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
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 89 (1986), S. 121-124 
    ISSN: 1432-2072
    Keywords: Antinociception ; PGD2 ; Serotonin ; Endogenous opioid peptides ; 5,6-Dihydroxytryptamine ; p-Chlorophenylalanine ; Naloxone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Intracerebroventricular administration of prostaglandin D2 (PGD2), the major PG in the rat brain, produced a dose-related anti-nociceptive effect in rats as assessed by the rat tail-hot wire, hot plate and phenylquinone-induced writhing techniques. The antinociceptive action of centrally-administered PGD2 was markedly attenuated after pretreatment of the rats with 5,6-dihydroxytryptamine, a selective neurotoxin for central serotonergic neurones, and p-chlorophenylalanine, a specific inhibitor of serotonin synthesis, indicating that the PGD2 action is serotonin-mediated. Naloxone, an antagonist of endogenous opioid receptors, also antagonised the antinociceptive action of PGD2. Earlier reports from this laboratory have shown that the antinociceptive action of centrally-administered PGE1 in rats is a serotonin-mediated effect and is also antagonised by naloxone. It was further shown that PGD2, like PGE1, augments serotonin turnover in the rat brain. The present findings support the view that PGD2 shares some of the central actions of PGEs and, like the latter, may function as a neuromodulator in the central nervous system.
    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
    Psychopharmacology 56 (1978), S. 235-237 
    ISSN: 1432-2072
    Keywords: Pentylenetetrazol ; Clonic convulsions ; PGE1 ; PGF2α ; Serotonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Prostaglandin E1-(PGE1-) induced inhibition of pentylenetetrazol (PTZ) convulsions in rats were significantly antagonized after pretreatment with drugs known to reduce brain serotonin activity, but not by pharmacological agents that decrease brain catecholamine activity. PGF2α also significantly inhibited PGE1 action. The results suggest that PGE1-induced inhibition of PTZ convulsions is not a direct effect, but an indirect one mediated through increase in brain serotonin activity.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-2072
    Keywords: Antinociception ; PGE1 ; 5,6-Dihydroxytryptamine ; Serotonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract It is generally accepted that prostaglandins (PGs) are nociceptive substances. However, earlier studies from this laboratory indicated that morphine analgesia, in the rat, was not only serotonin mediated, but involved PGs as well. Several PG synthesis inhibitors were shown to inhibit morphine analgesia and PGE1 was shown to potentiate the antinociceptive effect of morphine. Intraperitoneal administration of PGE1, but not PGE2 and PGF2α, elicited antinociceptive effect per se, by the radiant heat method. The present study was undertaken to confirm the antinociceptive action of PGE1, after intracerebroventricular administration, against nociceptive impulses induced by radiant heat, pressure, and high frequency electric current. PGE1 produced a dose-dependent antinociceptive effect by the radiant heat and pressure methods. It potentiated the antinociceptive action of morphine by the electrical stimulation method. The antinociceptive action of PGE1 was not evident in 5,6-dihydroxytryptamine-pretreated rats, suggesting that this effect is serotonin mediated. The present study thus confirms the antinociceptive action of PGE1 and suggests that, unlike its peripheral action, the central action of PGE1 results in suppression of nociceptive responses which may be serotonin mediated.
    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...