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The endorphins are all synthesized from the precursor protein, proopiomelanocortin, and all contain a Met-enkephalin motif at their N-terminus: Tyr-Gly-Gly-Phe-Met. [12] α-endorphin and γ-endorphin result from proteolytic cleavage of β-endorphin between the Thr(16)-Leu(17) residues and Leu(17)-Phe(18) respectively.
Other side effects common to opiates such as vasodilation, respiratory depression, urinary retention, and gastrointestinal reaction develop. [4] However, the endomorphin-induced side effects prove slightly less severe than those of the morphine-derived analgesics commonly used today.
β-endorphin is expressed in Pro-opiomelanocortin (POMC) cells in the arcuate nucleus, in the brainstem and in immune cells, and acts through μ-opioid receptors. β-endorphin has many effects, including on sexual behavior and appetite. β-endorphin is also secreted into the circulation from pituitary corticotropes and melanotropes.
However, many are associated with an infamous side effect: weight gain. ... It’s also a great way to stimulate the release of feel-good chemicals called endorphins, which may enhance your moods. ...
β-Endorphin (beta-endorphin) is an endogenous opioid neuropeptide and peptide hormone that is produced in certain neurons within the central nervous system and peripheral nervous system. [1] It is one of three endorphins that are produced in humans, the others of which include α-endorphin and γ-endorphin. [2]
The structure of the inactive μ-opioid receptor has been determined with the antagonists β-FNA [6] and alvimopan. [7] Many structures of the active state are also available, with agonists including DAMGO, [8] β-endorphin, [9] fentanyl and morphine. [10]
Naloxone has been shown to block the action of pain-lowering endorphins the body produces naturally. These endorphins likely operate on the same opioid receptors that naloxone blocks. It is capable of blocking a placebo pain-lowering response if the placebo is administered together with a hidden or blind injection of naloxone. [55]
This side effect is dose-dependent and occurs in both therapeutic and recreational users. Morphine can interfere with menstruation by suppressing levels of luteinizing hormone. Many studies suggest the majority (perhaps as many as 90%) of chronic opioid users have opioid-induced hypogonadism.