A novel magnetic resonance imaging (MRI) technique to characterise white matter microstructure in the brain. Integrity of the cellular architecture of brain white matter (WM) is vital to normal signal conduction and is disrupted in diseases such as multiple sclerosis. Due to their characteristic molecular arrangements, WM microstructures have distinct magnetic susceptibility characteristics that can be detected with high-field and ultra high-field magnetic resonance imaging (MRI). The objective ....A novel magnetic resonance imaging (MRI) technique to characterise white matter microstructure in the brain. Integrity of the cellular architecture of brain white matter (WM) is vital to normal signal conduction and is disrupted in diseases such as multiple sclerosis. Due to their characteristic molecular arrangements, WM microstructures have distinct magnetic susceptibility characteristics that can be detected with high-field and ultra high-field magnetic resonance imaging (MRI). The objective of this project is to develop and validate a novel method of mapping susceptibility effects at high (sub-voxel) resolution with MRI. The outcomes will be a more comprehensive understanding of the relationship between changes in MRI signal and WM microarchitecture and improved susceptibility mapping that may lead to earlier diagnosis and more effective therapeutic monitoring.Read moreRead less
Functional magnetic resonance imaging: Decoding the palimpsest. This project aims to model the dynamics of functional magnetic resonance imaging (fMRI) to image new physiology and attain higher resolution. This will enable new aspects of brain dynamics to be imaged, achieving higher resolution and improving interpretation. This project is expected to improve the use and power of fMRI, unlock new avenues for probing brain function and save experimental costs. This will have many uses in neuroscie ....Functional magnetic resonance imaging: Decoding the palimpsest. This project aims to model the dynamics of functional magnetic resonance imaging (fMRI) to image new physiology and attain higher resolution. This will enable new aspects of brain dynamics to be imaged, achieving higher resolution and improving interpretation. This project is expected to improve the use and power of fMRI, unlock new avenues for probing brain function and save experimental costs. This will have many uses in neuroscience, brain imaging technology and fMRI analysis software.Read moreRead less
Probe-free biophysical force and torque measurements with optical tweezers. This project aims to develop probe-free biophysical force and torque measurement methods based on optical tweezers. Many areas of research in cell biology are hampered by a lack of quantitative force measurements. This project aims to provide accurate quantitative measurements to enable in-depth understanding of forces at work during cell division, properties of blood cells and sperm motility which could generate further ....Probe-free biophysical force and torque measurements with optical tweezers. This project aims to develop probe-free biophysical force and torque measurement methods based on optical tweezers. Many areas of research in cell biology are hampered by a lack of quantitative force measurements. This project aims to provide accurate quantitative measurements to enable in-depth understanding of forces at work during cell division, properties of blood cells and sperm motility which could generate further research leading to health benefits.Read moreRead less
Force microscopy with arbitrary optically-trapped probes and application to internal mechanics of cells. The ability to perform micromanipulation on particles, macromolecules, subcellular organelles, or whole cells is fundamental in elucidating processes such as chromosome movement during cell division, and movement of cell components in and out of the cell. The recent advances in optical tweezers have allowed this type of micromanipulation to approach reality. However, determination of the true ....Force microscopy with arbitrary optically-trapped probes and application to internal mechanics of cells. The ability to perform micromanipulation on particles, macromolecules, subcellular organelles, or whole cells is fundamental in elucidating processes such as chromosome movement during cell division, and movement of cell components in and out of the cell. The recent advances in optical tweezers have allowed this type of micromanipulation to approach reality. However, determination of the true optical force is critical for this technique to reach its full potential. This project will develop novel techniques to quantitatively determine the absolute optical force applied to the cell component using the process of ingestion (phagocytosis) as a proof-of-principle test, and measure forces in chromosome movement and vesicle transport within cells.Read moreRead less
Uncovering the molecular mechanisms of potassium channel activity. The aim of this project is to determine the mechanisms of protein-mediated potassium ion transport across cell membranes. It will combine advanced simulations, structural biology and electrophysiology to describe the detailed molecular processes underscoring calcium-activated potassium channel conduction, gating and inactivation. The expected outcome is an improved description of how ion channels recognise and respond to physiolo ....Uncovering the molecular mechanisms of potassium channel activity. The aim of this project is to determine the mechanisms of protein-mediated potassium ion transport across cell membranes. It will combine advanced simulations, structural biology and electrophysiology to describe the detailed molecular processes underscoring calcium-activated potassium channel conduction, gating and inactivation. The expected outcome is an improved description of how ion channels recognise and respond to physiological stimuli to control electrical signalling the body. Our results will provide benefits in the form of basic understanding relevant to ion transport phenomena in biological systems, and atomic-level views of nervous system function to guide future directions in pharmacology.Read moreRead less
Keeping forces local for epithelial homeostasis. This project probes how epithelial cells use mechanical forces to communicate with one another in biological life. It tests the novel concept that negative feedback is a critical, hitherto unappreciated dimension in mechanical communication, which acts to ensure proportionate responses for homeostasis. It will generate fundamental new knowledge in biology using an innovative combination of cellular and biophysical experiments and physical theory. ....Keeping forces local for epithelial homeostasis. This project probes how epithelial cells use mechanical forces to communicate with one another in biological life. It tests the novel concept that negative feedback is a critical, hitherto unappreciated dimension in mechanical communication, which acts to ensure proportionate responses for homeostasis. It will generate fundamental new knowledge in biology using an innovative combination of cellular and biophysical experiments and physical theory. The expected outcomes are fundamental new knowledge, interdisciplinary training for young scientists, new national research capacity and growing international collaborations. It will benefit Australia by enhancing its scientific world linkage, status in scientific leadership and research capacity.Read moreRead less
Dynamics of constrained Brownian motion of neuro-secretory vesicles. This project will shed light on a fundamental problem the mechanism of brain cell communication by use of quantitative biophotonics methods including laser tracking, optical tweezers and three dimensional fluorescence microscopy. This work will give valuable new clues to finally solve the dynamics of molecular interactions underpinning neuronal communication.