M2 macrophages can produce various endogenous opioids, such as endorphins, enkephalin, and dynorphin, which activate opioid receptors at the site of inflammation.
Researchers discover how sodium influences the signalling of opioid receptors.
Researchers have new evidence in rats to explain how it is that chocolate candies can be so completely irresistible. The urge to overeat such deliciously sweet and fatty treats traces to an unexpected part of the brain and its production of a natural, opium-like chemical.
