Molecular Characterisation Of Host Cell Targets Of Human Pathogenic Viruses And Evaluating Their Potential As Novel Therapeutic Targets.
Funder
National Health and Medical Research Council
Funding Amount
$307,946.00
Summary
There are currently no therapeutics to treat victims of Hendra, Nipah or Rabies virus infections, which account for > 50,000 deaths/yr worldwide. Through not fully understood mechanisms, these viruses affect the functions of specific cellular proteins in order to inhibit the host immune system, a process essential to their pathogenicity. We aim to characterise the mechanisms underlying viral inhibition of host immunity and evaluate their potential as novel targets to develop urgently needed t ....There are currently no therapeutics to treat victims of Hendra, Nipah or Rabies virus infections, which account for > 50,000 deaths/yr worldwide. Through not fully understood mechanisms, these viruses affect the functions of specific cellular proteins in order to inhibit the host immune system, a process essential to their pathogenicity. We aim to characterise the mechanisms underlying viral inhibition of host immunity and evaluate their potential as novel targets to develop urgently needed therapeutics against these deadly pathogens.Read moreRead less
A Potent Anti-HIV-1 Gene Therapy Agent In A Humanised Mouse Model
Funder
National Health and Medical Research Council
Funding Amount
$1,147,139.00
Summary
We have shown that a synthetic protein called Nullbasic can protect human cells from becoming infected by the AIDS virus, HIV-1. In this project a gene therapy approach will be used to test if a human immune system modified to contain Nullbasic is protected from HIV-1 in an animal model.
Improved Treatment Of Congenital Cytomegalovirus Disease Through Study Of Placental Models Of Pathogenesis
Funder
National Health and Medical Research Council
Funding Amount
$674,918.00
Summary
Congenital CMV is the second most common cause of fetal malformation in Australia, and yet most pregnant mothers do not know about it, nor how to prevent congenital CMV in their baby. It is a viral infection that can severely damage the unborn baby. Our research aims to find more about how the virus damages the baby, and whether antiviral drugs are useful in reducing infection of the baby, and also reducing damage to the baby from such infection. If successful, these studies will be the basis fo ....Congenital CMV is the second most common cause of fetal malformation in Australia, and yet most pregnant mothers do not know about it, nor how to prevent congenital CMV in their baby. It is a viral infection that can severely damage the unborn baby. Our research aims to find more about how the virus damages the baby, and whether antiviral drugs are useful in reducing infection of the baby, and also reducing damage to the baby from such infection. If successful, these studies will be the basis for clinical trials in pregnant women.Read moreRead less
Novel Early Detection Strategy For Liver Cancer Using Hepatitis B Splice Variants To Expediate Diagnosis And Improve Treatment Outcome
Funder
National Health and Medical Research Council
Funding Amount
$943,566.00
Summary
Hepatitis B virus (HBV) causes liver cancer, which is one of the only cancers that is increasing in prevalence. We have shown that smaller versions of HBV, termed splice variants, are even more strongly associated with liver cancer- people with higher levels of the splice variants were over 3 times more likely to have liver cancer. We will find out why, by thoroughly studying how the splice variants alter the virus and the host cell to promote liver cancer.
Successful HIV remission and cure, where patients can live normally without daily drug therapy and risk of transmitting infectious virus, will critically depend on understanding the mechanisms that control the expression of viral messenger RNA and proteins. This project further explores the mechanisms controling poorly understood steps in the proecssing of viral mRNA that are required for HIV protein produciton, and identifies new targets and strategies to drive HIV into permanent remission.
Worldwide >360 million people have chronic hepatitis B virus (HBV) infection that imparts a 25% lifetime risk of death due to serious liver disease. Current therapies for chronic HBV reduce levels of virus replication but fail to target the stable, nuclear episome, covalently closed circular DNA (cccDNA). The current study will determine what is required to eliminate cccDNA and how current therapies for chronic HBV infection should be modified to achieve this aim.
THE ROLE OF CELL SURFACE GLYCOSAMINOGLYCANS IN FLAVIVIRUS BIOLOGY: VIRUS ENTRY, TROPISM, VIRULENCE, AND ANTIVIRALS
Funder
National Health and Medical Research Council
Funding Amount
$493,764.00
Summary
The flaviviruses are a group of viruses mostly transmitted by the bite of infected mosquitoes or ticks to vertebrate hosts. They have a world-wide distribution and many flaviviruses are important human and veterinary pathogens. Dengue virus is the most important flavivirus in terms of disease frequency, causing >50 million cases of dengue fever, annually, in tropical and subtropical countries. It has been estimated that 2.5 billion people are at risk of dengue virus infection. Japanese enceph ....The flaviviruses are a group of viruses mostly transmitted by the bite of infected mosquitoes or ticks to vertebrate hosts. They have a world-wide distribution and many flaviviruses are important human and veterinary pathogens. Dengue virus is the most important flavivirus in terms of disease frequency, causing >50 million cases of dengue fever, annually, in tropical and subtropical countries. It has been estimated that 2.5 billion people are at risk of dengue virus infection. Japanese encephalitis virus is the most important causative agent of viral encephalitis in humans; >35,000 cases of Japanese encephalitis occur annually, with 30-50% mortality and frequent life-long neurological impairment among survivors. Murray Valley encephalitis virus is endemic in northern Australia where it gives rise, in most years, to a small number of human cases of sometimes fatal encephalitis. Dengue, Japanese encephalitis, and Murray Valley encephalitis viruses are a threat to human health in Australia. There is wide-spread speculation that climate change will affect the pattern of transmission of vector-borne pathogens; accordingly , the population at risk of flavivirus infection in Australia (and world-wide) may dramatically increase in future years. This project investigates the role of sulfated sugar molecules present abundantly on cellular surfaces in the biology of flaviviruses. It will address how the binding ability of medically important flaviviruses to these sulfated sugars impacts on the efficiency of virus entry into diverse cell types and, in turn, on the virus ability to cause disease. Ultimately, we aim to exploit the affinity of flavivirus particles to the sulfated sugar molecules on cellular surfaces; we will select synthetic mimetics of these sulfated sugars that block virus attachment to cells, and thus may identify antiviral compounds that may find application as therapeutic agents against flaviviral disease.Read moreRead less
Transport And Egress Of Herpes Simplex Virus In Neurones
Funder
National Health and Medical Research Council
Funding Amount
$592,023.00
Summary
Herpes simplex virus (HSV) enters the human body via the skin before entering the termini of nerve cell processes. It is transported along these processes to the body of the nerve cell. HSV lies dormant within these nerve cell bodies near the spinal cord in most people. Intermittently the virus reactivates and is transported back down the nerve cell processes to the skin where it causes blisters-ulcers or is shed without causing symptoms. The aim of this grant is to determine how HSV is transpor ....Herpes simplex virus (HSV) enters the human body via the skin before entering the termini of nerve cell processes. It is transported along these processes to the body of the nerve cell. HSV lies dormant within these nerve cell bodies near the spinal cord in most people. Intermittently the virus reactivates and is transported back down the nerve cell processes to the skin where it causes blisters-ulcers or is shed without causing symptoms. The aim of this grant is to determine how HSV is transported within nerve cells at the molecular level. Recent discoveries have shown how virus transport in nerve cells is dependent on interactions between specific viral proteins and cellular motor proteins and how the virus escapes from nerves to infect skin and cause disease. Such information on viral transport will allow development of inhibitors of this process which may be candidates for use as antivirals for control of recurrent herpes simplex. In addition, this information will allow the virus to be exploited for use in gene therapy to introduce DNA into human nerve cells to correct genetic abnormalities. Finally this data will assist in understanding similar mechanisms for other viruses transported in nerve cells such as those causing shingles and rabies.Read moreRead less
The Human Eukaryotic Translation Elongation Factor 1A Is A Paramyxovirus Virus Dependency Factor
Funder
National Health and Medical Research Council
Funding Amount
$585,497.00
Summary
Several paramyxoviruses cause respiratory disease in infants, young children and the elderly worldwide. Another paramyxovirus that can be contracted by people from infected horses, Hendra virus, is often fatal. There are currently no vaccines against these viruses, and treatment is generally limited to relief of symptoms. In this project we will uncover how these viruses use human proteins for their growth inside cells, with an aim to develop novel therapeutic strategies.
The Pathogenesis And Prevention Of Congenital Cytomegalovirus Disease
Funder
National Health and Medical Research Council
Funding Amount
$318,768.00
Summary
Cytomegalovirus (CMV) infection during pregnancy can have devastating effects on the developing baby, causing life-long disease and fetal death. Despite CMV being the most common infectious cause of fetal injury, there are significant gaps in our understanding of this congenital disease and no therapeutics available for use during pregnancy. This study will investigate the genetic molecular mechanisms by which CMV causes fetal injury and develop interventional therapies to reduce disease.