Effect of Chagas' disease on nitric oxide-containing neurons in severely affected and unaffected intestine

The pathophysiology of Chagas' disease is incompletely understood. Neuronal nitric oxide has been cited as a candidate neurotransmitter responsible for relaxation of the internal anal sphincter. Neuronal nicotinamide adenine dinucleotide phosphate diaphorase can be used as a marker for neuronal...

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Veröffentlicht in:Diseases of the colon & rectum 1998-11, Vol.41 (11), p.1411-1417
Hauptverfasser: RIBEIRO, U. JR, SAFATLE-RIBEIRO, A. V, HABR-GAMA, A, GAMA-RODRIGUES, J. J, SOHN, J, REYNOLDS, J. C
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container_end_page 1417
container_issue 11
container_start_page 1411
container_title Diseases of the colon & rectum
container_volume 41
creator RIBEIRO, U. JR
SAFATLE-RIBEIRO, A. V
HABR-GAMA, A
GAMA-RODRIGUES, J. J
SOHN, J
REYNOLDS, J. C
description The pathophysiology of Chagas' disease is incompletely understood. Neuronal nitric oxide has been cited as a candidate neurotransmitter responsible for relaxation of the internal anal sphincter. Neuronal nicotinamide adenine dinucleotide phosphate diaphorase can be used as a marker for neuronal nitric oxide synthase. This study was designed to examine the alterations of the nitric oxide-containing neurons in the enteric nervous system of the colon of patients who underwent resections for advanced megacolon and to compare these specimens with small-bowel specimens from the same patients and with specimens from control subjects. Specimens from resected rectum and extramucosal small-bowel biopsy specimens from 11 patients with Chagas megacolon but no apparent small-bowel clinical involvement were compared with the uninvolved colon and jejunum of 10 control patients with colon cancer. Tissues were fixed in Zamboni solution and evaluated by histochemistry for nicotinamide adenine dinucleotide phosphate diaphorase-containing neurons. Reactivity was evaluated on a 0 to 4 scale in the longitudinal muscle, myenteric plexus, circular muscle, submucosal plexus, and mucosa. Specimens from control patients showed well-stained myenteric and submucosal neurons and an abundant network of terminal nerve fibers in the muscle layers. Chagasic specimens had decreased staining in all layers of the gut. Overall there was a statistically significant decrease in nicotinamide adenine dinucleotide phosphate diaphorase-containing neurons. Biopsy specimens from clinically uninvolved small bowel of patients with Chagas' disease also showed decreased reactivity, but to a lesser degree. Nicotinamide adenine dinucleotide phosphate diaphorase activity is decreased in patients with advanced megacolon. The alterations are more relevant in the myenteric plexus and the circular muscle. Reactivity is also diminished in the clinically uninvolved small bowel, but to a lesser extent.
doi_str_mv 10.1007/bf02237058
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Specimens from resected rectum and extramucosal small-bowel biopsy specimens from 11 patients with Chagas megacolon but no apparent small-bowel clinical involvement were compared with the uninvolved colon and jejunum of 10 control patients with colon cancer. Tissues were fixed in Zamboni solution and evaluated by histochemistry for nicotinamide adenine dinucleotide phosphate diaphorase-containing neurons. Reactivity was evaluated on a 0 to 4 scale in the longitudinal muscle, myenteric plexus, circular muscle, submucosal plexus, and mucosa. Specimens from control patients showed well-stained myenteric and submucosal neurons and an abundant network of terminal nerve fibers in the muscle layers. Chagasic specimens had decreased staining in all layers of the gut. Overall there was a statistically significant decrease in nicotinamide adenine dinucleotide phosphate diaphorase-containing neurons. Biopsy specimens from clinically uninvolved small bowel of patients with Chagas' disease also showed decreased reactivity, but to a lesser degree. Nicotinamide adenine dinucleotide phosphate diaphorase activity is decreased in patients with advanced megacolon. The alterations are more relevant in the myenteric plexus and the circular muscle. 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C</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Chagas' disease on nitric oxide-containing neurons in severely affected and unaffected intestine</atitle><jtitle>Diseases of the colon &amp; rectum</jtitle><addtitle>Dis Colon Rectum</addtitle><date>1998-11-01</date><risdate>1998</risdate><volume>41</volume><issue>11</issue><spage>1411</spage><epage>1417</epage><pages>1411-1417</pages><issn>0012-3706</issn><eissn>1530-0358</eissn><coden>DICRAG</coden><abstract>The pathophysiology of Chagas' disease is incompletely understood. Neuronal nitric oxide has been cited as a candidate neurotransmitter responsible for relaxation of the internal anal sphincter. Neuronal nicotinamide adenine dinucleotide phosphate diaphorase can be used as a marker for neuronal nitric oxide synthase. This study was designed to examine the alterations of the nitric oxide-containing neurons in the enteric nervous system of the colon of patients who underwent resections for advanced megacolon and to compare these specimens with small-bowel specimens from the same patients and with specimens from control subjects. Specimens from resected rectum and extramucosal small-bowel biopsy specimens from 11 patients with Chagas megacolon but no apparent small-bowel clinical involvement were compared with the uninvolved colon and jejunum of 10 control patients with colon cancer. Tissues were fixed in Zamboni solution and evaluated by histochemistry for nicotinamide adenine dinucleotide phosphate diaphorase-containing neurons. Reactivity was evaluated on a 0 to 4 scale in the longitudinal muscle, myenteric plexus, circular muscle, submucosal plexus, and mucosa. Specimens from control patients showed well-stained myenteric and submucosal neurons and an abundant network of terminal nerve fibers in the muscle layers. Chagasic specimens had decreased staining in all layers of the gut. Overall there was a statistically significant decrease in nicotinamide adenine dinucleotide phosphate diaphorase-containing neurons. Biopsy specimens from clinically uninvolved small bowel of patients with Chagas' disease also showed decreased reactivity, but to a lesser degree. Nicotinamide adenine dinucleotide phosphate diaphorase activity is decreased in patients with advanced megacolon. The alterations are more relevant in the myenteric plexus and the circular muscle. Reactivity is also diminished in the clinically uninvolved small bowel, but to a lesser extent.</abstract><cop>Secaucus, NJ</cop><pub>Springer</pub><pmid>9823808</pmid><doi>10.1007/bf02237058</doi><tpages>7</tpages></addata></record>
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source MEDLINE; Springer Nature - Complete Springer Journals; Journals@Ovid Complete
subjects Adult
Aged
Biological and medical sciences
Chagas Disease - complications
Chagas Disease - enzymology
Chagas Disease - pathology
Chagas Disease - physiopathology
Female
Human protozoal diseases
Humans
Infectious diseases
Intestines - cytology
Intestines - innervation
Male
Medical sciences
Megacolon - enzymology
Megacolon - etiology
Megacolon - pathology
Megacolon - physiopathology
Middle Aged
NADPH Dehydrogenase - metabolism
Neurons - metabolism
Neurons - pathology
Nitric Oxide - metabolism
Parasitic diseases
Protozoal diseases
Rectum - cytology
Rectum - innervation
Tropical medicine
Trypanosomiasis
title Effect of Chagas' disease on nitric oxide-containing neurons in severely affected and unaffected intestine
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