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Identification And Characterisation Of The Genes And Pathways In Susceptibility To Inflammatory Bowel Disease
Funder
National Health and Medical Research Council
Funding Amount
$575,581.00
Summary
One of the greatest challenges facing contemporary genetics is to understand the genetics of complex diseases such as inflammatory bowel disease, mutiple sclerosis and schizophrenia. This application seeks to unravel the complex interactions between susceptibility genes and environmental triggers that work together to produce the inflammatory bowel diseases (IBD). Current estimates of the prevalence and incidence suggests that there may be 30-40,000 Australians who suffer from these chronic debi ....One of the greatest challenges facing contemporary genetics is to understand the genetics of complex diseases such as inflammatory bowel disease, mutiple sclerosis and schizophrenia. This application seeks to unravel the complex interactions between susceptibility genes and environmental triggers that work together to produce the inflammatory bowel diseases (IBD). Current estimates of the prevalence and incidence suggests that there may be 30-40,000 Australians who suffer from these chronic debiltating set of diseases known separately as Crohn's disease and ulcerative colitis. One susceptibility gene for Crohn's disease has been recently been identified and the project outlined will extend our knowledge not only to the susceptibility genes themselves, but also to the genes that interact with them to produce the disease via a cascade of immune and inflammatory events. This work is part of a large international effort to identify all IBD susceptibility genes and builds on the resources of the Australian IBD Familiy Register- an Australia wide register of families in which multiple members are affected by CD or UC. A traditional gene mapping approach is used in concert with mutiple analyses of different gene expression profiles in disease versus normal bowel tissues as well as in cell lines from patients versus controls. Validation studies include identification of the particular tissues and cell types that are involved in the pathological immune response typical of IBD as well as characterisation of specific patient genotypes and- or phenotypes that may correlate with expression profiles. Results obtained will be used to identify genes underlying IBD susceptibility, the mutations that drive the disease and eventually therapeutic targets for modulation and treatment of disease.Read moreRead less
How Does Inflammation Of The Gut Change Its Sensory Innervation?
Funder
National Health and Medical Research Council
Funding Amount
$613,767.00
Summary
A large number of patients that are referred to gastroenterologists for pain and discomfort from the bowel are offered no effective treatment. This has a large impact on quality of life and often involves invasive tests to rule out inflammatory or cancerous causes. These patients are classified as suffering from irritable bowel syndrome (IBS). Patients who have diagnosable inflammatory bowel disease (IBD) where colonoscopy is positive may suffer similar symptoms but also have no treatment for th ....A large number of patients that are referred to gastroenterologists for pain and discomfort from the bowel are offered no effective treatment. This has a large impact on quality of life and often involves invasive tests to rule out inflammatory or cancerous causes. These patients are classified as suffering from irritable bowel syndrome (IBS). Patients who have diagnosable inflammatory bowel disease (IBD) where colonoscopy is positive may suffer similar symptoms but also have no treatment for this type of symptom. It is becoming apparent that a large subgroup of IBS patients have undergone prior infection or inflammation, and that there are in fact changes in the types of cells in biopsies from their gut. Thus there are common features to IBS and inflammation. These may provide a means for us to find new treatments for IBS and IBD symptoms. Mice develop similar microscopic changes in the colon after experimental inflammation to those seen in humans, so we can discover more from this model. We have recently established that there are several types of sensory nerve fibres from the mouse colon and rectum that convey information about contractions, distension and chemical mediators released from tissue to the central nervous system. These are almost certainly responsible for generating symptoms in patients. We aim in this project to discover how these sensory nerves change in their responsiveness to mechanical and chemical stimuli in experimental inflammation. Importantly we shall investigate the mediators that are present in the tissue which may activate sensory nerves and-or the receptors on sensory nerves that may be increased. These experiments we hope will provide a target at which to aim novel drug treatments for symptoms of IBS and IBD.Read moreRead less
Understanding The Interplay Between ER Stress And Inflammation
Funder
National Health and Medical Research Council
Funding Amount
$560,918.00
Summary
Chronic inflammatory diseases in the gut and lung affect hundreds of thousands of Australians. We have identified how inflammation causes a type of stress resulting in abnormal protein synthesis in the cells which make the barrier to microbes. Following an infection this process might be the trigger for chronic unresolving inflammatory disease. The further understanding of this process we seek in this project is likely to lead new approaches to treat common inflammatory diseases.
Neuroimmune Interactions In Functional And Organic Gastrointestinal Diseases
Funder
National Health and Medical Research Council
Funding Amount
$419,180.00
Summary
Irritable Bowel Syndrome (IBS) and Inflammatory Bowel Disease (IBD) are chronic, incurable diseases of the lower gastrointestinal tract with unknown causes and poor treatment options. Both the immune and nervous systems are altered in GI disease, but have traditionally been studied in isolation. My research investigates how the neuro-immune axis is altered in these diseases, using animal models and human tissue samples to identify novel treatment options for these debilitating diseases.
Protease Activated Receptor 2 Antagonist In Inflammatory Disease
Funder
National Health and Medical Research Council
Funding Amount
$621,347.00
Summary
The immune response to infection involves a network of proteins that produce an inflammatory response. Sometimes this response is prolonged or uncontrolled and can lead to a large number of inflammatory and other diseases. We have discovered a class of drugs that can bind to a particular protein on the surface of human cells and control this inflammatory response. This property has the potential to treat a wide range of inflammatory and other diseases in humans.
Pathogenesis Of A New Mouse Model Of Ankylosing Spondylitis
Funder
National Health and Medical Research Council
Funding Amount
$682,820.00
Summary
Ankylosing spondylitis and Crohn's disease are autoimmune inflammatory diseases which cause long-term pain and deformity of joints, spine and bowel. Using a new mouse model of both diseases, we will study cells and processes involved in the initiation of disease, in order to discover new targets for prevention and treatment. The work will have importance for design of new therapies for human inflammatory spine and bowel diseases.
Vagal Nerve Stimulation As A Novel Therapy In Inflammatory Bowel Disease
Funder
National Health and Medical Research Council
Funding Amount
$88,502.00
Summary
Inflammatory bowel disease (IBD) is common exerting a large personal and societal burden to the Australian population. Current medications used to treat IBD are expensive, have many side effects and at times require hospitalisation for their administration. We aim to develop the non invasive and inexpensive technique of vagal nerve stimulation as a novel treatment strategy for IBD.
Prof McGuckin is studying common chronic diseases (gut and respiratory inflammatory diseases, arthritis, and obesity and diabetes) that are major contributors to poor health in the Australian community and are major contributors to healthcare expenditure. His research includes basic studies elucidating the biological basis of these diseases and then uses this new knowledge to develop new therapeutic approaches to treatment. The new therapeutic approaches will be tested in model systems as a prel ....Prof McGuckin is studying common chronic diseases (gut and respiratory inflammatory diseases, arthritis, and obesity and diabetes) that are major contributors to poor health in the Australian community and are major contributors to healthcare expenditure. His research includes basic studies elucidating the biological basis of these diseases and then uses this new knowledge to develop new therapeutic approaches to treatment. The new therapeutic approaches will be tested in model systems as a prelude to clinical trials.Read moreRead less