studies on the effect of opioid peptides and opiates on brain function and the changes of brain level of endogenous opioids under various conditions have demonstrated , among others , the role of opioids in stress and stress-induced analgesia , the involvement of various opioid receptors in spinal mechanisms of analgesia , the inhibitory role of dynorphin in seizures in contrast to proconvulsant action of beta-endorphin system and mu receptor , and led to postulation of the role of beta-endorphin interaction with serotonin for ingestive behavior and a possible involvement of beta-endorphin system in the mechanism of action of antidepressant treatments .
C0205753
opioid peptides
C0013355
dynorphin