Effects of opiate ligands on intraspecific aggression in crickets

Effects of opiate ligands on intraspecific aggression in crickets

In the cricket Gryllus bimaculatus, the opiate antagonist naloxone, 30 μg in 50 μl into hemolymph per animal, caused a release of intraspecific aggression in male-losers and in females. Naloxone had no significant effect on the aggression of winners and isolated males. The agonist of μ-opiate recept...

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Veröffentlicht in:Peptides (New York, N.Y. : 1980) N.Y. : 1980), 2002-05, Vol.23 (5), p.835-841
Hauptverfasser: Dyakonova, Varya, Schürmann, F.-W, Sakharov, D.A
Format: Artikel
Sprache:eng
Schlagworte:
Aggression
Aggression - drug effects
Aggression - physiology
Analgesics, Opioid - metabolism
Analgesics, Opioid - pharmacology
Animals
Competitive Behavior - physiology
DAGO
Enkephalin, Ala-MePhe-Gly- - metabolism
Enkephalin, Ala-MePhe-Gly- - pharmacology
Female
Gryllidae - drug effects
Gryllidae - physiology
Gryllus bimaculatus
Insect
Ligands
Male
Naloxone
Naloxone - metabolism
Naloxone - pharmacology
Narcotic Antagonists - metabolism
Narcotic Antagonists - pharmacology
Opioid Peptides - agonists
Opioid Peptides - antagonists & inhibitors
Opioid Peptides - metabolism
μ-Opiate receptors
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Zusammenfassung:In the cricket Gryllus bimaculatus, the opiate antagonist naloxone, 30 μg in 50 μl into hemolymph per animal, caused a release of intraspecific aggression in male-losers and in females. Naloxone had no significant effect on the aggression of winners and isolated males. The agonist of μ-opiate receptors DAGO, 45 μg, suppressed aggression in male winners and decreased the percentage and duration of contact fights between previously isolated males. The results suggest that, during social contacts, the activity of the endogenous opioid system may contribute to suppressing aggression in subordinate males, as well as in females.
ISSN:0196-9781
1873-5169
DOI:10.1016/S0196-9781(02)00007-4