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Role Of The Tissue Kallikrein-kinin System In Abdominal Aortic Aneurysm Formation And Progression
Funder
National Health and Medical Research Council
Funding Amount
$457,779.00
Summary
Up to 5% of people over 60 years develop weakening of their aorta leading to slow dilation of the vessel, which may burst resulting in sudden death. The only treatment is surgery, which has complications and is unsuitable for some patients. Drugs which slow the disease would be invaluable. We have identified a role for kinins in aneurysms. We will investigate how these molecules contribute to aortic disease and if blocking them can be used as a basis for medical treatment of artery weakening.
The West Nile Viral Protease, NS3: A Target For Antiviral Drug And Vaccine Design
Funder
National Health and Medical Research Council
Funding Amount
$230,500.00
Summary
The West Nile Virus (WNV) was first isolated from a woman in the West Nile region of Uganda in 1937. It is one of ~70 known flaviviruses (e.g. Dengue fever, Yellow fever, West Nile, Kunjun, Japanese encephalitis, St. Louis encephalitis, tick-borne encephalitis, Australian encephalitis and the related hepatitis C virus) which annually infect hundreds of millions of people worldwide, particularly in tropical and sub-tropical areas, and cause major public health problems. WNV is endemic in the Midd ....The West Nile Virus (WNV) was first isolated from a woman in the West Nile region of Uganda in 1937. It is one of ~70 known flaviviruses (e.g. Dengue fever, Yellow fever, West Nile, Kunjun, Japanese encephalitis, St. Louis encephalitis, tick-borne encephalitis, Australian encephalitis and the related hepatitis C virus) which annually infect hundreds of millions of people worldwide, particularly in tropical and sub-tropical areas, and cause major public health problems. WNV is endemic in the Middle East, parts of Africa and Europe, but recent epidemics in Israel (1998), Romania (1996), United States (1999), and UK (2003) have been characterized by severe symptoms , severe neurological pathology, and fatalities. In the USA alone there were 4,156 infections and 284 deaths in 2002, 9122 infections and 223 deaths in 2003, and this mosquito borne virus has quickly spread since 1999 through all USA states and into Canada and Mexico (http:--www.cdc.gov-ncidod-dvbid-westnile-index.htm). No treatments or vaccines are available. This project focuses on an enzyme, known as the West Nile Virus NS3 protease, that is essential for replication of the virus. By studying the enzyme in the laboratory we can design small molecules that can block its function and these have real potential as leads for development of drug treatments for people infected by this virus. A precedent is the success of inhibitors of HIV-1 protease that are the most effective treatment for humans with HIV-infections. Our studies will also be used to develop potential vaccines. The science involves experts on protease enzymes, drug design and development, virology including West Nile virology, and vaccine development. We expect to generate drug and vaccine candidates and new information for their development that is at the cutting edge of West Nile Virus research.Read moreRead less
The Role Of Proteinase Inhibitor 9 In Cytotoxic Lymphocyte Function
Funder
National Health and Medical Research Council
Funding Amount
$820,136.00
Summary
Cytotoxic lymphocytes eliminate virus-infected or cancerous cells from the body. This is achieved by the release of powerful cytotoxins that kill the abnormal cell. Unless carefully targeted these cytotoxins can damage surrounding normal tissue or the cytotoxic lymphocyte itself, and lead to autoimmune disease. One of the most important cytotoxins is a protease called granzyme B. We have discovered a natural inhibitor of granzyme B that is present in cytotoxic cells and testis. Our studies are a ....Cytotoxic lymphocytes eliminate virus-infected or cancerous cells from the body. This is achieved by the release of powerful cytotoxins that kill the abnormal cell. Unless carefully targeted these cytotoxins can damage surrounding normal tissue or the cytotoxic lymphocyte itself, and lead to autoimmune disease. One of the most important cytotoxins is a protease called granzyme B. We have discovered a natural inhibitor of granzyme B that is present in cytotoxic cells and testis. Our studies are aimed at understanding the role of the inhibitor in human immune and reproductive function. We will also design and evaluate synthetic compounds based on the natural inhibitor that will enable us to easily measure granzyme B levels and control its activity.Read moreRead less
Proteinase Inhibitor 6: A Multifunctional Intracellular Serpin
Funder
National Health and Medical Research Council
Funding Amount
$217,435.00
Summary
We have discovered and characterized an unusual protease inhibitor that is widely distributed in the body. We have shown that the inhibitor is present in immune cells that are responsible for fighting bacterial infection, and that its role is probably to protect these cells against a powerful endogenous protease produced to destroy ingested bacteria. The inhibitor probably has additonal roles because it is present in developing and adult brain, skin and other blood cells. In these tissues we hav ....We have discovered and characterized an unusual protease inhibitor that is widely distributed in the body. We have shown that the inhibitor is present in immune cells that are responsible for fighting bacterial infection, and that its role is probably to protect these cells against a powerful endogenous protease produced to destroy ingested bacteria. The inhibitor probably has additonal roles because it is present in developing and adult brain, skin and other blood cells. In these tissues we have evidence that inhibitor regulates other, unidentified, proteases. The purpose of this grant is to identify these proteases, and to elucidate the physiological significance of the inhibitor by studying mice that lack it.Read moreRead less