Abstract:
:Experiments were done to examine the analgesic effect of thiorphan alone or in combination with stress in mice. Analgesia was assessed by measuring jump latencies from a 55 degrees C hot plate. Thiorphan exhibited weak analgesic properties evidenced by significant increases in jump latencies only after 300 mg/kg i.p. Additional experiments were done to see the effect of i.c.v. administration of thiorphan in the mouse hot plate test. Control experiments revealed that either i.c.v. saline or sham caused naloxone reversible analgesia which was potentiated by thiorphan (100 mg/kg i.p.). Immobilization stress-induced analgesia was also potentiated by thiorphan (100 mg/kg i.p.) and antagonized by naloxone (10 mg/kg i.p.). The results suggest that stress-induced analgesia in the mouse is associated with an endogenous opioid mechanism which is potentiated when enkephalin degradation is inhibited by thiorphan.
journal_name
Life Scijournal_title
Life sciencesauthors
Greenberg R,O'Keefe EHdoi
10.1016/0024-3205(82)90338-1subject
Has Abstractpub_date
1982-09-20 00:00:00pages
1185-8issue
12-13eissn
0024-3205issn
1879-0631pii
0024-3205(82)90338-1journal_volume
31pub_type
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