Neurotransmitters and neuromodulators involved in laryngeal innervation.

Neurotransmitters and neuromodulators involved in laryngeal innervation. Research Abstract Details 

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Neurotransmitters and neuromodulators involved in laryngeal innervation. Abstract Text:

Y Hisa,S Koike,N Tadaki,H Bamba,K Shogaki,T Uno,

The distribution and role of neurotransmitters and neuromodulators in laryngeal innervation are reviewed, and our recent findings regarding the nitrergic innervation of the larynx are demonstrated for the better understanding of the complexity of the laryngeal innervation system. Noradrenergic innervation of the larynx was studied with fluorescence histochemistry and electron microscopy after application of 5-hydroxydopamine. These studies confirmed the existence of noradrenergic innervation for the submucosal glands and blood vessels, and the origin and course of noradrenergic nerve fibers contained in the laryngeal nerves and their destinations in the larynx. Cholinergic innervation of the larynx has not been clarified in detail. Many kinds of neuropeptides have been demonstrated to be involved in laryngeal innervation. Vasoactive intestinal polypeptide originating from intralaryngeal ganglionic neurons participates in laryngeal vasodilation and reduction of laryngeal seromucous secretion. Neuropeptide Y nerve fibers are few in the larynx, and most originate from the superior cervical ganglion. They are distributed around the large or medium-sized blood vessels, especially arteries. They are also associated with excretory structures. Substance P was the first neuropeptide found to be a sensory neurotransmitter in the laryngeal afferent system. It is also involved in regulation of laryngeal blood flow and secretion. Calcitonin gene-related peptide is associated with the sensory, autonomic, and motor innervation of the larynx. The majority of enkephalin nerve fibers are located close to excretory structures, although no information on the physiological significance of enkephalin is available. In addition to the above neuropeptides, the peptides histidine isoleucine, histidine methionine, and helospectin have been shown to exist in the larynx. The nitrergic innervation of the larynx has been recently studied with NADPH-diaphorase histochemistry and immunohistochemistry using antiserum against nitric oxide synthase. Nitric oxide originates from the neurons in the intralaryngeal ganglia and is believed to modulate blood flow and secretion of the larynx. It controls the laryngeal exocrine secretion in cooperation with intrinsic vasoactive intestinal polypeptide and/or extrinsic calcitonin gene-related peptide. Nitric oxide from the nodose ganglion may modulate nociception of the larynx. The existence of nitrergic neurons located in the intrinsic laryngeal muscles has been demonstrated. Many of them are bipolar or pseudounipolar, so they might be sensory in nature. The effect of injury of the recurrent laryngeal nerve on the induction of nitric oxide synthase in the laryngeal motoneurons is also discussed.

Neurotransmitters and neuromodulators involved in laryngeal innervation. Publishing Authors By Initials

Y Hisa,S Koike,N Tadaki,H Bamba,K Shogaki,T Uno,

For similar animals: chordata: vertebrates: mammals: rodentia: muridae: murinae: rats research abstracts see: animals: chordata: vertebrates: mammals: rodentia: muridae: murinae: rats research

PUBMED ID PMID:

MEDLINE DATE:

Neurotransmitters and neuromodulators involved in laryngeal innervation. Journal Published:

PUBLICATION TYPE: Review

Journal: The Annals of otology, rhinology & laryngology. Su

VOLUME: 178

Page Numbers: 3-14

Journal Abbreviation:

ISSN: 0096-8056

DAY: 21

MONTH: Jul

YEAR: 1999

Neurotransmitters and neuromodulators involved in laryngeal innervation. Information

Number of References: 92

LANGUAGE: eng

NlmUniqueID: 1256156

Neurotransmitters and neuromodulators involved in laryngeal innervation. Keywords Mesh Terms:

KEYWORDS: Rats

MESH TERMS: physiology

Chemical & Substance for Abstract: Neurotransmitters and neuromodulators involved in laryngeal innervation. Information

Substance Name: Nitric Oxide Synthase

Registry Number: EC 1.14.13.39

Grant and Affiliation Information for Neurotransmitters and neuromodulators involved in laryngeal innervation.

AFFILIATION: Department of Otolaryngology, Kyoto Prefectural University of Medicine, Japan.

Country: United States

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ACRONYM:

MEDLINETA: Ann Otol Rhinol Laryngol Suppl

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