were reported to be negatively correlated with oxytocin (Bicknell and Leng, 1982; Douglas et al.
peptides and the control of the menstrual cycle.
1] receptor coupling inhibits the endogenous opioid
system by decreasing the sensitivity of both [mu] and [kappa] opioid receptors (Mackie 2008).
Orgasm can act on migraine headache by endogenous opioid
secretion and opioid receptor agonism occurring in initial migraine generator phase.
Opioid drugs act via naturally occurring receptors in the body that normally respond to endogenous opioid
Local analgesic effect of endogenous opioid
Furthermore, there is evidence of an interaction between endogenous opioid
peptides and the dopaminergic mesocorticolimbic system in behavioral responses to stress.
A team led by Jon-Kar Zubieta of the University of Michigan aimed to measure the impact on two chemical messenger systems in the brain--the endogenous opioid
and dopamine systems--when pain was induced and a placebo "treatment" was administered at regular intervals.
Prior studies have suggested that one possible mechanism for tanning dependence is endogenous opioid
release during ultraviolet radiation (UVR) exposure: Blinded study participants demonstrated a preference for UVR vs.
These findings suggest that whereas stress-induced relapse may involve the CRF system, alcohol cue-induced relapse may be mediated by the endogenous opioid
Induction of human mast cell degranulation by opiates and endogenous opioid
peptides: evidence for opiate and non-opiate receptor participation.
The study found major differences between women with serious depression and healthy women in a brain-chemical system that's crucial to stress and emotions, the endogenous opioid