Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits.

Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits. Research Abstract Details 

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Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits. Abstract Text:

N ,J Pavel,

The latest research reveals that nitric oxide as a gas messenger may diffuse into the surrounding extracellular fluid and act locally upon neighboring target cells. However, several observations raise the possibility that nitric oxide may also be released at a greater distance from the neuronal cell body. The catalytic nitric oxide synthase (cNOS) activity was therefore studied in the cervicothoracic and lumbosacral segments of the spinal cord of rabbits, including the white matter of dorsal columns (DC), lateral columns (LC) and ventral columns (VC), as well as the gray matter of dorsal horns (DH), intermediate zone (IZ) and ventral horns (VH). Lower cNOS activity was found in the white matter of both cervicothoracic (47%) and lumbosacral (30%) regions, whereas that detected in the gray matter of the lumbosacral part of the spinal cord was considerably higher (70%). Enzyme activity varied from 43.4 to 77.2 dpm/microg protein in the cervicothoracic segments of the gray matter in the descending order: DH>VH>IZ. Similar cNOS activity was found in the white matter of the cervicothoracic segments (42.1-62.8 dpm/microg protein). When the activity of cNOS was compared in the lumbosacral segments, the highest enzyme activity was found in DH of the gray matter (198.7 dpm/microg protein) and the lowest cNOS in DC (45.8 dpm/microg protein) of the white matter. It was concluded that the white matter of the spinal cord contains similar cNOS activity in comparison to the gray matter.

Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits. Publishing Authors By Initials

N ,J Pavel,

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Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Physiological research / Academia Scientiarum Bohe

VOLUME: 49

Page Numbers: 167-73

Journal Abbreviation: Physiol Res

ISSN: 0862-8408

DAY: 2

MONTH: 04

YEAR: 2000

Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9112413

Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits. Keywords Mesh Terms:

KEYWORDS: Tritium

MESH TERMS: enzymology

Chemical & Substance for Abstract: Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits. Information

Substance Name: Nitric Oxide Synthase

Registry Number: EC 1.14.13.39

Grant and Affiliation Information for Catalytic nitric oxide synthase activity in the white and gray matter regions of the spinal cord of rabbits.

AFFILIATION: Institute of Neurobiology, Slovak Academy of Sciences, Kosice, Slovak Republic. lukacova@saske.sk

Country: CZECH REPUBLIC

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MEDLINETA: Physiol Res

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