Influence of amygdaloid glutamatergic receptors on sensory and emotional pain-related behavior in the neuropathic rat.
The role of amygdaloid glutamatergic receptors (GluRs) in maintenance of the sensory versus emotional component of neuropathic pain was studied by assessing monofilament-induced limb withdrawal response (sensory pain) and aversive place-conditioning behavior (emotional pain) following amygdaloid administration of various glutamatergic compounds in nerve-injured animals. The results indicate that endogenous activation of amygdaloid group I metabotropic GluRs, mGluR(1) and mGluR(5), and the NMDA-R contributes to maintenance of sensory and emotional components of neuropathic pain. The predominant effect by amygdaloid group I mGluRs was facilitation of emotional-like pain behavior.
Ansah
Osei B
OB
Institute of Biomedicine/Physiology, University of Helsinki, Helsinki, Finland.
Bourbia
Nora
N
Gonçalves
Leonor
L
Almeida
Armando
A
Pertovaara
Antti
A
D000679:Amygdala / Q000187:drug effects / Q000378:metabolism*; D000818:Animals; D004644:Emotions / Q000187:drug effects / Q000502:physiology*; D018690:Excitatory Amino Acid Agonists / Q000494:pharmacology; D018691:Excitatory Amino Acid Antagonists / Q000494:pharmacology; D006930:Hyperalgesia / Q000209:etiology; D008297:Male; D010146:Pain / Q000209:etiology*; D010147:Pain Measurement / Q000379:methods; D017288:Pain Threshold / Q000187:drug effects / Q000502:physiology; D020427:Peroneal Neuropathies / Q000150:complications* / Q000473:pathology*; D051381:Rats; D017208:Rats, Wistar; D017470:Receptors, Glutamate / Q000145:classification / Q000378:metabolism*
D018690:Excitatory Amino Acid Agonists; D018691:Excitatory Amino Acid Antagonists; D017470:Receptors, Glutamate