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Non-neuronal ATP: Regulation Of Release And Action In The Bladder
Funder
National Health and Medical Research Council
Funding Amount
$451,553.00
Summary
Incontinence disorders are costly and debilitating. How the bladder signals the normal sensation of fullness as well as the urgent need to void urine (urgency) is still not fully understood. The signaling molecule ATP is released during bladder stretch. Using animal and human bladder, we will study how the bladder lining is involved in this signaling process, by measuring how bladder chemicals interact with stretch to modulate ATP release, and how ATP can influence nerve impulses to the brain.
Hormonal Modulation Of Prostatic Growth And Contractility
Funder
National Health and Medical Research Council
Funding Amount
$324,237.00
Summary
With increasing age human males are likely to develop benign prostatic hyperplasia (BPH), a disorder characterized by urethral obstruction due to an increase in size of the prostate gland. Drug treatments of this condition are not entirely satisfactory and the current project is to examine the mechanisms by which the prostate grows and occludes the urethra. We will use human prostate cells grown in artificial conditions to determine which hormones alter the types of cells and especially examine ....With increasing age human males are likely to develop benign prostatic hyperplasia (BPH), a disorder characterized by urethral obstruction due to an increase in size of the prostate gland. Drug treatments of this condition are not entirely satisfactory and the current project is to examine the mechanisms by which the prostate grows and occludes the urethra. We will use human prostate cells grown in artificial conditions to determine which hormones alter the types of cells and especially examine those cells which can contract as these may be of critical importance in the urethral obstruction. We hypothesize that an enzyme called protein kinase C may be implicitly involved in both cell growth and contractile function and we will examine the role of protein kinase C with a view ultimately to develop drugs which may interfere with this process and therefore aid in non-surgical treatment of the condition.Read moreRead less
Neurochemicals In The Control Of Human Bladder Function
Funder
National Health and Medical Research Council
Funding Amount
$196,018.00
Summary
The problem of urinary incontinence has received little attention from the medical and scientific research community until the last 10-15 years. Urinary incontinence can cause severe distress and is a taboo subject, even though it affects 30-40% of women. Public figures speak out about their experiences with breast cancer or heart disease, but not about leakage of urine. Elderly people with incontinence are forced into nursing homes, with major costs to the community. Incontinence is a major cli ....The problem of urinary incontinence has received little attention from the medical and scientific research community until the last 10-15 years. Urinary incontinence can cause severe distress and is a taboo subject, even though it affects 30-40% of women. Public figures speak out about their experiences with breast cancer or heart disease, but not about leakage of urine. Elderly people with incontinence are forced into nursing homes, with major costs to the community. Incontinence is a major clinical problem: although over 800 new patients per annum are seen at our Pelvic Floor Unit, the waiting time for a first appointment is 14-15 weeks. There are four main types of urine leakage: - stress incontinence (weak pelvic floor muscles); - overflow incontinence (seen in men with prostatic hypertrophy); - sensory urgency (frequent, uncomfortable desire to urinate); and - detrusor instability (bladder muscle spasms with leakage). We are primarily interested in detrusor instability and sensory urgency, which cause 35% of incontinence in general, but up to 85% of cases in the elderly. Patients suffer from an urgent desire to visit the toilet frequently, and may leak urine if they cannot reach the toilet quickly. Unlike stress incontinence, it cannot be corrected by pelvic floor surgery. Drug treatment is often unsuccessful, with many unacceptable side effects. In our research group, we have found that the sensory nerve which convey the sensation of bladder fullness, are overabundant and display increased amounts of neurochemicals. Our studies in isolated bladder muscle from these patients have shown abnormalities in responsiveness. Thus bladder from women with urge incontinence is resistant to drugs which abolish contraction in normal bladder. In this project we plan to find out why such changes occur. We will use new techniques to study bladder nerves and the receptors which convey the message to contract the bladder muscle.Read moreRead less