Prediction Of Clinical Radiosensitivity Caused By Ionising Radiation During Radiotherapy.
Funder
National Health and Medical Research Council
Funding Amount
$447,750.00
Summary
Around one to five percent of cancer patients suffer from significant side effects in normal tissue exposed to ionizing radiation during radiotherapy. Although radiotherapy is an effective therapy for cancer treatment, the amount of radiation is generally restricted to minimize the incidence of these severe side effects (radiosensitivity). This means that individuals who don't have radiosensitivity are not getting the dose of radiation that would be most beneficial. A major goal of radiation bio ....Around one to five percent of cancer patients suffer from significant side effects in normal tissue exposed to ionizing radiation during radiotherapy. Although radiotherapy is an effective therapy for cancer treatment, the amount of radiation is generally restricted to minimize the incidence of these severe side effects (radiosensitivity). This means that individuals who don't have radiosensitivity are not getting the dose of radiation that would be most beneficial. A major goal of radiation biology research is to develop efficient predictive measures that could identify radiosensitive individuals prior to treatment. This predictive ability would enable the individualisation of radiotherapy radiation doses, which should result in improvement of tumour control rates and a reduction in the incidence of side effects associated with radiotherapy. We aim to understand radiosensitivity at the molecular level using the powerful technology of microarrays. Using microarray technology, thousands of genes can be tested for expression activity simultaneously. We have a unique tissue bank established from many radiosensitive and non-sensitive control radiotherapy patients. The use of microarray technology on samples from this unique tissue bank may enable the gene expression pattern of individuals that display radiosensitivity to be distinguished from the rest of the population. In conjunction, two additional tests will be used to determine who is susceptible to radiosensitive reactions which include assessment of a DNA repair pathway and assessment of the length of the telomeres (Caps on the ends of the chromosomes), both of which have been shown to be involved with radiosensitivy. This experimentation will hopefully lead to the development of a predictive assay for use in the clinic for cancer patients prior to receiving radiotherapy.Read moreRead less
Improving Immunoassays For The Diagnosis Of Latent Tuberculosis Infection In Children
Funder
National Health and Medical Research Council
Funding Amount
$489,006.00
Summary
WHO highlights the urgent need for new tests for tuberculosis (TB). Diagnosis of latent TB infection (LTBI) is vital in children to prevent them developing active TB. A tuberculin skin test has long been used but is not always accurate. More accurate blood tests (immunoassays) have recently been developed which improve the diagnosis of LTBI in adults. However, we have shown that these assays do not work well in children. We aim to improve the performance of immunoassays for diagnosing LTBI in ch ....WHO highlights the urgent need for new tests for tuberculosis (TB). Diagnosis of latent TB infection (LTBI) is vital in children to prevent them developing active TB. A tuberculin skin test has long been used but is not always accurate. More accurate blood tests (immunoassays) have recently been developed which improve the diagnosis of LTBI in adults. However, we have shown that these assays do not work well in children. We aim to improve the performance of immunoassays for diagnosing LTBI in children.Read moreRead less
How Do Glycosaminoglycans Promote The Propagation Of Prions?
Funder
National Health and Medical Research Council
Funding Amount
$512,270.00
Summary
The prion diseases are a group of transmissible, neurodegenerative disorders affecting both humans and animals. The most common form in humans is sporadic Creutzfeldt-Jakob disease (CJD), although acquired (variant CJD) and inherited (familial CJD) forms are recognised. Prion diseases are transmissible to the same species by inoculation with, or dietary exposure to, infected tissues. The infectious agent, referred to as a prion , has not been identified at the molecular level. However, a major c ....The prion diseases are a group of transmissible, neurodegenerative disorders affecting both humans and animals. The most common form in humans is sporadic Creutzfeldt-Jakob disease (CJD), although acquired (variant CJD) and inherited (familial CJD) forms are recognised. Prion diseases are transmissible to the same species by inoculation with, or dietary exposure to, infected tissues. The infectious agent, referred to as a prion , has not been identified at the molecular level. However, a major component of purified prions is an abnormal disease associated form of the host encoded prion protein. Understanding how the disease associated form of the prion protein is generated and how host-derived cofactors contribute to its formation will help in our understanding of the infectious nature of these diseases and in the development of effective therapeutic and prophylactic strategies. Glycosaminoglycans are host-derived components of the extracellular matrix that are associated with prion protein plaques found in the brain tissue of patients with prion diseases. Glycosaminoglycans are believed to influence the transmission of prions and the ongoing propagation of infectivity. In this study the importance of glycosaminoglycans in the formation of the disease associated prion protein and the generation of infectivity will be investigated using both cell-free and cell-based models of prion propagation. The understanding gained from this study will be used to develop a high throughput assay that can be used to detect prion infection prior to the development of clinical disease and within a time frame whereby therapeutic intervention may be effective.Read moreRead less