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Genetics And Biochemistry Of Biosynthesis Of The Cell Wall Of Mycobacteria
Funder
National Health and Medical Research Council
Funding Amount
$260,831.00
Summary
Mycobacteria commolnly cause human disease. The major killer in the group is Mycobacterium tuberculosis which annually causes millions of deaths from tuberculosis (TB) worldwide. Another pathogen from this group is Mycobacterium avium which often infects immunosuppressed people such as those with advanced HIV-AIDS. Mycobacteria have evolved a specialised wall that surrounds their cells which protects them from chemical attack from antibiotics and helps them to establish infections. The major ant ....Mycobacteria commolnly cause human disease. The major killer in the group is Mycobacterium tuberculosis which annually causes millions of deaths from tuberculosis (TB) worldwide. Another pathogen from this group is Mycobacterium avium which often infects immunosuppressed people such as those with advanced HIV-AIDS. Mycobacteria have evolved a specialised wall that surrounds their cells which protects them from chemical attack from antibiotics and helps them to establish infections. The major antibiotic used for TB stops cells from synthesising the protective layer thereby making them very vulnerable to human immune defences. Unfortunately, resistance to this antibiotic is common and new antibiotics are needed to treat mycobacterial infections. We are studying how mycobacteria make the cell wall and are looking for key steps where new drugs might be able to inhibit the process. Our approach is to inactivate genes in the mycobacteria that make the enzymes which control cell wall synthesis. The gene inactivation results in crippled mycobacteria that are unable to make proper cell walls. We analyse the cell wall changes that gene inactivation cause studying the chemical composition of the cell. This helps to identify the steps in cell wall biosynthesis and each step becomes a potential target for new drugs. Each of the weaken mycobacteria can be tested to see how well they can resist antibiotics and to see if they can survive host defences. In this way we can identify which components of the cell wall are critical for them to establish infections and resist antibiotic treatments. Enzymes that participate in the synthesis of such components are prime targets for us to concentrate on to design new antibiotics.Read moreRead less
The Role Of HIV Infection Of Astrocytes In The Development Of HIV Associated Dementia
Funder
National Health and Medical Research Council
Funding Amount
$144,250.00
Summary
Dementia is an extremely common problem in the late stages of Human Immunodeficiency Virus (HIV) infection. HIV-associated dementia is the most common cause of dementia in people under 40 years of age. Despite the development of very good drugs to attack the virus, HIV-associaed dementia continues to be a major clinical problem. We are looking at the reasons why some people infected with HIV become demented and others do not. We are also looking at how best to prevent the development of dementia ....Dementia is an extremely common problem in the late stages of Human Immunodeficiency Virus (HIV) infection. HIV-associated dementia is the most common cause of dementia in people under 40 years of age. Despite the development of very good drugs to attack the virus, HIV-associaed dementia continues to be a major clinical problem. We are looking at the reasons why some people infected with HIV become demented and others do not. We are also looking at how best to prevent the development of dementia. We believe that astrocytes (an important brain cell that supports neurons) play a very important role in the development of HIV-associated dementia. With an improved understanding of the steps leading to dementia we can better plan treatments to prevent the development of this devastating complication of HIV-AIDS.Read moreRead less
Visualisation Of Gamma-delta T Cell Responses In Cutaneous Inflammation
Funder
National Health and Medical Research Council
Funding Amount
$570,876.00
Summary
Mycobacterial infections remain a major burden of modern society. This proposal aims to define the role of an understudied immune cell subset, gamma-delta T cells, in the response against mycobacteria. We will use cutting-edge multi-photon imaging to track these cells in real-time directly within infected tissues. This will facilitate generating a new vista of anti-mycobacterial immune responses and may aid the development of improved vaccines.
Modelling The Interaction Between Sexually Transmitted Infections And HIV Transmission To Inform Public Health Policy
Funder
National Health and Medical Research Council
Funding Amount
$543,624.00
Summary
Other sexually transmitted infections (STIs) increase the risk of acquiring or transmitting HIV. Using mathematical models the population level effects of this increased risk will be investigated. This work will inform the design of effective and efficient STI treatment programs that aim to reduce the number of HIV infections in Australian gay men, prevent HIV epidemics in Aboriginal and Torres Strait Island communities, and slow the growth of HIV in Papua New Guinea.
Investigating The Interface Between Host Innate Immune Cells And A Fungal Pathogen
Funder
National Health and Medical Research Council
Funding Amount
$578,085.00
Summary
Fungi which infect humans are a major health problem, especially for those with compromised immune systems (eg. AIDS, transplant and cancer patients). These fungi cause disease by evading the immune system whilst deriving nutrients for growth. Some fungi evade the immune system by residing within host cells; a hostile and nutrient poor environment. This project will study a pathway that we have shown is required for growth inside host cells. This knowledge will open new avenues for treatment.
Molecular Mechanisms Of Intracellular Growth, Survival And Pathogenicity
Funder
National Health and Medical Research Council
Funding Amount
$335,816.00
Summary
Fungi which infect humans are a major health problem, especially for those with compromised immune systems (eg. AIDS, transplant and cancer patients). These fungi cause disease by evading the immune system whilst deriving nutrients for growth. Some fungi evade the immune system by residing within host cells; a hostile and nutrient poor environment. This project will study a pathway that we have shown is required for growth inside host cells. This knowledge will open new avenues for treatment.
I am a medical epidemiologist investigating links between specific infectious agents and specific types of cancer in immune deficient populations. Through the exploration of these relationships, my research aims to allow the prevention of these types of c
Monogamy As An HIV And STI Prevention Strategy For Gay Men
Funder
National Health and Medical Research Council
Funding Amount
$407,506.00
Summary
Monogamy is relatively common among Australian gay men and yet relatively under researched or explored. At present we know little about the motivations of Australian gay men to enter and maintain monogamous relationships. This study will bring into clear view a phenomenon, and social and intimate practice, that has been almost entirely overlooked and will significantly advance our understanding of the dynamics of gay men's sexual behaviour and sexual cultures.
Elucidating The Mechanism Of Action Of Dendrimer Nanoparticles Against HIV
Funder
National Health and Medical Research Council
Funding Amount
$559,354.00
Summary
Dendrimers are nanoparticles with highly branched structures and they are being developed as topical microbicides to prevent the sexual transmission of HIV. This study will determine how dendrimers block HIV entry into host cells so that we can design more effective inhibitors and microbicides.