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Acid Resistance Mechanisms Of Helicobacter Pylori And Their Impact On Gastric Colonisation
Funder
National Health and Medical Research Council
Funding Amount
$287,036.00
Summary
The gastric bacterium, Helicobacter pylori, infects more than half the population of the globe. H. pylori may cause either no symptomatic disease, induce peptic ulcers or be responsible for one of the major killing cancers, gastric cancer. Millions die or suffer from this infection each year. Yet we are remarkably ignorant of why the infection causes these different patterns of disease. This project aims to provide evidence to show that the very mechanism the bacterium has acquired to help it re ....The gastric bacterium, Helicobacter pylori, infects more than half the population of the globe. H. pylori may cause either no symptomatic disease, induce peptic ulcers or be responsible for one of the major killing cancers, gastric cancer. Millions die or suffer from this infection each year. Yet we are remarkably ignorant of why the infection causes these different patterns of disease. This project aims to provide evidence to show that the very mechanism the bacterium has acquired to help it resist stomach acid and so live in the stomach, is responsible for these differences. I.e. The organism lives in different parts of the stomach due to differences in local acid at that site. If the acid in a particular part of the stomach is too high, the acid resistance mechanism cannot cope. If the acid is too low, the organism also cannot grow well. Because the bacterium has evolved to only thrive in a relatively narrow range of acid, it will behave very differently in these different parts of the stomach. This results in different diseases. Various populations in different countries of the world have different levels of acid production and this also explains why in some countries duodenal ulcers predominate and in others gastric ulcer- gastric cancer is the norm. Showing why H. pylori lives where it lives will provide fundamental information relevant to understanding some of the world s major diseases and will also provides insights relevant to the design of new therapeutic approaches.Read moreRead less
The Effect Of Metals On Neurofibrillary Tangle Formation
Funder
National Health and Medical Research Council
Funding Amount
$333,313.00
Summary
The majority of studies into Alzheimer's disease (AD) have focussed on two brain lesions- the plaque and neurofibrillary tangle (NFT), which are believed to have a causative role in AD. Our lab has made several seminal discoveries about the role that metals play in the development of plaques. We are now extending this work to evaluate the role of metals in NFT formation. These studies will provide insight into the formation and possible treatments for this primary brain lesion in AD.
Understanding The Genetic Determinants Of Central Corneal Thickness And Its Functional Role In Glaucoma Pathophysiology
Funder
National Health and Medical Research Council
Funding Amount
$297,263.00
Summary
Glaucoma is a common cause of blindness and visual diability in Australia. It is caused by a combination of environmental and genetic factors. People with a thin cornea (the clear covering at the front of the eye) are at increased risk of glaucoma. We are investigating the biological link between the cornea and glaucoma as well as identifying genes that determine corneal thickness. Some of these genes may also cause glaucoma. Understanding this will lead to better diagnosis and treatment.
Differences Between Physiological And Pathological Cardiac Hypertrophy Offer New Strategies For Treating Heart Failure
Funder
National Health and Medical Research Council
Funding Amount
$335,473.00
Summary
The heart becomes large both in athletes as well as in patients with heart disease and failure. In the first instance, the large (hypertrophied) heart has normal or even increased pumping ability (function) whereas in the patient with heart disease the function is depressed and the heart may fail. My studies are directed towards finding out what is the difference in these 2 situations and what mechanisms are responsible for making one big heart pump well and the other big heart pump poorly. Spec ....The heart becomes large both in athletes as well as in patients with heart disease and failure. In the first instance, the large (hypertrophied) heart has normal or even increased pumping ability (function) whereas in the patient with heart disease the function is depressed and the heart may fail. My studies are directed towards finding out what is the difference in these 2 situations and what mechanisms are responsible for making one big heart pump well and the other big heart pump poorly. Specifically my project hopes to identify the genes and proteins responsible for the differences. I have already identified one such gene and I now plan to manipulate this gene by overexpressing it in animals (transgenic mice) with heart failure. I predict that overexpression of this gene will improve heart function in models of heart failure. If the hypothesis is correct, activating genes that are activated in the athlete's heart maybe a potential tool for improving heart function, quality of life and life span in patients with heart failure.Read moreRead less