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The present study was undertaken to investigate the biochemical characteristics of the opioid receptors and opioid peptides in the jerboa (Jaculus orientalis) brain, a sub-desert rodent of Morocco. We have demonstrated the presence of δ, μ, and κ sites in the jerboa brain. The endogenous opioid peptides methionine-enkephalin, β-endorphin, and dynorphin were evaluated in different physiological states...
Neonates, as compared to older subjects, exhibit increased signs of relative respiratory suppression such as apnea, periodic breathing and only transient hyperventilatory response to hypoxia. Prenatal cocaine exposure exaggerates the respiratory pattern disturbances observed in infants. As endogenous opioids cause central suppression of breathing, we tested their possible involvement in these effects...
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