Participation of Intrinsic Sensory Neurons in the Initiation of Colonic and Gastric Reflexes

Funded Activity 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 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.

Funded Activity Details

Start Date: 01-01-2001

End Date: 01-01-2002

Funding Scheme: NHMRC Project Grants

Funding Amount: $109,448.00

Funder: National Health and Medical Research Council

Research Topics

ANZSRC Field of Research (FoR)

Medical bacteriology

ANZSRC Socio-Economic Objective (SEO)

There are no SEO codes available for this funding activity

Other Keywords

Colonic Function | Enteric Nervous System | Gastroenterology | Intestinal Motility Disorders | Neurology

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