Effects of the ingestion of 2, 4 Dichlorophenoxyacetic acid on jejunal myenteric neurons in rats
Braz. j. morphol. sci
;
28(2): 104-112, Apr.-June 2011. tab, ilus
Article
in English
| LILACS
| ID: lil-644140
ABSTRACT
2,4 dichlorophenoxyacetic acid (2,4-D) is a systemic herbicide. The effects of different levels of 2,4-D on some animal organ systems have been examined, but little is known about its role in the enteric nervous system. The purpose of this study was to verify the effects of 2,4-D administration on the density and morphometry of jejunal myenteric neurons in rats. Ten male rats were assigned to control (C) and experimental (E) groups. For 15 days, group E received, via gavage, 5 mg of 2,4-D.kg1 body weight. On the 16th day, the animals were sacrificed by a lethal dose of thiopental, and the jejunum was removed by laparotomy and used to obtain whole mount preparations for Giemsa staining and NADPH-diaphorase (NADPHd+) histochemistry to identify neurons. The density and cell body area of the myenteric neurons was measured. In the total neuronal population, the neuronal density/mm2 of the jejunum in groups E and C was equivalent, and the cell body area of the rats in group E was lower (p < 0.05) than that of those in group C. For NADPHd+ neurons, the neuronal density did not differ between the groups, although the cell body area was larger (p < 0.05) in group E. It was concluded that even though 2,4-D does not alter the neuronal density in the rat jejunum, it induces cell body atrophy in the general population of neurons and hypertrophy of the NADPHd+ nitric oxide producing neurons without promoting cell death.
Full text:
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Index:
LILACS (Americas)
Main subject:
Enteric Nervous System
/
Intestines
/
Jejunum
/
Myenteric Plexus
/
Nervous System
Limits:
Animals
Language:
English
Journal:
Braz. j. morphol. sci
Journal subject:
Anatomy
Year:
2011
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Aquatic Mammals Foundation/BR
/
São Judas Tadeu University/BR
/
Universidade Estadual de Maringá/BR
/
Universidade Paranaense/BR
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