Indiscriminate loss of myenteric neurones in the TNBS‐inflamed guinea‐pig distal colon

This investigation was conducted to establish whether guinea‐pig trinitrobenzene sulfonic acid (TNBS)‐colitis was associated with a change in the number of neurones of the myenteric plexus, and, if so, whether select subpopulations of neurones were affected. Total neurones were quantified with human...

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Published in:	Neurogastroenterology and motility Vol. 17; no. 5; pp. 751 - 760
Main Authors:	Linden, D. R., Couvrette, J. M., Ciolino, A., Mcquoid, C., Blaszyk, H., Sharkey, K. A., Mawe, G. M.
Format:	Journal Article
Language:	English
Published:	Oxford, UK Blackwell Science Ltd 01-10-2005
Subjects:	Animals colitis Colon - drug effects Colon - physiopathology Colonic Diseases - chemically induced Colonic Diseases - pathology enteric nervous system Guinea Pigs Inflammation inflammatory bowel disease Myenteric Plexus - drug effects Myenteric Plexus - pathology Neurons - drug effects Neurons - pathology neutrophils Trinitrobenzenesulfonic Acid - toxicity
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Summary:	This investigation was conducted to establish whether guinea‐pig trinitrobenzene sulfonic acid (TNBS)‐colitis was associated with a change in the number of neurones of the myenteric plexus, and, if so, whether select subpopulations of neurones were affected. Total neurones were quantified with human (Hu) antiserum, and subpopulations were evaluated with antisera directed against choline acetyltransferase, nitric oxide synthase, calretinin, neuronal nuclear protein or vasoactive intestinal peptide (VIP). Colitis was associated with a loss of 20% of the myenteric neurones, most of which occurred during the first 12 h past‐TNBS administration. During this period, myenteric ganglia were infiltrated with neutrophils while lymphocytes appeared at a later time‐point. The neuronal loss persisted at a 56‐day time‐point, when inflammation had resolved. The decrease in myenteric neurones was not associated with a decrease in any given subpopulation of neurones, but the proportion of VIP‐immunoreactive neurones increased 6 days following TNBS administration and returned to the control range at the 56 days. These findings indicate that there is an indiscriminant loss of myenteric neurones that occurs during the onset of TNBS‐colitis, and the loss of neurones may be associated with the appearance of neutrophils in the region.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1350-1925 1365-2982
DOI:	10.1111/j.1365-2982.2005.00703.x