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Human ageing is characterised by reduced appetite and food intake, so that average body weight decreases after 70-75 years. This physiological anorexia predisposes to pathological weight loss and malnutrition, worsening of other illnesses, and increased mortality. This project aims to identify causes of this anorexia of ageing, with a view to developing prevention and treatment strategies. We hypothesise that (1) Satiety signals are overactive in the elderly. We will determine whether older peop ....Human ageing is characterised by reduced appetite and food intake, so that average body weight decreases after 70-75 years. This physiological anorexia predisposes to pathological weight loss and malnutrition, worsening of other illnesses, and increased mortality. This project aims to identify causes of this anorexia of ageing, with a view to developing prevention and treatment strategies. We hypothesise that (1) Satiety signals are overactive in the elderly. We will determine whether older people are more sensitive to gastric distension, which reduces appetite and food intake, by measuring perceptions (fullness, hunger, etc), gastric compliance and food intake during intragastric balloon inflation. This will also be done during nutrient infusion into the small intestine, to assess the interaction between gastric and intestinal satiety factors. The contribution of age-related slowing of gastric emptying to the anorexia of ageing will be assessed and the possibility that reduced energy intake worsens the anorexia of ageing will be examined in a nutrient supplementation study. We will have shown that the release of the satiety hormone cholecystokinin (CCK) is greater in older than young adults and that CCK administration causes a greater suppression of food intake in older people, suggesting that increased CCK activity may be a cause of the anorexia of ageing. We will pursue these findings by attempting to increase appetite and food intake in the lderly by administration of a CCK antagonist (blocker). We will also measure the satiating effects of two other probable satiety hormones, amylin and glucagon like peptide 1 in older and young people. (2) The feeding drive is reduced in the elderly Opioids stimulate feeding. In animals this effect is reduced by ageing. To determine whetther this is also so in humans, the suppressive effect of the opioid antagonist naloxone on feeding will be assessed in young and older subjects.Read moreRead less
ProbioticTreatment Of Diarrhoeal Disease And Malnutrition In Top End Aboriginal Children
Funder
National Health and Medical Research Council
Funding Amount
$332,036.00
Summary
Aboriginal children in the Top End of Australia have high rates of hospital admission for diarrhoea and malnutrition. We have discovered that underlying small intestinal damage in these children is an important contributor to the high complication rates and longer lengths of stay in hospital compared to non-Aboriginal children. This research proposes to continue our work on small intestinal damage by using two non-invasive tests of gut function, namely a sugar absorption test and novel breath te ....Aboriginal children in the Top End of Australia have high rates of hospital admission for diarrhoea and malnutrition. We have discovered that underlying small intestinal damage in these children is an important contributor to the high complication rates and longer lengths of stay in hospital compared to non-Aboriginal children. This research proposes to continue our work on small intestinal damage by using two non-invasive tests of gut function, namely a sugar absorption test and novel breath test. The sugar permeability test involves the children drinking a solution of the two sugars lactulose and rhamnose, and measuring their absorption into the blood 90 minutes later using a sophisticated measuring instrument called HPLC, which can measure minuscule amounts of sugars and is set up at Royal Darwin Hospital. The breath test involves children drinking another sugar solution with a special non-radioactive marker called a stable isotope of carbon, and measuring changes in the amount of this marker in carbon dioxide from the breath at timed periods after drinking the sugar solution. The breath is analysed in Adelaide using another sophisticated instrument. These tests are being used to measure abnormal sugar absorption due to intestinal damage, which is particularly common in Aboriginal children during the weaning period of 4-18 months. Our hypothesis is that treatment with 'healthy germs' (probiotics) like those in certain yoghourts will colonise the gut, stimulate immunity and reduce the presence of 'nasty germs' (pathogenic bacteria) in the intestines of Aboriginal children which contribute to the need for their hospitalisation with diarrhoea and malnutrition. If this hypothesis is correct, then this research will provide the best kind of evidence for reducing the need for hospital treatment by treating all cases of diarrhoea with these probiotics and possibly even decreasing the gut damage of children in the weaning period by including probiotics in their dietsRead moreRead less
Prophylactic Early Parenteral Nutrition In Patients Undergoing Hematopoietic Cell Transplantation: A Multi-centre Randomised Controlled Trial.
Funder
National Health and Medical Research Council
Funding Amount
$1,131,673.00
Summary
We intend to conduct a multi-centre clinical trial in patients receiving bone marrow transplants to determine whether very early nutrition support improves overall survival.
Improving Child Health And Development In Resource-constrained Settings: A Multi-component Study To Inform Policy And More Effective Interventions
Funder
National Health and Medical Research Council
Funding Amount
$314,644.00
Summary
This Fellowship will provide innovative, robust evidence of the magnitude of malnutrition and compromised development among children in a large number of low- and middle-income countries and the impact of modifiable social determinants on these profoundly important public health problems. This will inform policy making and the development of effective interventions in disadvantaged groups worldwide.
The Indigenous Australian Malnutrition project aims to explore the burden and impact of malnutrition particularly for Aboriginal and Torres Strait Islander patients in hospital. The project includes the development and validation of the Australian Nutrition Tool (ANT) and validating the Malnutrition Screening Tool (MST) as an appropriate screening tool for Indigenous Australian patients. The project also aims to determine the prevalence of adult malnutrition and explore its burden and impact.
Understanding The Influence Of Agricultural Trade Policy On Food Consumption Patterns, Malnutrition, And Chronic Disease In Thailand And Australia
Funder
National Health and Medical Research Council
Funding Amount
$373,963.00
Summary
Trade policy is often developed without consideration of its effects on health. The Association of South-East Asian Nations (ASEAN) and New Zealand are key trading partners of Australia. Thus the ASEAN-Australia-New Zealand Free Trade Agreement (AANZFTA) was established in 2009. This project aims to analyse the effect of the agricultural trade component of the AANZFTA on food consumption patterns, malnutrition, obesity and chronic disease in Thailand and Australia.