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ATP Release From Gastrointestinal Epithelium: A Potential Target For The Treatment Of Slow Transient Constipation
Funder
National Health and Medical Research Council
Funding Amount
$317,775.00
Summary
Slow transit constipation (STC) is a severe condition of the colon, almost exclusively affecting reproductive age women with no effective treatment. We recently found an association between STC and defects in connexin proteins in the large intestine. We aim to reveal the role of connexins and female hormones in the maintenance of normal intestinal function and their involvement in STC. The study will provide completely new perspectives in the understanding of the functional bowel disorders.
Distribution, Pharmacology, Molecular Identity And Roles Of Purine Receptors In Enteric Neurons
Funder
National Health and Medical Research Council
Funding Amount
$395,250.00
Summary
Digestive function needs to be adapted to the great variety of foods that we eat, and to our variable dietary habits. Adaptation is controlled through an extensive nervous system in the wall of the gastrointestinal tract, the enteric nervous system, and through digestive system hormones. The enteric nervous system detects the volume and key chemical components in the gastrointestinal lumen and, through an integrating nerve circuitry, causes changes in the patterns of movement, fluid secretion an ....Digestive function needs to be adapted to the great variety of foods that we eat, and to our variable dietary habits. Adaptation is controlled through an extensive nervous system in the wall of the gastrointestinal tract, the enteric nervous system, and through digestive system hormones. The enteric nervous system detects the volume and key chemical components in the gastrointestinal lumen and, through an integrating nerve circuitry, causes changes in the patterns of movement, fluid secretion and local blood flow. Digestive system diseases, for example irritable bowel syndrome, can involve disordered function of the enteric nervous system, and there is considerable research and development focus to identify drug targets in the enteric nervous system that can be used in therapy. Amongst potential targets are receptors for purines that are located on enteric neurons and are one of the important classes of receptor that is involved in communication between the neurons. These studies aim to identify the purine receptors, their roles in controlling digestive function and their potential as therapeutic targets in the treatment of digestive disease.Read moreRead less
The Knotty Problem Of Enterochromaffin Cells And Gastro-intestinal Function: Unravelling Cause And Effect
Funder
National Health and Medical Research Council
Funding Amount
$403,097.00
Summary
It is crucial to understand how the food we eat controls the secretions and movements of a healthy or a diseased gastrointestinal (GI) system. One way control is achieved involves the release of serotonin (5-HT) from the enterochromaffin cells present in the epithelial lining of the intestine. This is the subject of our proposal and our results will help us to understand the causes of GI disorders and help to formulate new treatments.
The Involvement Of Extracellular ATP In Photoreceptor Degeneration
Funder
National Health and Medical Research Council
Funding Amount
$155,145.00
Summary
Retinal photoreceptor degenerations account for approximately 50% of all cases of blindness in those aged over 40 in Australia. This work will investigate whether extracelllular ATP, a signalling molecule, contributes to diseases affecting retinal photoreceptors such as Retinitis Pigmentosa and Age-Related Macular Degeneration.
The Role Of Purines In Age Related Macular Degeneration
Funder
National Health and Medical Research Council
Funding Amount
$682,434.00
Summary
Age Related Macular degeneration (AMD) is a leading cause of blindess. In this project we will examine a possible cause for the development and progression of early AMD. In particular we will determine whether signaling of immune cells via receptors called purinergic receptors influences the removal of cellular debris as we age, predisposing people to the disease.
Acute injury can lead to chronic immune activation in both chronic kidney disease and in transplantation. We will study the role of a class of molecules, the purines, that are released by injury and lead to immune activation. We will focus on the molecular variations and pharmacological blockade of their receptors as potential treatments for kidney disease and transplant graft failure.