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Investigation Of A Tumour Enzyme As A Predictor Of Patient Response To An Australian Anti-cancer Drug
Funder
National Health and Medical Research Council
Funding Amount
$362,082.00
Summary
GSAO is a new cancer drug we have developed that is currently being trialed in cancer patients. Our investigation of how GSAO works has revealed that it needs to be activated by an enzyme expressed by certain types of cancers. This finding implies that GSAO should be more effective against cancers that make this enzyme. Our aim is to establish this concept in laboratory based experiments as a basis for selection of patients who are more likely to benefit from GSAO treatment.
Synthetic Analogues Of The Actinomycin, Quinamycin And Nogalamycin Groups Of Antitumour Antibiotics
Funder
National Health and Medical Research Council
Funding Amount
$376,433.00
Summary
The principal difficulty in the treatment of the common solid tumours that cause the majority of cancer deaths is the problem of drug resistance. For example, many patients with cancer of the lung, breast or colon respond well to drug treatment with their tumours initially regressing, only to return later in an aggressive drug-resistant form. In this event, the inevitable outcome is that the tumour grows through drug treatment and the patient eventually succumbs and dies. This is also a familiar ....The principal difficulty in the treatment of the common solid tumours that cause the majority of cancer deaths is the problem of drug resistance. For example, many patients with cancer of the lung, breast or colon respond well to drug treatment with their tumours initially regressing, only to return later in an aggressive drug-resistant form. In this event, the inevitable outcome is that the tumour grows through drug treatment and the patient eventually succumbs and dies. This is also a familiar scenario in the treatment of adults with leakaemias and non-Hodgkins lymphomas. The underlying cause of drug resistance is the genetic instability of cancer cells which results in tumours that are heterogeneous, making it almost inevitable that a cancer cell will arise that is resistant to treatment. There are many mechanisms of resistance, some of which are peculiar to particular drug types, some are permeability barriers and some involve genetic deregulation of the biochemistry of cell death. One way of subverting resistance is by the use of drugs whose mechanism of action is novel so that the tumour is challenged to devise a new defense. Here, we are attempting to develop synthetic analogues of a class of naturally- occurring antitumour antibiotic whose mechanism of action is unusual but which has not been exploited by medicinal chemists because of the difficulty of the chemistry involved. These antibiotics work by binding to DNA and inhibiting the first step in the process whereby genes are turned into proteins. We have designed compounds that are chemically accessible that our preliminary work suggests mimic the DNA-binding and biological properties of the natural antibiotics. The proposed work will enable us to evaluate whether this new class of agent has experimental antitumour activity, particularly amongst drug-resistant tumours.Read moreRead less
Development Of DNA Targeted Platinum Agents As Potential Anticancer Drugs
Funder
National Health and Medical Research Council
Funding Amount
$410,250.00
Summary
A number of clinically useful anticancer drugs damage DNA. As a result of this damage these drugs kill cancer cells. This project aims to develop new platinum-containing compounds which are specifically targeted to DNA. Through this strategy it is possible that new and more useful anticancer drugs could emerge.
Development Of DNA Phosphate Crosslinking Agents As Potential Anticancer Drugs
Funder
National Health and Medical Research Council
Funding Amount
$392,545.00
Summary
The principal difficulty in the treatment of the common solid tumours that cause the majority of cancer deaths is the problem of drug resistance. For example, many patients with cancer of the lung, breast or colon respond well to drug treatment with their tumours initially regressing, only to return later in an aggressive drug-resistant form. In this event, the inevitable outcome is that the tumour grows through drug treatment and the patient eventually succumbs and dies. This is also a familiar ....The principal difficulty in the treatment of the common solid tumours that cause the majority of cancer deaths is the problem of drug resistance. For example, many patients with cancer of the lung, breast or colon respond well to drug treatment with their tumours initially regressing, only to return later in an aggressive drug-resistant form. In this event, the inevitable outcome is that the tumour grows through drug treatment and the patient eventually succumbs and dies. This is also a familiar scenario in the treatment of adults with leukaemias and non-Hodgkins lymphomas. The underlying cause of drug resistance is the genetic instability of cancer cells which results in tumours that are heterogeneous, making it almost inevitable that a cancer cell will arise that is resistant to treatment. There are many mechanisms of resistance, some of which are peculiar to particular drug types, some are permeability barriers and some involve genetic deregulation of the biochemistry of cell death. Alkylating agents are one of the most important classes of anticancer drug. They bind irreversibly to the bases in DNA and weld the two strands of the double helix together. This cross-link is a powerful block to DNA replication and leads to the death of cancer cells by the process of programmed cell death. Cancer cells generally become resistant to alkylating agents by invoking repair mechanisms that remove the drug from the DNA bases, a response which breaks the cross-link and returns the DNA to its normal state. In this project, we are developing a new type of alkylating agent that reacts not with the DNA bases but with the phosphate groups of the DNA backbone. By this means the strands of DNA can again be cross-linked but now the linkage is between parts of the DNA that cancer cells cannot separate. In this way, we hope to be able to devise new drugs that are resistant to the normal mechanisms of DNA repair so that they will be active against drug-resistant tumours.Read moreRead less
A New Class Of Inhibitors For The Treatment Of Tuberculosis
Funder
National Health and Medical Research Council
Funding Amount
$720,691.00
Summary
Tuberculosis (TB) remains a major cause of mortality and morbidity worldwide, with 1.3 million deaths annually. Some strains of the TB bacterium are resistant to all available drugs. We have identified novel chemical structures that display potent and specific activity against pathogenic mycobacteria. In this proposal we will develop optimised derivatives with more potent activity against mycobacteria, assess their stability and toxicity and determine their mode of action.
The blood-brain barrier is a major impediment to the treatment of brain tumours because it prevents most anti-cancer drugs from entering the brain, and brain tumour, from the bloodstream. This proposal examines new approaches to open the blood-brain barrier to allow the use of existing highly potent anti-cancer drugs as brain cancer therapies. Successful outcomes of this work could lead to substantial improvements in the outcomes for brain tumour patients.
Prevention And Treatment Of Bone Infection With CSA-90
Funder
National Health and Medical Research Council
Funding Amount
$350,983.00
Summary
Bone infections are a major challenge to treat, especially with the rise of drug resistant “superbugs”. We have access to a new agent, CSA-90, that has dual properties of being anti-microbial (antibiotic) and helps encourage bone growth. This project aims to expand upon our prior research and test CSA-90 for the treatment of chronic bone infections. We will also look at applying this technology to joint replacements and this drug may be particularly useful for coating orthopaedic implants.
Dietary Therapies For The Treatment Of Drug-resistant Epilepsy
Funder
National Health and Medical Research Council
Funding Amount
$69,757.00
Summary
Epilepsy affects about 225,000 Australians, with 30% of suffers still experiencing seizures despite being on medications. A reduction in seizures can significantly improve the health of people with epilepsy who do not respond to medications. Low carbohydrate, high fat diets are a well-established treatment option in children, but this has not previously been studied in Australian adults. The aim of this research is to evaluate if dietary therapies are an effective treatment in adult epilepsy.