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Infectious And Lifestyle Determinants Of Non-melanoma Skin Cancer.
Funder
National Health and Medical Research Council
Funding Amount
$983,711.00
Summary
Basal and squamous cell skin cancers are the leading cancers in Australia, with about 2% of the population developing them each year. As well as sun exposure, a number of other factors have been thought to effect these cancers. This study will examine if factors such as smoking, alcohol consumption and infection with certain skin related human papillomaviruses also increase their risk. Even a small effect may make a big difference when it comes to preventing these common cancers.
The Effect Of Exogenous Hormones, Smoking And HPV On The Incidence Of Screen Detected Pre-invasive Cervical Cancer.
Funder
National Health and Medical Research Council
Funding Amount
$1,201,168.00
Summary
Cervical cancer is one of the leading causes of cancer death in women internationally. About 15,000 women are detected in NSW annually as having pre-invasive cervical cancer (cervical intraepithelial neoplasia (CIN) grade I, II or III). Infection with certain high risk human papillomaviruses is known to be necessary for the development of cervical cancer. In addition, recent long term exposure to smoking and to hormonal contraception are two new factors considered as independent risk factors for ....Cervical cancer is one of the leading causes of cancer death in women internationally. About 15,000 women are detected in NSW annually as having pre-invasive cervical cancer (cervical intraepithelial neoplasia (CIN) grade I, II or III). Infection with certain high risk human papillomaviruses is known to be necessary for the development of cervical cancer. In addition, recent long term exposure to smoking and to hormonal contraception are two new factors considered as independent risk factors for the disease. Hormone replacement therapy (HRT) preparations taken around the menopause are a similar composition to hormonal contraceptives, (oestrogen and progestogen), therefore women on HRT may also be at increased risk. No comprehensive study exists internationally to measure the relative importance of these exogenous hormones on the development of pre-invasive cervical cancer in a way that is of public health relevance (e.g. recent long-term use of oral contraceptives and time since stopped, and among smokers and non-smokers). No Australian data are available on the proportion of women who are current users of hormonal contraceptives or HRT. No local prevalence data on the major high risk HPV subtypes (e.g. 16, 18, 33, 45) are available for Australia to describe its distribution and to inform the cervical screening program and future vaccine initiatives. The NSW Pap Test Register holds the screening history of all women on the cervical screening program, hence this is an ideal source for recruiting a representative sample into a study. We wish to conduct a large study of ~2600 NSW women using the NSW Pap Test Register to measure the relative importance of hormones, smoking and HPV infection on the development of CIN II or III.Read moreRead less
My work on human pigmentation genetics has provided a framework to understand normal variation in this physical trait and the associated genotypic risk factors for skin cancer development. The genes that determine an individual's skin phototype and the ce
Determination Of An Action Spectrum For Ultraviolet Radiation-induced Immunosuppression In Humans
Funder
National Health and Medical Research Council
Funding Amount
$213,500.00
Summary
Ultraviolet (UV) radiation causes mutations in the skin which can develop into cancers many years later. The skin's immune system is an important defence that prevents most potentially cancerous cells from developing into skin tumours. UV also suppresses skin immunity, allowing cancer cells to proliferate unchecked. There is also evidence that this UV-induced immunosuppression may have important effects on infectious diseases such as herpes virus, leprosy and tropical ulcers. Sunlight contains U ....Ultraviolet (UV) radiation causes mutations in the skin which can develop into cancers many years later. The skin's immune system is an important defence that prevents most potentially cancerous cells from developing into skin tumours. UV also suppresses skin immunity, allowing cancer cells to proliferate unchecked. There is also evidence that this UV-induced immunosuppression may have important effects on infectious diseases such as herpes virus, leprosy and tropical ulcers. Sunlight contains UVB, which causes sunburn, and UVA. Until recently, UVA was thought to have little effect on skin immunity. We have previously shown that both broadband UVB and UVA are immunosuppressive, even after single exposures equivalent to 8 minutes of sunlight. It is not known which UVA wavelengths are most immunosuppressive. These studies will use a xenon arc solar simulator and a series of interference filters to produce narrow UVB and UVA wavebands. The effects of these wavebands on humans can be studied by deliberately eliciting immune responses to substances which volunteers are already sensitive to. One model of skin immunity in these studies is allergy to nickel (in earrings and costume jewellery), which affects 10% of women. The volunteers' backs are exposed to different UV wavelengths, and then nickel patches are taped to both the UV-exposed areas and adjacent, unexposed areas. By comparing the intensity (redness and thickness) of these nickel reactions, immunosuppression caused by each waveband can be measured. Similarly, the Mantoux reaction (in people vaccinated against tuberculosis) provides another, complementary model of skin immunity. Knowledge of the immune effects of different UV wavelengths (an action spectrum for UV immunosuppression) would improve understanding of skin cancer and enable development of better sunscreens, which currently offer only partial immune protection.Read moreRead less
Effects Of Nevogenesis Susceptibility Genes And Phenotypic Correlation With Dermoscopic Characteristics Of Nevi
Funder
National Health and Medical Research Council
Funding Amount
$554,099.00
Summary
Melanoma is a form of skin cancer that arises from the cells that produce pigment and is a major public health issue in Australia. We will examine the relationship between the form, structure and colour of existing types of moles and their subsequent risk of developing into melanoma. This will be the first study to combine dermoscopy, a non-invasive examination technique, with DNA tests of the genes that determine skin, hair and eye colour, aiding in the early prediction and diagnosis of skin ca ....Melanoma is a form of skin cancer that arises from the cells that produce pigment and is a major public health issue in Australia. We will examine the relationship between the form, structure and colour of existing types of moles and their subsequent risk of developing into melanoma. This will be the first study to combine dermoscopy, a non-invasive examination technique, with DNA tests of the genes that determine skin, hair and eye colour, aiding in the early prediction and diagnosis of skin cancer.Read moreRead less
Overcoming Resistance Of Human Metastatic Melanoma To Treatment
Funder
National Health and Medical Research Council
Funding Amount
$727,758.00
Summary
Melanoma is a major Australian health problem, but there is no curative treatment once the disease spreads beyond the skin. I have been working on “overcoming resistance of melanoma to treatment” continuously for 10 years. My past research has provided a number of insights into the resistance of melanoma to treatment. I wish to extend my work to find new treatment approaches against the disease. If successful, this work will greatly benefit melanoma patients and Australian people.
The mechanisms controlling cell growth are often disrupted in cancers. Here we will investigate a fundamental mechanism that ensures that every daughter cells receives identical copies of DNA. This control mechanism also appears to have a key role in protecting the cells that continuously repopulate the epidermal layer ofthe skin that are target for ultraviolet radiation induced mutation that lead to skin cancers. This mechanism is inoperative in cells derived from skin cancers, indicating that ....The mechanisms controlling cell growth are often disrupted in cancers. Here we will investigate a fundamental mechanism that ensures that every daughter cells receives identical copies of DNA. This control mechanism also appears to have a key role in protecting the cells that continuously repopulate the epidermal layer ofthe skin that are target for ultraviolet radiation induced mutation that lead to skin cancers. This mechanism is inoperative in cells derived from skin cancers, indicating that mutation of components of this mechanism must have occurred. These mutations, and the loss of this normally protective control mechanism are likely to contribute to either an increased risk of skin cancer, or to the increased malignant spread of the diseases.Read moreRead less
Investigating The Utility Of Primary Care Skin Cancer Clinics In Queensland
Funder
National Health and Medical Research Council
Funding Amount
$187,000.00
Summary
Skin cancer is the most common cancer in Australia, with an estimated 375,000 people being treated for some skin cancer in Australia in 2002, and 1462 dying from the disease (mainly from melanoma) in 2001. Australia has the highest rate of skin cancer, both melanoma and non-melanoma is the world. However, if detected early, skin cancer is curable, and the focus of current treatment programs internationally is to detect the disease before it progresses to an advanced stage. A large proportion of ....Skin cancer is the most common cancer in Australia, with an estimated 375,000 people being treated for some skin cancer in Australia in 2002, and 1462 dying from the disease (mainly from melanoma) in 2001. Australia has the highest rate of skin cancer, both melanoma and non-melanoma is the world. However, if detected early, skin cancer is curable, and the focus of current treatment programs internationally is to detect the disease before it progresses to an advanced stage. A large proportion of skin cancers are first detected by the non-medical community. However, due to the two-tiered medical system in Australia, a person first seeks medical opinion from a general practitioner (GP), who acts as a gatekeeper for further treatment from a specialist. Therefore the ability of GPs to be able to discern which lesions require further treatment is crucial, both for the patient, and the financial burden on the health system. A recent development has been the establishment of dedicated primary skin care clinics, which offer open access consultations to the community for the diagnosis and treatment of skin cancers and pigmented lesions. The emergence of these clinics has created much debate in the medical media. Concern has been expressed about the skills of practitioners in these clinics, whilst others argue that sub-specialisation in primary care will lead to improvements in the management of patients. As there is currently no data on the volume, casemix and diagnostic accuracy of these clinics it is difficult to assess the diagnostic ability of skin cancer clinics. This will be the first project to quantify the role of skin clinics in the diagnosis of skin cancer in the community, and in particular their case volume, casemix and diagnostic accuracy, and assess these measures in relation to a comparable sample of general practitioners. Queensland is an ideal location for a study of this type due to its high incidence of both types of skin cancer.Read moreRead less
The TERT Locus As A Susceptibility Gene For Ovarian And Breast Cancer: Genetic And Functional Evaluation
Funder
National Health and Medical Research Council
Funding Amount
$394,601.00
Summary
Breast and ovarian cancer, which are among the commonest cancers in Australian women, share similar causes. We have found that a gene involved in maintaining the ends of chromosomes increases risk of ovarian cancer. The project aims to explore this further, and also to determine whether it also increases risk of breast cancer.
Targeted Redox Therapy For Photoageing Prevention And Treatment
Funder
National Health and Medical Research Council
Funding Amount
$562,815.00
Summary
Our goal is to target natural reduction/oxidation (redox) modifiers, i.e. niacin and sulforaphane, to the skin deeper layers to treat photoageing. Both drugs have been separately shown to prevent UV induced skin cancer. The outcomes of this project will be safer and more effective prevention and treatment of sun damaged skin. This project can provide health benefits to Australians from improved treatment of sun damage, and economic benefits to the nation.