Chronic periodontitis is a bacterial-associated inflammatory disease of the supporting tissues of the teeth, which results in the destruction of tooth support and ultimately leads to tooth loss. The disease is a major public health problem with a large economic burden. The bacterium Porphyromonas gingivalis has been identified as a major pathogen in the development of chronic periodontitis. We have identified and characterised a major virulence factor of P. gingivalis; a complex of proteins whic ....Chronic periodontitis is a bacterial-associated inflammatory disease of the supporting tissues of the teeth, which results in the destruction of tooth support and ultimately leads to tooth loss. The disease is a major public health problem with a large economic burden. The bacterium Porphyromonas gingivalis has been identified as a major pathogen in the development of chronic periodontitis. We have identified and characterised a major virulence factor of P. gingivalis; a complex of proteins which is involved in binding and destruction of host tissue. We have shown that this protein complex when used as a vaccine protects against P. gingivalis induced disease in animal periodontitis models. We have identified the regions (peptides) of the protein complex that allow the bacteria to bind to host tissue and blood proteins and these and other complex-related peptides when used as vaccines reduced disease in animal models. Recently, a consortium involving T.denticola, T.forsythia and P.gingivalis has been closely associated with the development of periodontitis in humans. We have shown that a mixture of these bacteria have greater pathogenicity in an animal periodontitis model than any one bacterium individually at the same total dose. The aim of this project is to identify epitopes in T. denticola and T. forsythia and to combine them with those of P. gingivalis into a multipathogen vaccine using techniques we have patented. The efficacy of the multipathogen vaccine to produce an immume response which is effective against the three bacteria will be investigated. The significance of this work is that we will produce a fully synthetic vaccine that may have utility in the prevention of periodontitis and the platform technology developed may have utility for a range of diseases associated with multiple bacterial pathogens.Read moreRead less
Environmental, Socio-behavioural And Biological Predictors Of Early Childhood Caries: A Rural Birth Cohort Study
Funder
National Health and Medical Research Council
Funding Amount
$495,432.00
Summary
In Australia, up to 75% of children have dental decay at five years of age. It is substantially worse in rural parts of Australia, where fluoride is not added to the water supply. Also, the rate of caries increases as socioeconomic status decreases. This study aims to describe the natural history of dental caries from birth to 18 months. It will also examine the environment, behaviours and biology that these infants are exposed to. This data has never been collected before and will therefore pro ....In Australia, up to 75% of children have dental decay at five years of age. It is substantially worse in rural parts of Australia, where fluoride is not added to the water supply. Also, the rate of caries increases as socioeconomic status decreases. This study aims to describe the natural history of dental caries from birth to 18 months. It will also examine the environment, behaviours and biology that these infants are exposed to. This data has never been collected before and will therefore provide a unique contribution to our knowledge and understanding of the development of dental decay in young children. This data is crucial for the development of interventions to prevent dental decay and address health inequalities. The study will examine infants teeth as they come into their mouths and collect questionnaire and saliva data from parents and infants following birth at 1, 6, 12 and 18 months. It is a partnership between the maternal and child health nurses of the western rural areas of Victoria (Ballarat, Ararat, Stawell and Horsham) and a national team of child health, dental researchers and statisticians drawn from the School of Health and Social Development at Deakin University, the Murdoch Children's Research Institute and The Royal Children's Hospital's Department of Paediatric Dentistry, The University of Melbourne, The University of Western Australia, Griffith University and the Queensland Government. The proposed study will make a substantial contribution to the understanding of early childhood caries by providing unique data on its natural history, the relationship between caries and risk and protective factors and the relative contribution of these factors to dental decay. Additionaly, it will include the latest measurement developments for quantifying microflora species and clinical caries outcomes. The comprehensiveness of this approach has been called for internationally, but has not yet been attempted.Read moreRead less