Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Inflammation research 47 (1998), S. 49-55 
    ISSN: 1420-908X
    Keywords: Key words: Neurogenic inflammation — Substance P — Hemorphin-7 — Acute injury — Chronic injury
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Objective: Sensory nerves mediate peripheral inflammation via the release of sensory peptides at the site of tissue injury. Using a blister model of inflammation, we have previously documented that endogenous opioids modulate chronic but not acute inflammation. Hemorphins are non-classical opioid peptides found in the region of the β-chain of hemoglobin (Hb). The heptapeptide hemorphin-7 is identical with residues 35-41 of the β-chain of the human Hb. The aim of this study was to examine the effect of hemorphin-7 on the inflammatory response in acute and chronic injury models.¶Methods: We have used a vacuum-induced blister model in the footpad of anaesthetized rats to induce an inflammatory response in naive skin by (a) electrical stimulation (ES) of the distal end of the cut sciatic nerve at 20 V, 5 Hz, 2 ms for 1 min or (b) superfusion of sensory peptides; substance P (SP) or calcitonin gene related peptide (CGRP) over the blister base. In addition, we examined the effect of hemorphin-7 on the inflammatory response to SP induced in a previously injured but healed skin site (recurrent injury model) and in denervated skin site due to chronic nerve lesion (chronic injury model).¶Results: The results showed that prior and concomitant perfusion of hemorphin-7 over the blister base inhibited the acute inflammatory response to ES of the sciatic nerve at C-fibre strength in a dose-dependent manner. Significant inhibition was achieved at 20 and 200 μM concentration of hemorphin-7. When hemorphin-7 (20 μM) was perfused prior to and together with SP or CGRP (both at 1 μM), over the base of acutely induced blister in naive skin, it significantly reduced the inflammatory response to SP (both plasma extravasation and vasodilatation), but was without effect on the vasodilatation response to CGRP. Naloxone, the general opioid antagonist at (1 mg/kg i.v.) reversed the inhibitory effect of hemorphin-7 on the inflammatory response to SP. On the other hand, hemorphin-7 had no effect on the inflammatory response to SP in the recurrent injury or the chronic injury models.¶Conclusions: The results of this study suggest that hemorphins might play a role in inhibiting the inflammatory response in acute, but not in recurrent or chronic injury conditions. Evidence is also provided that the modulatory inhibitory effect of hemorphin-7 is mediated via activation of opioid receptor(s). The significance of this study in conjunction with our previous work, is that it raises the possibility that different endogenous inhibitory mechanisms may operate under different injury conditions — endogenous hemorphins and opioids may modulate acute and chronic inflammation, respectively.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Inflammation research 48 (1999), S. 550-556 
    ISSN: 1420-908X
    Keywords: Key words: Neurogenic inflammation — Substance P — Endomorphin-1 — Acute, recurrent and chronic injury
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Objectives: Neurogenic inflammation is mediated via sensory peptides released from the peripheral terminals of sensory nerves and can be modulated by locally released opioid peptides at the site of injury. Endomorphins are recently discovered endogenous opioid peptides with high selectivity and affinity for the μ-opioid receptor. The aim of this study was to examine the ability of endomorphin-1 (EM-1) to modulate the inflammatory response under different injury conditions. ¶Methods: A vacuum-induced blister model in anaesthetised rats (nembutal 60 mg/kg i.p.) was used to examine the effect of EM-1 on the acute inflammatory response induced by; (1) electrical stimulation (ES) of the distal portion of the exposed/cut sciatic nerve at 20 V, 5 Hz, 2 ms for 1 min or; (2) superfusion of substance P (SP) over the blister base. In addition, the effect of EM-1 on the inflammatory response to SP was examined under acute, recurrent (repeated blister induction) and chronic (chronic sciatic nerve lesion) injury conditions. ¶Results: Prior and concomitant perfusion of EM-1 (100 μM) significantly inhibited the vascular response to ES by 58% compared to controls. EM-1 also inhibited the inflammatory response to SP (both vasodilatation and plasma extravasation) in a dose-dependent manner. Significant inhibition was achieved at 100 μM and 1 mM concentrations of EM-1. Naloxone (1 mg/kg i.v.) reversed the inhibitory effect of EM-1 on the inflammatory response to SP. EM-1 (100 μM) was equally potent in inhibiting the inflammatory response to SP under acute (34% inhibition) recurrent (39%) and chronic (42%) injury conditions. ¶Conclusions: The current results demonstrate a greater inhibitory effect of EM-1 on the inflammatory response to electrical nerve stimulation (58% inhibition) compared to SP (34% inhibition) suggesting the involvement of both pre- and post-terminal mechanisms in the inhibitory modulatory actions of EM-1. Evidence is provided for the involvement of opioid receptors in this inhibitory effect. The results also suggest that EM-1 is equipotent in inhibiting the inflammatory response under different injury conditions.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Rheumatologie 57 (1998), S. S77 
    ISSN: 0340-1855
    Keywords: Key words Nociceptin ; fibromyalgia ; pain ; stress ; sex hormones ; Schlüsselwörter Nociceptin ; Fibromyalgie ; Schmerzsyndrome ; Stress ; Sexualhormone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Fibromyalgie Syndrome (FMS) ist ein bei Frauen häufig vorkommendes Schmerzsyndrom. Die pathophysiologischen Ursachen sind jedoch noch ungeklärt. Veränderungen im Hormonhaushalt der Monoamine, Neuropeptide und von Stresshormonen werden als Ursachen diskutiert. In der vorliegenden Arbeit haben wir die Plasmakonzentrationen des unlängst entdeckten Neuropeptid „Nociceptin“ bei Frauen mit FMS und bei gesunden Kontrollpersonen untersucht. Unsere Resultate zeigen, daß die Konzentration von Nociceptin bei diesen Patienten niedriger waren als bei Kontrollpatienten. Signifikant erniedrigtes Nociceptin fanden wir besonders bei Patienten, die im Vergleich zur Kontrollgruppe Menstruationszyklen mit lutealer Phase hatten. Unsere Resultate deuten also daraufhin, daß gestörte Nociceptinspiegel bei FMS abhängig sind von der Sexual- und Stresshormonregulierung. Diese Störungen könnten neben anderen möglichen Faktoren die pathophysiologische Ursache des FMS sein.
    Notes: Summary Fibromyalgia syndrome (FMS) is a frequent pain disorder in women. The pathophysiologic mechanism behind this disorder is still unexplained; however, alterations in both monoamines, neuropeptides and in the stress axis have been found. This study was designed to determine the levels of the newly discovered neuropeptide nociceptin in hormonally different FMS patients and corresponding controls. The results showed that the nociceptin concentrations of the patients were lower than in controls. It also showed decreased levels with significant differences between the cyclic patients in the luteal phase of the menstrual cycle, compared to the corresponding controls. Our results suggest that the perturbed nociceptin concentrations of the FMS patients may be linked to both the sex hormones and to the stress system and that these changes might be one of several possible pathophysiologic mechanisms involved in the FMS.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 780 (1996), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Experimental dermatology 6 (1997), S. 0 
    ISSN: 1600-0625
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract Circulating isoforms of cellular adhesion molecules (CAMs) have been described recently, and elevated levels of certain sCAMs have been reported in various inflammatory diseases such as systemic lupus erythematosus (SLE). There are previously no reports on sCAMs in cutaneous LE. Sera from 61 patients with LE: systemic (SLE: n= 24), chronic cutaneous (discoid LE, DLE: n= 19) or subacute cutaneous (SCLE: n= 8), chronic biologically false positive (CBFP) reactors for syphilis (n= 10) and 32 controls were examined for sICAM-1, sVCAM-l and sE-Se-lectin with specific ELISA kits. Protocol forms were reviewed. We found significantly elevated levels of sE-Selectin in patients with DLE and widespread cutaneous symptoms, and a correlation between active cutaneous disease as well as polymorphous light eruption (PLE) and elevated levels of sE-Selectin. In contrast, patients with systemic LE did not have elevated levels of sE-Selectin, but in concordance with earlier reports, sICAM-1 and sVCAM-l levels were elevated compared to controls in SLE. as well as in SCLE patients, which has not been reported previously. Since activated endothelial cells are the only source for E-Selcetin, the elevated sE-Selectin level in patients with widespread and active cutaneous disease suggests a more important role for endothelial cells in the pathogenesis of cutaneous LE than previously assumed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 125 (1984), S. 244-250 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 131 (1985), S. 1069-1074 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 167 (1990), S. 1256-1262 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 148 (1987), S. 24-30 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...