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Physiologic And Aberrant DNA Recombination In B Lymphocytes
Funder
National Health and Medical Research Council
Funding Amount
$408,768.00
Summary
B cells produce antibody which is critical to fight infection. In order to perform this function, antibody genes must first be modified by immune enzymes. However, abnormal DNA attack by these enzymes outside of antibody genes can result in B cell cancer. How the immune system detects and destroys cancerous B cells is poorly understood. This research will provide insight into these processes, and in doing so will further our understanding of how B cell cancers develop and how they are destroyed.
The immune system is the essential complex barrier that protects the organism for infections and some malignancies. Despite considerable efforts, the mechanism by which immune cells kill dangerous unwanted cells is poorly understood. This project will investigate the mechanism of action and the role in human pathologies of a key component of the immune system, a toxic protein perforin.
We will work with Coridon Pty Ltd to optimize the practical administration of a vaccine designed to cure people already infected with cancer-promoting papilloma viruses.
Vaccines that deposit memory T cells within the lung, gut and genital tract hold enormous therapeutic potential, as these mucosal surfaces are major portals of entry into the body for many viruses. However, the accumulation of large numbers of T cells within the mucosal tissue may increase the number of target cells for T cell trophic viruses (eg HIV) to infect. We will explore factors that result in the generation of mucosal memory T cells that are resistant to virus infection.
Analysis Of The Molecular Functions Of Perforin: A Critical Role In Tumor Immunosurveillance
Funder
National Health and Medical Research Council
Funding Amount
$318,916.00
Summary
Over the past decade, great steps have been made in defining the key molecules used by killer cells of the immune system that eliminate cancerous- and virus-infected cells and many of these advances have originated in our laboratory. It is now clear that granule-mediated cytolysis is a key mechanism for controlling both primary and metastatic cancers in transplanted syngeneic, allogeneic and xenogeneic tumor models in mice. The pore-forming protein, perforin is indispensable for effective killer ....Over the past decade, great steps have been made in defining the key molecules used by killer cells of the immune system that eliminate cancerous- and virus-infected cells and many of these advances have originated in our laboratory. It is now clear that granule-mediated cytolysis is a key mechanism for controlling both primary and metastatic cancers in transplanted syngeneic, allogeneic and xenogeneic tumor models in mice. The pore-forming protein, perforin is indispensable for effective killer cell function in these models. But the role for perforin expressing killer cells in tumor surveillance against spontaneous tumorigenesis is still hotly debated. Our proposal to study tumor development in perforin-deficient p53-mutant tumor prone mice will enable us to answer this question. Furthermore, the molecular mechanisms by which perforin functions are poorly understood. We therefore also propose to complete a structure-function analysis of perforin using unique tools and information that our laboratory has at its disposal. The long-term goal will be to better understand the function of perforin at the molecular level such that the rationale design of therapeutic perforin inhibitors may become a reality for future regulation of killer cell effector functions in disease.Read moreRead less