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REVERSIBLE AND IRREVERSIBLE TNF-MEDIATED COGNITIVE DECLINE
Funder
National Health and Medical Research Council
Funding Amount
$444,460.00
Summary
This proposal seeks to clarify the neuronal mechanisms underlying the inflammatory processing leading to cognitive decline. Furthermore, the research project identifies anti-inflammatory treatment options aiming at improved cognitive performance in people at risk for or suffering from cognitive impairment of neuropsychiatric disorders such as dementia and depression.
REGULATION OF GLUCOCORTICOID SENSITIVITY BY ANNEXIN-1
Funder
National Health and Medical Research Council
Funding Amount
$533,828.00
Summary
Steroids like prednisolone or cortisone are very effective at reducing inflammation in diseases like rheumatoid arthritis and are particularly known to decrease substances involved in inflammation. Almost 70% of patients with rheumatoid arthritis are treated more or less continuously with steroids. Steroid resistance (need for higher doses) or changes in steroid-sensitivity has been widely recognized in asthma, inflammatory bowel disease, and rheumatoid arthritis. Many new drug therapies however ....Steroids like prednisolone or cortisone are very effective at reducing inflammation in diseases like rheumatoid arthritis and are particularly known to decrease substances involved in inflammation. Almost 70% of patients with rheumatoid arthritis are treated more or less continuously with steroids. Steroid resistance (need for higher doses) or changes in steroid-sensitivity has been widely recognized in asthma, inflammatory bowel disease, and rheumatoid arthritis. Many new drug therapies however have the aim of keeping cortisone use to a minimum because of undesirable side effects like osteoporosis. Annexin-1 is an anti-inflammatory substance important in arthritis development which is also known to mediate many of the actions of steroids. However, the possible contribution of annexin-1 to mediate the effect of steroids in the regulation of these substances has not been examined. Moreover, how annexin-1 turns genes on is not known. Our studies will therefore reveal whether the absence of annexin-1 will increase inflammatory substances turn genes, and secondly, by determining the possible substances regulated by annexin-1 if the treatment with steroids are less effective in the absence of annexin-1. If annexin-1 is found either to increase anti-inflammatory substances or to mediate the effect of therapeutic steroids, its capacity to be involved in the beneficial effect of steroids may have an important impact in treatment of arthritis and other inflammatory diseases. If annexin-1 functionally acts as steroids, the reduction or discontinuation of steroid use will be possible.Read moreRead less
Inflammation-associated S100 Proteins: Links Between Arthritis And Atherosclerosis
Funder
National Health and Medical Research Council
Funding Amount
$454,691.00
Summary
Deeper understanding of the basic contributions of inflammation to cardiovascular disease can lead to better strategies for treatment and diagnosis. There are shared mechanisms in rheumatoid arthritis and these patients are at significantly higher risk of myocardial infarction and heart failure than the healthy normal population. This project will improve heart health because it will address how newly-recognised proteins, called S100 proteins, mediate pathogenesis and how they are regulated in c ....Deeper understanding of the basic contributions of inflammation to cardiovascular disease can lead to better strategies for treatment and diagnosis. There are shared mechanisms in rheumatoid arthritis and these patients are at significantly higher risk of myocardial infarction and heart failure than the healthy normal population. This project will improve heart health because it will address how newly-recognised proteins, called S100 proteins, mediate pathogenesis and how they are regulated in cells by various therapeutic drugs. We developed a potential diagnostic test that distinguishes patients with angina from those with arthritis and this could be useful in improving diagnosis and following treatment of patients with cardiovascular disease or arthritis. We find that some anti-inflammatory drugs enhance S100 gene expression whereas our preliminary data indicates that some cholesterol-lowering drugs (statins) reduce it. Results of treating patients with arthritis with statins will add to understanding of why cholesterol-lowering drugs commonly used in management of CVD patients may be effective in treating symptoms in arthritis sufferers and could contribute to changes in clinical management of these patients.Read moreRead less
Activated Platelets As Unique Targets For Early Imaging And Site-directed Therapy Of Cardiovascular And Inflammatory Diseases
Funder
National Health and Medical Research Council
Funding Amount
$846,979.00
Summary
Heart attack and inflammatory diseases such as rheumatoid arthritis und multiple sclerosis either kill or severely disable people. We use the presence of platelets early on in these diseases to develop methods for early diagnosis as well as potential drugs for site-directed therapy. We have developed new biotechnological tools to perform novel high sensitivity imaging in Positron Emission Tomography (PET) and laser light imaging as well as a localised anti-inflammatory therapy.
During injury or infection, our body’s immune system protects us by launching inflammation. But uncontrolled inflammation drives common diseases such as cancer, diabetes, Alzheimer’s and Parkinson's. This research program will reveal how the body deactivates inflammasomes – protein complexes at the heart of inflammation and disease – so we can design better drugs for treating patients with inflammation-driven disease.
A T Cell-Specific GR Promoter Determines Responsiveness To Glucocorticoids In Different Immune Compartments
Funder
National Health and Medical Research Council
Funding Amount
$417,500.00
Summary
Synthetic glucocorticoids, such as dexamethasone and prednisolone, are commonly used as potent anti-inflammatory steroid drug during the treatment of major human trauma and cancer. A side-effect of these very high steroid doses is a major down-regulation of the immune system, particularly massive death of important immune cells called T-cells, which can have a major impact on patient recovery and potential mortality. These T cells are particularly sensitive to glucocorticoid-induced cell death a ....Synthetic glucocorticoids, such as dexamethasone and prednisolone, are commonly used as potent anti-inflammatory steroid drug during the treatment of major human trauma and cancer. A side-effect of these very high steroid doses is a major down-regulation of the immune system, particularly massive death of important immune cells called T-cells, which can have a major impact on patient recovery and potential mortality. These T cells are particularly sensitive to glucocorticoid-induced cell death and have very high levels of receptors for these steroids called glucocorticoid receptors (GRs). We have discovered a unique GR gene promoter (designated 1A) that is active in T cells. Very little is known about how this gene promoter is regulated. This promoter may be a useful therapeutic target to block T cell death (caused by steroids) during recovery from injury, infection and cancer. Separation of anti-inflammatory and side-effects such as high T-cell death or blockade of these effects on T cells would have a major impact on patient immune status and recovery, and reduce the incidence of debilitating side-effects. Therapeutic down-regulation of this T cell-specific GR gene promoter could lead to targeted blockade of steroid-induced T cell death and help maintain a strong immune system. This application brings together a unique team of investigators (CIs) that have a strong history of collaboration in this area with recent publications in very high ranking international journals. The CIs bring a multi-disciplined approach combining endocrinology, molecular biology and cellular immunology to determine the underlying mechanisms of steroid actions and their effects on immune function. Both Dr Cole (CIA) and Dr Godfrey (CIB) have excellent track records in this area.Read moreRead less
Designing Novel Apolipoprotein A1 Mimetic Peptides As Drug Treatment For Atherosclerosis
Funder
National Health and Medical Research Council
Funding Amount
$60,016.00
Summary
Cardiovascular disease is the formation of atherosclerotic plaques caused by the imbalance between the amount of cholesterol delivered and removed from the arteries. Apolipoprotein A-1 (ApoA-1) is the main protein of high density lipoprotein (HDL) and removes cholesterol out of cell. In this project we are aimed at designing and testing new drugs (ApoA1-mimetic peptides) which will elicit the same anti-atherogenic properties as apoA-1, as a therapeutic agent for prevention of atherosclerosis.
Developing Anti-Inflammatory Drugs Based On Inhibition Of A Human Enzyme
Funder
National Health and Medical Research Council
Funding Amount
$160,000.00
Summary
Human secretory phospholipases A2 have been associated with inflammatory diseases for many years, yet very few truly potent inhibitors of the human enzymes sPLA2 (isoforms IIa, V or X) are known due to a range of problems relating to the lipid nature of substrates, unavailability of enzymes, enzyme assays that do not correlate with in vivo data. Although there remains controversy about which enzyme is responsible in vivo for degrading membrane phospholipids to inflammatory mediators like arachid ....Human secretory phospholipases A2 have been associated with inflammatory diseases for many years, yet very few truly potent inhibitors of the human enzymes sPLA2 (isoforms IIa, V or X) are known due to a range of problems relating to the lipid nature of substrates, unavailability of enzymes, enzyme assays that do not correlate with in vivo data. Although there remains controversy about which enzyme is responsible in vivo for degrading membrane phospholipids to inflammatory mediators like arachidonate, PAF, prostaglandins, leukotrienes, etc. there is a consensus that blockade of phospholipid metabolism would represent a major advance on NSAIDs as antiinflammatory agents. No sPLA2-IIa inhibitor is available yet in man. We aim to create an attractive data package showing proof of concept for a potent new type of antiinflammatory drug. This data will give us an improved negotiating position in our commercialisation of a new drug with potential multi-billion dollar markets as diverse as arthritis, asthma, reperfusion injury, organ transplantation and many other currently intractable human ailmentsRead moreRead less
Resolvin E1 Is A Novel Anti-inflammatory And Anti-fibrotic Lipid Mediator For The Treatment Of Chronic Kidney Disease.
Funder
National Health and Medical Research Council
Funding Amount
$519,246.00
Summary
This project will ascertain whether a naturally occurring compound, Resolvin E1 with potent anti-inflammatory properties, can effectively halt the progression of experimental kidney disease. We will also test whether Resolvin E1 can exert other potential benefits in suppressing progressive fibrosis of the kidney. The outcome of this study will allow us to evaluate the therapeutical potential of Resolvin E1 for the treatment of acute and chronic kidney diseases.