Effect of chemical ablation of myenteric neurons on neurotransmitter levels in the rat jejunum.

Abstract:

:We have quantified neurotransmitter changes in the rat jejunum in which the myenteric neurons were ablated by serosal application of benzalkonium chloride. Within 2 days after benzalkonium chloride treatment, there was a 40% reduction in the activity of choline acetyltransferase, a specific marker for cholinergic neurons, and a 25% reduction in the amount of vasoactive intestinal peptide per centimeter length of jejunum. By 15 days, levels were comparable to those in control segments, and by 45 days after myenteric neuronal ablation, levels in treated tissues were twice those in controls. In contrast, we observed no reduction in the amount of leucine-enkephalin per centimeter length of jejunum at early times after benzalkonium chloride treatment, although by 45 days, levels of this neurotransmitter in treated segments of jejunum were more than twice those in controls. Significant increases in muscle thickness and tissue weight were also observed at 15, 30, and 45 days after myenteric neuronal ablation. Thus we have observed that in response to chemical ablation of myenteric neurons in the rat jejunum, there is a thickening of the smooth muscle layers and a compensatory increase in the production of certain neurotransmitters by the surviving neuronal elements in the gut.

journal_name

Gastroenterology

journal_title

Gastroenterology

authors

Dahl JL,Bloom DD,Epstein ML,Fox DA,Bass P

doi

10.1016/0016-5085(87)90126-0

subject

Has Abstract

pub_date

1987-02-01 00:00:00

pages

338-44

issue

2

eissn

0016-5085

issn

1528-0012

pii

0016-5085(87)90126-0

journal_volume

92

pub_type

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