Alarm pheromone induces stress analgesia via an opioid system in the honeybee. Núñez, J., Almeida, L., Balderrama, N., & Giurfa, M. Physiol Behav, 63(1):75-80, 1997.
abstract   bibtex   
Changes of the stinging response threshold of Apis mellifera scutellata were measured on foragers fixed on a holder and stimulated with an electric shock as a noxious stimulus. The threshold of responsiveness to the noxious stimulus increased when bees were previously stimulated with isopentyl acetate, which is a main component of the alarm pheromone of the sting chamber. This effect is antagonised by previous injection of naloxone-hydrochloride (Endo Laboratories Inc.). Results suggest that in the honeybee an endogenous opioid system activated by isopentyl acetate is responsible for modulation of perception for nociceptive stimuli. The resulting stress-induced analgesia in the defender bee would reduce its probability of withdrawal thus increasing its efficiency against enemies.
@Article{Nunez1997,
  author   = {J. N\'u\~nez and L. Almeida and N. Balderrama and M. Giurfa},
  journal  = {Physiol Behav},
  title    = {Alarm pheromone induces stress analgesia via an opioid system in the honeybee.},
  year     = {1997},
  number   = {1},
  pages    = {75-80},
  volume   = {63},
  abstract = {Changes of the stinging response threshold of Apis mellifera scutellata
	were measured on foragers fixed on a holder and stimulated with an
	electric shock as a noxious stimulus. The threshold of responsiveness
	to the noxious stimulus increased when bees were previously stimulated
	with isopentyl acetate, which is a main component of the alarm pheromone
	of the sting chamber. This effect is antagonised by previous injection
	of naloxone-hydrochloride (Endo Laboratories Inc.). Results suggest
	that in the honeybee an endogenous opioid system activated by isopentyl
	acetate is responsible for modulation of perception for nociceptive
	stimuli. The resulting stress-induced analgesia in the defender bee
	would reduce its probability of withdrawal thus increasing its efficiency
	against enemies.},
  keywords = {Analgesia, Animal, Animals, Bees, Behavior, Biological, Brain, Classical, Cognition, Color, Color Perception, Conditioning, Conditioning (Psychology), Confocal, Cues, Discrimination Learning, Drosophila, Electric Stimulation, Eye, Feces, Ganglia, Heating, Hydroxyurea, Hymenoptera, Insect Proteins, Invertebrate, Larva, Learning, Lighting, Locomotion, Maze Learning, Memory, Microscopy, Models, Mushroom Bodies, Naloxone, Narcotic Antagonists, Neuropil, Nociceptors, Non-P.H.S., Non-U.S. Gov't, Odorant, Odors, Opioid, Organ Size, Orientation, P.H.S., Pattern Recognition, Pheromones, Phot, Plants, Psychological, Receptors, Research Support, Reversal Learning, Smell, Stress, Structure-Activity Relationship, Triatoma, U.S. Gov't, Ultraviolet Rays, Visual, Visual Perception, oreceptors, 9402618},
}

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