Antisense oligodeoxynucleotides against mu- or kappa-opioid receptors block agonist-induced body temperature changes in rats.
Level 5 - mechanism / opinion, no new human data
Animal laboratory experiment without human clinical data
PubMed 8542317 · doi:10.1016/0006-8993(95)00564-7
What was done
Rats were treated with antisense oligodeoxynucleotides targeted against cloned mu- or kappa-opioid receptors, or control treatments consisting of sense oligonucleotides, missense oligonucleotides, or artificial cerebrospinal fluid. Body temperature changes were subsequently assessed following administration of the mu-agonist PL017 or the kappa-agonist dynorphin A(1-17).
What was found
Treatment with antisense oligonucleotides against mu receptors abolished PL017-induced hyperthermia, whereas sense, missense, and vehicle controls did not. Antisense oligonucleotides against kappa receptors attenuated dynorphin A-induced hypothermia, which was unaffected by sense, missense, or vehicle controls. The abstract does not report numerical values, sample sizes, or effect estimates.
Why it matters
This study provides mechanistic evidence in rodents that mu- and kappa-opioid receptors mediate distinct, opposing pathways in body temperature regulation.
Limits
Findings are limited to animal models with unclear clinical translation. The abstract omits sample sizes, specific dosing parameters, baseline body temperatures, and numerical or statistical values.
Cited by
- supports Dynorphin is part of the thermoregulatory pathway and acts to cool the body down when body temperature rises.