Participation Of Intrinsic Sensory Neurons In The Initiation Of Colonic And Gastric Reflexes
Funder
National Health and Medical Research Council
Funding Amount
$109,448.00
Summary
The gastrointestinal tract adjusts its digestive activity in response to the food that we eat. To do this, the bulk and chemical composition of the food and products of digestion must be sensed. In the small intestine, this sensing is by neurons in the wall on the intestine (intrinsic neurons) and by neurons with cells outside the intestine and endings in its wall (extrinsic neurons). There is evidence for there being intrinsic sensory neurons in the colon, subserving fewer functions than in the ....The gastrointestinal tract adjusts its digestive activity in response to the food that we eat. To do this, the bulk and chemical composition of the food and products of digestion must be sensed. In the small intestine, this sensing is by neurons in the wall on the intestine (intrinsic neurons) and by neurons with cells outside the intestine and endings in its wall (extrinsic neurons). There is evidence for there being intrinsic sensory neurons in the colon, subserving fewer functions than in the small intestine, but direct recordings from putative colonic intrinsic sensory neurons during sensory stimuli have not been made. The literature does not indicate whether there are intrinsic sensory neurons in the stomach. Some data suggests they may be present only in the antrum. It is important to determine whether there are intrinsic sensory neurons in the colon and stomach, which seems likely, to identify them morphologically and physiologically, and to investigate their responsiveness to physiological sensory stimuli. These data may be useful to understand the pathogenesis of functional bowel disorders, including delayed emptying in the stomach (which occurs in diabetes, for example) and slow transit constipation. Proper identification and characterisation of intrinsic sensory neurons might guide the development of therapies for disorders of colonic and gastric motility.Read moreRead less
ATP Release From Gastrointestinal Epithelium: A Potential Target For The Treatment Of Slow Transient Constipation
Funder
National Health and Medical Research Council
Funding Amount
$317,775.00
Summary
Slow transit constipation (STC) is a severe condition of the colon, almost exclusively affecting reproductive age women with no effective treatment. We recently found an association between STC and defects in connexin proteins in the large intestine. We aim to reveal the role of connexins and female hormones in the maintenance of normal intestinal function and their involvement in STC. The study will provide completely new perspectives in the understanding of the functional bowel disorders.
Development Of The GUTSTIM Device For The Treatment Of Intractable Constipation
Funder
National Health and Medical Research Council
Funding Amount
$380,746.00
Summary
We have developed a new treatment for chronic constipation that uses electrical stimulation through the skin similar to physiotherapy treatments for sports injuries. 20 million people (3% of children and 20% of the elderly) have chronic constipation. This proposal is to develop a simple purpose-built machine that has the best electronic properties for stimulating the intestine. The machine will be simple, easy to use and cheap, allowing safe use at home by children and the elderly.
Mechanical Factors In Normal Human Colonic Motility
Funder
National Health and Medical Research Council
Funding Amount
$650,023.00
Summary
Abnormal human colonic contractions cause significant medical, societal and financial burdens. Diagnosis and treatment of motility disorders requires an understanding of normal colonic contractility against which to measure dysfunction. Through state-of-the-art recording and analytical techniques, developed by the applicants, this project will provide the first clear description of normal human colonic motor patterns and how they are generated.
The Potential Benefit Of Resistant Starch On Zinc Retention And Its Potential For Utilisation In Infants At Risk Of Zinc Deficiency.
Funder
National Health and Medical Research Council
Funding Amount
$101,991.00
Summary
Resistant starch (RS) can promote absorption of minerals such as calcium and magnesium from the large intestine. As zinc deficiency in children from the developing world remains a major public health issue, we will use a rodent model to determine if RS can improve zinc absorption in growing rats with preceeding zinc deficiency. In parallel we will also determine whether infants, who are most vulnerable to the effects of zinc deficiency, have the gut bacteria required to utilise the potential and ....Resistant starch (RS) can promote absorption of minerals such as calcium and magnesium from the large intestine. As zinc deficiency in children from the developing world remains a major public health issue, we will use a rodent model to determine if RS can improve zinc absorption in growing rats with preceeding zinc deficiency. In parallel we will also determine whether infants, who are most vulnerable to the effects of zinc deficiency, have the gut bacteria required to utilise the potential and known health benefits of RS.Read moreRead less
Neural Control Of Colorectal Function And Identification Of Sites Of Drug Action
Funder
National Health and Medical Research Council
Funding Amount
$375,489.00
Summary
Constipation is a considerable problem, especially in the elderly; it occurs in 20-25% of people over 65 and in about 50% of people in nursing homes. It is also a significant concern for children, with up to 30% being affected. There are no adequate treatments and the majority of people are dissatisfied with their management. We have discovered a class of compounds that stimulate defecation. In this project we will test the effectiveness of these compounds to relieve constipation.