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Text
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<a href="http://doi.org/10.1097/00000542-200401000-00024" target="_blank" rel="noreferrer">http://doi.org/10.1097/00000542-200401000-00024</a>
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Title
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Mobilization of opioid-containing polymorphonuclear cells by hematopoietic growth factors and influence on inflammatory pain
Publisher
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Anesthesiology
Date
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2004
Subject
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Male; Animals; Rats; Biomarkers of Pain; Inflammation/complications; RNA; Pain Measurement/drug effects; Radioimmunoassay; Pain/drug therapy/physiopathology; Wistar; Neutrophils/metabolism; Messenger/biosynthesis; DNA Primers; Reverse Transcriptase Polymerase Chain Reaction; Flow Cytometry; Cell Adhesion Molecules/pharmacology; Cell Separation; Chemokines/biosynthesis; Chemotaxis; Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology; Hindlimb/physiology; Leukocyte/drug effects; Light; Narcotics/metabolism/pharmacology; Stem Cell Factor/pharmacology
Creator
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Brack A; Rittner HL; Machelska H; Beschmann K; Sitte N; Schafer M; Stein C
Description
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BACKGROUND: Leukocytes can control inflammatory pain by secretion of opioid peptides, stimulated by cold-water swimming or local injection of corticotropin-releasing factor, and subsequent activation of opioid receptors on peripheral sensory neurons. This study investigated whether mobilization of polymorphonuclear cells (PMN) by granulocyte colony-stimulating factor (G-CSF) and stem cell factor (SCF) enhances immigration of opioid-containing PMN and peripheral opioid analgesia in rats with Freund complete adjuvant-induced hind paw inflammation. METHODS: In circulating PMN of rats treated with G-CSF+SCF and sham-treated rats, opioid peptide content was measured by radioimmunoassay. Expression of adhesion molecules (CD62L, CD49d, CD18), in vitro migration in the Boyden chamber, and infiltrating leukocytes were analyzed by flow cytometry. Chemokine messenger RNA transcription was quantified by LightCycler polymerase chain reaction. Paw pressure threshold was measured at baseline, after cold-water swimming, and after injection of corticotropin-releasing factor. RESULTS: G-CSF+SCF treatment increased circulating PMN (11-fold, P 0.05). CONCLUSIONS: G-CSF+SCF mobilized circulating opioid-containing PMN but had a minor influence on cell migration and peripheral analgesia, probably because of the low expression of chemokines in the inflamed paw and one of the decreased beta-endorphin content in PMN.
2004
Identifier
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<a href="http://doi.org/10.1097/00000542-200401000-00024" target="_blank" rel="noreferrer">10.1097/00000542-200401000-00024</a>
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Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).
Type
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Journal Article
2004
Anesthesiology
Animals
Backlog
Beschmann K
Biomarkers of Pain
Brack A
Cell Adhesion Molecules/pharmacology
Cell Separation
Chemokines/biosynthesis
Chemotaxis
DNA Primers
Flow Cytometry
Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology
Hindlimb/physiology
Inflammation/complications
Journal Article
Leukocyte/drug effects
Light
Machelska H
Male
Messenger/biosynthesis
Narcotics/metabolism/pharmacology
Neutrophils/metabolism
Pain Measurement/drug effects
Pain/drug therapy/physiopathology
Radioimmunoassay
Rats
Reverse Transcriptase Polymerase Chain Reaction
Rittner HL
RNA
Schafer M
Sitte N
Stein C
Stem Cell Factor/pharmacology
Wistar