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Functional Evaluation Of BRCA1 & BRCA2 Unclassified Sequence Variants And Identification Of Critical Pathogenic Domains.
Funder
National Health and Medical Research Council
Funding Amount
$331,312.00
Summary
The major genes that predispose to hereditary breast cancer are called BRCA1 and BRCA2. Most mutations in these genes cause the protein product to be truncated and inactive. However there are many families in which such truncating mutations are not found, but instead there are sequence changes that slightly alter the protein product. It is often difficult to predict whether these sequence variants are likely to cause hereditary breast cancer simply by looking at the position and nature of the se ....The major genes that predispose to hereditary breast cancer are called BRCA1 and BRCA2. Most mutations in these genes cause the protein product to be truncated and inactive. However there are many families in which such truncating mutations are not found, but instead there are sequence changes that slightly alter the protein product. It is often difficult to predict whether these sequence variants are likely to cause hereditary breast cancer simply by looking at the position and nature of the sequence change. Consequently, it is not possible to offer informative genetic counselling to these women or their at-risk family members. Assessment of the potential pathogenicity and functional significance of these unclassified sequence variants will be directly useful with regard to the clinical management of these women and their families, and will develop our current understanding of how different domains of these genes contribute to their role as cancer susceptibility genes.Read moreRead less
Evaluation Of Unclassified Variants Of BRCA1 And BRCA2 Using A Multifactorial Approach
Funder
National Health and Medical Research Council
Funding Amount
$456,495.00
Summary
The major genes that predispose to hereditary breast cancer are called BRCA1 and BRCA2. Most mutations in these genes cause the protein product to be truncated and inactive. However there are many families in which such truncating mutations are not found, but instead there are sequence changes that may slightly alter the protein product. It is often difficult to predict whether these sequence variants are likely to cause hereditary breast cancer simply by looking at the position and nature of th ....The major genes that predispose to hereditary breast cancer are called BRCA1 and BRCA2. Most mutations in these genes cause the protein product to be truncated and inactive. However there are many families in which such truncating mutations are not found, but instead there are sequence changes that may slightly alter the protein product. It is often difficult to predict whether these sequence variants are likely to cause hereditary breast cancer simply by looking at the position and nature of the sequence change. Consequently, it is not possible to offer informative genetic counselling to these women or their at-risk family members. Assessment of the potential pathogenicity and functional significance of these unclassified sequence variants will be directly useful with regard to the clinical management of these women and their families, and will develop our current understanding of how different domains of these genes contribute to their role as cancer susceptibility genes. In addition, some of our experiments to classify variants may be useful as a screening tool to identify carriers of mutations, and so prioritize them for mutation screening.Read moreRead less
The human hepatitis B virus (HBV) is a member of the hepadnavirus family that includes a number of other very similar host-specific viruses. Acute HBV infection can produce extreme variation in disease, ranging from asymptomatic infection, to acute transient hepatitis with jaundice, or fulminant hepatitis leading to liver failure (Hollinger, 1996). The identification of viral genes that affect the severity of disease is a major current goal in medical virology. For example, there is considerable ....The human hepatitis B virus (HBV) is a member of the hepadnavirus family that includes a number of other very similar host-specific viruses. Acute HBV infection can produce extreme variation in disease, ranging from asymptomatic infection, to acute transient hepatitis with jaundice, or fulminant hepatitis leading to liver failure (Hollinger, 1996). The identification of viral genes that affect the severity of disease is a major current goal in medical virology. For example, there is considerable interest in identifying the genes of the influenza genome responsible for high mortality outbreaks; with the human immunodeficiency virus, the virus that causes AIDS, variants deleted in the nef gene region cause a less rapidly progressing infection and have attracted attention as a possible prototype for an attenuated vaccine. We propose to investigate how the different genes of hepadnaviruses affect the course of infection and type of disease produced. Studies will be performed in ducks infected with the duck hepatitis B virus (DHBV) as these animals provide the only model system available in Australia. We will study both experimentally and naturally derived DHBV variants to explore the effects of genetic changes on the outcome of infection. This will enhance our understanding of this virus family and will provide models for comparison with HBV infection. This knowledge may then contribute to our ability to manage and control HBV disease in humans.Read moreRead less
Genetic Pathology Of Roquin In Human Autoimmune Disease
Funder
National Health and Medical Research Council
Funding Amount
$495,466.00
Summary
Lupus is a life-threatening disease in which immune responses normally targeted at germs are directed at tissue in the body. We have discovered a mouse model of lupus and elucidated an important pathway that determines whether immunity is directed at the body or at germs. Building on recent progress in understanding the genetic variation between individuals, we will use the information obtained from the mouse model to investigate the genes that regulate this pathway in people with lupus.
The Organisation Of The Chromosome Into Distinct Epigenetic Domains And Its Link With Development And Disease
Funder
National Health and Medical Research Council
Funding Amount
$521,591.00
Summary
This investigation will show that a key cellular mechanism that determines how the chromosome is organised into stable domains is by changing the make-up of chromosomal domains through the replacement of histone proteins with specialised forms of histones called variants . This fundamental research will provide important new information on how chromosomes become unstable in cancer.
Regulation Of The Histone Code By Histone Variants
Funder
National Health and Medical Research Council
Funding Amount
$589,425.00
Summary
A fundamental unanswered question in biology is how a single fertilized mammalian cell can differentiate into a multicellular organism when every differentiated cell type inherits the same DNA. Fundamental to this development process is that different sets of genes are expressed in different cell types. This investigation will show that a key mechanism to regulate gene expression is the way our DNA is covered with specifically modified and altered forms of histone proteins.