Abstract

"Responder" Sprague-Dawley (SD) rats that were sensitive to electroacupuncture (EA) in an acute thermal pain test (i.e. tail flick latency [TFL] test) maintained sensitivity to EA in the warm allodynia test after peripheral nerve injury. Similarly, the "non-responder" SD rats that were insensitive to EA in the TFL test were also insensitive to EA in the allodynia test. The EA-induced analgesic effects in the TFL test were significantly higher in CCK-A receptor deficient, Otsuka Long-Evans Tokushima Fatty (OLETF) rats than in their littermates, Long-Evans Tokushima Otsuka (LETO) rats. Similarly, the anti-allodynic effects of EA were significantly greater in OLETF rats than in LETO rats. These results suggest that the individual differences in the sensitivity of acute pain behavior to EA were maintained in neuropathic pain behavior following peripheral nerve injury, and that CCK-A receptor expression plays an important role in mediating this phenomenon. © 2007 Elsevier Inc. All rights reserved.

Author keywords

Acupuncture; CCK-A receptor; Long-Evans Tokushima Otsuka rats; Otsuka Long-Evans Tokushima Fatty rats; Responder and non-responder; Sprague-Dawley rats

Indexed keywords

EMTREE drug terms: cholecystokinin A receptor

EMTREE medical terms: allodynia; animal behavior; animal experiment; article; controlled study; electroacupuncture; male; neuropathic pain; nociception; nonhuman; peripheral nerve injury; priority journal; protein expression; rat; tail flick test; thermal stimulation

MeSH: Animals; Behavior, Animal; Disease Models, Animal; Electroacupuncture; Individuality; Male; Pain; Pain Measurement; Peripheral Nervous System Diseases; Rats; Rats, Inbred OLETF; Rats, Long-Evans; Rats, Sprague-Dawley; Reaction Time; Receptor, Cholecystokinin A
Medline is the source for the MeSH terms of this document.

Chemicals and CAS Registry Numbers: Receptor, Cholecystokinin A