Cellular And Molecular Mechanisms Of Neuronal Repair By Olfactory Ensheathing Cells
Funder
National Health and Medical Research Council
Funding Amount
$218,250.00
Summary
Traumatic injury to the human brain and spinal cord often results in permanent disability. A major reason is that nerve fibres which act as cables connecting different parts of the nervous system are injured and fail to regrow. Failure of adequate repair is due to the fact that the central nervous system is a hostile environment, lacking in growth promoting stimuli and instead possessing growth inhibitory properties. One of the experimental methods used to alter this environment is the transplan ....Traumatic injury to the human brain and spinal cord often results in permanent disability. A major reason is that nerve fibres which act as cables connecting different parts of the nervous system are injured and fail to regrow. Failure of adequate repair is due to the fact that the central nervous system is a hostile environment, lacking in growth promoting stimuli and instead possessing growth inhibitory properties. One of the experimental methods used to alter this environment is the transplantation of olfactory ensheathing cells into the injury site. Ensheathing cells normally support the nerve fibres involved in the sense of smell. Tissue culture studies show that these cells produce on their surface specific types of molecules as well as soluble growth factors that could interact with nerve fibres to promote growth. Although experiments in which ensheathing cells have been injected into rat spinal cords, have resulted in varying degrees of recovery, the question of how they are able to do this remains unknown. The study proposed here will use tissue culture and in vivo models to investigate how ensheathing cells interact with their surrounding cells. In particular we will examine how soluble factors and direct membrane contact contribute to the regeneration of nerve fibres. We will also examine the effects that ensheathing cells have on non-neuronal cells such as astrocytes and oligodendrocytes and vice-versa. A significant outcome of this project is new insight into the complex cellular interaction that occurs to bring about repair in the central nervous system. The findings will pave the way for the future development of olfactory ensheathing cells as an effective therapeutic agent of nerve repair. This could also include genetic manipulation of ensheathing cells such that their properties are optimised specifically to promote regrowth of nerve fibres.Read moreRead less
Understanding The Role Of The Olfactory Ensheathing Cell In The Olfactory Sensory System
Funder
National Health and Medical Research Council
Funding Amount
$494,000.00
Summary
The olfactory (smell) system is a unique part of the nervous system; nerve cells are generated throughout life and it can regenerate even after injury. It therefore provides an excellent model for examining the growth, development and maintenance of nerve cells. This project will examine how one specialized type of cell, the olfactory ensheathing cell, helps the nerve cells to grow and regenerate. Information we obtain about how this system develops and regenerates may be useful in treating brai ....The olfactory (smell) system is a unique part of the nervous system; nerve cells are generated throughout life and it can regenerate even after injury. It therefore provides an excellent model for examining the growth, development and maintenance of nerve cells. This project will examine how one specialized type of cell, the olfactory ensheathing cell, helps the nerve cells to grow and regenerate. Information we obtain about how this system develops and regenerates may be useful in treating brain disorders and spinal injuries In the current project we will examine how olfactory nerve cells interact with the ensheathing cells. We will use transgenic mice in which the different cells are marked by separate colours which will allow us to easily identify the cells and see where they grow. In addition, we will also examine the behaviour of live cells as they are growing. In the past all attempts to understand how nerve cell connections are formed in the olfactory system have used dead tissue that has been permanently preserved. In this project we have the unique opportunity to visualise living nerve cells to enable us to determine how the cells interact with the ensheathing cells. The advantage of this approach is that it allows us to identify important interactions as they occur, rather than attempting to decipher them after they have occurred. An analogy would be watching a football game live and observing how goals were scored and appreciating the performance of individual players versus trying to guess from the final score how the game was played and who the key performers were. These experiments will provide important information about how the olfactory ensheathing and nerve cells grow and regenerate.Read moreRead less
Olfactory Ensheathing Cells: A Major Contributor To Axon Guidance?
Funder
National Health and Medical Research Council
Funding Amount
$575,749.00
Summary
The olfactory (smell) system is a unique part of the nervous system because nerve cells are generated throughout life. Understanding how the olfactory system grows and regenerates may lead to therapeutic approaches to repair other regions of the nervous system. This project will use high resolution digital time-lapse imaging of living nerve cells and the specialised cells called olfactory ensheathing cells to determine how the behaviour of these cells can be manipulated to improve regeneration.
Molecular Diagnosis And Therapy Of Autoimmune Disease Using Translational And Reverse Translational Approaches
Funder
National Health and Medical Research Council
Funding Amount
$2,331,372.00
Summary
We plan to translate our recent discoveries on human gene variants and molecules produced by immune cells (follicular T cells) into effective therapies for autoimmune diseases. This will involve understanding the mechanisms by which the genes and molecules regulate immune tolerance, stratifying patients with autoimmune disease using newly identified biomarkers, trialling existing biologicals according to affected molecular pathway, and taking novel targets through to commercialisation.
I am an immunologist determining the development and function of the dendritic cell system, including its role in autoimmunity and resistance to infection.
When Prometheus Needs A Hand – How Human Amnion Epithelial Cells Resolve Fibrosis And Regenerate The Liver
Funder
National Health and Medical Research Council
Funding Amount
$530,653.00
Summary
Cirrhosis can progress to end stage disease for which transplantation provides the only hope for survival. Liver donors in Australia are scarce; the need for donor organs is increasing. Using stem cells to repair and regenerate damaged liver may provide an alternative to organ transplantation. We are studying placental stem cells that can decrease inflammation and increase progenitor cells to repair and regenerate liver. Our goal is to use these stem cells as treatment for human liver disease