Transient expression of neuronal nitric oxide synthase by neurons of the submucous plexus of the mouse small intestine

Transient expression of neuronal nitric oxide synthase by neurons of the submucous plexus of the... Although neurons containing neuronal nitric oxide synthase (NOS) are abundant in the myenteric plexus of the small intestine of all mammalian species examined to date, NOS-containing neurons are sparse in the submucous plexus, and there does not appear to be an innervation of the mucosa by nerve fibres containing NOS. In this study, we used immunohistochemical techniques to examine the presence of neuronal NOS in the mouse intestine during development. At embryonic day 18 and postnatal day 0 (P0), about 50% of the neurons in the submucous plexus of the small intestine showed strong immunoreactivity to NOS, and NOS-immunoreactive nerve fibres were present in the mucosa. By P7, there was a gradation in the intensity of NOS immunostaining exhibited by submucosal neurons, varying from intense to extremely weak. During subsequent development, the proportion of submucous neurons showing NOS immunoreactivity decreased, and immunoreactive nerve fibres were no longer observed in the mucosa. In adult mice, NOS neurons comprised only 3% of neurons in the submucous plexus, which is significantly less than at P0. In contrast to the submucous plexus, the percentage of neurons that showed NOS immunoreactivity in the myenteric plexus did not change significantly during development. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Cell and Tissue Research Springer Journals

Transient expression of neuronal nitric oxide synthase by neurons of the submucous plexus of the mouse small intestine

Cell and Tissue Research, Volume 291 (3) – Feb 12, 1998

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Publisher
Springer Journals
Copyright
Copyright © 1998 by Springer-Verlag Berlin Heidelberg
ISSN
0302-766X
eISSN
1432-0878
DOI
10.1007/s004410051009
Publisher site
See Article on Publisher Site

Abstract

Although neurons containing neuronal nitric oxide synthase (NOS) are abundant in the myenteric plexus of the small intestine of all mammalian species examined to date, NOS-containing neurons are sparse in the submucous plexus, and there does not appear to be an innervation of the mucosa by nerve fibres containing NOS. In this study, we used immunohistochemical techniques to examine the presence of neuronal NOS in the mouse intestine during development. At embryonic day 18 and postnatal day 0 (P0), about 50% of the neurons in the submucous plexus of the small intestine showed strong immunoreactivity to NOS, and NOS-immunoreactive nerve fibres were present in the mucosa. By P7, there was a gradation in the intensity of NOS immunostaining exhibited by submucosal neurons, varying from intense to extremely weak. During subsequent development, the proportion of submucous neurons showing NOS immunoreactivity decreased, and immunoreactive nerve fibres were no longer observed in the mucosa. In adult mice, NOS neurons comprised only 3% of neurons in the submucous plexus, which is significantly less than at P0. In contrast to the submucous plexus, the percentage of neurons that showed NOS immunoreactivity in the myenteric plexus did not change significantly during development.

Journal

Cell and Tissue ResearchSpringer Journals

Published: Feb 12, 1998

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