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Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
Citation List Month
Backlog
URL Address
<a href="http://doi.org/10.1097/00000542-200407000-00031" target="_blank" rel="noreferrer">http://doi.org/10.1097/00000542-200407000-00031</a>
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Tissue monocytes/macrophages in inflammation: hyperalgesia versus opioid-mediated peripheral antinociception
Publisher
An entity responsible for making the resource available
Anesthesiology
Date
A point or period of time associated with an event in the lifecycle of the resource
2004
Subject
The topic of the resource
Male; Analgesics; Animals; Rats; Biomarkers of Pain; Injections; Pain Measurement/drug effects; Freund's Adjuvant; Wistar; Flow Cytometry; Foot/pathology; Opioid/administration & dosage/pharmacology; Clodronic Acid/pharmacokinetics/pharmacology; Fentanyl/administration & dosage/pharmacology; Heat; Hyperalgesia/chemically induced/pathology/psychology; Inflammation/chemically induced/pathology; Liposomes; Macrophages/pathology; Monocytes/pathology; Non-Narcotic/pharmacokinetics/pharmacology; Pressure
Creator
An entity primarily responsible for making the resource
Brack A; Labuz D; Schiltz A; Rittner HL; Machelska H; Schafer M; Reszka R; Stein C
Description
An account of the resource
BACKGROUND: Opioid-containing leukocytes migrate to peripheral sites of inflammation. On exposure to stress, opioid peptides are released, bind to opioid receptors on peripheral sensory neurons, and induce endogenous antinociception. In later stages of Freund's complete adjuvant-induced local inflammation, monocytes/macrophages are a major opioid-containing leukocyte subpopulation, but these cells also produce proalgesic cytokines. In this study, the role of tissue monocytes/macrophages in hyperalgesia and in peripheral opioid-mediated antinociception was investigated. METHODS: After intraplantar injection of Freund's adjuvant, leukocyte subpopulations and opioid-containing leukocytes were analyzed by flow cytometry in the inflamed paw in the presence or absence of monocyte/macrophage depletion by intraplantar injection of clodronate-containing liposomes (phosphate-buffered saline and empty liposomes served as controls). Paw volume was measured with a plethysmometer. Hyperalgesia was determined by measuring heat-induced paw withdrawal latency and paw pressure threshold. Paw pressure threshold was also measured after swim stress and injection of fentanyl. RESULTS: At 48 and 96 h of inflammation, it was found that (1). monocytes/macrophages were the largest leukocyte subpopulation (> 55% of all leukocytes) and the predominant producers of opioid peptides (71-77% of all opioid-containing leukocytes in the paw), (2). clodronate-containing liposomes depleted monocytes/macrophages by 30-35% (P 0.05), and (4) opioid-containing leukocytes and swim stress but not fentanyl-induced antinociception were significantly decreased by clodronate-containing liposomes (P 0.05, all by t test; opioid-containing cells and swim stress-induced increase of paw pressure threshold were reduced by 35-42% and 20%, respectively). CONCLUSION: Partial depletion of tissue monocytes/macrophages impairs peripheral endogenous opioid-mediated antinociception without affecting hyperalgesia.
2004
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1097/00000542-200407000-00031" target="_blank" rel="noreferrer">10.1097/00000542-200407000-00031</a>
Rights
Information about rights held in and over the resource
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
The nature or genre of the resource
Journal Article
2004
Analgesics
Anesthesiology
Animals
Backlog
Biomarkers of Pain
Brack A
Clodronic Acid/pharmacokinetics/pharmacology
Fentanyl/administration & dosage/pharmacology
Flow Cytometry
Foot/pathology
Freund's Adjuvant
Heat
Hyperalgesia/chemically induced/pathology/psychology
Inflammation/chemically induced/pathology
Injections
Journal Article
Labuz D
Liposomes
Machelska H
Macrophages/pathology
Male
Monocytes/pathology
Non-Narcotic/pharmacokinetics/pharmacology
Opioid/administration & dosage/pharmacology
Pain Measurement/drug effects
Pressure
Rats
Reszka R
Rittner HL
Schafer M
Schiltz A
Stein C
Wistar
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Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
Citation List Month
Backlog
URL Address
<a href="http://doi.org/10.1097/00000542-200301000-00030" target="_blank" rel="noreferrer">http://doi.org/10.1097/00000542-200301000-00030</a>
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Modulation of peripheral endogenous opioid analgesia by central afferent blockade
Publisher
An entity responsible for making the resource available
Anesthesiology
Date
A point or period of time associated with an event in the lifecycle of the resource
2003
Subject
The topic of the resource
Male; Analgesics; Animals; Rats; Injections; Immunohistochemistry; Spinal; Enkephalin; beta-Endorphin/metabolism; Wistar; Pain Threshold/drug effects; Neurons; Afferent/drug effects; Central Nervous System/drug effects; Endorphins/metabolism/physiology; Flow Cytometry; Foot/pathology; Inflammation/pathology; Methionine/metabolism; Morphine/administration & dosage/pharmacology; Opioid/administration & dosage/pharmacology; Peripheral Nerves/drug effects; Psychomotor Performance/drug effects
Creator
An entity primarily responsible for making the resource
Schmitt TK; Mousa SA; Brack A; Schmidt DK; Rittner HL; Welte M; Schafer M; Stein C
Description
An account of the resource
BACKGROUND: Peripheral tissue injury causes a migration of opioid peptide-containing immune cells to the inflamed site. The subsequent release and action of these peptides on opioid receptors localized on peripheral sensory nerve terminals causes endogenous analgesia. The spinal application of opioid drugs blocks the transmission of nociceptive information from peripheral injury. This study investigates the influence of exogenous spinal opioid analgesia on peripheral endogenous opioid analgesia. METHODS: Six and forty-eight hours after initiation of continuous intrathecal morphine infusion and administration of Freund's complete adjuvant into the hind paw of rats, antinociceptive and antiinflammatory effects were measured by paw pressure threshold, paw volume, and paw temperature, respectively. Inflammation and quantity of opioid-containing cells were evaluated by immunocytochemistry and flow cytometry. Cold water swim stress-induced endogenous analgesia was examined 24 h after discontinuation of intrathecal morphine administration. RESULTS: Intrathecal morphine (10 micro g/h) resulted in a significant and stable increase of paw pressure threshold ( P 0.05). At 48 but not at 6 h after Freund's complete adjuvant, the number of beta-endorphin-containing cells and cold water swim-induced antinociception were significantly reduced in intrathecal morphine-treated rats compared with those treated with intrathecal vehicle ( P< 0.05). CONCLUSIONS: These findings suggest an interplay of central and peripheral mechanisms of pain control. An effective central inhibition of pain apparently signals a reduced need for recruitment of opioid-containing immune cells to injured sites.
2003
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1097/00000542-200301000-00030" target="_blank" rel="noreferrer">10.1097/00000542-200301000-00030</a>
Rights
Information about rights held in and over the resource
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
The nature or genre of the resource
Journal Article
2003
Afferent/drug effects
Analgesics
Anesthesiology
Animals
Backlog
beta-Endorphin/metabolism
Brack A
Central Nervous System/drug effects
Endorphins/metabolism/physiology
Enkephalin
Flow Cytometry
Foot/pathology
Immunohistochemistry
Inflammation/pathology
Injections
Journal Article
Male
Methionine/metabolism
Morphine/administration & dosage/pharmacology
Mousa SA
Neurons
Opioid/administration & dosage/pharmacology
Pain Threshold/drug effects
Peripheral Nerves/drug effects
Psychomotor Performance/drug effects
Rats
Rittner HL
Schafer M
Schmidt DK
Schmitt TK
Spinal
Stein C
Welte M
Wistar