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Microtubule Capture By E-cadherin: A Novel Mechanism For Dynamic Cell-cell Adhesion.
Funder
National Health and Medical Research Council
Funding Amount
$439,500.00
Summary
This project studies the molecular mechanisms responsible for holding cells together in normal tissues. Such cell-to-cell adhesion is mediated by the cadherin family of molecules, which reside at the surfaces of cells. Cadherins allow cells to recognize one another and, upon recognition, adhere to one another. By this means populations of individual cells can be linked together into cohesive populations (i.e. the tissues or organs of the body). The importance of cadherin adhesion is exemplified ....This project studies the molecular mechanisms responsible for holding cells together in normal tissues. Such cell-to-cell adhesion is mediated by the cadherin family of molecules, which reside at the surfaces of cells. Cadherins allow cells to recognize one another and, upon recognition, adhere to one another. By this means populations of individual cells can be linked together into cohesive populations (i.e. the tissues or organs of the body). The importance of cadherin adhesion is exemplified by the well-documented observation that disruption of cadherin adhesion contributes to many important diseases, including inflammation of epithelia and cancers. Thus understanding the mechanisms by which cadherins hold cells together is necessary for us to understand the molecular basis of commondisease. It has long been known that cadherins work in cooperation with elements within the cell, called the cytoskeleton. My lab has recently made the novel discovery that microtubules, specific components of the cytoskeleton, can regulate the functionof cadherin adhesion molecules. Inparticular, microtubules appear to affect how cadherins can participate in dynamic cell processes necessary for cells to be properly organized in tissues. In this project we will probe the molecular mechanisms responsible for this effect of microtubules. The information obtained will provide important new insights into how dynamic cadherin adhesion is controlled, to help our understanding of the cellular mechanisms that couple cells into tissues, and how they may be disrupted in diesase.Read moreRead less
I am a cancer molecular and cell biologist determining the mechanisms of anticancer drug action and resistance in both childhood and adult malignancies. My research involves the development and investigation of both in vivo and in vitro models of resistan
Finding The Missing Katanin Required For Male Fertility
Funder
National Health and Medical Research Council
Funding Amount
$417,214.00
Summary
Microtubules are a key element of all cells, including in the male germ line. In this project we will define the function of the microtubule severing protein KATNA1 in male fertility. This will be achieved using a unique model and state-of-the-art technologies. This project will have immediate relevance to the 1 in 20 Australian men who suffer from infertility but will also inform KATNA1 function in the many other tissues where KATNA1 is produced.
Alzheimer's Disease And Related Disorders: Mechanism Of Tau Pathology In Established And Novel Transgenic Animal Models
Funder
National Health and Medical Research Council
Funding Amount
$423,017.00
Summary
Alzheimer's disease (AD) is a devastating neurodegenerative disease for which no cure is available. It affects more than 15 million people worldwide. There are estimates that by 2040, approximately 500'000 Australians will suffer from AD, with associated health costs of about 3% of the GDP. AD is characterized by two major brain lesions, beta-amyloid plaques and neurofibrillary tangles (NFTs). The latter contain a protein called tau which is in a fibrillar and highly phosphorylated state. We wer ....Alzheimer's disease (AD) is a devastating neurodegenerative disease for which no cure is available. It affects more than 15 million people worldwide. There are estimates that by 2040, approximately 500'000 Australians will suffer from AD, with associated health costs of about 3% of the GDP. AD is characterized by two major brain lesions, beta-amyloid plaques and neurofibrillary tangles (NFTs). The latter contain a protein called tau which is in a fibrillar and highly phosphorylated state. We were the first to establish a transgenic animal model of pre-tangles and, together with Dr. Hutton's laboratory, of NFT formation. We could further show that injections of beta-amyloid into brains of our tau mutant mice enhanced the NFT pathology in these mice. By Functional Genomics we identied genes and proteins, which are induced by tau expression. The specific aim of this proposal is to determine whether oxidative stress enhances the tau pathology in our tau mutant mice and whether distinct brain areas are particularly susceptible to this kind of stress. The reason for addressing this question is twofold: On the one hand, we have found in our mice that reactive oxygen species are increased, secondly it is known that some brain areas in the AD brain are degenerating, whereas others are not. A second aim is to develop novel tau transgenic models where individual interactions of tau with cellular proteins are disturbed. Finally, we want to determine whether the two kinases BMX and FAK and the phosphatase PPV regulate tau phosphorylation in vivo. Together, we hope that our efforts lead to a better understanding of the pathogenic mechanisms in AD and related disorders. As pathocascades are likely to be shared between a range of diseases, these findings may also contribute to other fields of research, such as Parkinson's disease. Ultimately, these efforts will assist in the development of a safe treatment of AD.Read moreRead less
Neurons are highly compartmentalized cell-types. In neurodegenerative diseases such as Alzheimer's disease, the protein Tau that serves a distinct function in one cellular compartment (the axon) accumulates in a massively phosphorylated form elsewhere (somatodendritic compartments and their spines) which is believed to impair neuronal functions. We will investigate how Tau is distributed in health and disease, and determine how this distribution is regulated.
I am a cell biologist who studies the molecular mechanisms that couple cells together into tissues in the body. These adhesion mechanisms are essential during development, support normal tissue turnover and are disrupted in human disease. My research aims to understand how cell adhesion functions normally and how it is disturbed in inflammation and cancer.
NOVEL MECHANISMS UNDERLYING THE SPREADING OF TAU PATHOLOGY IN ALZHEIMER’S DISEASE AND OTHER TAUOPATHIES
Funder
National Health and Medical Research Council
Funding Amount
$640,106.00
Summary
Alzheimer’s disease and related dementias affect 230,000 people in Australia, with numbers expected to grow to three times that by 2050. The direct costs for health and residential care alone already exceed $6.6 billion per annum. The underlying pathomechanisms and the processes that drive the progression of neurodegeneration in these devastating disorders remain largely unknown. Here, we will identify novel therapeutic targets and assist in developing therapies for yet incurable diseases.
Novel Pathomechanisms And Treatment Approaches In Alzheimer’s Disease And Related Forms Of Dementia
Funder
National Health and Medical Research Council
Funding Amount
$774,540.00
Summary
This fellowship will provide new insight into the molecular processes underlying onset and progression of common brain conditions, including Alzheimer’s disease, Frontotemporal dementia and Motor Neuron Disease. Furthermore, new therapeutic targets for these diseases will be developed and tested in model systems, to facilitate future translation into clinical application, and to overcome the lack of treatments.