Research
Images of Research
Breast Cancer
Profilin regulation of cancer aggressiveness
Recent groundbreaking work has highlighted the relationship between the levels of profilin and cancer aggressiveness. There is strong evidence that profilin is involved in cell migration and metastasis, making this protein an outstanding therapeutic target in the fight against cancer and in particular breast cancer. Some exciting possible outcomes of our research is that by understanding the molecular mechanism underlying the function of profilin in cancer, we will discover new ways to prevent the development of cancer as well as new potential targets for drug development. To achieve these goals, we are combining many different approaches including biochemistry, structural biology, cell biology and biophysics. We are also taking advantage of cutting-edge developments in molecular imaging and image analysis which not only provides spatial but dynamic information.
Understanding the dynamics of the interactions between molecules that alter the tumorigenicity of cancer cells will provide insights into the mechanisms of cancer development, leading to the generation of more efficient and more cost-effective drugs. Targeted therapies with low systemic toxicity are urgently needed for killing cancer cells, as opposed to current mainstream therapies that are typically non-specific and highly toxic. The key to developing targeted therapies that prevent cancer formation is understanding the basic pathobiology of the target molecules, and this is the primary aim of our research.
Recent work highlighted the relationship between profilin (Pfn1) levels and breast cancer through its interaction with phosphatidylinositides (PIs) a membrane lipid. To date, little is known about the molecular interaction between Pfn1 and the PIs in the cell membrane.
Research Projects
Program leader: Dr Pierre Moens - Publication list.
Autocorrelation curves
We are currently investigating the molecular details of the interaction between Pfn1 (wild type and mutant with altered PIs affinity) and biologically relevant phosphoinositides using a combination of advanced microscopy techniques including multi colour fluorescence correlation spectroscopy (FCS), number and brightness analysis and NMR spectroscopy.
Collaborators: Enrico Gratton and Michelle Digman (University California, Irvine); Glenn King, IMB, (University of Queensland).
GUVs on the wire
We are using giant unilamellar vesicles (GUVs), a model system of the cell membrane in order to gain a better understanding of the dynamic interaction between Pfn1 and PIs as well as the effect of membrane lipid composition and the lateral organisation of membrane lipids (rafts).
Collaborators: Luis Bagatolli (University of Southern Denmark).
Program leader: Dr Joelle Coumans - Publication list.
2DE gel
Using differential expression proteomics (2-D gel electrophoresis and LC-MS/MS) we are investigating the changes in downstream signalling resulting from the alteration of Pfn1 expression levels and alteration of Pfn1 affinity for its ligands (PIs) in normal and cancer cells.
Collaborators: Anne Poljack, BMSF, (University of New South Whales); Partha Roy, (University of Pittsburgh)
The results of our research will significantly enhance our understanding of the role of Pfn1 in cancer and ultimately lead to the development of more efficient drugs which will increase cancer survival due to lower cytotoxicity than current mainstream therapies.
Finally, profilin has been linked to several other diseases such as Huntington's disease, Wiskott-Aldrich Syndrome, Alzheimer's Disease and Mesangial Proliferative Glomerulonephritis. Therefore exploring the molecular mechanisms of profilin has the potential to help understand and develop treatments not only for cancer but also for many other diseases.
Current funding: National Health and Medical Research Council
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(Last updated 27/3/13)