles. When faced with a stressful situation without a ready solution, people tend to divide into two broad camps: those with an innate tendency to adopt passive coping strategies, such as avoidance, and those t ....Stress plays a major role in the development and progression of many different mental health disorders. However, as we all know, the effects of stress on one person can be very different from its effects upon another. This is at least partly explained by differences in individual coping styles. When faced with a stressful situation without a ready solution, people tend to divide into two broad camps: those with an innate tendency to adopt passive coping strategies, such as avoidance, and those that tend towards active coping strategies, such as attempting to take control of the situation. Previous studies have provided findings that suggest that passive coping is more common amongst sufferers of depression, post-traumatic stress disorder, and chronic pain syndrome than is active coping. But is this cause, or effect? And what are the intervening brain mechanisms? We attempt to address such questions in the present project using an animal model in which social conflict has been shown to trigger depression-like symptoms. In particular we wish to: (i) determine whether the patterns of brain activity triggered by social conflict are different for active vs. passive copers; (ii) determine whether the depression-like consequences of social conflict are more severe in passive than in active copers; (iii) determine whether differences in coping style and vulnerability to social conflict stress are due to the actions of a particular neurotransmitter, dopamine, in the prefrontal cortex of the brain; (iv) determine whether the actions of antidepressants might be attributable changes in prefrontal cortex dopamine function which in turn promote active coping in preference to passive coping. These studies will provide exciting new information about the neurobiological basis of individual differences in vulnerability to the harmful effects of stress, and thus will offer the hope of developing new ways of preventing devastating illnesses such as depression.Read moreRead less
CRE In Traumatic Brain Injury Psychosocial Rehabilitation: Breaking Down Barriers For Social Reintegration
Funder
National Health and Medical Research Council
Funding Amount
$2,678,530.00
Summary
Severe traumatic brain injury (TBI) from motor vehicle accidents, assaults and accidents will surpass many diseases as the major cause of disability in the Western world by 2020. It causes cognitive and emotional disorders that result in unemployment, loss of relationships, social isolation and depression in adults and children. This CRE is a world first, tackling deficits in fatigue, mood, self-awareness and self-regulation and social competency, i.e. speech, social skills and communication.
Dopamine-2 Receptor Antibody In Movement And Psychiatric Disorders
Funder
National Health and Medical Research Council
Funding Amount
$415,783.00
Summary
Autoimmune movement and psychiatric disorders are a common cause of neurological disability young adults and adolescents. We have identified a subgroup of patients whose disease is associated with an autoimmune reaction. Our study will identify the earliest immune responses against the brain in children with autoimmune movement and psychiatric disorders. Identifying these early immune responses will allow early and directed treatments to prevent disability and death in the future.
Neourobiology Of Human Epilepsy: Genes, Cellular Mechanisms,network And Whole Brain
Funder
National Health and Medical Research Council
Funding Amount
$17,652,824.00
Summary
The team is comprised of neurologists, molecular geneticists, physiologists and brain imaging specialists and leads the world in the discovery of the genetic causes of epilepsy. They will continue to identify genes underlying epilepsy and study how genetic variations result in development of seizures. Advanced brain imaging will be used to understand the effects of genetic variation on brain structure and function. This study may lead to new diagnostic methods and treatments for epilepsy.
Targeting Of Callosal Axons To Duplicate Cortical Areas In The Contralateral Hemisphere
Funder
National Health and Medical Research Council
Funding Amount
$600,785.00
Summary
The two sides of the brain communicate via a large fibre tract called the corpus callosum. This proposal investigates how the corpus callosum is formed during embryonic and postnatal development. Specifically, we investigate how the axons that make up the corpus callosum are able to locate their precise target in the contralateral hemisphere so that the brain circuit they form will be functional. We have developed a new mouse model to discover the fundamental mechanisms regulating how the brain ....The two sides of the brain communicate via a large fibre tract called the corpus callosum. This proposal investigates how the corpus callosum is formed during embryonic and postnatal development. Specifically, we investigate how the axons that make up the corpus callosum are able to locate their precise target in the contralateral hemisphere so that the brain circuit they form will be functional. We have developed a new mouse model to discover the fundamental mechanisms regulating how the brain is wired in order to function correctly.Read moreRead less
Guidance Mechanisms Regulating The Development Of Axonal Projections From The Cingulate Cortex.
Funder
National Health and Medical Research Council
Funding Amount
$484,236.00
Summary
The corpus callosum is the largest fibre tract in the brain and connects neurons in the left and right cerebral hemispheres. A subpopulation of callosal axons arise from neurons in the cingulate cortex and are the first to cross the midline. Defects in activation or wiring of the cingulate cortex are strongly implicated in acute pain, schizophrenia and bipolar disorder. This proposal investigates how the commissural projections of the cingulate cortex become wired up during development.