Smoking Cessation And Bone Health: Observational And Intervention Studies In Twins And A Quitline Population
Funder
National Health and Medical Research Council
Funding Amount
$639,050.00
Summary
Osteoporosis is a major health problem that causes bones to break (fracture) easily. Many bones are susceptible, with hip fractures being the worst outcome of osteoporosis. They cause pain, disability, require major health interventions (surgery and rehabilitation), lead to death in about 20% of cases, and the overall care of hip fracture patients is very expensive. Osteoporosis is treated to reduce the risk of fractures. The prevention and treatment of osteoporosis should include avoidance of f ....Osteoporosis is a major health problem that causes bones to break (fracture) easily. Many bones are susceptible, with hip fractures being the worst outcome of osteoporosis. They cause pain, disability, require major health interventions (surgery and rehabilitation), lead to death in about 20% of cases, and the overall care of hip fracture patients is very expensive. Osteoporosis is treated to reduce the risk of fractures. The prevention and treatment of osteoporosis should include avoidance of factors known to bring on or worsen the condition. Smokers are known to have an increased risk of osteoporosis and fractures. However, it is not known how smoking brings on osteoporosis. Importantly, neither is it clear whether quitting smoking leads to improved bone health (and a reduced risk of fractures). These are important questions for the community in general and for smokers with osteoporosis in particular. We will endeavour to answer these questions by studying twins who do and do not smoke and by observing what happens to measures of bone health (bone mineral density and other factors) in people attempting to quit smoking. New information gained from these studies may lead to better ways of avoiding or treating the damage that smoking does to bone. We may also become able to predict the benefit to bone when people quit smoking.Read moreRead less
Mechanisms Of Negative Feedback Regulation Of GnRH By Testosterone In Males
Funder
National Health and Medical Research Council
Funding Amount
$243,336.00
Summary
This project will improve our knowledge of the hormonal control of reproduction in males. The hormone testosterone, produced by the testes, acts on the brain to control the secretion of a substance called gonadotrophin releasing hormone (GnRH). GnRH acts on a small gland at the base of the brain to cause the production of hormones called gonadotrophins, that are essential for reproduction. These gonadotrophins act on the testes to ensure the production of sperm and other hormones, including test ....This project will improve our knowledge of the hormonal control of reproduction in males. The hormone testosterone, produced by the testes, acts on the brain to control the secretion of a substance called gonadotrophin releasing hormone (GnRH). GnRH acts on a small gland at the base of the brain to cause the production of hormones called gonadotrophins, that are essential for reproduction. These gonadotrophins act on the testes to ensure the production of sperm and other hormones, including testosterone. We plan to determine how testosterone acts on the brain to control GnRH secretion. To do this we will use male sheep and conduct a series of experiments designed to show where in the brain testosterone acts to ultimately affect the nerve cells that produce GnRH. Testosterone and similar compounds are increasingly being used as treatments for infertility, as a male contraception and misused as anabolic steroids. A thorough knowledge of how testosterone acts in the brain is necessary to improve treatments for reproductive disorders and ultimately to improve reproductive health in men.Read moreRead less