The Emergence Of Dead Enzymes As Signal Transducers And Therapeutic Targets
Funder
National Health and Medical Research Council
Funding Amount
$463,652.00
Summary
The cells within our bodies are constantly being replenished by new cells. Removal of old cells is typically fast and without fanfare. However, in some cases, cell death can be used to evoke an inflammatory response. My work examines the molecular details of how this happens and how we might advance our knowledge to develop novel drugs to prevent inflammatory diseases, such as Crohn's disease and psoriasis.
Imaging the T cell signalling machinery . The conversion of external stimuli to the interior of a cell is a fundamental process that underpins many unique facets of biology, including cellular movement, nerve transmission, response to hormones and immune recognition. However, the basic mechanism by which such signals are transmitted across cellular membranes is poorly understood. This proposal will seek to bridge this gap in our knowledge by imaging a multi-component “decision-making” machine th ....Imaging the T cell signalling machinery . The conversion of external stimuli to the interior of a cell is a fundamental process that underpins many unique facets of biology, including cellular movement, nerve transmission, response to hormones and immune recognition. However, the basic mechanism by which such signals are transmitted across cellular membranes is poorly understood. This proposal will seek to bridge this gap in our knowledge by imaging a multi-component “decision-making” machine that controls whether or not the immune system becomes activated. Accordingly, this proposal will provide far-reaching insights into molecular events that are of central importance to the initiation of immunity, and thus will ultimately benefit society via improvements in health.Read moreRead less
Intramembrane Mechanics of Immunoreceptor Signalling. The cells of the immune system constantly survey the body for markers of injury and infection through molecular sensors that are responsive to the presence of pathogens, tumours and damaged cells. The goal of this project is to understand how the mechanical action of these molecular sensors direct the transmission of information to the cell interior.
Metabolite regulation of mitochondrial fission. This project aims to understand how the function and health of mitochondria – the energy producing structures in cells - are controlled by fat molecules. The project expects to integrate cutting edge techniques and instrumentation to generate new knowledge of how fat molecules interact with, and influence, enzymes that control how cells maintain their mitochondria in response to nutrient state. An anticipated goal is to define a fingerprint for enz ....Metabolite regulation of mitochondrial fission. This project aims to understand how the function and health of mitochondria – the energy producing structures in cells - are controlled by fat molecules. The project expects to integrate cutting edge techniques and instrumentation to generate new knowledge of how fat molecules interact with, and influence, enzymes that control how cells maintain their mitochondria in response to nutrient state. An anticipated goal is to define a fingerprint for enzymes regulated by fat molecules that will be of great interest to researchers across many branches of life sciences. Expected outcomes and benefits will be deeper understanding of fat molecules as nutrient signalling metabolites, and how they influence cell metabolism, growth and development.Read moreRead less
Exceptions Prove the Rule: How Antigen Recognition Drives T cell Activation. CD8+ T cells are immune cells that are critical for the adaptive immune response, which is central to immune function in vertebrates. CD8+ T cells mediate their effector functions only after activation, which occurs via T cell receptor (TCR) recognition of foreign antigens. Here, unique reagents and sophisticated technologies will be used to define precisely how the nature of TCR-antigen recognition impacts on T cell ac ....Exceptions Prove the Rule: How Antigen Recognition Drives T cell Activation. CD8+ T cells are immune cells that are critical for the adaptive immune response, which is central to immune function in vertebrates. CD8+ T cells mediate their effector functions only after activation, which occurs via T cell receptor (TCR) recognition of foreign antigens. Here, unique reagents and sophisticated technologies will be used to define precisely how the nature of TCR-antigen recognition impacts on T cell activation and effector function. This work builds on an earlier identification of an entirely novel mode of TCR-antigen recognition, and its success will establish novel paradigms in T cell biology and represent a key advance in knowledge in the life sciences.Read moreRead less
Defining the molecular architecture of a lymphocyte-activating receptor complex. A robust immune response requires activation of sentinel T cells. This project will seek to understand the architecture of receptors at the T cell surface that allow these important immune cells to sense the presence of pathogens that react accordingly.
Only recently has it emerged that our cells have a built-in backup mechanism that instructs cells to die in extreme cases, such as when viruses have hijacked a cell. A misfiring backup mechanism is thought to underlie a number of human diseases, including inflammatory disease. Our investigation will establish a starting point for the development of novel anti-inflammatory drugs.
A molecular investigation into the naïve T cell repertoire. This project aims to interrogate the relationship between T cell receptor (TCR) recognition modes and T cell recruitment and activation. CD8+ T cells are important for adaptive immunity. Their recognition, via TCR, of peptides bound to MHC class I antigen-presenting molecules (pMHCI), initiates a signalling cascade which activates T cells effector functions. All structural information on TCR recognition of pMHCI is based on TCRs prevale ....A molecular investigation into the naïve T cell repertoire. This project aims to interrogate the relationship between T cell receptor (TCR) recognition modes and T cell recruitment and activation. CD8+ T cells are important for adaptive immunity. Their recognition, via TCR, of peptides bound to MHC class I antigen-presenting molecules (pMHCI), initiates a signalling cascade which activates T cells effector functions. All structural information on TCR recognition of pMHCI is based on TCRs prevalent in immune responses, and all recognise pMHCI using a conserved orientation. This project aims to use this observation to study the relationship between TCR recognition modes and T cell recruitment and activation.Read moreRead less
Inhibiting pathological signalling in haematopoietic disease. Certain leukaemias and other blood diseases are caused by the mutation of one particular molecule, called Janus Kinase (JAK), inside our bodies. This project aims to understand the biochemical details of these diseases by studying this mutated molecule in detail. The project will aim to provide the information for developing effective therapeutics against these diseases.
Novel mechanisms controlling signaling by adenosine monophosphate-activated protein kinase, central regulator of energy homeostasis. Sedentary lifestyles and consumption of high energy foods have led to dramatic increases in the incidence of obesity-related metabolic diseases such as type 2 diabetes and cardiovascular disease, placing enormous financial and medical burden on the Australian economy. An attractive drug target to treat these diseases is AMP-activated protein kinase (AMPK), which fu ....Novel mechanisms controlling signaling by adenosine monophosphate-activated protein kinase, central regulator of energy homeostasis. Sedentary lifestyles and consumption of high energy foods have led to dramatic increases in the incidence of obesity-related metabolic diseases such as type 2 diabetes and cardiovascular disease, placing enormous financial and medical burden on the Australian economy. An attractive drug target to treat these diseases is AMP-activated protein kinase (AMPK), which functions as both a cellular fuel gauge and co-ordinator of whole-body metabolism. Building on recent breakthroughs made at St. Vincent's Institute, this project will produce innovative research into novel mechanisms that control AMPK. These discoveries will greatly increase our understanding of AMPK regulation by cellular processes, and aid the design of more effective AMPK drugs.Read moreRead less